Document reference NPS/ 001 /003

Version: - 3.2 Date of Issue: - April 2011 Page 1 of 23

NPS/001/003 – Technical Specification for

11kV, 20kV and 33kV Overhead Line Air
Break Switch-Disconnectors
1. Purpose
This document details the requirements for all 11kV, 20kV and 33kV air break switch disconnectors operating
on the overhead line distribution network of Northern Powergrid.

This document supersedes the following documents, all copies of which should be destroyed.
Ref Version Title

NPS/001/003 2.0 Technical Specification for Overhead

Line Air Break Switch-Disconnectors

2. Scope
This specification details the produce range, design, constructional and technical requirements for air break
switch disconnectors for 11kV, 20kV and 33kV overhead lines. Northern Powergrid currently has a preference
for a single design of disconnector that is suitable for use on both the 11kV and 20kV systems, however
consideration will be given to individual 11kV and 20kV units.

The main features of the products detailed in this specification are: -

 Rod operated, high level, hook stick mechanism requiring two step operation with a third step to
apply a mechanical safety lock flap
 Independent manually operated (Category 0 as defined in Energy Network Association
Engineering Recommendation G18, clause 1)
 Under-slung single or H pole mounted
 Composite silicon post insulators

Technical documents referenced within this specification refer to the latest versions of the relevant
International Standards, British Standard Specifications and all relevant Energy Networks Association
Technical Specifications (ENA TS) current at the time of supply.

This specification also includes a requirement for suppliers to provide periodic inspection and maintenance
information.

The following appendices form part of this technical specification: -

Appendix 1 – Technical Schedules

Appendix 2 – Self Certification Conformance Declaration

Appendix 3 – Addendum to Supplier Requirements

Appendix 4 – Maintenance and Inspection Requirements

Appendix 5 – Information Return Check List

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2.1 Contents

1. Purpose ...................................................................................................................................................................... 1
2. Scope ......................................................................................................................................................................... 1
2.1 Contents ............................................................................................................................................................... 2
3. Technical Requirements ............................................................................................................................................ 3
3.1 General Requirements ......................................................................................................................................... 3
3.2 Technical Requirements ...................................................................................................................................... 3
3.2.1 Switch Disconnector Category .................................................................................................................... 3
3.2.2 Equipment Ratings ...................................................................................................................................... 3
3.2.3 Cable and Line Charging Currents .............................................................................................................. 3
3.2.4 Special Service Conditions .......................................................................................................................... 4
3.2.5 Hook Stick Mechanisms............................................................................................................................... 4
3.2.6 Insulators ..................................................................................................................................................... 4
3.2.7 Mode of operation ........................................................................................................................................ 4
3.2.8 Contacts ....................................................................................................................................................... 4
3.2.9 Leads ........................................................................................................................................................... 5
3.2.10 Connections ................................................................................................................................................. 5
3.2.11 Nuts, Bolts and Studs .................................................................................................................................. 5
3.2.12 Mounting ...................................................................................................................................................... 5
3.2.13 Labelling ....................................................................................................................................................... 5
3.3 Testing ................................................................................................................................................................... 5
4. References ........................................................................................................................................................... 6
4.1 External Documentation ....................................................................................................................................... 6
4.2 Internal documentation ......................................................................................................................................... 6
4.3 Amendments from Previous Version .................................................................................................................... 6
5. Definitions ............................................................................................................................................................. 7
6. Authority for issue................................................................................................................................................. 8
6.1 Author ................................................................................................................................................................... 8
6.2 Technical Assurance ............................................................................................................................................ 8
6.3 DBD Assurance .................................................................................................................................................... 8
6.4 Authorisation ........................................................................................................................................................ 8

Appendix 1 - Technical Schedules .................................................................................................................................... 9

