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Inverter Systems for Nuclear Power Plants

General
Due to the very stringent safety requirements for equipment installed in Nuclear Power Plants (NPP) and the long operating periods of such plants, the BENNING inverter systems for NPP applications have been designed for a life time of more than 40 years. The inverter systems have also been designed and qualified to fulfill seismic and other NPP requirements and are manufactured and tested according to the quality procedures required for 1-E NPP applications.

The inverters are ideally suited to provide safe backup power to all loads found in a NPP including for instance:

  • DCS systems
  • Computers
  • Instrumentation and Metering
  • Valves
  • Motors

The inverter, together with a battery and battery charger, isolates the loads from irregularities and power outages on the mains supply.

Static inverter family

  • Single-Phase Inverter Series WPE
  • Three-Phase Inverter Series WPD

The regulation characteristics of this range of inverters results in very small voltage deviations, even with load changes of one hundred percent.

Both series are manufactured using Transistor (IGBT) technology and have an electronic bypass (SBS) and a built-in service bypass switch.

The function and warning LEDs are on the front control panel, together with a mimic diagram.

The inverters are designed for continuous inverter operation as well as for stand-by operation.

Three Phase Inverter – WPD

DC Voltage

110

220

Inverter output power
[kVA]

5
10
20
30
40
50
60
80
100
120
160
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-
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5
10
20
30
40
50
60
80
100
120
160
200
300
400

Video: Test of Inverters NPP to fulfill seismic requirements