SECTION VI(MNC-MAINTENANCE)

GENERAL SPECIFICATION AND REQUIREMENTS FOR ELECTRICAL MAINTENANCE WORKS

Contents
1 Terms and Conditions ............................................................................................................ 4
1.1 General terms and conditions to be followed for all works ................................................. 4
1.2 Conditions specific to maintenance works ........................................................................... 5
1.3 Conditions specific to Motor maintenance works ................................................................ 5
2 Maintenance/Repair of Earth pits........................................................................................... 6
3 Painting of Electrical Equipment ........................................................................................... 6
4 Identification and rectification of faults with or without replacement of accessories ....... 7
5 Supply and Installation of Electrical Accessories ................................................................ 8
6 Installation of Electrical Items................................................................................................ 8
7 Trimming / jungle clearance ................................................................................................... 8
7.1 Trimming of branches ............................................................................................................ 8
7.2 Grass removal ......................................................................................................................... 8
7.3 Jungle clearance..................................................................................................................... 8
7.4 Heavy jungle clearance .......................................................................................................... 8
8 Maintenance of Storage batteries .......................................................................................... 9
9 Maintenance of Street light control unit ................................................................................ 9
10 Painting of following items / cement washing, numbering of RCC poles ........................... 9
10.1 Painting and numbering of RCC pole .................................................................................... 9
10.2 Painting with one coat of primer and two coats of HR Aluminium paint .......................... 10
10.3 Numbering of electrical equipment ..................................................................................... 10
11 Rewinding of different types of motors............................................................................... 10
11.1 Rewinding of fan motors ...................................................................................................... 10
11.2 Rewinding of LT motors ........................................................................................................ 11
11.3 Specification for Polyester Enamelled Round Copper Wire, Class 130 ............................ 12
11.4 Specification for Air Drying Varnishes ................................................................................ 12
12 Replacement of components ............................................................................................... 13
13 Repair/Replacement of heater coils..................................................................................... 14
14 Overhauling & Servicing/Painting/Cleaning of fans & motors........................................... 14
14.1 Overhauling & Servicing/Painting of fans & motors .......................................................... 14
14.2 Cleaning of fans .................................................................................................................... 16
15 Attending to breakdown calls: ............................................................................................. 16
15.1 Attending minor breakdown calls........................................................................................ 16
15.2 Attending to break down faults of Motors........................................................................... 16

Section – VI (Part – I) Page 1 of 24

15.3 Attending to break down faults in various types of Ceiling/Exhaust/Pedestal/Wall
mounting /Air circulator Fans ........................................................................................................ 16
16 Supply and installation / replacement of following components (motor maintenance)... 16
16.1 Supply and installation of Electronic Regulator for ceiling fans as per scope of work ... 16
16.2 Supply and installation of protective wire mesh for Fans.................................................. 16
16.3 Supply and replacement of blades for Exhaust / pedestal fans ............................................... 17
17 Maintenance of MCC/Transformer/Feeder pillar/ 4 or 2 pole HV outdoor
structures/DB/SFU/Starters etc. ..................................................................................................... 17
17.1 Maintenanceon11 KV 4 pole / 2 pole Structure ................................................................... 17
17.2 Maintenance of PCC / MCC / LT Panels / Feeder Pillar/ EOT crane panel/SF Units ............... 17
17.3 Maintenance of Power & Lighting DBs................................................................................ 18
18 Maintenance of Distribution/Power transformer ................................................................ 18
18.1 Annual maintenance on Distribution transformer of capacity500 kVA to 7 MVA ............. 18
18.2 Half yearly maintenance on Distribution transformer of capacity 500 kVA to 7 MVA....... 19
18.3 Annual maintenance on Power transformer of capacity above 7MVA and upto 20 MVA. 19
18.4 Half yearly maintenance on Power transformer of capacity above 7MVAand upto 20 MVA. ........ 20
19 Removal of equipment ......................................................................................................... 20
20 Oil filtration/testing/ Breather /Recording reading ............................................................. 20
20.1 Operation of Transformer Oil Filtration plant...................................................................... 20
20.2 Recording of Hourly Reading of Electrical Parameters ..................................................... 20
20.3 BDV Test for Transformer oil................................................................................................ 21
21 Installation/Removal/Replacement of different type of light fixtures ................................ 21
22 Attending to Fuse off calls in various lab/buildings........................................................... 21
23 Temporary installation of Flood light fixtures ..................................................................... 21
24 Inspection and testing of various electrical equipment/ components .............................. 22
25 Maintenance of service connection ..................................................................................... 22
26 Cleaning of Cable Trenches ................................................................................................. 22
27 Disconnection of service connection .................................................................................. 23
28 Collecting and shifting of scrap items ................................................................................ 23
29 Providing Service connection .............................................................................................. 23
30 Temporary Laying of Cables ................................................................................................ 23
31 Shifting of equipment ........................................................................................................... 24
32 Shifting of cable drums ........................................................................................................ 24

Section – VI (Part – I) Page 2 of 24

 Abbreviations
American Society for Testing MS Mild steel
ASTM
and Materials standards NB Nominal Bore
C Commissioning Nos. Numbers
Central Board of Irrigation OD Outer Diameter
CBIP
and Power Original Equipment
OEM
CFL Compact Fluorescent Lamp Manufacturer
DB Distribution Box PCC Plain Cement Concrete
DMC Dough Moulding Compound Polythene Insulated Jelly
PIJF
EIC Engineer in charge Filled
Earth Leakage Circuit PIR Passive Infrared
ELCB
Breaker PTL Post Top Lantern
EP Embedded Plate PU Poly Urethane
ERW Electric Resistance Welding RCC Reinforced Cement Concrete
ETP Electrolytic Tough Pitch Residual Current Circuit
RCCB
FRLS Fire Retardant Low Smoke Breaker
FRP Fibre Reinforced Plastic RPM Revolutions Per Minute
GI Galvanized Iron S Supply
HDPE High Density Poly Ethylene Supply, Installation, Testing &
SITC
HF High Frequency Commissioning
HP Horse Power Switch Disconnector Fuse
SDFU
Heat Retardant Poly Vinyl Unit
HRPVC
Chloride SFU Switch Fuse Unit
High tension (voltages above SLD Single Line Diagram
HT
1100V) SMC Sheet Moulding Compound
I Installation SOQ Schedule of Quantities
Indian Electricity Rules 1956 SS Stainless Steel
IE Rules
and its latest amendments T Testing
International Electro- THD Total Harmonic Distortion
IEC
technical Commission UG Underground
Institution of Electrical Vertical Three Phase Neutral
IEE VTPN DB
Engineers Distribution Box
IP Ingress Protection XLPE Cross Linked Polyethylene
IR Insulation Resistance
IS Indian Standards
International Organization
ISO
for Standardization
JB Junction Box
LAN Local Area Network
LDR Light Dependant Resistor
LED Light Emitting Diode
Low tension (voltages up to
LT
1100V)
MCB Miniature Circuit Breaker
Moulded Case Circuit
MCCB
Breaker

