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Medium voltage circuit breakers

Medium voltage circuit breakers
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Medium voltage circuit breakers K=1.0 medium voltage vacuum circuit breakers Application description The new line of Type VCP-W medium voltage vacuum circuit breakers with K=1.0 rating provides the same benefits as the standard VCP-W breakers in terms of user-friendly operation, inspection and maintenance. Additionally, the same general VCP-W product features, accessories and footprint characteristics are maintained. Benefits • • Optimized Eaton vacuum interrupters with K=1.0 performance with the latest vacuum technology Capacitor switching ratings confirmed by testing to the latest standards with C2 performance for single and back-to-back bank configurations Eaton is introducing a new line of Type VCP-W medium voltage vacuum circuit breakers with K=1.0 rating tested to the latest capacitor switching standards. ULT listed ratings up to 15 kV, 3000A and 63 kA. VCP-WSE special environment circuit breakers available up to 15 kV, 3000A and 50 kA Eaton Corporation has dedicated years of research, design and testing to complete a family of medium voltage circuit breakers that meets and exceeds the rigorous requirements of ANSI, IEC and GB standards. Fixed or drawout configurations Standard five-cycle (80 m-sec) or optional three-cycle (50 m-sec) clearing performance Standard rail or roll-on-the-floor configurations VCP-WC extra capability circuit breakers and VCP-WG generator circuit breakers available for special applications VCP-W MVA rated circuit breakers continue to be available to support customer needs As part of the VCP-W product family, VCP-W K=1.0 breakers serve all segments of the electrical industry such as utility, commercial, industrial, mining and marine.

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Background MVA breaker ratings first originated many years ago to describe the preferred ratings of air-magnetic circuit breakers, which had published short-circuit current interruption ratings based on their rated maximum voltage. However, these breakers could achieve higher interruption ratings at lower operating voltages until the maximum interruption rating was exceeded. The ratio of these two interruption ratings is called Rated Voltage Range indicator (K). MVA ratings do not accurately reflect the true capabilities of vacuum circuit breakers because the drop in operating voltage has...

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