Marathon Power TRTC-2002-N1, Installation, Operation And Maintenance Manual

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Section 8: Adjustments

8.1 Back-Up Time Test

8.2 Sense Mode - Normal and Generator Waveforms

8.1 Back-Up Test
Purpose: Describes how to measure the back-up capacity of batteries.
This test provides the measurement of back-up time during power outage by actually
discharging the batteries. The back-up time is load as well as battery dependent, thus more
back-up time is available with a lower load (in Amps or Watts) and less time with more load.
EXAMPLE:
Start time is
1PM
.
ON BAT contact if selected, is activated.
Disconnect the incoming Utility Power.
Front Panel LCD indicates ON BATT. Battery
supplies the power to the load. Record the start
time.
LOW BATT is displayed.
The time between the two is the LOW
BATTERY CAPACITY back -up time.
Record the time when the unit shuts off. (Both
LEDs are off and the LCD display indicates
STANDBY)
TURN ON the incoming Utility Power for
recharging the batteries.
Low Battery Alarm LED appears at
4PM
.
LOW BAT contact at selected value will be
activated.
Low Battery capacity battery back-up time will
be the time difference between 4PM and 1PM
or
3 hours
.
Shutdown time is
5PM
.
Battery reserve time will be the time
difference between 4PM and 5PM or
1 hour
.
The
Total Battery Back-up
time is the sum of
Low Battery capacity back-up time and Battery
Reserve time or the time difference between
5PM and 1PM or 4 hours.
It is recommended to perform this test every
6 months. Make sure the batteries are fully
charged before starting this test.
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