Appendix 2 - Self Certification Conformance Declaration. .............................................................................................. 10
Appendix 3 - Addendum to Supplier Requirement .......................................................................................................... 21
Appendix 4 - Pre-commissioning testing, Routine Inspection and maintenance requirements ...................................... 22
Appendix 5 - Information Return Check List ................................................................................................................... 23
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3. Technical Requirements

3.1 General Requirements

Air break switch disconnectors shall comply with Energy Networks Association Technical Specification (ENATS)
41-36 Issue 2: 2004 and Energy Networks Association Engineering Recommendation G18 Issue 2: 2008.The
disconnector shall comprise of a three phase, rocking head, gang operated load break switch with three
insulators per phase. The kit shall include an operating rod and mechanism to allow operation via a hook stick
(see clause 3.2.5).

The equipment shall be suitable for operating under the conditions specified and shall withstand the variations of
temperature and atmospheric conditions without undue distortion or deterioration.

3.2 Technical Requirements

3.2.1 Switch Disconnector Category
Switches supplied under this specification shall be in accordance with (Category 0) as defined in ENA ER G18;
2008, clause 1 or (Category B) as defined in ENA TS 41-36 part 6

3.2.2 Equipment Ratings

The equipment is required for use on three-phase, 50Hz, 11kV, 20kV or 33kV nominal supply systems with the
neutral earthed directly.

Rated Voltage (kV) 12 24 36

Rated Insulation Level (kV-peak value)

Lightning Impulse Withstand Voltage
Common Value 110 150 200
Across the isolating distance 125 165 220

1 Minute Power Frequency Wet Withstand Voltage

(kV rms Value) Common Value 45 60 80
across the isolating distance 50 66 88

1 Minute Power Frequency Dry Withstand Voltage

(kV rms Value) 50 70 95
Common Value 55 77 105
Across the isolating distance
Rated Normal Current (A) 400 400 400

3 Second Short-time withstand Current (kA) 12.5 12.5 12.5

Short Circuit Making withstand current (kA)
Independent Manual (Category 0) 16 (40Pk) 20 (50Pk) 10 (25Pk)

Rated Load Breaking Current (A) 630 630 630

3.2.3 Cable and Line Charging Currents

The rated cable and line charging current values for air break switch disconnectors shall comply with those
specified in table 6.1 of ENA TS 41-36 Issue 2.
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3.2.4 Special Service Conditions

Switches shall be designed to operate normally whilst being coated with a minimum of 10mm of ice as required
by Clause 6.2 of ENA TS 41-36 Issue 2. It shall also be suitable for use in coastal areas with high salt air
pollution.

3.2.5 Hook Stick Mechanisms

It shall be possible to mount the operating mechanism for the switch at a fixed height of 4.3m from
ground level, irrespective of the actual pole height and switch mounting position. The pole diameter at
this height ranges between 250mm and 450mm. The mechanism shall have an automatic latching pin,
which is virtually friction free. The mechanism shall be designed to be suitable for operation from
ground level by the use of standard portable insulated operating rods.

There must be at least two distinct operations to open or close the switch. The lever shall incorporate
an anti-reflex device to prevent reverse movement of the operation rod, operating the equipment. It
should be designed for ease of operation, under all service conditions, e.g. severe weather.

Additionally the switch mechanism shall incorporate a “Safety Lock Feature”. The safety lock shall
consist of an interlock or additional lever that when applied prevents the switch from being moved
from the open position to the closed position. The lever or interlock shall incorporate a label that
becomes visible from ground level when the safety lock is applied. The label shall be white lettering on
a red background with the words “SAFETY LOCK”.

3.2.6 Insulators
The support insulators shall be manufactured in accordance with ENA TS 43-93 and IEC 61109 and shall be
of the composite silicone type. All insulators shall provide minimum creepage levels of 25mm/kV as detailed
for IEC 60815 class 3. They may be of either cylindrical post type or the pedestal post type.

The composite material shall meet the requirements of clause 3.2.1.2 of NPS/001/006 - Technical
Specification for Insulators for Overhead Lines up to and including 132kV.

