Smart Tower UPS 10-30KVA User Manual
Chapter 3 Operation
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Under normal operation condition, the inverter output and static bypass power supply must be fully
synchronized to achieve uninterrupted load switch between inverter output and static bypass line, The
synchronization of the inverter output and static bypass power is achieved by the inverter control circuit,
When the static bypass power frequency is in a allowed value for synchronization, the inverter control circuit
always keep the inverter output frequency tracking the static bypass power frequency.
UPS support a manually controlled maintenance bypass. When UPS shut-down for maintenance or
repair. It enables the critical load to be powered from this bypass power supply
Note
When the UPS is running in bypass mode or supporting power for load on maintenance bypass, there
is no abnormal ac power protection for load equipment.
3.1.3 Battery Temperature Compensation
Connect the temperature sensor to UPS battery temperature interface in battery cabinet to achieve
optimized battery management.
Fig 3-2 Temperature compensation diagram
3.2 Operation Mode
The UPS are on-line, double-conversion, reverse-transfer UPS, and they have the following operation
modes:
Normal mode
Battery mode
Auto-Restart mode
Bypass mode
Maintenance mode (manual bypass)
ECO mode
Frequency converters mode
Parallel operation redundancy mode
3.2.1 Normal Mode
Mains supplying power to UPS rectifiers provide DC to inverters, which provide continuously
uninterrupted AC power to the load. The rectifier provides battery floating charge or boost charge via
charger simultaneously.