Enatel DC System Manual
Page 14 of 31
6.0
LVD
O
PERATION
This system is configured with a single Low Voltage Disconnect contactor in the battery side of
the circuit (see wiring diagram at rear of this manual).
The supervisory monitor unit is powered from both the rectifier side of the LVD contactor and
battery source. Therefore when the low voltage threshold is reached and the LVD disconnects
the battery, the SM3x will loose voltage sense (as voltage sense is measuring rectifier bus
voltage) but still maintains operation for monitoring system. The LVD contactor will not re-
engage until the rectifier power is restored (i.e., until the DC bus voltage is restored).