3.2.7 Mode of operation

Switches shall of the independent manual type and provide the values of rated short-circuit making current as
detailed in table 3.2.3 ‘Equipment Ratings’.

The switch shall be fully compliant with the requirements for independent manual operation units detailed in
clause 1.5.7.1 of ENA TS 41-36 Issue 2.

3.2.8 Contacts
The main fixed and moving contacts shall be self-aligning and shall be manufactured from a suitable high
conductivity material.

Where spring loaded devices are used to maintain main contact pressure, they shall be manufactured from
corrosion resistant materials which are compatible with the contact. Where separate springs are used, these
should not form part of the current carrying circuit. Shrouds may be used as necessary to maintain spring action
under ice conditions but they must not act as a trap for moisture or inhibit free air circulation.

In addition to the “over-toggle” mechanism, there should be positive stops in both the closed and open positions,
which are independent of the contacts.

The minimum isolating distance across an open switch shall be 300mm for 11kV and 430mm for 20kV and 33kV
and this gap shall be clearly visible from ground level.
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3.2.9 Leads
Any flexible leads which form the main current carrying path shall be of multi-strand, high conductivity annealed
copper conductors or laminations of high conductivity strip to BS EN 13599 - 2002. They shall preferably be
covered for long term protection against abrasion and corrosion. Applied coverings shall fully seal the leads to
prevent moisture ingress; however it shall not reduce the flexibility of the lead.

The leads, terminations and supporting apparatus shall be so arranged and connected to provide mechanical
stress relief at the connections. Leads shall be either supported, or so designed to provide adequate clearance
between groups of leads and moving parts of the switch and to result in minimum wear of both the leads and
their coverings.

Compression lugs shall be manufactured from high conductivity electrolytic copper and generally be in
accordance with ENA TS 43-92.

3.2.10 Connections
The connections shall be double hole tinned copper NEMA lug 41mm centres (Figure 4 of ENA TS 41-16).

3.2.11 Nuts, Bolts and Studs

All nuts and pins shall be locked in position with locknuts, or lock washers, or other suitable devices unless the
omission is proved for the application.

All bolts, nuts and washers shall be of non-rusting material and where dissimilar materials are in contact,
consideration shall be given to any interactive processes between them. Where electrical connections are
involved brass bolts, nuts and washers with a phosphor bronze spring washer shall be used.

All bolts or studs shall project through the nut. Projections exceeding four threads shall be avoided.

The components used in the disconnector will be of standard design such that no special spanners or tools shall
be required.

All mounting and connecting bolts, nuts, washer’s etc. to be provided except pole bolts.

3.2.12 Mounting
The switch shall be suitable for mounting on both single and H type poles at a distance approximately 2700mm
from the pole top.

Manufactures shall provide an option for the supply of common mounting steelwork to accommodate the various
mounting options listed above.

All ferrous materials shall be hot dip galvanised in accordance with BS EN 1461 after fabrication.

It shall be possible to offset 2 units to either side of the pole.

3.2.13 Labelling
In addition to the rating plate on the operating mechanisms, the manufacturer shall provide a duplicate rating
plate for each switch unit and a plate that can be fixed to the pole at ground level. Labelling shall include the
information detailed in IEC 62271-102 Table 4 together with the rated short-circuit making current.

