Panasonic M2X Series Instruction Manual page 34

Protective Function
Display on
Type
5-digit LED
Restart
prevention
when
③
power is
restored
∗2
Overcurrent trip
(at constant speed)
-
Protection by CT
detection
-
(During acceleration)
-
(During deceleration)
Regenerative
overvoltage trip
④
Overvoltage trip
retry at
power-ON
Overload trip
(electronic
thermal)
∗1 This function is enabled only when [
∗2 When [ Restart prevention when power is restored] is set to
inverter from restarting automatically.
Protective function
Prevents the inverter from
restarting automatically if already
given the run command before
power is recovered or turned up or
it is reset.
When the inverter's output current
exceeds approx. 200% of its rated
current, the inverter trips. (The
displayed message varies
depending on the inverter's
operating condition.)
When the converter's DC voltage
exceeds approx. 800 V, the inverter
trips.
When overvoltage trip occurs
because of too large inductance of
the power factor improving AC
reactor in the inverter's input circuit,
is displayed, and the
output is turned off.
When the converter's DC voltage
falls below approx. 800 V, the trip
is automatically canceled,
enabling normal operation.
If the motor current continues to
exceed the level set in [Electronic
thermal], the inverter will be
tripped because it may be
overloaded.
Overvoltage trip retry at power-ON] is set to
- -
34
Corrective action
Issue the stop command once,
and then issue the run command.
Power supply voltage drop,
excessive GD
acceleration/deceleration time,
short-circuited load or ground fault
may be considered as the cause
of the trip. Examine the cause of
trip thoroughly.
If trip occurs while the inverter is
running, the deceleration time may
be too short and should be
extended. In some cases, an
external regenerative resistor may
be required. If the trip occurs
upon power-up, the inductance of
the power factor improving AC
reactor at the input of inverter may
be too large, use an AC reactor
compatible with the capacity of the
inverter.
The power factor improving AC
reactor' capacity may be too large.
Select a proper rector according to
the inverter's capacity.
∗1
Reduce the load, change
operating pattern or use larger
size inverter.
, this function prevents the
2
of load, insufficient
.