Product Specification
44
IST5 Tower UPS 10kVA~40kVA User Manual
6. Maintenance
This chapter introduces UPS maintenance, including the maintenance instructions of
power module and monitoring bypass module and the replacement method of dust filter.
6.1 Precautions
1.
Only certified engineers are authorized to maintain the UPS.
2.
The components or PCBs should be disassembled from top to bottom, so as to
prevent any inclination from high gravity centre of the cabinet.
3.
To ensure the safety before maintaining, measure the voltage between operating
parts and the earth with multimeter to ensure the voltage is lower than hazardous
voltage, i.e. DC voltage is lower than 60Vdc, and AC maximum voltage is lower
than 42.4Vac.
4.
Wait 10 minutes before opening the cover of the power module or the bypass after
pulling out from the Cabinet.
6.2 Instruction for Maintaining UPS
For the maintenance of the UPS, please refer to chapter 5.2.4 for the instruction to
transfer to maintenance bypass mode. After maintenance, re-transfer to normal mode
according to chapter 5.2.5.
6.3 Instruction for Maintaining Battery string
For the Lead-Acid maintenance free battery, when maintenance the battery according
to requirements, battery life can be prolonged. The battery life is mainly determined by
the following factors:
1. Installation. The battery should be placed in dry and cool place with good ventilation.
Avoid direct sunlight and keep away from heat source. When installing, ensure the
correct connection to the batteries with same specification.
2. Temperature. The most suitable storage temperature is 20 ºC to 25ºC. The battery life
will be shortened if the battery is used under high temperature or in deep discharging
status. Refer to product manual for details.
3. Charging/discharging current. The best charging current for the lead-acid battery is
0.1C .The maximum current for the battery can be 0.3C.The suggested discharging
current is 0.05C-3C.
4. Charging voltage. In most of the time, the battery is in standby state. When the utility
is normal, the system will charge the battery in boost mode (Constant voltage with
maximum limited) to full and then transfers to the state of float charge.
5. Discharge depth. Avoid deep discharging; which will greatly reduces the life time of
the battery. When the UPS runs in battery mode with light load or no load for a long
time, it will cause the battery to deep discharge.
6. Check periodically. Observe if any abnormality of the battery
，
measure if the
voltage of each battery are in balance. Discharge the battery periodically.
Warning
Summary of Contents for IST5010
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