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No.
Failure item
operation
Internal Control
37
Alarm
Power Loss
External/Custom
38
er Control Power
Alarm
Loss
Control Power
39
Trip
Loss Overtime
UPS Under
40
Alarm
Voltage
UPS Under
41
Voltage
Trip
Overtime
HV Cabinet Door
42
Trip
Open
System
default
Failure definition
The backup control power
provided by the
phase-shift transformer
auxiliary winding is lost
The control power
provided by the user is
lost
Both control power from
the user's line and from
the phase-shift
transformer are lost
simultaneously over
30min.
The failure information
will be reported when the
battery voltage is low.
After control power from
the user's line and from
the phase-shift
transformer are lost ，
UPS under voltage occur
over 1min.
MVD high voltage cabinet
door is open
Solutions
1. Check the wiring and voltage
of the backup control power.
2. Check whether the
corresponding switches are
closed and whether the
corresponding relays work
normally.
1. Check the wiring and voltage
of the external control power.
2. Check whether the
corresponding switches are
closed and whether the
corresponding relays work
normally.
1. Check the wiring and voltage
of external control power.
2. Check the wiring and voltage
of the internal backup control
power.
3. Check whether the
corresponding switches are
closed and whether the
corresponding relays work
normally.
1. Check if the battery voltage
is above 12V each.
2. Check the switch mode
power supply module output
voltage is 26V
1. Check the wiring and voltage
of external control power.
2. Check the wiring and voltage
of the internal backup control
power.
3. Check whether the
corresponding switches are
closed and whether the
corresponding relays work
normally.
4. Find the reasons for UPS
failure and restore the power
supply as soon as possible.
1 Check the state of the MVD
cabinet doors.
2 Check the position switch of
the cabinet door and its
contacts.
105
Remarks
If the cabinet
door is open
before the high
voltage
power-on, the
closing allowed
signal cannot be
sent. If the
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