Section – VI (Part – I) Page 3 of 24

1 Terms and Conditions

1.1 General terms and conditions to be followed for all works

a. The Contractor shall employ a Supervisor for supervising their work force and
Electricians/Wireman for carrying out work with sufficient mode of conveyance. Supervisor and
electrician/ wireman shall have B-license.
b. The contractor shall take Insurance Policy for the individuals employed for the work covered
under this contract. License of workmen and Insurance Policy shall be produced to the Engineer-
in-Charge, before signing the contract agreement.
c. In case of default on the part of the contractor in carrying out such orders, the Engineer- in-
Charge is entitled to terminate the contract.
d. The Contractor shall submit the list of tools and testing equipment proposed to be used for the
work. The same shall be available at site during the entire period of contract.
e. All materials brought to site by the contractor shall have delivery challan duly signed by the
contractor, authorized representative and submit the challan to the department for the
verification.
f. The Contractor is advised to study the systems and nature of work involved before quoting the
tender.
g. Power supply required for the work covered, under the scope of this contract will be provided by
the department free of cost.
h. List of Engineer, Supervisor with their Supervisor’s Competency License details, Technicians
with details of their relevant experience to be employed for this work shall be furnished.
i. All safety precautions are to be taken while at work. Experienced Wireman holding Wireman/
Electrician License shall only be employed as required.
j. Necessary isolation shall be obtained following the prevailing departmental rules before working
on live lines. While working with live electrical systems electrical safety is of paramount
importance and all the rules as laid down in this document shall be followed scrupulously. No
work to be done any live system and necessary isolation shall be done in consultation with
Engineer-in-Charge before opening any live enclosure
k. Site Engineer of the contractor shall meet the Engineer-in-charge on all working days and
finalize the work to be executed on each day with the approval of the Engineer-in-Charge. He
should be present at the work spot during the working hours.
l. Details of cable laid on each day shall be submitted to the Engineer-in-charge in the approved
format positively the next working day.
m. The contractor shall follow strictly all the rules / procedures /Codes of the Department in practice
and follow the security rules of the Department regarding issue of identity cards, tokens etc., as
may be framed time to time by the Department.
n. Street light ladder, Testing instruments like BDV test kit etc will be issued by Dept free of cost
depending on availability.
o. The Contractor shall employ Security Personnel at his own cost to protect the Equipment and all
materials / installations until the entire work is completed and handed over to the Department.
p. In case, if any one of the departmental equipment or instrument involved in the work suffers from
damage or loss of components the same will be procured by the Contractor and made good,

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 failing which the Engineer – in –Charge will carry out the repair / replacement and recovery will
be affected towards the cost of repair/replacement from the Contractor’s Running account bill.
q. Wherever height work is involved, It is the responsibility of the contractor to use adequate safety
gadgets, ladders / scaffolding while carrying out the works. Also, height work permit shall be
obtained from safety division of IGCAR.
r. One sample of every item shall be got approved by the Engineer-in-Charge before bulk
purchase.
1.2 Conditions specific to maintenance works

a. For maintenance works minimum TWO groups (Each group shall be consisting of one electrician
and one helper) shall be made available for different work covered under this contract and also
provide additional groups as required for emergency works.
b. The Lighting or power installations mentioned in the schedule are located in different Labs/
buildings at IGCAR, the contractor has to inspect and assess the quantum of work involved
before quoting for maintenance tenders.
c. The quantities shown in the tender schedule are tentative and there may be wide variation at the
time of execution in maintenance contracts.
d. For maintenancecontracts part payment will be released once in FOUR MONTHS only, through
Running Account (Part) Bill.
e. For maintenance contracts, the contract is generally valid for a period of 12 months from the
date of work order. At the discretion of the department, the contract may be considered for
RENEWAL for further period of ONE YEAR on the same terms & condition of this contract.
f. The contractor shall be fully prepared to work on holidays or after office hours and mobilize man
power and commence the work with in short notice in case of any emergency break down work.
g. The contractor or his supervisor shall be based within 10 Km radius to the Kalpakkam site, in
order to mobilize the manpower quickly and commence the work.
h. In case of any Emergency break down after office hours and holidays, the contactor shall be
able to contact over phone or in person and he has to mobilise man power and material to attend
the break down at the earliest (within Two hours). Hence the contractor is advised to mention his
residential address and contact phone No.
i. The contractor is required to bring three sets of general tool kit necessary for maintenance work
and the same shall be kept in IGCAR for a period of One year.
j. The faulty accessories removed from the fittings shall be disposed off /stored as instructed by
the Engineer-in-Charge.
k. After attending the fault and before putting into service insulation resistance test and earth
continuity test shall be conducted on the equipment wherever required as directed by the EIC.
1.3 Conditions specific to Motor maintenance works

a. The Contractor shall submit the list of tools and testing equipment being used for the servicing of
motors. The same shall be available at site during the entire period of contract. Contractor shall
have 1000/500 Volt megger, 200 Amp clamp meter, digital multimeter, tachometer etc.
b. Overhauling program of motors covered under this tender shall be prepared by the contractor
and got approved by the Engineer in charge.

Page 5 of 24
c. The scope of work of the contract in overhauling of LT motors as listed under this section is only
for guidance. The scope of this item includes carrying out all other works required for the
overhauling of motors as per relevant standards, applicable to Motors.
d. For Mono-block pump sets, departmental staff will take care of pump side work if problem exist
on pump side.
e. The motors mentioned in the schedule are located in different Labs/buildings/outdoor systems at
IGCAR. The contractor has to inspect and assess the quantum of work involved before quoting.
f. For all work items under this section, wherever the work is to be carried out after removal of the
equipment, the scope of work includes removal, carrying out the work as per specifications,
testing, obtaining approval from Engineer-in-Charge, reinstallation & commissioning at original
location or as specified by the Engineer-in-Charge. Wherever the equipment is to be taken out of
the campus necessary returnable gate pass will be arranged by the Engineer-in-Charge. All the
transportation shall be arranged by the contractor including bringing back after work completion
without any extra cost to the dept.
2 Maintenance/Repair of Earth pits

a. The scope covers maintenance / repair of Earth pits located at various locations in IGCAR
campus. Activities involved under this item are listed below:
b. The contractor should follow all the safety procedures such as disconnection of earth leads after
obtaining line clear from Engineer-in-Charge.
c. Physical inspection on Earth pits is to be carried out and in case of any abnormality it is to be
intimated to the Engineer-in-charge.
d. Remove Earth pit outgoing leads and clean with Toluene (liquid) or equivalent and reconnect
after maintenance.
e. Checking of bolts, nuts and washers for tightness. Damaged bolts, nuts and washers if any shall
be supplied and replaced with SS bolts and nuts of same size as the damaged one.
f. After completion of work earth resistance of the earth pit shall be measured by Earth Resistance
Megger and the values shall be furnished in the approved format. Measurement shall be done in
the presence of Department employee. Details of Earth pit (such as Earth pit Name or Number,
Resistance value and Date of measurement) shall be painted as directed by the Engineer-in-
Charge. Numbering shall be painted inside the chamber and the cover with black letters on
yellow background. In case of earth pits with top cast iron cover, the cast iron cover shall be
painted with black epoxy paint.
g. The scope of this work also involves the removal of vegetation growth inside and around the
earth pit (750 mm), Pouring water, treatment of earth pits by mixing up of Bentonite powder etc.
h. Wherever schedule refers to repair of earth pits, damaged earth pit chambers shall be repaired
and brought back to original. In case of major damage as assessed by the Engineer-in-Charge
the chamber shall be replaced by new chamber as per drawing No. IGC/ESD//5060/1001/1,
1001/1, 1007/1after providing a fresh layer of 1:4:8 PCC mud mat of thickness 150mm.
i. All the materials required for completion of above work shall be arranged by the contractor.
3 Painting of Electrical Equipment
a. This item covers painting of electrical equipment which includes switchboards, feeder pillars,
transformers bus bars, bus ducts, chequered plates, fans etc as specified in the Schedule of
quantities. General specification for painting under this item is as follows:

