Emerson 710NPBA manual Optional LVD Driver Lite Circuit Card

User Instructions	UM581127000
Spec. No. 581127000 (Model 710NPBA)	Issue AB, March 22, 2012

Optional LVD Driver Lite Circuit Card

The optional LVD driver lite circuit card contains an LVD inhibit switch and indicator. Refer to Figure 2-4.This card is required for distribution cabinets that contain two LVLD contactors or one LVLD contactor and one LVBD contactor. LVBD contactor must be rated at 600A or lower.

Caution: If the switch is returned to the ON (normal) position when low voltage disconnect alarms are active, a low voltage disconnection will occur.

Warning: While the LVD inhibit switch is in the OFF (inhibit) position, a low voltage disconnection will not occur if battery or load voltage decreases below the low voltage disconnect setpoint. For maximum battery protection, this switch should NOT be left in the OFF (inhibit) position.

J3	J1
J2
	S1

		Note: The UP position will not close the LVBD contactor
LVD Inhibit		if the battery is manually disconnected using the
		Manual Battery Disconnect Switch.
Active Indicator
	LVD Inhibit Switch
Illuminates when the	Momentary UP / Middle / Down
low voltage disconnect	Momentary UP Position: Closes all LVD Contactors (inhibit mode).
circuit has been disabled	Middle Position: OFF (ACU+ DOES NOT control LVD’s) (inhibit mode).
through the use of the	DOWN Position: ON (ACU+ controls LVD’s).
LVD Inhibit switch.

Figure 2-4

Optional LVD Driver Lite Circuit Card (P/N 547873)

Chapter 2. Operating Procedures Page 7

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