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138-KV Power Circuit Breaker

This document contains technical specifications for electrical circuit breakers and disconnect switches. It lists 17 required specifications for circuit breakers, including voltage ratings, current ratings, withstand voltages, operating mechanisms, and temperature ranges. It also lists 10 required specifications for disconnect switches, including voltage and current ratings, operation mechanisms, and protection marking. Bidders are required to provide manufacturer details and ratings that meet or exceed the specifications outlined in this document.

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715 views2 pages

138-KV Power Circuit Breaker

This document contains technical specifications for electrical circuit breakers and disconnect switches. It lists 17 required specifications for circuit breakers, including voltage ratings, current ratings, withstand voltages, operating mechanisms, and temperature ranges. It also lists 10 required specifications for disconnect switches, including voltage and current ratings, operation mechanisms, and protection marking. Bidders are required to provide manufacturer details and ratings that meet or exceed the specifications outlined in this document.

Uploaded by

wexki
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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BID DOCUMENTS

SECTION VI - TECHNICAL SPECIFICATIONS


PART II - TECHNICAL DATA SHEETS

SECTION VI – TECHNICAL SPECIFICATIONS


PART VI – TECHNICAL DATA SHEETS

III – ELECTRICAL WORKS

A. POWER CIRCUIT BREAKER

Name of Bidder: __________________________

Signature of Bidder: __________________________

NPC’s
ITEM DESCRIPTION UNIT SAMPLE DATA
REQUIREMENT

Circuit Breaker
1. Manufacturer By Contractor

2. Place of Manufacturer By Contractor

3. Nominal System Voltage, kV kV 138

4. No. of interrupter units per pole *1


5. No. of Phase 3
6. Rated Insulation Level
a. Lightning Impulse
kV 650
Withstand Voltage (BIL), kV
b. Power Frequency
kV 275
Withstand Voltage
7. Frequency Hz 60

8. Rated Continuous Current A * 4000

9. Rated Operating Sequence Cycles 0-3 min CO-3 min - CO

Rated short-time withstand


10. kA * 40
current (1s-3s), up to
Rated short-circuit breaking
11. kA * 40
current, up to
Vacuum or Gas
12. Type of Breaker
Insulated
Spring-Charged
13. Operating Mechanism
motor operated
14. Mechanism Voltage VDC 125
15. Trip and Closing Ckt. Voltage VDC 125

16. Temperature Range °C * -55 up to +55

17. Rated Break Time * 3 cycles

NATIONAL POWER CORPORATION VI-IIIG-1/2


BID DOCUMENTS
SECTION VI - TECHNICAL SPECIFICATIONS
PART II - TECHNICAL DATA SHEETS

Disconnect Switch

1. Manufacturer By Contractor

2. Place of Manufacturer By Contractor


3. Nominal System Voltage kV 138
4. Rated Current A * 4000
Short Circuit withstand
5. kA * 50
Current/3s
6. Rated Peak withstand Current kA * 125
Manual &
7. Operation Mechanism
Motorized
8. Rated Voltage of Motor VDC 125

9. Control Loop Voltage VDC 125


International Protection
10. IP65
marking

Notes * The Contractor shall determine the required rating but shall not be lower than the rating
indicated above.

** Contractor shall place in the filled-in data “submitted” or “will submit”, “will perform” or had
been performed” as appropriate

Name of Bidder: __________________________

Signature of Bidder: __________________________

NATIONAL POWER CORPORATION VI-IIIG-2/2

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