7-8 Trips and Fault Finding 590 Series DC Digital Drive
Trip Message and Meaning Possible Reason for Trip
FIELD OVER I
The motor field current has exceeded 120% of the
calibrated value
External field has incorrect supply phases applied
(Alarm only operates with field current control mode selected)
Alarm time delay : 10 seconds
HEATSINK TRIP
The Drive heatsink temperature is too high
The ambient air temperature is too high
Poor ventilation or spacing between Drives
Fan failure, check fuse on power board, wrong rotation (models above 70A bridge
rating)
Blocked ventilation slots
Clogged air filters
Excessive armature current - nominal armature current on motor nameplate
should be checked against the current calibration for the Drive.
Note:
The stack must be allowed to cool in order to re-start the Drive.
Alarm time delay : 0.5 seconds
THERMISTOR
The motor temperature is too high
Inadequate ventilation
Blower failure -check for direction, clogged air filters (models above 70A bridge
rating)
Excessive armature current - check nominal armature current on nameplate
against current calibration)
Note:
The motor must be allowed to cool in order to re-start the Drive.
Alarm time delay : 5 seconds
OVER VOLTS (VA)
Motor armature voltage has exceeded 120% of rated
volts
Loose armature connection
Badly adjusted field voltage setting
Badly adjusted field current loop
Badly adjusted field-weakening bemf loop
Badly adjusted speed loop
Alarm time delay : 1 second
To Next Page
Loading...