Page 6 of 24
b. The Contactor shall follow all the safety procedures such as obtaining Line clear, display of Men
on line board, discharging the switched off lines etc., before starting the Painting on electrical
equipment except various types of fans.
c. Before painting, dust, dirt and oil from the outer surface of the equipment to be painted shall be
removed thoroughly. Wherever required as directed by the Engineer-in-Charge the surface shall
be cleaned with the help of emery paper/emery cloth and followed by thorough cleaning with
thinner.
d. After cleaning of rusted areas with emery paper, the cleaned surface shall be painted with red
oxide primer before painting with synthetic enamel paint.
e. Wherever meters, relays, selector switches etc. are provided, it must be properly protected by
paper or grease as directed by Engineer-in-Charge.
f. Engraved parts like name plate of Panels/feeders or caution boards etc shall be properly
greased before painting and it must be thoroughly cleaned after completion of painting.
g. Stencilled letters shall be noted down before painting and it must be stencilled after completion
of painting work.
h. Un-wanted paint from the surface where it is not required must be thoroughly removed. Spillage
of paint on the ground shall be avoided and if it falls on the ground, it shall be fully removed.
i. Wherever permitted/instructed by the Engineer-in-Charge spray painting shall be followed.
j. Colour scheme to be followed will be same as the original colour of the equipment unless
otherwise specified by the schedule or by the Engineer-in-Charge.
k. Type of paint, primer, and number of coats shall be as mentioned in the schedule.
l. Sufficient settling time shall be given between coats as directed by Engineer-in-Charge or as per
manufacturer’s recommendations.
m. Painting of various types of fans or air circulators shall be carried out in the specific area allotted
for the work. The fans shall be brought to the allotted location, painting completed and restored
to the original position or to sectional stores as directed by the Engineer-in-Charge.
n. Wherever instructed by the Engineer-in-Charge spray painting shall be employed.
o. The paint thickness shall be minimum 80 micron after final coat

4 Identification and rectification of faults with or without replacement of accessories

a. This item covers identification and rectification of faults in various components of lighting and
power circuits or street light system. The job to be carried out may involve replacement of
accessories also as mentioned in the schedule. In case the schedule refers any accessory as
supply item, its hall be supplied by the Contractor and all other items required for completion of
the job will be provided by the Department. The sundries such as fasteners, bunching tape
required for completion of the work shall be supplied and installed by the contractor.
b. In general the nature of faults include loose connection, terminal burnt, pin contact loose, fault on
lamps, ballasts, starters, ignitors holders, LED drivers, MCBs, switches, street light system
components etc. Please refer the SOQ for nature of fault and type of the system.
c. For indoor systems the accessories include 5A to 16A switches, telephone jacks, TV coaxial
socket, 20A Modular motor starters, modular plates of different sizes, plug tops in
Flush/Concealed type MS switch boxes, MCB etc. the scope of this item includes identifying the
fault and replacing the faulty components in lighting or power circuits. Jumper wires, lugs and
Page 7 of 24
 screws shall be supplied andreplaced wherever required. The switch/socket/MCB/RCCB/RCBO
etc will be issued free of cost unless otherwise stated in the schedule. Supply of crimping lugs,
bunching tape and other required materials are in the scope of this item. Repair shall be carried
out in such a way that the system shall be brought back to its original condition.
d. The faulty components shall be handed over to sectional stores or as directed by Engineer in
charge
5 Supply and Installation of Electrical Accessories

a. Accessories specified in the SOQ shall be supplied and installed. Switches and sockets shall be
generally of modular type (Crabtree/Siemens) unless otherwise specified. LED Drivers shall be
of the same make and type specified or as recommended by the OEM. Removed items shall be
disposed off or returned to sectional stores as directed by Engineer-in-Charge. All the items
required for the completion of work shall be supplied under this item.
6 Installation of Electrical Items

a. The item to be installed will be issued by the department free of cost. All the other required items
like fasteners shall be supplied by the contractor. Installation shall be carried out as directed by
the Engineer-in-Charge.
7 Trimming / jungle clearance

a. All the machineries, tools, tackles required shall be arranged by the contractor. Adequate safety
measures shall be taken while carrying out the work.
7.1 Trimming of branches

a. The scope covers trimming of braches near the street light luminaire including disposal of
removed branches to a location within a lead of 3kM. All the machineries, tools, tackles required
shall be arranged by the contractor. Trolley ladder will be provided by the department based on
availability.
7.2 Grass removal

a. The scope covers removal of grass at the locations specified by the Engineer in-charge and
creeper clearing around street light poles and PTLs for 1 m X 1 m area.
7.3 Jungle clearance

a. The scope covers removal of bulb weeds, grass including cutting all unwanted plants, branches,
twigs, wild growth etc. and disposing the same within 100 meters away manually or burning them
without disturbing the area. Prior permission shall be obtained from the EIC before burning the
wastes.
7.4 Heavy jungle clearance

The scope covers cutting all unwanted plants, branches, twigs, wild growth, tress and saplings
of girth upto 30cm, uprooting of rank vegetation etc, complete and disposing the same 100m
away by manually or burning them without disturbing other areas etc. The useful firewood shall
be cut and stacked at a place approximately 100m lead as directed by EIC. Prior permission
shall be obtained from the EIC before burning the wastes. JCB if required to clear heavy thorn
bushes can be put into service after taking prior permission from EIC. The JCB shall not be
used only above normal earth level and without disturbing near by earth pits, cable route
marker etc. Mechanised removal of plants can be adopted with prior permission from EIC.
Page 8 of 24
 Atmost care shall be taken to avoid any nearby services

8 Maintenance of Storage batteries

a. Storage batteries under this item are mainly used for class –I power supply in Sub-stations /
solar/emergency street lights installed at various locations. There are different types of batteries
like flooded Lead Acid type, VRLA, Ni-Cd, Low maintenance flooded etc, need periodical
maintenance as per manufacturer’s recommendation. The maintenance activities include the
following:
b. In case of Sub-station battery banks LC/Work permits will be availed by Dept. maintenance staff
and work shall commence after getting due permission.
c. In case of Sub-station battery banks LC/Work permits will be availed by Dept. maintenance staff
and work shall commence after getting due permission.
d. Inspection of each cell for specific gravity & level of electrolyte and general cleanliness.
e. Wherever the level is lower than recommended, the cells shall be topped up with distilled water.
Required distilled water will be provided free of cost by the department.
f. Battery terminals and surface shall be cleaned of all dust and dirt and chemical depositions.
Cleaning materials required shall be provided by the contractor.
g. The terminals shall be tightened after cleaning as directed by the EIC and petroleum jelly shall
be applied.
h. In the unlikely event of very low voltage or specific gravity the battery shall be removed,
transported to CSS for repair, taken back to the original location after repair and re-
commissioned. No separate measurement will be done for this activity.
9 Maintenance of Street light control unit

Street and area lighting system is controlled by dawn to dusk controller with the help of LDR or
cyclic timer. Scope of the work includes the following:
a. Inspection of components in the unit for any failure or deterioration
b. General cleaning of the interior and exterior of the unit. All the materials required for cleaning
shall be arranged by the contractor.
c. Replacement of components as directed by the Engineer-in-Charge. Components required for
replacement will be issued free of cost by the department except for crimping lugs and fasteners.
Crimping lugs& fasteners if required shall be provided by the contractor.
d. Tightening of all electrical connections in the unit.
e. Paint touch up if required shall be carried out and all the required material other than specified
shall be provided by the contractor for completion of the work.
10 Painting of following items / cement washing, numbering of RCC poles

10.1 Painting and numbering of RCC pole

a. Under this item already erected RCC poles shall be painted and numbered. It includes the
following steps:
b. The surface of the street light pole shall be cleaned with water and the surface shall be made
free of dirt or any foreign material.

