Master Lock XR20 Manuel de service télécharger pdf (Page 106)

The phase detector senses input line voltage on each phase. Upon detection of a problem, the

control board is signaled to shutdown the system. The control board, which is referenced to earth

ground, contains optically isolated amplifiers to sense output voltage and current. This circuitry

allows the output to be referenced ±1000 Vdc above earth ground.

The display board contains light-emitting diodes for displaying diagnostic conditions and

provides an interface for meters and switches.

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Master Lock XR20 Manuel de service Page 106