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112 • Start Procedure for Medium voltage Motor
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13.
START PROCEDURE FOR MEDIUM VOLTAGE MOTOR
13.1
Special Attention Notes
Special
Attention!
Make sure that you know where the Emergency stop button is located, so you
can stop immediately if needed.
Verify that the Emergency stop button is operative and pushing the Emergency
stop button disconnecting the motor from the mains.
During the entire starting time you should continuously read the three currents
as shown on the HRVS-DN LCD display. They should show, more or less same
values.
If the currents are significantly different - STOP IMMEDIATELY. Do not wait the
total start time until a trip occurs.
Verify that NUMBER OF STARTS parameter is set to 1 and STARTS PERIOD
is set to 20.
Remember ! Do not start too often, especially if the starting time is long.
Prevent damage to both motor and starter !
Carefully read the Soft Starter Instruction Manual as well as the optional Motor
Protection Relay (MPR) Instruction Manual if installed.
When mains voltage is connected to the HRVS-DN, even if control voltage is
disconnected, full voltage appear on the HRVS-DN load terminals. Therefore,
for isolation purposes, it is necessary to connect an isolating device upstream to
the HRVS-DN.
Power factor correction capacitors must
not
be installed on the load side of the
HRVS-DN. When required, install capacitors on the line side of the HRVS-DN.
Do not interchange line and load connections. Verify correct connections to the
HRVS-DN terminals: L1, L2, L3, L1b, L2b, L3b, U, V, W.
Before starting the motor verify its rotation direction. If needed, disconnect the
rotor from the mechanical load and verify the correct direction of rotation.
Prior to start up procedure, make sure that line voltage and control voltage
match the ones shown on the label of the HRVS-DN.
When the Start signal is initiated and a motor is not connected to load terminals,
the S. SCR OR WR. CON protection will be activated. Other loads such as
incandescent light bulbs, resistors, etc. may also cause a S. SCR OR WR. CON
fault.
13.2
Prior to Commissioning in Medium Voltage
Verify that the Full Load Ampere (FLA) of the motor is lower than or equal to the Full Load Current (FLC) of
the HRVS-DN, and that the mains and control voltages are as indicated on the side and/or front label of the
HRVS-DN.
Verify that HRVS-DN FLC
≥
motor FLA!
Verify that mains voltage is correct!
Verify that control voltage is correct!
HRVS-DN label - example