Unidrive M400 User Guide
183
Issue Number: 2
OI Snubber
Snubber over-current detected
92
This trip indicates that an over-current condition has been detected in the rectifier snubbing circuit, The exact cause of the
trip can be identified by the sub-trip number.
Recommended actions:
•
Ensure the internal EMC filter is installed.
•
Ensure the motor cable length does not exceed the maximum for selected switching frequency.
•
Check for supply voltage imbalance.
•
Check for supply disturbance such as notching from a DC drive.
•
Check the motor and motor cable insulation with a Megger.
•
Fit an output line reactor or sinusoidal filter
OI.Brake
Braking IGBT over current detected: short circuit protection for the braking IGBT activated
4
The
OI.Brake
trip indicates that over current has been detected in braking IGBT or braking IGBT protection has been
activated.
Recommended actions:
•
Check brake resistor wiring
•
Check braking resistor value is greater than or equal to the minimum resistance value
•
Check braking resistor insulation
OI.dc
Power module over current detected from IGBT on state voltage monitoring
109
The
OI.dc
trip indicates that the short circuit protection for the drive output stage has been activated.
Recommended actions:
•
Disconnect the motor cable at the drive end and check the motor and cable insulation with an insulation tester
•
Replace the drive
Option Disable
Option module does not acknowledge during drive mode changeover
215
The
Option Disable
trip indicates that the option module did not acknowledge notifying the drive that communications with
the drive has been stopped during the drive mode changeover with in the allocated time.
Recommended trip:
•
Reset the trip
•
If the trip persists replace the option module
Out Phase Loss
Output phase loss detected
98
The
Out Phase Loss
trip indicates that a phase loss has been detected at the drive output. If
Output Phase Loss Detection
Enable
(06.059) = 1 then output phase loss is detected as follows:
1. When the drive is enabled short pulses are applied to make sure each output phase is connected.
2. During running the output current is monitored and the output phase loss condition is detected if the current contains
more than TBD % negative phase sequence current for
TBDs.
Recommended action:
•
Check motor and drive connections
•
To disable the trip set
Output Phase Loss Detection Enable
(06.059) = 0
Output phase s/c
Output phase short-circuit
228
Over-current detected on drive output when enabled. Possible motor ground fault.
Recommended actions:
•
Check for short circuit on the output cabling
•
Check integrity of the motor insulation using an insulation tester
•
Is the motor cable length within limits for the frame size?
Over Speed
Motor frequency has exceeded the over frequency threshold
7
In open loop mode, if the
Output Frequency
(05.001) exceeds the threshold set in the
Over Frequency Threshold
(03.008)
in either direction an O.Spd trip is produced. In RFC-A mode, if the estimated frequency (03.002) exceeds the Over
Frequency Threshold in Pr
03.008
in either direction an O.Spd trip is produced. If Pr
03.008
is set to 0.0 the threshold is
then equal to 1.2 x the value set in Pr
01.006
.
Recommended actions:
•
Reduce the
Frequency Controller Proportional Gain
(03.010) to reduce the speed overshoot (RFC-A mode only)
Source
xx
y
zz
Description
Power
system
01
0
00
Braking IGBT instantaneous over-current trip
Source
xx
y
zz
Power
system
01
1
00: Rectifier snubber over-current trip detected.
Содержание Unidrive M400
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