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c. Check for any damages and minor crack and damage if noticed shall be corrected before
painting.
d. After the surface is dried up two coats of cement washing to be done with adequate quantity of
cement and white cement mixture. The covering of cement wash shall be uniform throughout the
pole as per the instruction of the Engineer-in-charge.
e. Numbering of pole shall be done as per clause10.3of this document
10.2 Painting with one coat of primer and two coats of HR Aluminium paint

a. Scope of work includes Aluminium painting of metallic surfaces of equipment as described in the
Schedule. All the items required to complete the work shall be supplied by the contractor. It
includes supply of HR Aluminium paint, suitable primer, cleaning brush etc.
b. Before carrying out the work, the surface to be painted shall be cleaned thoroughly by using
emery sheet as directed by the EIC. Painting process shall include sufficient curing time as
recommended by the manufacturer. The thickness of paint after final coat of paint shall be 80
microns.
10.3 Numbering of electrical equipment

a. Numbering shall be done with synthetic enamel paint of two different colours, one for back
ground and other for letters. The scope of the work is numbering of electrical equipments with
enamel paint. Area to be used for numbering shall be cleaned off all dirt. Two coats of
background painting to be done. Size and shape of back ground shall be as per schedule. Letter
size and colour shall be as directed by the EIC. Item will be measured in numbers.
b. Supply of all items required for completion of work like paint, brushes, stencils are in the scope of
this item.
11 Rewinding of different types of motors

11.1 Rewinding of fan motors

a. The scope of the work includes the following.

b. The fan shall be removed from the location and transported to the work spot identified by the
Engineer-in-Charge.
c. All the components required for completion of the job is in the scope of this item.
d. Dismantle the fan and remove the burnt out windings from the stator
e. Clean the fan stator free from metal particles
f. Insulate the slot with 7/10 mil. thick millinex insulating paper
g. Wind the stator coil to the required number of turns with polyester based super-enamelled
copper conductor for both the starting/running windings with suitable gauge superior quality
winding wires confirming to Clause 11.3 .
h. Assemble the coil in the stator, uniformly insulated with cotton tape, plugging the gap between
the slot and the coil with fibber wedges wherever necessary.
i. Termination of end connections, insulation of the coil with superior quality air drying varnish
(Temperature Index: 130 degree C), baking etc. Air drying varnish used shall be conforming to
Clause No.11.4 .
j. Dry out the fan stator in the oven

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k. Re-assemble the fans with all their components
l. Testing & recording the winding resistance and insulation resistance values. Note: IR value shall
be minimum 50 Mega Ohms at normal room temperature. The fan shall be allowed to run
continuously with fan blades in position for 8 Hrs. Care shall be taken by the contractor to ensure
the winding temperature is not exceeding 45 degree centigrade above ambient, and the speed
shall not be less than the prescribed speed as given in the name plate.
m. After satisfactory operation, fans shall be transported to the site and installed in position as
directed by Engineer-in-Charge.
n. Required quantity of ball bearings will be supplied by the department free of cost wherever the
schedule says so, else will be measured separately as per the schedule item. Wherever required
the supply of bush bearing is in the scope of the contractor. The removed copper need not be
returned to department.
11.2 Rewinding of LT motors

The procedure to be followed by the contractor for this work is detailed below.
a. All the components required for completion of the job is in the scope of this item.
b. Dismantle the motor from the driven equipment and transport the same to the work spot
identified by the Engineer-in-Charge.
c. Dismantle the motor and remove the rotor from the yoke and offer the same for inspection.
d. If the coils are found burnt, the entire windings shall be removed from the assembly. Use of heat
to remove the old winding is strictly prohibited.
e. Relevant winding diagram shall be prepared and submitted for approval.
f. Provide insulation material to the required level (as in the original winding) in the stator slots and
wind it with polyester based super enamelled winding copper wire of correct size conforming to
the detailed specification as per Clause 11.3. The winding shall be made in the stator strictly as
per the approved winding diagram. The slot shall be plugged by Synthetic fibre wedges only and
paper wedges are not permitted. The window height of the coil shall be maintained uniform
throughout.
g. End termination, insulating with superior quality air drying varnish, baking etc. are in the scope of
this item. Air drying varnish used shall be conforming to Clause No.11.4and temperature index
of varnish shall be in line with the class of insulation of the original winding. The overlapping
portion of winding coil on both sides shall be applied with superior quality epoxy gel coat over the
varnish. (Mahindra & Mahindra make or equivalent).
h. Bearing shall be inspected for its healthiness and the same may be re-installed in the motor
assembly. In case bearing condition calls for replacement, this shall be changed. Required
quantity of ball bearings only will be supplied by the department free of cost wherever the
schedule says so, else will be measured separately as per the relevant schedule item.
Necessary bearing grease of suitable grade shall be supplied and applied to the bearings prior to
assembly.
i. After the completion of rewinding of motor, the motor shall be put to test and its performance is
checked. The following parameters shall be recorded during testing and the values shall confirm
to original condition.
j. Initial IR values and the winding resistance of the coils / complete winding shall be recorded after
the rewinding, prior to baking / varnishing / gel coating. The Contractor shall measure all
parameters such as IR values, coil resistance, no load current, condition of ball bearings, noise
Page 11 of 24
 level of motor (while running) after rewinding of motor. The final values shall be noted after the
complete assembly of the motor in the presence of Engineer-in-Charge or his authorised
representative.
k. Supply of required quantity of copper wire, varnish, insulating materials etc, end termination
materials such as insulators and copper terminal lugs, fibre glass wire from winding to terminal
block etc are in the scope of the contractor.
l. The material shall be purchased only from authorised stockiest / distributors nominated by the
manufacture. The scrap copper wire removed from the motor need not be returned to the
department and the scrap value of this shall be considered while quoting.
m. The motor shall be neatly painted with two coats of red oxide primer and two coats of synthetic
enamel gray / blue paint over the primer. (Minor repair work such as welding etc. shall be carried
out under this item to put the Motor back to service)
n. Test Checks: After successful re-winding, the contractor shall transport the motor to its original
location for installation and test it at load condition for the following tests. 1) Speed, 2) No load/
load current, 3) Noise level, 4) Vibration after allowing the motor to test run for 8 Hrs.
o. If any special maintenance work other than normally followed needed for the motor such as
dynamic balancing of rotor, bracing of broken rotor bars and other parts shall be carried out in
consultation with the Engineer-in-Charge and the cost incurred for the above special
maintenance will be reimbursed to the contractor on production of actual cash receipt
accompanied by the test certificate.
11.3 Specification for Polyester Enamelled Round Copper Wire, Class 130

a. The wire shall be conforming to is 13730 - part 13 and shall have a sole coating based on
Polyester resin, which may be modified providing it the chemical identity of the original resin and
meets Grade 2 Class 130 requirements i.e. minimum temperature index of 130 and a heat shock
temperature of at least 155°C.
b. The wires shall be made from electrolytic grade copper of 99.9% purity. The wire shall be of
uniform cross section throughout its length.
c. The wire should not fail within 2 minutes when tested for a cut through temperature of 240°C.
d. The wires shall be resistive to abrasion, solvents, transformer oil and refrigerants.
e. Preferred Make: HTP/HWP/Atlas/Jalan/Ceramic
11.4 Specification for Air Drying Varnishes

