Elkwood Section and Northwest 161kV Circuit Breakers

The circuit breaker(s) shall be furnished for operation in the following physical conditions: 2.1 Altitude: 500 to 2000 feet above mean sea level. 2.2 Ambient temperature: -30 degrees F to 110 degrees F. 2.3 Wind load: 80 mph. 2.4 Seismic zone: 2 as defined by UBC. 3. RATING 3.1 Nominal Voltage, kV, RMS................................................... 161.5 3.2 Rated Maximum Voltage, kV, RMS...................................... 169 3.3 Rated Voltage Range Factor, K................................................ l.0 3.4 Rated Continuous Current, Amperes, RMS, 60 Hz................. 2000 3.5 Rated Short Circuit Current, kA, RMS, Symmetrical.............. 40 (at rated maximum kV) 3.6 Rated Interrupting Time, Hz...................................................... 3 3.7 Rated Reclosing Time, Hz......................................................... 20 3.8 Maximum Symmetrical Interrupting Capability, kA, RMS..... 40 (K times rated short circuit current) 3.9 Closing and Latching Capability, kA, RMS............................. 64 (1.6 times rated short circuit current)...