Delta Electronics MVF2000 Series, Руководство по эксплуатации продукта

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IX. Troubleshooting
The MVF2000 medium voltage drive is comprised of monitoring and protection function.
The failures are categorized into alarms and faults. When there is an alarm, only warning
information will be sent and the system can be powered on, started and operated normally.
When there is a fault, the system will stop immediately and send warning information.
Click
to view the specific information on alarms or faults.
Caution!

When the MVD has a failure, the reset and re-operation of the system
shall not be conducted recklessly, instead of that, the reason of the
failure shall be found and the system shall be re-operated after
eliminating the failure.

The repair of the MVD shall be conducted after the power is confirmed
to be off and the dc link capacitors of the power cells are completely
discharged.
Troubleshooting list
No. Failure item
System
default
operation
Failure definition Solutions Remarks
1
Input Over
Current(Softwar
e)
Trip
The input current is
higher than 150% of the
rated current
1. Check the input current.
2. Check the set value.
2 Input phase loss Trip
One or more input high
voltage cable cannot
supply primary power to
the input transformer 1. Check the input voltage.
2. Check whether the input
wiring is loosen or
disconnected.
3
Input Power
Loss
Trip
The voltage values of
input three phases are all
lower than 70% of the
rated value
1. Check the input voltage.
4
Input Under
Voltage
Alarm
The effective value of
Input voltage is lower
than 90% of the rated
value
1. Check the input voltage.
System
operation is
configurable
5
Input Over
Voltage
Trip
The effective value of
input voltage is higher
than 110% of the rated
value
1. Check the input voltage.
6 Input Grounding Trip
The input grounding
occurs, and the duration
time is above 5s
1. Check input cables, copper
bars and transformer.
System
operation is
configurable
7
Input Sequence
Fault
Trip
The input cables are
reversely connected
1. Check the sequence of input
cables.
System
operation is
configurable