11.4.1 General

a. The insulating varnish shall have the property of quick drying. A thin film of varnish shall not
become tacky in less than 4 hours.
b. The flash point of the insulating varnish is required to be minimum of 23°C.
c. The varnish shall have excellent dilution ability i.e. minimum of 100%.
d. The varnish should not react with copper and the colour of copper should not change.
e. No cracking of varnish film shall be detectable by normal vision.
f. The varnish shall have an electric strength minimum of 35 kV/mm after immersion in water.
g. The varnish shall meet the minimum volume resistivity requirements of 1x1012 Ohm-Cm in air
and 1x108 Ohm-Cm after seven days of immersion in water.
Page 12 of 24
11.4.2 Air drying varnish with temperature index of 130°C

a. The insulating varnish shall have a temperature index of 130°C and it shall be in accordance to
IS 10026 part 3 Section 3
b. Preferred make: Dr. Beck, Insular insulating varnish VBR 1600 or equivalent.
11.4.3 Air drying varnish with temperature index of 155°C

a. The insulating varnish shall have a temperature index of 155°C and it shall be in accordance to
IS 10026 part 3 Section 6.
b. The varnish shall have the ability to cure in considerable thickness. It shall satisfy the limits “not
worse than S.1, U.1 and I 4.1 uniform” when tested according to clause 10 of IS 10026 part 2.
c. The varnish shall not get re-softened easily when tested according to clause 11 of IS 10026 part
2. The re-softening of varnish shall not be worse than ‘W.2’
d. When the varnish kept in an open vessel, it shall remain stable. The viscosity of the varnish shall
not be more than 3 times the original value. No skin formation, precipitation or gelled lumps shall
be found in the varnish.
e. The varnish shall be flexible even after heat ageing. No visible damage or detachment of the film
on convex side, on bending over a mandrel of diameter 4.75mm.
f. The varnish shall have an electric strength minimum of 35 kV/mm after immersion in water.
g. The bond strength co-efficient of the varnish shall be maximum of 1.3
h. Preferred make: Dr. Beck Elmotherm F 50or equivalent.
11.4.4 Specification for insulating thinner

a. The insulating thinner shall be suitable for use with air drying varnish class 130. It shall be free
from acid/ pungent odour. It shall not blacken or corrode clean metallic copper.
b. Preferred Make: Thinner No. 1600or equivalent.
11.4.5 Specification for fibre glass sleeves class H varnished

a. Flexible insulated fibre glass sleeve made of 'E' Class Fibre Glass Yarn and varnished with 'H'
Class Varnish is recommended for continuous use at 180°C. It shall have good thermal stability,
dielectric constant and resistance to moisture & chemicals. The wall thickness of sleeves shall
be 0.3 mm or more.
12 Replacement of components

a. Work is to be executed for indoor lighting system (in low bay & high bay areas), street lighting
system, motor feeders, kitchen electrical equipment etc. Under this item faulty accessories such
as lamps from 9 W to 400W, starters (110V/230V), ignitors, ballasts 9W to 1000 W, lamp
holders, starter holders, Tube light holder bracket single/twin type, contactors, bi-metal O/L
relays, plug & socket, LED Drivers, street light box etc or items as specified in the Schedule of
quantities shall be replaced as per the instruction of the Engineer-in-charge.
b. Wherever supply of components or accessories is included in the schedule, it shall be supplied
and replaced in place of faulty component. In case of replacement of accessories, the item
supplied shall be of same make and type as the original one being replaced.
c. Supply & Replacement of GI clamp: Galvanised Iron flats are used for fixing street light JBs to
street light poles. The GI flat shall be of cross section 25 x 3 mm and shall be shaped to suit the

Page 13 of 24
 pole cross section. A GI strip of same cross section shall be provided on the rear side of JB
connecting the 2 ends of shaped GI flat. 2 Nos. of 6 mm GI nut and bolt shall be supplied and
used to fix the JB to the clamp. The galvanisation thickness shall be minimum 80 micron. All the
materials required for completion of above work shall be arranged by the contractor. The
materials removed shall be handed over to Department and stored at a location identified by the
EIC.
13 Repair/Replacement of heater coils

a. The scope of work involves repair/servicing (including breakdown maintenance) of canteen

equipment such as Rice boilers, Idli boilers, Bain Marie heaters, Vanali, Hot plates, Dosa Tawa,
immersion heaters, water heaters etc. as directed by the Engineer-in-charge. It also includes
changing of heating elements as per schedule. Wherever supply of heater coil is not mentioned
it will be issued free of cost by the department.
b. The Contractor shall install & test water heater/geysers, immersion heaters in steam boilers etc.
It is to be noted that all the accessories required for fixing heater coils are in the scope of the
corresponding item. IR value of heater coil shall be checked before and after installation. In case
where supply is mentioned in the schedule the heater coil shall be supplied by the contractor
under this item. In other cases the heater coil will be issued free of cost by the department.
c. In case of servicing of heating equipment the scope include cleaning, tightening of connections,
repair of overheated terminations etc.
d. Wherever installation is involved contractor shall make their own arrangements for installation &
testing of water heater/geysers, immersion heaters in steam boilers, heater Coils etc including
supply of fixing accessories. Wherever Teflon Wire is required it will be provided as free issue
material by the department.
14 Overhauling & Servicing/Painting/Cleaning of fans & motors

14.1 Overhauling & Servicing/Painting of fans & motors

This item covers work on single phase fans/ single / three phase motors. All items required for
the completion of work shall be supplied by the contractor. The work shall be carried out as per
the following procedure:
a. Dismantle the fan or motor from the driven equipment and transport the same to the work spot
identified by the Engineer-in-Charge.
b. Check the continuity, IR value, windings resistance value and record the readings.
c. Dismantle the motor and remove the rotor and stator and offer the same for inspection.
d. Check all the coils for their healthiness.
e. For motors check the condition of the overhanging portion and insulation binding of coil. Tape
the overhanging portion of the winding wherever required with suitable type of insulation
materials.
f. Clean the stator and check wedges for any loose packing. If any wedge found loose, the same
may be replaced with new one and well packed.
g. Check the inter coil connection and termination.
h. Check the adequacy of insulation at terminal connections and strengthen the insulation if
required.
i. Check the tightness of end core laminations.

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j. Apply superior quality insulating varnish and allow it for air drying.
k. Apply epoxy gel coat over the windings as per the instructions of the epoxy manufacturer's
manual and as directed by the Engineer-in-Charge.
l. Check the insulation value by using 500 Volts insulation resistance tester and record the same,
before and after the Impregnation of coil with varnish / gel coat.
Rotor:

m. Inspect the rotor bars &end rings for any cracks / burning marks and check its healthiness.
n. Clean the rotor free from rust and apply clear insulating varnish on the surface.
o. Check the balancing counter weight for the rotor shaft and fan Hub balancing disc.
p. If anything found abnormal / faulty in the above inspection, the same shall be repaired and made
good.
Bearings:

q. Bearing shall be inspected for its healthiness and the same may be re-installed in the motor
assembly. In case condition needs replacement, this shall be changed. Required quantity of ball
bearings will be supplied by the department free of cost wherever the schedule says so, else will
be measured separately as per the relevant schedule item. In case of fans, if required, the
supply of bush bearing is in the scope of the contractor.
r. Necessary bearing grease of suitable grade shall be applied to the bearings prior to assembly.
Gun metal bearing shall be fixed properly so that it shall not produce excessive heat during its
life time operation.The inner bore of the gun metal bush shall be uniform throughout. The faulty
gun metal bearing / ball bearing removed shall be returned to department by the contractor.
Replace all the gasket, oil seals in the fan / motorat no extra cost.
Assembly and Testing:

s. Assemble the motor and check the air gap between stator and rotor and record the value for
future reference. Lubricant shall be applied wherever required, with superiorquality grease
conforming to IS 719: 1990. All terminal connections shall be checked for tightness.
t. Check the winding resistance and insulation resistance values and record the value. Motor shall
be dried by hot air blower. The motor shall be painted with two coats of metal primer and
enamel paint of shade light battleship Gray / Blue colour.
u. After the completion of overhauling of motor, the motor shall be put to test for 8 hours and
checked for its performance and the parameters such as IR values, coil resistance, no load
currents, noise, conditions of ball bearings etc The test results shall be recorded and submitted
to the EIC.
v. Transport the motor to its original location, install, align and couple the motor with load. In case
of fans after satisfactory completion of testing it shall be transported to the site and installed in
position. If the rubber bush in the fan hook is found damaged, required rubber bush for fixing the
ceiling fan shall be provided by the contractor free of cost.
w. NOTE: During overhauling the contractor shall take adequate care of the motor winding, bearing,
rotor shaft etc. If any physical damage occurred during overhauling, it is the responsibility of the
contractor to rectify the same.
x. For painting refer clause 3of this document unless & until specified in the SOQ.

