KEI-MAKE
Client: Rays Power Infra Limited
PO No.:
KEI Ref.: KEI/DS/QT-4319/P-47580
Rev: 01, Dated: 23.05.2025
TECHNICAL EVALUATION REPORT OF SOLAR DC POWER CABLE FOR
250MWac NTPC Renewable Energy Ltd- SOLAR PROJECT, BIKANER DISTRICT, RAJASTHAN, INDIA
Sr.No. Description Required Data 1C X 300 Sq.mm RPIL reply
IS: 7098 (PART-I & 2) 2011, IS: 8130:
IS: 7098 (PART-I & 2) 2011, IS: 8130: 2013,
A Applicable standards 2013, IS:3975, IS: 5831-84, IS 3961-
IS:3975, IS: 5831-84, IS 3961-6
6
A.1 Cable IS 7098 (P-2) 2011 IS 7098 (P-2) 2011
A.2 Conductor IS: 8130-2013 IS: 8130 - 2013
A.3 Insulation IS 7098 (P-2) 2011 IS 7098 (P-2) 2011
A.4 Armour IS : 3975-1999 IS: 8130 - 2013 & IS: 3975-1999
A.5 Sheath Material IS : 5831-1984 IS : 5831-1984
1.5kV Single core cable, Extruded XLPE
1.5 kV Single core cable, Aluminium Conductor,
Insulation, Galvanised Steel/Aluminium Flat
Extruded XLPE Insulation, Aluminium Flat Strip
Strip Armour, Overall Extruded FR Rated
B DC Main Cables Specifications Armour, Overall Extruded FR Rated PVC ST 2 Outer
PVC ST 2 Outer Sheathed DC Power
Sheathed DC Power Cable. 1.9/3.3 kV Confirming
Cable. 19/33 kV Confirming to IS 7098-
to IS 7098- 2/2011 with latest amendments.
