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Norton 69 KV Breaker


Location
Missouri
Publication Date
10/07/2019 07:37 AM EDT
Closing Date
10/14/2019 03:00 PM EDT
Issuing Organization
City Utilities of Springfield (CU)
Solicitation Number
Description

Specifications include, but are not limited to: The Contractor shall furnish one (1) 69kV SF6 circuit breaker with twelve (12) current transformers, as described in this technical specification. The breaker shall meet and or exceed the technical specification details in this section. If there are conflicts among the above, the Contractor will determine which is applicable, and submit in writing to the Engineer for approval, the manner in which the conflict is to be resolved. The breaker shall be electrically and mechanically trip free, and shall comply with or exceed the following design criteria and ratings: Type: SF6, Dead Tank, Frame Mounted, Outdoor, 3Ø, Single Throw Nominal line-to-line voltage: 69 kV, 60Hz System connections: Solidly Grounded Wye Maximum Wind Velocity: 125 mph UBC Seismic Zone: 2A Radial Ice Loading: 13 mm Ambient Temperature: -22˚F to 140˚F Elevation: 1500’ AMSL Rated Maximum Voltage: 72.5 kV Rated Continuous Current: 2000A Insulation BIL Withstand Test Voltage (Breaker and Bushings): - Low frequency (60 Hz dry for 1 minute): 160 kV - Full wave impulse (1.2 X 50-microsecond waveform): 350 kV - Chopped Wave Voltage Withstand (2µsec): 452 kV - Chopped Wave Voltage Withstand (3µsec): 402 kV Rated short-circuit current at rated maximum voltage: 40 kA

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