Active crowbar board / Interface board

The converter and the load shall be protected against inductive voltage surges by a crowbar, which short-circuits the load and provides a safe path for the load current. The crowbar could be bidirectional in current and voltage. Crowbar triggering is passive and active:

  • Passive triggering: overvoltage (BOD),
  • Active triggering: signal from the RegFGC3 control,

The RefgFGC3 crate Type 10 is able to control up to four 3-phases IGBT inverters and four active crowbars. The control signals are generated by the DSP_REGULATION board (PWM control) and the VS_STATE_CONTROL board (Active Crowbar Control). These control signals are merged on the backplane and routed to four Burndy connectors 19 points (SKPULSES_x, x= A…D). Each SKPULSES cable is then connected to an Interface card (EDA-02812) to split the control signals of the IGBTs (PWM) and the control signals of the crowbar which is then routed to the Active Crowbar Board (EDA-02811). An interface board (EDA-02883) with optic fiber interface also exists.


Technical Referee Emilien Coulot

Technical specification


Active Crowbar board


Interface board standard execution
Interface board with optic fiber


Test procedure and report

.edms, .edms

Pulse transformer .edms