Preventive Maintenance
8.5 Battery monitor test
The battery monitor has two main purposes:
1.To show remaining
2.To monitor the condition of the battery, during test or normal battery operation
8.5.1 Back-up time
The
8.5.2 Monitor function
During a test the battery monitor discharges 25% of the energy in the battery.
The monitor can detect, when a battery is weak, or if it is defective. The UPS gives an alarm, if one of the errors is detected. The criteria for the alarms are:
–Battery weak alarm is given, when the measured battery capacity is less than 75% of the original capacity.
–Battery detect alarm is given, when the measured battery capacity is less than 50% of the original capacity.
8.5.3 Functionality of battery test
The test can be started manually or automatically from the user stack.
The automatic test is enabled in the user stack and can be set to 3 or 6 months. When automatic test is enabled, the UPS performs a battery test every 3 or 6 months independent on manually activated battery tests. If conditions for starting a test are not correct at the moment where automatic test is going to start, the test will be skipped.
Conditions for starting a battery monitor test:
–A battery monitor test can only be started if the battery is fully charged (capacity = 100%).
–The UPS is operating in normal operation.
The test is interrupted if:
–The error “battery defective” is encountered.
–If utility fail during battery monitor test.
–The red OFF button is pressed.
–If “EPO” emergency power off is activated.
–If external shutdown is accepted.
After the test the UPS returns to normal operation.
The battery monitor test can be performed with load in the range of
7OA0002 US rev. 04
34 | User Guide Silcon DP300E Series 480V |