There are three situations as follows to enter bypass mode:
•
Bypass is abnormal after the UPS is powered up (including frequency
conversion enable) and the UPS isn't turned on.
•
Shut down in mains power mode, overload or overtemperature
•
Exit fault mode and bypass are normal
When bypass is normal, turn off the UPS or the inverter circuit has failure, the UPS
transfer to bypass mode to supply uninterruptible power to the load.
Note:
Bypass mode doesn't have function of backup.
Maintenance bypass
Bypass input
----------------------
Mains circuit input _______,/
AC
I
DC rectifier
DC/ DC boost
Charger
DC
I
AC inverter
Bypass mode operation process
-------
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Output
5.4 Mains power mode {Frequency conversion mode}
In mains power mode, the mains power from mains circuit input supply AC power to
the UPS rectification, and supply DC power to the inverter circuit after PFC power
factor correction, and then supply uninterruptible AC power to the load via the
inverter circuit. After the inverter startup, automatically start the charger charging
batteries.
LED indicator in mains power mode is as shown in the figure below: the inverter
LED indicator (green) is illuminated, meanwhile LCD display LinE characters.
Note:
The inverter output frequency in frequency conversion mode is configured
output frequency and cutting off bypass is necessary; the inverter output frequency
in mains power mode is related to bypass frequency (the default is 50 Hz when
bypass is abnormal and frequency conversion disenable ). Please contact with
supplier or after sales staff if need to set frequency conversion mode.
~34~