2/2011 with latest amendments
1 Cable size 1C x 300 Sq.mm 1C X 300 Sq.mm
2 Electrical properties
2.1 Rated Voltage 1.5kV DC 1.5kV DC
2.2 Maximum Operated Voltage 1.8kV DC 1.8kV DC
Permissible Voltage & Frequency
2.3 +10% of rated voltage +10% of rated voltage
Variation for satisfactory operation
3 Type of cable A2XFaY A2XFaY
3.1 Armoured / Unarmoured Armoured Armoured
3.2 Earthed/Unearthed Earthed Earthed
4 Conductor
4.1 Material Aluminium Aluminium
H4 Grade as per latest amendment in H4 Grade as per latest amendment in IS:8130-
4.2 Grade
IS:8130-2013 2013
4.3 Shape of conductor Stranded Circular compacted Stranded Circular compacted
4.4 Flexibility Class Class 2 Class 2
4.5 Stranded conductor Yes Yes
4.6 No. of strands VENDOR TO FURNISH as per IS 8130 37 Nos. (Approx.)
Approx. dia of wire before stranding
4.7 VENDOR TO FURNISH 3.28 mm
and compaction
5 Current ratings (A)
5.1 In Ground at 30°C Should be obtained from IS 3961-6 463 Amp.
5.2 In Duct at 30°C Should be obtained from IS 3961-6 377 Amp.
5.3 In Air at 40°C Should be obtained from IS 3961-6 561 Amp.
Overload for 130°C for 100 hours in any 12
5.4 Over load capacity VENDOR TO FURNISH
consecutive months or 500 hours in its lifetime
Short circuit Capacity for 1 sec (for
5.5 VENDOR TO FURNISH 28.2 kA
conductor)
Max. allowable conductor Temperature
5.6 130°C Confirmed
during overload
1.217 times of ground 30°C & 1.264
times of air 40°C, 100 hours in any 12
5.7 Overload capacity Confirmed
consecutive months, 500 hours during
the life time of cable
5.8 Dielectric Strength (kV/mm) VENDOR TO FURNISH 40
5.9 AC Test Voltage VENDOR TO FURNISH 10 KV For 5 minutes
Maximum DC resistance of conductor at
5.10 VENDOR TO FURNISH 0.100
20 Deg. C (ohm/Km)
Approx. AC resistance of conductor at
5.11 VENDOR TO FURNISH 0.128
90 Deg. C (ohm/Km)
5.12 Approx. Reactance (ohm/km) VENDOR TO FURNISH 0.09
5.13 Approx. Capacitance (Microfarad/Km) VENDOR TO FURNISH 0.57
6 Insulation
Extruded XLPE Insulation as per IS: Extruded XLPE Insulation as per IS: 7098 (P-2)-
6.1 Composition of Insulation
7098 (P-2)-2011 2011
6.2 Thickness (nom) –mm 2.50 Nominal 2.5
6.3 Tolerance on thickness VENDOR TO FURNISH As per Cl. No. 12.3 of IS: 7098 P-2
Minimum Tensile Strength (without
6.4 VENDOR TO FURNISH 12.5 N/Sq.mm
ageing)
Minimum Elongation at break (Without
6.5 VENDOR TO FURNISH 200%
Break)
6.6 Water absorption VENDOR TO FURNISH As per IS: 7098 P-2 (Gravimetric method)
6.7 Filled or Unfilled VENDOR TO FURNISH Unfilled
6.8 Type of Curing VENDOR TO FURNISH Sioplas curing
Min. Insulation resistance at 27 °C & 90 Minimum volume resistivity of 1 X 10^14 Ohm-cm
6.9 VENDOR TO FURNISH
°C - MΩ/km at 27°C & 1 X 10^12 Ohm-cm at 90°C
6.10 Core colour Natural
Page 1 of 3
Client: Rays Power Infra Limited
PO No.:
KEI Ref.: KEI/DS/QT-4319/P-47580
Rev: 01, Dated: 23.05.2025
TECHNICAL EVALUATION REPORT OF SOLAR DC POWER CABLE FOR
250MWac NTPC Renewable Energy Ltd- SOLAR PROJECT, BIKANER DISTRICT, RAJASTHAN, INDIA
Sr.No. Description Required Data 1C X 300 Sq.mm RPIL reply
7 Armour
7.1 Material Aluminium/GI Aluminium
Flat Strip - Suitable for carrying earth fault current
7.2 Strip/wire Flat Strip - Suitable for 5kA for 1 sec
of 5kA for 1 sec
7.3 Dimension of strip/wire VENDOR TO FURNISH 4.0 X 0.8 +/- 10%
Shall be suitable for carrying earth fault current of
7.4 Cross sectional area (Approx.) VENDOR TO FURNISH
5kA for 1 sec
7.5 Minimum Armour coverage 90% (Min.)
DC Resistance of armour at 20 °C
7.6 VENDOR TO FURNISH 0.54
(Approx) - Ω/km
Max. AC Resistance for conductor at 90
7.7 VENDOR TO FURNISH 0.128 (Approx.)
°C
7.8 Approx Reactance (Ohm/Km) VENDOR TO FURNISH Not applicable
7.9 Approx Capacitance (Micro Farad/Km) VENDOR TO FURNISH Not applicable
AC test voltage capability between
7.10 10kV 10 KV For 5 minutes
conductor & armour for 5 mins
7.11 Armour Fault 5 KA for 1 sec Confirmed
Circulating current developed in
screen/armour per 100m .Run with
7.12 screen/armour earthed at one end VENDOR TO FURNISH Negligible
when cable is carrying (for single core
cables only)
8 Outer sheath
FR Rated Extruded PVC Type - ST2 as FR Rated Extruded PVC Type - ST2 as per IS : 5831
8.1 Material
per IS : 5831 - 1984 - 1984
Calculated Dia over armour as per IS:
8.2 VENDOR TO FURNISH 26.1
10462 P-1 – mm
Minimum thickness of sheath (with
8.3 VENDOR TO FURNISH 1.56 mm (minimum thickness shall be maintained)
tolerance) -mm
8.4 Color of outer sheath Black (50% Qty), Red (50% Qty) Confirmed
Operating temperature range of cable
should be 0°C to + 90°C. Continuous
conductor temperature capability
8.5 Temperature withstand Capability Confirmed
should be 90°C without any distortion.