3.3 Testing
All units shall have been subjected to the type tests detailed in Clause 6.6 of ENA TS 41-36 and the routine tests
in Clause 6.7 of ENA TS 41-36 Issue 2. Appendix 2 contains self certification conformance declarations.
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4. References

4.1 External Documentation

The products described within this specification shall comply with the latest versions of the relevant
International Standards, British Standard Specifications and all relevant Energy Networks Association
Technical Documentation current at the time of supply
Reference Title
ENA TS 41-36 Issue 2: Distribution Switchgear for Service up to 36kV (cable and overhead
2004 conductor connected)

ENA TS 41-16: 1981 Apparatus Terminations, Conductor Sizes and Associated Fittings
(Copper) used in Indoor and Outdoor Substations with Outdoor
Equipment

ENA TS 43-92: 1985 Technical Specification for Overhead Line Connectors

ENA TS 43-93: 2004 Technical Specification for Overhead Line Insulators

ENA ER G18 Issue 2: Operation of Air Break, Isolating Switches - Recommendations

2008
BS EN 13599: 2002 Copper and copper alloys. Copper plate, sheet and strip for electrical
purposes

BS EN 12163: 1998 Copper and copper alloys. Rod for general purposes

BS EN 1461: 2009 Hot dip galvanized coatings on fabricated iron and steel articles.
Specifications and test methods

IEC 60815: 1996 Guide for the Selection of Insulators in Respect of Polluted Conditions-
Edition 1.0

IEC 62271 – 102: 2002 Standards for high-voltage switchgear and control gear

4.2 Internal documentation

Reference Title

4.3 Amendments from Previous Version

Clause Subject Amendments

2.1 Contents Section added

Appendix 1 Technical Schedule Appendix added

Appendix 3 Addendum to Supplier Requirements Appendix added

Pre-commissioning testing, routine
Appendix 4 Appendix added
inspection and maintenance requirements
Appendix 5 Information Return Check List Appendix added
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5. Definitions
Term Definition
BS British Standard
ENA TS Energy Networks Association Technical Specification
ENA ER Energy Networks Association Engineering
Recommendation
Category 0 Category 0 - ABSDs fitted with a mechanism other than
dependent manual or dependent power, and fitted with
a self-contained arc extinguishing device (‘interrupter
heads’)
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6. Authority for issue

6.1 Author
I sign to confirm that I have completed and checked this document and I am satisfied with its content and
submit it for approval and authorisation.
Sign Date

S Salkeld Standards Engineer S Salkeld 08/04/2011

6.2 Technical Assurance

I sign to confirm that I am satisfied with all aspects of the content and preparation of this document and submit
it for approval and authorisation.

Sign Date
Overhead Line Standards
G Hammel G Hammel 08/04/11
Manager

6.3 DBD Assurance

I sign to confirm that this document has been assured for issue on to the DBD system

Sign Date

S Johnson DBD Administrator S Johnson 14/04/11

6.4 Authorisation
Authorisation is granted for publication of this document

Sign Date
Standards and Assessment
C Holdsworth C Holdsworth 08/04/11
Manager
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Appendix 1 - Technical Schedules

Northern
Powergrid.
Requirements
Commodity
Code
11/20kV, Air Break Switch Disconnector, with High Level Independent Manual
Operating Lever, to Drawing Number 1.09.147.1525 Sheet 7 245587

33kV, Air Break Switch Disconnector, with High Level Independent Manual
Operating Lever, to Drawing Number 1.09.147.1525 Sheet 7 245586

Air Break Switch Disconnector Retro-Fit Shoot Bolt Mechanism - for upgrading units
with a 12mm pin 245590
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Appendix 2 – Self Certification Conformance Declaration.

Overhead Conductor Connected Air-Break Switch-Disconnectors.

CLAUSE BY CLAUSE CONFORMANCE WITH ENATS 41-36, PART 6- OVERHEAD CONDUCTOR CONNECTED AIR-BREAK SWITCH
DISCONNECTORS,

Switchgear covered by ENATS 41-36 shall comply with the latest issues of the relevant International and British Standards. ENATS 41-36 is
intended to amplify and/or clarify the requirements of those Standards.

This check sheet identifies the clauses in ENATS 41-36 - Part 6 and the clauses of the aforementioned Standards relevant to overhead conductor
connected air-break switch-disconnectors. The manufacturer shall declare conformance or otherwise, clause by clause, using the following levels
of conformance declaration codes.

