Catalog excerpts
Other features and benefits include: • Extended capacitor switching (optional) • Tested for out-of-phase switching ratings (ANSI/IEEE C37.09) • Large relay and control compartment • Stainless steel exterior hardware • Porcelain dry-type bushings with extended creep • Highly reliable vacuum interrupters -MTTF over 53,000 years Type SDV7 distribution circuit breaker family includes: • Type SDV7-SE: type SDV7 non-arc-resistant with stored-energy operator Stored-energy operator features: • Time-proven type 3AH3 operator derived from operators introduced in 1977 (over 120,000 produced) • Pair with Siemens protective relays to match any typical application • Moderate and high seismic qualification (Zones 1-4) available • Type SDV7-MA: type SDV7 non-arc-resistant with magnetic-actuator operator • Type SDV7-SE-AR: type SDV7-AR arc-resistant with stored-energy operator • Type SDV7-MA-AR: type SDV7-AR arc-resistant with magnetic-actuator operator. Type SDV7 enclosure types offered: • Standard: non-arc-resistant enclosure • Optional: arc-resistant, accessibility type 2B, tested to ANSI/IEEE C37.20.7. • Common operator for all ratings • Design tested to ANSI/IEEE C37.09. Magnetic-actuator operator features: • Design adapted from type 3AH3 stored-energy operator configuration • High-voltage compartment configuration identical to stored energy version • Design tested to ANSI/IEEE C37.09 • Built-in fast discharge circuit for electronic controller power capacitors • Manual opening handle requires very modest force for operation • Electronic controller life estimated at 30 years. • Meets or exceeds the latest ANSI, IEEE and NEMA standards • ANSI/IEEE "rain tested" enclosure (ANSI/IEEE C37.20.2).
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Technical ratings Footnotes: 1 83 ms/five-cycle optional for stored-energy operator. 2 TRV values are in accordance with ANSI/IEEE C37.06-2009 TRV peak value uc roughly equal to historic E2 value in ANSI/IEEE C37.06-2000. Value t3, time to voltage uc is approximately 1/1.138 times T2 value in ANSI/IEEE C37.06-2000. 3. First value is full-wave impulse withstand circuit breaker open or closed. Second value is chopped-wave impulse withstand, applicable only with circuit breaker closed. 4. Magnetic-actuator availability to be announced for these ratings. Consult factory. Front view Published by...
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