Permissible short circuit temperature
should be 250°C for 5 sec
9 Mechanical properties
Max. Overall Diameter (with ± 3 mm
9.1 VENDOR TO FURNISH 31.0
tolerance) – mm)
Safe pulling force when pulled by
9.2 VENDOR TO FURNISH 30
pulling eye on the conductor -N/mm²
9.3 Min. Bending Radius – mm As per IS 1255 15 x Overall diameter of cable
9.4 Approx. Net wt of Cable - kg/km VENDOR TO FURNISH 1300 Kg/Km
10 Thermal & Chemical Properties
10.1 Under Continuous Operation 90 °C 90 °C
10.2 Under Short circuit condition 250 °C 250 °C
Fire resistance requirement-
10.3 Fire Retardant (FR Rated) Confirmed
FR/FRlS/lSZH
Overload for 130°C for 100 hours in
Overload for 130°C for 100 hours in any 12
10.4 Thermal Property any consecutive months or 500 hours in
consecutive months or 500 hours in its lifetime
its lifetime
10.5 FR-LSH PROPERTIES
MIN.OXYGEN INDEX AS PER ASTMD-
a) VENDOR TO FURNISH Min. 29% as per ASTM D-2863
2863
MIN.TEMPERATURE INDEX AS PER
b) VENDOR TO FURNISH Min. 250 °C as per ASTM D-2863
ASTMD-2863
MAX.ACID GAS GENERATION AS PER
c) VENDOR TO FURNISH Max. 20% (by weight) as per IEC: 60754-1
IEC 754 (P-1)
MAX.SMOKE DENSITY RATING AS PER
d) VENDOR TO FURNISH Max. 60% as per ASTM D-2843
ASTMD 2843
10.6 FLAMMABILITY TEST
a) Vertical Flame propagation test As per EN 60332-1-2 As per IEC 60332 P-1, IEC 60332 P-3 Cat-B
11 De-rating Factor VENDOR TO FURNISH
Variation in Ambient air temperature-
11.1 VENDOR TO FURNISH
a) at 40Deg.C & b) at 50Deg.C
11.2 Variation in Ground temperature VENDOR TO FURNISH
11.3 Variation in Depth of laying VENDOR TO FURNISH As per IS: 3961 P-7
Variation in Thermal resistivity of soil-
11.4 a)two Cables touching & b)three Cables VENDOR TO FURNISH
touching
Group rating factor for Single core
11.5 VENDOR TO FURNISH
cables
Page 2 of 3
Client: Rays Power Infra Limited
PO No.:
KEI Ref.: KEI/DS/QT-4319/P-47580
Rev: 01, Dated: 23.05.2025
TECHNICAL EVALUATION REPORT OF SOLAR DC POWER CABLE FOR
250MWac NTPC Renewable Energy Ltd- SOLAR PROJECT, BIKANER DISTRICT, RAJASTHAN, INDIA
Sr.No. Description Required Data 1C X 300 Sq.mm RPIL reply
12 Drum
12.1 Type (Wood/Steel) VENDOR TO FURNISH Non Returnable Wooden Drum
12.2 Approx. Wt of Cable drum with Cables VENDOR TO FURNISH Shall be selected as per final packing length
12.3 Max/Standard length per drum VENDOR TO FURNISH 2000 meters
Tolerance allowed in cable length per
12.4 +2% (No Negative tolerance) Confirmed
drum
NON - STANDARD LENGTH NOT LESS THAN 100
12.5 NON STANDARD LENGTH
MTRS. UP TO 5% OF ORDER QTY.
12.5 ORDER QUANTITY TOLERANCE + 2%
12.6 Marking on cable VENDOR TO FURNISH
Manufacturer’s name or trade mark VENDOR TO FURNISH
Voltage grade VENDOR TO FURNISH
Year of manufacture VENDOR TO FURNISH
Type of insulation VENDOR TO FURNISH
No. of core and size of cables VENDOR TO FURNISH
Marking shall be on outer sheath as KEI CABLE ELECTRIC, VOLTAGE GRADE, XLPE, FR-
follows: LSH, CABLE SIZE, CABLE CODE, YEAR OF MFG &
13 Additional requirements 1. Cable size and voltage grade. SEQUENTIAL LENGTH MARKING SHALL BE
2. Sequential marking of length of the PROVIDED ON OUTER SHEATH AT EVERY METER BY
cable in metres at every meter. PRINTING/ EMBOSSING
BIDDER NAME/LOGO, VOLTAGE
GRADE, CABLE SIZE, A2XFY, IS 7098
(P2), YEAR OF MFG., ISI LOGO CM/L
Embossing/Printing
No., Sequential Length Marking, Word-
FRLSH to be embossed/Printed at every
1 meters interval
Tests - Shall be conducted at Type Test: As per IS 7098 (II)2011,
factory before dispatch IS 8130 – 2013, IS 5831-1984, IS
10810-53 & IEC-332-1.
Routine Test: As per IS 7098 Refer enclosed QAP.
(II)2011, IS 8130 – 2013,
Detailed QAP shall be submitted
after vendor finalization.
Note: 1. The value given above are subject to tolerances as per relevant standards. Incase of any typographical error/ discrepancy, relevant standards shall be prevailed.
2. Suitable fillers/ binder tape(s) may be provided wherever necessary as per manufacturer's discretion.
(For KEI Industries Limited)
Page 3 of 3