N/A = Clause is not applicable/appropriate to the product Instructions for completion

Cs1 = The test conforms fully with the requirements of this clause When Cs1 code is entered no remark is necessary
Cs2 = The test conforms partially with the requirements of this clause  When any other code is entered the reason for
Cs3 = The test does not conform to the requirements of this clause
Cs4 = Test not performed, but alternative evidence/ technical case offered non-conformance shall be entered
 Prefix each remark with the relevant ‘IEC’ or
Note - One complete set shall be completed for each ‘ENATS’ as appropriate
variant offered.

Manufacturer: Product Ratings:

Reference:

Name: Signature: Date:

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IEC 62271-102, IEC 60265:Part 1 ENATS 41-36 Part 6

Clause / Sub-clause Requirement Confor ENATS 41- Requirement Confor
IEC 62271- IEC 60265: - 36 - Part 1 - Remarks
102 PART 1 mance Clause / mance
code Sub- code
clause
1 1 General 6.1 General
6.1 Class M0 (IEC 62271-
102)
6.1 Class E0 (IEC62271-102)
6.1 Ganged
2 2 Normal and special 6.2 Normal and special
service conditions service conditions
Class 10 ice
3 Definitions 6.3 Definitions
6.3.3 Switch-disconnector
(Cat B)
4 4 Ratings 6.4 Ratings
4.101 6.4.101 Rated mainly active load
breaking current
4.102 6.4..102 Rated closed-loop
breaking current
4.103 6.4.103 Rated no-load
transformer breaking
current
4.104 6.4.104 Rated cable-charge
breaking current
4.105 6.4.105 Rated line-charging
breaking current
4.106 Rated values of 6.4.106 Rated values of
mechanical mechanical endurance for
endurance for disconnectors
disconnectors 6.4.106 Class M0 – 1000 ops
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Clause / Sub-clause Requirement Confor ENATS 41- Requirement Confor

IEC 62271- IEC 60265: - 36 - Part 1 - Remarks
102 PART 1 mance Clause / mance
code Sub- code
clause
IEC 62271-102, IEC 60265:Part 1 ENATS 41-36 Part 6
4.107 Rated values of electrical 6.4.107 Rated values of electrical
endurance for earthing endurance for earthing
switches switches
6.4.107 Class E0
4.101 4.112 Rated short-circuit 6.4.112 Rated short-circuit
making current making current for air-
break switch
disconnectors
6.4.112 Table 6.2
6.4.112 4.101 of IEC 62271-102
for earthing switches
4.113 Rated breaking and 6.4.113 Rated breaking and
making currents for a making currents for a
general purpose switch general purpose switch
6.4.113 Class E1 ( IEC 60265 )
5 5 Design and construction 6.5 Design and construction
5.3 5.3 Earthing 6.5.3 Earthing
5.5 5.5 Dependent power 6.5.5 Dependent power
operation operation and dependent
manual operation
6.5.5.1 a) Anti reflex
6.5.5.1 b) Tension for
close/open
Anti reflex
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IEC 62271-102, IEC 60265:Part 1 ENATS 41-36 Part 6

Clause / Sub-clause Requirement Confor ENATS 41- Requirement Confor
IEC 62271- IEC 60265: - 36 - Part 1 - Remarks
102 PART 1 mance Clause / mance
code Sub- code
clause
6.5.5.2 Mechanical strength
6.5.5.2 Prevent water
accumulation
6.5.5.2 Mounting
6.5.5.2 Over toggle
5.6 5.6 Stored energy operation 6.5.6 Stored energy operation
5.7 5.7 Independent manual 6.5.7 Independent manual
operation operation
6.5.7 Integral rods to 6.5.5.2
5.8 5.8 Operation of releases 6.5.8 Operation of releases
5.9 5.9 Low and high-pressure 6.5.9 Low and high-pressure
interlocking and interlocking and
monitoring devices monitoring devices
5.10 5.10 Nameplates 6.5.10 Nameplates and labeling
6.5.10 Short circuit making
current
6.5.10 Open/close indication
5.11 5.11 Interlocking devices 6.5.11 Interlocking devices and
padlocking facilities
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IEC 62271-102, IEC 60265:PART 1 ENATS 41-36 Part 6

