A new line of medium-voltage circuit breakers in ratings through 38 kV for use in utility substations has been introduced. Breakers are ideal for switching and protection of feeders as well as shunt capacitor banks and reactors. These circuit breakers offer high-speed operation, reduced contact travel and high-dielectric strength, providing three-cycle total interrupting time. They feature exclusive arc-resistant enclosure construction that meets American National Standard Institute and International Electrictechnical Commission standards at full short-circuit rating. Long life is assured through hermetically sealed vacuum interrupters that protect the contacts from corrosion and contamination. The circuit breakers require minimal maintenance; interrupter assemblies and contact-wear indicators are readily accessible for inspection. Reliable operation is provided by a simple, robust stored-energy operating mechanism.
S&C Electric Co.