NDC Direct Replacement Circuit Breaker - Hawker Siddeley Switchgear - #1

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Hawker Siddeley Switchgear's NDC-DR is the latest addition to our range of DC Switchgear Products. The NDC-DR offers customers unrivalled circuit breaker technology utilizing magnetic actuator design, increased high speed performance, reliability and reduced maintenance. The NDC-DR circuit breaker is a plug and play product allowing users to replace old and obsolete DC breakers without modification to existing switchgear. Calibrated to specification, the NDC-DR is simply racked into position without the need for any auxiliary protection modification or commissioning. NDC-DR NDC Direct Replacement Circuit Breaker Key Features » Superior, proven Fit & Forget technology with minimal maintenance » A long service life designed to exceed 30 years » Superior compact design concept and operating mechanisms » High speed operation, direct overload and electrical tripping » Simple, reliable mechanism with no mechanical latch » Ergonomic, intuitive truck isolation and interlocking » Enhanced electrical and mechanical endurance » Patented Arc transfer coil » Fully bi-directional current interruption » Hard wearing main contact material (silver tungsten carbide) ensuring long life » Integrated operation with a wide range of circuit breakers The NDC-DR Replaces the following manufacturers: » Bertrum Thomas » GEC » PAMCO » Controlled Power (CPC) » English Electric » Other manufacturers available (please contact Whipp and Bourne Inc.) Rated Voltage V dc 800 1600 Rated Continuous Current A 4000/6000/8000 4000/6000 Rated Short-Time Withstand Current kAp/kA 100/72 100/72 Rated Track Time-Constant ms 210 210 Rated Short-Circuit Current kAp/kA 200/100 200/100 Mechanical Endurance* 50,000 operations 50,000 operations Rated Insulation Voltage kV 4.2 4.2 Control Voltage V dc 48/125/250 48/125/250 * before contact change, 50,000 x 5 with contact change RATINGS your power in safe hands HAWKER SIDDELEY SWITCHGEAR