Clause / Sub-clause Requirement Confor ENATS 41- Requirement Confor
IEC 62271- IEC 60265: - 36 - Part 1 - Remarks
102 PART mance Clause / mance
1 code Sub- code
clause
8 8 Guide to the selection of, 6.8 Guide to the selection of
disconnectors and switch-disconnectors,
earthing switches disconnectors and
earthing switches
9 9 Information to be given 6.9 Information to be given
with enquiries, tenders with enquiries, tenders
and orders and orders - schedule 6.1
10 10 Rules for transport, 6.10 Rules for transport,
storage, installation, storage, installation,
operation and operation and
maintenance maintenance
11 11 Safety 6.11 Safety
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IEC 62271-102, IEC 60265: Part 1 ENATS 41-36 Part 6

Clause / Sub-clause Requirement Confor ENATS 41- Requirement Confor
IEC 62271- IEC 60265: - 36 - Part 1 - Remarks
102 PART 1 mance Clause / mance
code Sub- code
clause
6.5.11 Locking of high level
actuation
6.5.11 Earthing switch interlocks
6.5.11 Key interlock (36kV
disconnector )
5.12 5.12 Position indication 6.5.12 Position indication
6.5.12 Only one visible
5.13 5.13 Degrees of protection by 6.5.13 Degrees of protection by
enclosures enclosures
5.14 5.14 Creepage distances 6.5.14 Creepage distances
5.101 Special requirements for
earthing switches
5.102 Requirements in respect
of the isolating distance
of disconnectors
5.103 Mechanical strength
5.104 Operation of
disconnectors, and
earthing switches -
position of the movable
contact system and its
indicating and signaling
devices
5.105 Maximum force required
for manual operation
5.106 Dimensional tolerances
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IEC 62271-102, IEC 60265: Part 1 ENATS 41-36 Part 6

Clause / Sub-clause Requirement Confor ENATS 41- Requirement Confor
IEC 62271- IEC 60265: - 36 - Part 1 - Remarks
102 PART 1 mance Clause / mance
code Sub- code
clause
6.5.201 Flexible leads and
connections
6.5.201 Multi-strand / laminations
Covered
6.5.201 Stress relief at
connections
6.5.201 Supported (clearance/
ear )
6.5.201 Lugs (BS
2874,ENATS43-92)
6.5.202 Surface preparation and
coatings
6.5.203 Mounting arrangements
6.5.205 Contacts
6.5.205 Self aligning / high
conductivity
6 6 Type tests 6.6 Type tests
6.6 Table 6.3
6.1 6.1 General
6.2 6.2 Dielectric tests
6.3 6.3 Radio interference
voltage tests
6.4 6.4 Measurement of
resistance of the main
circuit
6.5 6.5 Temperature rise tests
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IEC 62271-102, IEC 60265:Part 1 ENATS 41-36 Part 6

Clause / Sub-clause Requirement Confor ENATS 41- Requirement Confor
IEC 62271- IEC 60265: - 36 - Part 1 - Remarks
102 PART 1 mance Clause / mance
code Sub- code
clause
6.6 6.6 Short-time withstand
current and peak
withstand current tests
6.7 6.7 Verification of the degree
of protection
6.8 6.8 Electromagnetic
compatibility (EMC) tests
6.101 Making and breaking
tests
6.102 6.102 Mechanical operations
test
6.103 6.103 Operation under severe
ice conditions
6.104 Operation at temperature
limits
7 7 Routine tests 6.7 Routine tests
7.1 Dielectric test on the main
circuit
7.2 Dielectric test on auxiliary
and control circuits
7.3 Measurement of the
resistance of the main
circuit
7.4 Tightness
7.5 Design and visual checks
7.101 7.101 Mechanical operating
tests
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Appendix 2 (continued) – Self Certification Conformance Declaration

Type Tests for Overhead Conductor Connected Air-break Switch-disconnector.

