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Procedure 9-4
Adjusting the LVD unit
Use this procedure to adjust and verify the operation of the modular business
package (MBP) low-voltage disconnect (LVD) unit mounted in the rear of the
master cabinet.
The threshold adjustments and settings for the LVD unit and the float voltage
for the batteries are:
Threshold
Low-voltage alarm (LVA)
Low-voltage disconnect (LVD)
Low-voltage disconnect return (LVDR)
Float voltage (FLT)
Requirements
The rectifiers must be adjusted and verified and remain in the power-up
condition (all rectifier circuit breakers are ON). The BIP circuit breakers must
be in the OFF position.
Tools and materials
The following tools are required:
•
•
Caution
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
slotted screwdriver (small, 0.1 in. blade)
Fluke 8050A rms voltmeter (or equivalent)
DANGER
Risk of injury or damage
Read the warnings and precautions, in Chapter 1, to
minimize any risk to personnel and equipment.
Replacing the low-voltage disconnect unit 9-13
—continued—
Setting (V dc)
–47.0 ± 0.2
–42.5 ± 0.2
–50.5 ± 0.1
–54.5 ± 0.1
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