Page 15 of 24
14.2 Cleaning of fans

a. The scope covers cleaning of ceiling / pedestal / wall mounted / air circulator fans fitted at
different heights. Consumables, tools and other materials required for completion of job shall be
arranged by the contractor. The fans and its blades shall be cleaned of its dust and dirt as
directed by the EIC. Wherever necessary the fan shall be brought down and installed back after
cleaning.
15 Attending to breakdown calls:

15.1 Attending minor breakdown calls

a. The scope covers attending breakdown maintenance of minor nature such as loose connection,
open circuit, short circuit, insulation breakdown, altering of connectionof cables etc and making
the system back to normal. All the consumables, tools and material required for attending the
breakdown maintenance shall be arranged by the contractor.
15.2 Attending to break down faults of Motors

a. The Contractor will be given information regarding the particulars of complaints of motors to be
attended on that day. Types of motors shall be as per the schedule. Detailed inspection shall be
carried out on the motor terminals, incoming / outgoing cable end termination on control gears
including checking of all contacts in the control gear for any loose connection of power / control
circuits, etc. and faulty components shall be replaced / repaired. While attending the fault on the
motor/switch gears, any spares required for the maintenance work will be issued by the
department at free of cost. However any consumable required like banian waste, fasteners,
bunching tape shall be supplied by the contractor under this item.
15.3 Attending to break down faults in various types of Ceiling/Exhaust/Pedestal/Wall
mounting /Air circulator Fans

a. The Contractor will be given information regarding the particulars of complaints of fans to be
attended on that day. The Contractor shall inspect fan terminals, condensers, switch, wiring
connection etc. While trouble shooting fault, care shall be taken to avoid disturbance to other
electrical connection, in the switch board / MCB DB and report to the Engineer-in-Charge about
the nature of fault and the action to be taken for the rectification. Spares required for the
maintenance work will be issued by the department free of cost. However any consumable
required like banian waste, fasteners, bunching tape shall be supplied by the contractor under
this item

16 Supply and installation / replacement of following components (motor maintenance)

16.1 Supply and installation of Electronic Regulator for ceiling fans as per scope of work

a. The scope of work under this item includes supply and replacement off an regulators (electronic
type) as per schedule suitable for the existing 230V, 50 Hz ceiling fans. Fan regulator already
available shall be removed and shall be replaced with new one with necessary fasteners.
Removal of existing wiring connection and reestablishment of connection to regulator shall be in
the scope of work. All the items required for the completion of work is included under this item.
The old regulator shall be handed over to sectional stores. Regulator shall be checked for
variable speed operation for minimum 2 minutes.
b. Preferred make: Crabtree or equivalent
16.2 Supply and installation of protective wire mesh for Fans.
Page 16 of 24
a. Metallic protective mesh guards for pedestal / wall mounting fans shall be supplied and installed
under this item. The type and size of the guard shall be as per schedule. In most cases existing
guard shall be removed and new one shall be installed. Guard slot gap shall vary between 3 and
12 mm and shall be made of 1 mm (approx) dia mild steel wires with anti corrosive coating. Clear
space between rotating fan blades and guard shall be 30 mm (approx) and overall width of
protective guard shall be 110 mm (approx). There shall be a locking arrangement to disengage
two halves of the guard.
16.3 Supply and replacement of blades for Exhaust / pedestal fans

a. The scope of this item is to replace the blades of Exhaust / pedestal fans. The required blades
and fasteners shall be provided by the Contractor. The Exhaust fans are installed at different
heights which shall be brought down for replacement of blades and reinstalled back at its original
position.

17 Maintenance of MCC/Transformer/Feeder pillar/ 4 or 2 pole HV outdoor

structures/DB/SFU/Starters etc.

a. The following safety points shall be confirmed before the commencement of work.
b. Corresponding incoming Feeder is Switched Off from the source end and ensure no other
backfeedings.
c. Line Clear from the Authorized person is obtained.
d. Proper Caution board is displayed on the switch/Breaker.
e. Discharge Rod is connected to the feeder.
17.1 Maintenanceon11 KV 4 pole / 2 pole Structure

a. The scope of this item includes the following:

b. Shifting of mobile telescopic ladder and other materials to spot of 4 pole/2 pole structures as
required.
c. Cleaning of all insulators with cleaning agent & dry cloths, checking the insulator for cracks, etc.
d. Tightening of all Jumper connections, Earth connections including that at Earth electrodes and
replacement of rusted bolts and nuts.
e. Replacement of broken / faulty support insulators/ Disc insulators.
f. Measurement of Earth pit Resistance
g. Measurement of insulation resistance
h. Vegetation growth shall be removed around the structure area as directed by EIC and it will be
measured separately as per applicable clause.
i. All the required materials will be issued free of cost by the Department.
17.2 Maintenance of PCC / MCC / LT Panels / Feeder Pillar/ EOT crane panel/SF Units

a. Scope of work involves preventive and breakdown maintenance of LT panels /Power Distribution
Centres/Motor Control Centres.
b. Physical inspection on the equipment under maintenance is to be carried out and if any
abnormality is seen, the same has to be intimated to the Engineer-in-charge immediately.

Page 17 of 24
c. The panel shall be cleaned thoroughly by using blower / waste cloth / cleaning agent etc. and all
accumulated dust particles shall be removed. All the required cleaning materials such as Waste
cloths, CTC/ Equivalent, Lubrication Oil shall be arranged by the contractor at their own cost.
d. Tightness of all power and control cables shall be checked and loose connections if any shall be
tightened.
e. Both the fixed /moving / fuse / power contacts of Switch gear units/ Contactors/ TPN switch fuse
units/ MCCB’s is to be cleaned with Toluene (liquid) or equivalent.
f. Measurement and recording Insulation Resistance Value of switch boards/Cables.
g. In case any thermal damage to cable / terminal is observed the same has to be rectified by
replacing the faulty jumper / re-termination of the cable as directed by the EIC.
h. In case of failure of any components such as contactor, fuse, indication lamp etc it shall be
replaced. Required components / accessories will be issued by the department as free issue
material.
i. In case of feeder pillars leak tightness of the enclosure shall be checked and in case of leakage,
corrective measures shall be taken as directed by the EIC. Three types of feeder pillars are
included namely Type A, B & C depending on the size in descending order.
j. Necessary tests / insulation resistance tests shall be conducted as directed by the EIC before &
after the maintenance and the results shall be recorded & submitted to the EIC.
17.3 Maintenance of Power & Lighting DBs

a. Power and lighting Distribution Boards are of different sizes and types which include MCB type &
HRC Fuse type. The DBs are either embedded or surface mounted. To complete the
maintenance, after mandatory isolation following activities shall be carried out:
b. Cleaning the internal & external surfaces of the DB and the components in the DB.
c. Tightening of earth connections, cable terminals in fuse switch units, DB’s, bus bar terminals in
DB’s, terminals in fuses / MCCB, neutral bus connections, etc.
d. Removing of damaged components if any and replacing with new components. Required
components will be supplied free of cost by the Dept.
e. After cleaning and tightening of power contacts, a thin layer of Petroleum jelly shall be applied on
that.
f. DB circuit details (SLD) shall be updated as per the latest load details and whichshall be printed
in the approved format & pasted inside the DB as directed by the EIC.
g. All the required cleaning materials such as Waste clothes, cleaning agents like CRC, Lubrication
Oil / grease, Petroleum jelly shall be arranged by the contractor at their own cost.
h. Before and after completion of maintenance necessary insulation resistance test shall be
conducted as directed by the Engineer-in-Charge.
18 Maintenance of Distribution/Power transformer

a. Distribution/Power transformers are installed at various locations indoor as well as outdoor.

Scope of the work under various categories of maintenance is detailed under the sub headings
below:
18.1 Annual maintenance on Distribution transformer of capacity500 kVA to 7 MVA

a. Necessary line clear permit shall be obtained.

