Protective Functions - IMO Jaguar CUB Instruction Manual

8.6 Protective Functions

Name
Overcurrent - Stops the inverter output to protect the inverter
protection from an overcurrent resulting from overload.
- Stops the inverter output to protect the inverter
from an overcurrent due to a short circuit in the
output circuit.
- Stops the inverter output to protect the inverter
from an overcurrent due to a ground fault in the
output circuit. This protection is effective only
when the inverter starts. If you turn on the
inverter without removing the ground fault, this
protection may not work.
Overvoltage The inverter stops the inverter output by detecting
protection an overvoltage (400 VDC for 200V series, 800
VDC for 400V series) in the DC link circuit.
This protection is not assured if excess AC line
voltage is applied inadvertently.
Undervoltage Stops the inverter output when the DC link circuit voltage drops
protection below the undervoltage level (200 VDC for 200 V series, 400 VDC
for 400 V series).
However, if data "4 or 5" is selected for F14, no alarm is output
even if the DC link circuit voltage drops.
Input phase Detects input phase loss, stopping the inverter output. This
loss protection function prevents the inverter from undergoing heavy stress that
may be caused by input phase loss or interphase voltage
unbalance exceeding 6% and may damage the inverter.
If connected load is light or a DC reactor is connected to the
inverter, this function will not detect input phase loss if any.
In single-phase series of inverters, this function is disabled by
factory default.
Output phase Detects breaks in inverter output wiring at the start of running and
loss protection during running, stopping the inverter output.
Inverter - Stops the inverter output by detecting excess heat sink
temperature in case of cooling fan failure or overload.
Braking - When the built-in or external braking resistor overheats, the
resistor inverter stops running.
* It is necessary to set the function code data corresponding to
the resistor used (built-in or external).
Overload Stops the inverter output if the Insulated Gate Bipolar Transistor
protection (IGBT) internal temperature calculated from the output current and
cooling fan temperature detection is over the preset value.
Electronic In the following cases, the inverter stops running the motor to
thermal protect the motor in accordance with the electronic thermal
overload function setting.
relay
- Protects general-purpose motors over the entire frequency
range.
- Protects inverter motors over the entire frequency range.
* The operation level and thermal time constant can be set.
*1
This alarm may not be outputted depending upon the data setting of the function code.
Description
During
acceleration
During
deceleration
During running
at constant
speed
During
acceleration
During
deceleration
During running
at constant
speed
(Stopped)
8-13
LED Alarm
monitor output
displays [30A,B,C]
O C 1
Yes
O C 2
O C 3
O U 1 Yes
O U 2
O U 3
*1
L U
Yes
L
Yes
O P L Yes
O H 1 Yes
d b H
Yes
O L U Yes
O L 1
Yes