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Low Voltage Disconnect Settings
The LVD disconnect set points are usually a customer generated setting.
As the discharge time increases, the higher the end voltage should be set. For a
discharge of <1hr, this may be as low as 1.75Vpc (42.0V for a "48V" battery), or for an
8-hour discharge, it may be 1.85Vpc (44.4V for a "48V" battery).
Note: that if only one LVD is fitted, LVD2 and LVD3 thresholds are set outside of
possible tripping voltages. This avoids any confusion over which LVD signal is being
used by the EM4x energy manager.
EM4x Web UI page: IO Configuration>IO Boards
Toggle LVD latching On
Example:
Site Settings:
11.2.
DC System Lead Acid Battery Commissioning Checklist
This section is for a more detailed commissioning process than the Essential Set-up
Parameters. It may be printed out separately and filed for record keeping.
DC System Lead Acid Battery Commissioning Checklist
Site Name:
Date:
Tests Without Batteries Connected
Check Float Voltage
Check Load Current
Voltage thresholds can either be checked using an external power supply, or by adjusting the
EM4x float voltage 0.1V above (or below for the low voltage alarms). It is recommended to have
the batteries disconnected.
1.
Adjust the supply/float voltage to 55.7V & observe the "High Float" alarm.
2.
Adjust the supply/float voltage to 57.7V & observe the "High Load" alarm.
3.
Adjust the supply/float voltage to 52.7V & observe the "Low Float" alarm.
4.
Adjust the supply/float voltage to 46.9V & observe the "Low Load" alarm.
High Load Volts (urgent)
High Float Volts (non-urgent)
Newmar • 1580 Sunflower Ave, Suite 100, Costa Mesa, CA 92626
Phone: 714-751-0488 • E-mail: techservice@Newmarpower.com
Value
Results
Meter:
Meter:
57.6V
55.6V
22
/
V
/
A
/
V
/
V
/
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