EM330D User Manual
A Special Purpose Inverter for Hoisting
34
Procedure
Working Scope
Idling Trial Operation
Check
When motor is idling, inverter is started by the control handle of the
construction lift and runs at low speed. Please check and confirm the running
status of drive system.
1.
Motor: stable operation, normal rotation, correct rotational direction, normal
acceleration/deceleration process, no unexpected vibration, noise and odd
smell.
2.
Inverter: correct data displayed on the keypad, fans and relays working
stably, no unexpected vibration or odd smell.
3.
Turn off the power immediately if anything unexpected.
On-load Trial Operation
Check
1.
If idling check is normal, connect the drive system to load for trial operation.
2.
Please connect braking unit and braking resistor to the hoisting device and
construction lift correctly.
3.
Switching forward and reverse operation modes through control handle of
hoisting devices, check if the inverter is in normal operation, and if
mechanical brake is enabled.
4.
Observe response of output frequency through the speed signals given by the
control handle.
5.
When runing downward at high speed, the handle returns 0 position, the
inverter shall stop immediately without coast-to-stop.
6.
For external braking unit:Observe if the indicator of braking unit is flashing.
1. If the inverter is applied to hoisting, it would be highly recommended that the
distance shall be less than 3m between the lift and ground for trail operation.
2
．
Please note that normal operation starts only after idling and full-load trail
operation succeeded.
5.2
Trial Operation Precautions
5.2.1
Turn on the Power
Check before power-on:
Voltage of power supply:3-phase 380V, 50Hz
Connect the input power supply cable to the input terminals R,S, and T of
inverter.
Connect the output terminals U,V, and W of inverter to the input terminals of
motor.
All control circuit terminals are connected to correct control device, and
terminals shall be off.
Motor is idling.
Turn the power on after all above setting have been confirmed.
