NDC Direct Replacement Circuit Breaker0 pages

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