Page 18 of 24
b. Opening of cable end box cover (Applicable for transformers connected with power cables and
which is not required for transformers with OH line connections)
c. Cleaning of Bushings with CRC spray as recommended by EIC and checking for cracks as
directed by the EIC.
d. Disconnection of Neutral and power cable terminations.
e. Shifting of testing equipment and other accessories issued by the Department and arranging
Power supply for testing.
f. Measurement of IR Value for all the windings of the Transformer with respect to ground and
between the windings
g. Re-termination of power cables and neutral link etc. based on the requirement,to bring back the
transformer to the original condition.
h. Cleaning of Marshalling Box of the transformer. Checking the wiring tightness, insulation
resistance test on control circuitry etc.
i. Checking for proper operation of protective devices such as Bucholz Relay, MOG, Wdg / Oil
Temperature indicators, PRV/ Condition of Explosion Vent and its connection in the control
circuitry. Attending to control circuit defects if any.
j. Winding resistance of all the windings of the transformer shall be measured with Kelvin's bridge /
Low Resistance Kit, after making necessary disconnections. The connection shall be restored
after the work.
k. Providing Assistance for Testing of Over Current and Earth fault Relays (Numerical / Electro
mechanical), Auxiliary Relays.
l. Shifting of required quantity of Transformer oil to the spot, topping up in conservator and shifting
back old oil to the storage place.
m. Opening the Disconnecting Chamber, Removal/Connection of Links & Heat shrinkable sleeves,
cleaning the chamber, Links, Sleeves, Filling it with new oil and closing back the chamber with
new gaskets wherever required.
n. Collection of oil sample from the top & bottom of the transformer and test for BDV
o. Free issue items to contractor for this work: - Transformer Oil, CRC, Bolts & nuts, diaphragm of
explosion vent. All other tools and consumables required for completion of the work shall be
arranged by the contractor.
18.2 Half yearly maintenance on Distribution transformer of capacity 500 kVA to 7 MVA

a. Under this item all activities in clause 18.1except sr. no. k. shall be carried out. Free issue items
are the same as provided in this clause.
18.3 Annual maintenance on Power transformer of capacity above 7MVA and upto 20 MVA.

a. Under this item all activities in clause 18.1shall be carried out. In addition to that the following
activities also are required to be done under this item. Free issue items are the same as that
provided in this clause
b. Test Running of Cooler Fans & checking for abnormalities & attending to minor defects if any.
c. Testing of Operation of mulsyfire system as per the requirement and as directed by Engineer-in-
charge.

Page 19 of 24
d. Free issue items to contractor for this work: Transformer Oil, CRC, Bolts & nuts etc.All other
tools and consumables required for completion of the work shall be arranged by the contractor.
18.4 Half yearly maintenance on Power transformer of capacity above 7MVAand upto 20
MVA.

a. Under this item all activities in clause 18.1except sr. no. k. shall be carried out. In addition to that
the following activity also are required to be done under this item. Free issue items are the same
as provided in this clause.
b. Test Running of Cooler Fans & checking for abnormalities & attending to minor defects if any.
19 Removal of equipment

Following points are applicable under this item:

a. Items such as MS boxes, switch boxes, GI / PVC conduits, Fans etc. are to be removed carefully
from the installed location, transported and handed over to sectional stores after cleaning.
Damage to the items are not acceptable.
b. MS boxes or switch boxes are either surface mounted or installed on panels externally /
internally.
c. GI or PVC conduits are surface mounted with the help of spacer and clamps. Removal includes
removal and handing over of associated spacer and clamps as well.
d. Types of fans include ceiling, wall mounted, exhaust, air circulators etc installed at various
heights.
e. After removal the opening caused shall be covered with hylem sheet / GI sheet which will be
issued by department.
20 Oil filtration/testing/ Breather /Recording reading

20.1 Operation of Transformer Oil Filtration plant

a. Transformer oil Filtration Plant provided by the department shall be operated as directed by the
EIC to recondition the Transformer oil in Transformers/ Drums / Storage tank.
b. The Filtration process shall be carried out continuously by arranging minimum of three persons
for each shift. The filtration shall be continued till the expected IR value / BDV is attained. The
contractor shall depute a separate crew for each shift to continue the filtration.
c. Plant tyres shall be checked for air level and if required air can be filled. Shifting of filtration plant
along with accessories like oil hoses, cable for power supply, oil drum etc to the work site.
d. Necessary hose connection, power supply connection, earth connection, cleaning of the plant,
minor repair / replacement of components, etc. and other works necessary for the operation of
the plant shall be done.
e. Periodical measurement of IR value of Transformer, testing of BDV of oil samples, running plant
measurements like temperature, Pressure/Vacuum, oil flow speed etc shall be done as
instructed by EIC.
f. Measurement for this item will be done in hours of operation of filtration plant.
20.2 Recording of Hourly Reading of Electrical Parameters

a. Recording of electrical parameters like Voltage, Current, Frequency, Power, Power factor, etc. of
33kV / 11kV / 6.6kV / 415V system switch board for testing / analysis purposes.

Page 20 of 24
b. For this work, the contractor shall depute a qualified electrician having “B” Electrical license and
reading shall be recorded for every half an hour / hourly as directed by the Engineer-in-Charge.
c. Necessary register for recording the parameters will be provided by the Department free of cost.
20.3 BDV Test for Transformer oil

a. Under this item transformer oil samples are to be collected in glass bottles as per the approved
procedure. The bottle used shall be cleaned thoroughly and dried. Before taking the sample the
bottle shall be rinsed with the oil from transformer. Oil to be collected without formation of air
bubbles.
b. Oil sample to be tested for Break Down Voltage as directed by the EIC using the test kit provided
by the dept free of cost. The readings are to be tabulated and submitted to the EIC.
21 Installation/Removal/Replacement of different type of light fixtures

a. The work shall be carried out in indoor low bay/ high bay and outdoor areas. Areas and type of
light fixtures shall be as per the schedule. In case of installation or replacement, the light fixtures
will be issued by the department as free issue material. Necessary fasteners shall be provided
by the contractor. The accessories like ball and socket, junction boxes, down rods if any required
for completion of installation shall be in the scope of the contractor. After installation the
luminaire shall be tested for satisfactory performance.
b. In case of removal, disconnection of supply, removal of lighting fixtures, disconnection and
removal of temporary cable if any and shifting the cable and light fixtures to sectional stores.

c. The light fixtures shall be removed after proper isolation is made.

d. Temporary cables if any laid for these fixtures shall also be disconnected and shifted to sectional
stores as directed by the Engineer-in-Charge.

e. In case of removal of Flood light/Street light/PTL fixtures ladder required for fixing the light fixture
shall be shifted by the contractor to the work site and shifted to ESG after the completion of
work.
22 Attending to Fuse off calls in various lab/buildings

a. This item covers building lighting, small power & telephone systems as specified in the
Schedule. Contract supervisor shall collect the Fuse Off call details from the Engineer-in-Charge
every morning. The contractor shall depute sufficient teams regularly to attend day to day faults
in the lighting or power installations in various labs/buildings including high bays. A record shall
be maintained with details of faults attended, including lab/building name, room number, circuit
number with date. The fault shall be cleared with minimum down period without any disturbance
to other electric circuits in the MCB DB. Any emergency calls arising during any time of the day
will be communicated to the contract supervisor and it shall be attended on priority. The
components removed shall be returned to the Sectional stores. All the components / accessories
will be provided by the Department at free of cost unless otherwise specified in the schedule. All
necessary items like bunching tape, fasteners required etc shall be supplied by the contractor.
23 Temporary installation of Flood light fixtures

b. The scope includes shifting of flood light fixtures from sectional stores, fixing, temporary cable
laying and providing connection.
c. The light fixtures shall be shifted from sectional stores safely to the site and shall be fixed as
directed by the Engineer-in-Charge. Necessary fasteners shall be arranged by the contractor.

