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HT Panel Specification

The document specifies the requirements for an HT panel. Some key specifications include: 1. The HT panel should be outdoor type and comply with various Indian standards. It has an operating voltage of 33kV and rated voltage of 36kV. 2. The busbar has a current rating of 1250A and short time current rating of 18.4kA. It is made of copper and insulated. 3. The circuit breaker type is VCB with a rating of 1250A and short time withstand current of 18.4kA. It uses a vacuum as the arcing quenching medium and has 6 auxiliary contacts. 4. Current and voltage transformers are also

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4K views2 pages

HT Panel Specification

The document specifies the requirements for an HT panel. Some key specifications include: 1. The HT panel should be outdoor type and comply with various Indian standards. It has an operating voltage of 33kV and rated voltage of 36kV. 2. The busbar has a current rating of 1250A and short time current rating of 18.4kA. It is made of copper and insulated. 3. The circuit breaker type is VCB with a rating of 1250A and short time withstand current of 18.4kA. It uses a vacuum as the arcing quenching medium and has 6 auxiliary contacts. 4. Current and voltage transformers are also

Uploaded by

SAEL SOLAR
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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HT PANEL SPECIFICATION

SL. NO DESCRIPTION UNIT HT PANEL


REQUIRED
1 Common features
1.1 Make ABB/Schneider
1.2 Type Outdoor Type
IEC 622271-100-200, IS 13118, IS
Standards 13947, IS 3156, IS 2705, IS 694
1.3
1.4 Operating voltage kV 33
1.5 Rated voltage kV 36
1.6 Rated short time withstand current (3sec) kA 18.4
1.7 Material of enclosure CRCA
1.8 Lightning impulse withstand voltage (peak) kV 170
1.9 Power frequency withstand voltage (1 min) kV 70
1.10 External color of switchgear RAL7032

2 Busbar /Busduct
2.1 Busbar current rating A 1250A
2.2 Busbar short time current rating for 3 sec kA 18.4
2.3 Material of busbar Copper
2.4 Busbar insulated Yes/No Yes
Rated continuos current at 50°C (As per site
2.5 condition) A 630
2.6 Minimum distance between
2.7 ~Phase to phase mm As per IS
2.8 ~Phase to earth mm As per IS

3 Circuit breaker
3.1 Type VCB
3.2 Rating A 1250
3.3 Rated short withstand current (3 sec) kA 18.4
3.4 Arcing quenching medium Vaccum
3.5 Aux contact of breaker
3.6 ~Number (NO/NC) No 6
3.7 ~Voltage V 415
3.8 Antipumping feature provided Yes/No Yes

4 Current Transformer
Manufacturer Precise/Newtech/ECS/Pragati
Type Epoxy Resin Cast
4.1 ICOG
a) For metering
Ratio A 200/1 A
Class 1.0
Burden VA 15
b) For feeder protection
Ratio A 100/1A
Class 5P20
Burden VA 15
c) Special Class
Ratio A 175/1A
Class PS
Knee point voltage (Vk)
Magnetising current at Vk/2
Rct: secondary winding resistance at 75°C

5 Voltage transformer
Manufacturer Precise/Newtech/ECS/Pragati
Type Epoxy Resin Cast
Voltage ratio
~Primary kV 33/√3
~Secondary-1 V 110/√3
~Secondary-2 V 110/√3
Accuracy class for secondary-1 0.5
Accuracy class for secondary-2 3P
VA burden for secondary-1 VA 100
VA burden for secondary-1 VA 100

6 Relay and protection


Type Numerical
Aux supply voltage V 24V/110V DC

a) Feeder protection
Functions 50, 51, 50N, 51N, 94, 95 provided Yes/No Yes
Communication protocol RS485

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