Instructions for completion:

 Complete a separate table for each variant and rating
Type test reports table based on ENATS 41-36 Table 6.3  ENA/SAP to complete columns 1 to 4
*See bottom of table for conformance declaration codes  Manufacturer to complete columns 5 to 10
** I = Independent; M= Manufacturer; ENA= Energy Networks  When test report also covers another rating insert ‘See ???A unit’ in
the Remarks
Association column
N.B. All tests on ???A unit unless otherwise stated

Manufacturer: Product Ratings:

Reference:

Name: Signature: Date:

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1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Test Requirement Specification and standards Rated Test Confor Test Date of Test Witnes Remarks
value req’d mance value test station s
Y or * Report I, M or
N / Cert ENA **
No
1 Dielectric IEC60694. Sub-clause 6.2, IEC60265. Sub-
clause 6.2. IEC62271-102. Sub-clause 6.2.
Tables 1a and 1b of ENATS 41-36.
2 Wet 1 minute Voltage Sub-clause 6.5.5.2 of ENATS 41-36
Withstand test on
3 operating rod insulated
Measurement of resistance IEC 60694. Sub-clause 6.4, IEC60265. Sub-
insert
of circuits clause 6.4, IEC 62271-102. Sub-clause 6.4
4 Temperature Rise - IEC 60694. Sub-clause 6.5, IEC60265. Sub-
clause 6.5, IEC 62271-102. Sub-clause 6.5

5 Short-time withstand current IEC 60694.Sub-clause 6.6, IEC60265. Sub-

and peak clause 6.6, IEC 62271-102. Sub-clause 6.6.
6 withstand current
Verification tests.(
of protection IEC 60694.Sub-clause 6.7, IEC60265. Sub-
3sec short time).
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1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Test Requirement Specification and standards Rated Test Confor Test Date of Test Witness Remarks
value req’d mance value test station I, M or
Y or N * Report ENA **
/ Cert
Weatherproofing for outdoor equipment. ( clause 6.7, IEC 62271-102. Sub-clause
outdoor IP3XDW minimum ) 6.7,
Mechanical impact. ( outdoor – 5J ) Sub-clause 1.5.13 of ENATS 41-36
7 EMC tests IEC60694.Sub-clause 6.9, IEC60265.
Sub-
8 Short-circuit making and breaking tests - clause
IEC 6.9, IEC
60265: 62271-102.
PART Sub-clause
1. Sub-clauses 6.101,
Switch-disconnector 6.9 1
(TD
( class E1 general purpose switch - IEC to 5, Table 5).
60265. Sub-clause 3.4.103.1). Test values as per Tables 6.1 & 6.2 of
9 Mechanical operations - Disconnector / ENATS
IEC 60265: PART 1 . Sub-clause 6.102.
Switch-disconnector - 1000 operations. 41-36.
IEC62271-102. Sub-clause 6.102.
(Class M0 disconnector - IEC 62271-102
Sub-clause 3.4.101.1).
(Class M1 general purpose switch - IEC
60265 Sub-clause 3.4.103.4).
10 Mechanical operations - Earthing switch – IEC62271-102. Sub-clause 6.102.
1000
11 Operation under severe ice conditions IEC 60265: PART 1 . Sub-clause 6.103.
(10mm thickness IEC62271-102. Sub-clause 6.103.
12 Finish Performance to ENATS 98-1.
13 Process Control ISO 9001

