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OPERATION (cont’d)
Pre-Operation Check Points
Check the following points before starting the operation.
1) Wiring is correct.
2) A voltage of 2400 V, or 4160 V, ±10% can be supplied as the input power supply voltage.
3) A voltage of 480 VAC ±10% can be supplied as the control power supply voltage.
4) The ground bus and any shielded wires are grounded.
5) The motor frame is also grounded.
6) The motor main circuit wire is not grounded.
Powering-On
The power should be turned on when the motor is completely stopped.
1) Turn on the control power supply MCCB "CONTROL."
2) Interlock the drive with the interlock switch on the keypad.
3) Turn on the main power supply.
4) Release the interlock switch on the keypad.
Operation
This section shows a typical operation procedure. You are also required to observe your own safety
rules to prevent accidents.
Normal Operation
When carrying out a normal operation using the digital interface (refer to the keypad manual for
keypad operation), check that the necessary interface signals are correctly connected and then follow the
procedure below.
1) Set the frequency command signal.
2) Turn on the IL (interlock) input signal if used.
3) Turn on the UVS input.
4) Turn on the EXT (start command) input signal.
5) Vary the frequency command as needed. Do not run the drive at zero speed unless you have a
speed sensor.
6) Turning off the EXT signal during operation ramps the motor to a stop.
7) Removing the UVS signal or the IL signal during operation turns off the output of the drive and
the motor coasts to a stop. If these signals are removed during operation, the EXT command must
be removed and the UVS and/IL restored before the drive will restart.
Powering-Off
1) Stop the motor by removing the EXT, the IL, or the UVS command.
2) After the motor has stopped, interlock the drive with the interlock button on the keypad.
3) Turn off the external main power supply.
4) Turn off the control power supply MCCB "CONTROL."
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