Page 21 of 24
d. Street light ladder required for fixing the light fixture shall be shifted by the contractor to the work
site and shifted to ESG after the completion of work.
e. After light fixtures are fixed, temporary cable (approx 30 mtrs) shall be laid from the nearest
power point/ St light JB and connection shall be provided as directed by the EIC. The cable will
be provided by the department free of cost.
24 Inspection and testing of various electrical equipment/ components

a. Various electrical items received at central stores or sectional stores are to be inspected & tested
for satisfactory performance. The items include fans of various types as specified in schedule,
motors of different capacities, light fittings/lamps/ballast/ignitors/starters, switch boxes etc. The
activity shall be planned in such a way that the time spent in stores is minimum. Power supply
shall be derived from the nearest power point by the contractor which will not be charged.
Generally items picked up at random will only be tested and the testing has to be conducted as
per the instruction of Engineer-in-charge. The scope of work also includes counting of received
materials. Damages/ short supply noticed during the inspection shall be brought to the notice of
Engineer-in-charge. The materials tested shall be repacked and stacked neatly.
b. The scope is not only restricted to inspection & testing at central / sectional stores but also at
labs / General office areas.

25 Maintenance of service connection

The scope of work includes the following (For details about Service Connection, please refer
Clause 28):
a. Checking the tightness of all power and control cable connections as well as earthing
connections. These include power and control cable terminals, energy meter connection, CT
wiring, outgoing Cable terminals, ELCB connection, earthing wire connection etc.
b. If the existing energy meter is faulty the same shall be removed and replaced with new energy
meter. Department will issue the meter free of cost. Other hard wares/ fasteners required for
fixing the meter shall be in the scope of the contractor
c. Service connection box shall be painted with 1 coat of enamel paint. One coat of red oxide shall
be applied wherever the surface is found to be rusted after removing the rust. For painting
procedure to be followed as per clause3for painting of feeder pillars.
26 Cleaning of Cable Trenches

a. The power cables laid through Cable trenches in various buildings or substations shall be
cleaned of dirt and unwanted materials as directed by the Engineer-in-charge. Minor
maintenance works such as replacement of corroded bolts and nuts are also included under this
item including supply of bolts & nuts.
b. The cable trenches are covered mostly with MS chequered plates and sometimes by RCC slab.
The cover plate/slab shall be properly identified and removed before the start of cleaning work.
The removed covers shall be neatly stacked. After completion of the cleaning the covers shall be
restored to the original position or as directed by the Engineer-in-Charge.
c. Cable trenches are of different cross sections, starting from 500 x 500 mm to 1500 x 1500 mm.
Measurement will be done in running meter basis.
d. Water stagnation if any found shall be dewatered. Dewatering pump will be provided by
department. Power supply for the pumping purpose shall be extended from the nearest point.

Page 22 of 24
e. All items except dewatering pump (ifrequired) for cleaning trench/tunnel shall be arranged by the
contractor.
27 Disconnection of service connection

a. The scope of work includes disconnection of service connection meter board, removing of
cables, energy meter etc. The disconnected items shall be safely transported to storage area
identified by the Engineer- in- Charge within a distance of 10kM.
b. The terminal point of the cable shall be covered as directed by EIC to avoid ingress of water/dirt.
c. The cable to service connection board may be in built in trench/ open laying / buried in ground.
The contractor shall safely retrieve the cables for further use. Excavation required for this work
will be measured separately. The items obtained during process of retrieval ie. Bricks,clamps,
bolts if any shall be handed over to sectional stores.
28 Collecting and shifting of scrap items

a. Collecting and shifting of scrap items within a specified distance as per the schedule.
Measurement will be done on volume basis or as specified in the schedule.
b. Scrap items of various materials including plastics, metals, cables, paper etc are to be collected
from multiple locations and transported to a place identified by the Engineer-in-Charge. The lead
distance shall be as specified in the BOQ.
c. Sorting of items shall be done during collection. Items shall be separated & sorted in to usable or
unusable items. Usable scrap items shall be weighed on Weigh Bridge inside the campus and
transported to stores. Other items shall be transported to dump yard identified by the Engineer-
in-Charge.
d. The scope covers hiring material handling equipment like crane/truck for transportation.
29 Providing Service connection

a. Service connections are extended to meet the construction power requirements. It will generally
be metered. One No. free standing service connection board with energy meter, cable
termination facilities, fuses/MCB, earth wire etc will be issued to the contractor. This has to be
transported and installed at the required location which can be indoor or outdoor. Steps involved
are listed below:
b. Transportation, Installation of free standing Service Connection board (Energy Meter Board),
power cables (Length up to 30 Mtrs and of size up to 3.5C x 70 Sq. mm), earthing conductors,
etc.
c. Levelling of floor for proper installation and providing adequate supports required for installation
of boards are in the scope of the work.
d. Providing double earth to Service Connection board using earthing conductor.
e. Installation of cables (Length up to 30 Mtrs and of size up to 3.5C x 70 Sq. mm) and termination
of cables on both ends namely supply point and Energy Meter board. Installation of cable shall
be carried out as per the procedure given for temporary cable laying under Clause 30. If the
length of cable laid exceeds the limit of 30 m, it will be measured separately under temporary
cable laying. Termination of cables will be measured separately.
f. After completion of installation work the Service Connection board shall be tested, meter details
& initial readings recorded as directed by the Engineer-in-Charge and energise the board.
30 Temporary Laying of Cables

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a. The scope of work includes transportation of cables from Central stores/CWCP cable yard
checking the healthiness of cable, shifting the required quantity of cable from cable yard to work
site, unwinding (undue axial pulling force should not be exerted on the cables), Laying in open
air for providing temporary power supply to various construction sites as instructed by the
Engineer-in- Charge. The cables shall not be laid on the ground and shall be firmly tied to
wooden / metal supporting poles at regular intervals such that temporary cable shall not create
any obstruction to personal/ Material/Vehicle movement. Wherever structures are available it can
be used for fastening the cables with the approval of Engineer-in-Charge. The contractor shall
make their own arrangement for supporting poles.
b. Whenever the temporary cables are laid in built-in trenches, the contractor shall lay the cables in
the cable tray where cable density is less and shall fasten the cables with the tray by cable ties
or as directed by the EIC.
c. Cables will be provided by the Department Free of cost.
d. End termination of the cable will be measured separately
31 Shifting of equipment

a. Equipment identified by Engineer-in-Charge shall be transported to the designated location.

Schedule is classified based on the size of equipment. Smaller items weighing less than 100 kgs
will be clubbed and measured as 1 No, for combined weight between 100 and 150 kg whichever
is lower. Distance to be shifted shall be as per schedule of quantities. Measurement will be done
on number basis. All care shall be taken to avoid any damage to the equipment.
b. In case of transformer oil filtration machine trailer arrangement shall be made for shifting. Hiring
of crane, truck etc. shall be arranged by the contractor. Contractor shall ensure sling of adequate
capacity is used while handling heavy equipment and follow safe practices while shifting any
them.
c. Shifting of electrical / telephone items from IGCAR and hand over to service centres (upto Chennai
limit) or vice versa:-

• One Number trip includes both onward & return journey.

• Scope includes loading, unloading, safe packing, collection of service note/ receipt and
verification of model no. / items etc as directed by EIC.

32 Shifting of cable drums

a. The scope includes transportation of empty/partially loaded cable drums of various sizes within a
distance as given in the schedule. For short distances rolling of drums will be permitted based on
the condition of drum. Care shall be taken not to damage the roads/pathways while rolling the
drums. In case the drums are not fit for rolling, crane/truck shall be arranged by the contractor for
shifting. All safety procedures shall be followed while handling the cable drums.

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