N/A = Clause is not applicable/appropriate to the product

Cs1 = The test conforms fully with the requirements of this clause
Cs2 = The test conforms partially with the requirements of this clause
Cs3 = The test does not conform to the requirements of this clause
Cs4 = Test not performed, but alternative evidence/ technical case offered

Ct1 = Independent witnessed tests

Ct2 = Not fully independent witnessed tests
Ct3 = Self verified tests
Ct4 = Alternative tests / evidence offered
Ct5 = Manufacturer has underwritten that the product meets the functional and performance requirements without further testing.
Ct6 = Not tested
 Document reference NPS/ 001 /003
Version: - 3.2 Date of Issue: - April 2011 Page 21 of 23

Appendix 3 - Addendum to Supplier Requirement

Supporting evidence of compliance with type tests shall be submitted with the completed tender document.

Manufacturers may provide alternative tenders for items not complying with the above specification. This shall
be clearly stated together with detailed descriptions of any variation from the specification, together with
drawings and test results.

The supplier shall provide with the tender full technical details of the equipment offered and shall indicate
any divergence from these standards or specifications.

Logistical Requirements

To enable Northern Powergrid. to store the product(s) in accordance with the manufacturer’s
recommendations the Tenderer should provide details of the recommended storage environment with respect
to each tendered product.

Details should be provided where relevant in respect to the minimum and maximum exposure levels,
frequency of exposure and duration of exposure of the packaged item with respect to;

* Ambient temperature * Atmospheric corrosion

* Humidity * Impact
* Water * Vibration
* Dust * Solar radiation

The Tenderer shall ensure that each item is suitably packaged and protection to maintain the product and
packaging as “fit for service” prior to installation taking account of the potential for an outdoor storage
environment. All packaging shall be sufficiently durable giving regard to the function, reasonable use and
contents of the packaging. Where product packages tendered are made up of sub packages all the sub
packages shall unless varied by this specification, be supplied securely packaged together. Where items are
provided in bagged/boxed form the material from which the bags are manufactured shall be capable of
sustaining the package weight and resisting puncture by the materials within. Tenderer shall submit at the
time of tendering the details of the proposed packaging (i.e. materials composition and structure) to be used
for each product. Where the Tenderer is unable to provide packaging suitable for outdoor storage then this
should be stated at the time of tender.

Palletised goods shall be supplied on standard 1200mm x 1000mm pallets.

Clearly legible, easily identifiable, durable and unambiguous labelling shall be applied to each individual and
where relevant multiple package of like products. Where products packages tendered are made up of sub
packages each sub packages shall be marked. As a minimum requirement the following shall be included;

* Manufacturer’s trademark or name

* Description of item
* Date of packaging and/or batch number and/or serial number
* Northern Powergrid. product code
* Weight
 Document reference NPS/ 001 /003
Version: - 3.2 Date of Issue: - April 2011 Page 22 of 23

Appendix 4 – Pre-commissioning testing, Routine Inspection and maintenance

requirements
Suppliers shall provide details of the recommended pre-commission testing and inspection required.
They shall also provide information regarding periodic inspection and maintenance requirements to be undertaken
during the lifetime of their product.

Detailed inspection and maintenance instructions shall be also be provided.

Document reference NPS/ 001 /003
Version: - 3.2 Date of Issue: - April 2011 Page 23 of 23

Appendix 5 – Information Return Check List

The following information shall be provided by the supplier for review by Northern Powergrid. . Additional
information shall be provided if requested.

Requirement Provided
(Y/N)
Full product descriptions and part number/reference

Appendix 2 – completed self certification conformance declaration (for each variant offered)

Complete set of drawings for each variant

Type test evidence

Manufacturing routine test plan

Periodic inspection, test and maintenance requirements

Packaging information

Instructions/Manuals for: transportation & handling, storage, installation, commissioning,

operation & maintenance, de-commissioning and disposal.

Spares availability list

COSHH data sheets

ISO:9001, ISO:14001 and ISO:18001 certification and manuals