Solcon HRVS-DN series, Инструкция по эксплуатации

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126 • Trouble Shooting
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Problem What To Do
Motor vibrates
mechanically at the
end of starting
process or at the
beginning of soft stop.
current fluctuates.

This phenomena may occur with unloaded or lightly loaded motor, if SOFT
START CURVE 0 is used.

Use standard curve SOFT START CURVE 1 and SOFT STOP CURVE 1.
OPEN BYPASS trip
occurs after end of
start process.

Verify that Current Gain dip switches are set according to the ratio between
the rated current of the starter and the testing motor rated current.

Check Bypass Contactor wiring.
Current reading as
displayed on starter’s
panel is not correct.

Verify that HRVS-DN FLC setting parameter is set according to the rated
current of the starter.

Current Gain dip switches gain current reading as follows:
o
Both Gain dip switches of phases set to on -> gain = 1
o
Gain dip switches # 1 of phases set to off -> gain = 5
o
Gain dip switches # 2 of phases set to off -> gain = 13.4
o
Both Gain dip switches of phases set to off -> gain = 67

Use a Clamp-on the Ammeter to measure test the motor current.

Starter’s current reading should be approximately actual current multiplied by
the gain ratio set by the Gain dip switches.

Set parameters to default parameters and re-program the HRVS-DN.
OVERLOAD trip
occurs after Bypass is
closed.

Verify that current Gain dip switches are set according to the testing motor
rated current versus rated current of the starter. Overload trip can occur if
gain (set by Gain dip switches settings) is too high.

Verify that the HRVS-DN FLC setting parameter is set according to the rated
current of the HRVS-DN.

Set Motor FLA identically to HRVS-DN FLC.

Reset, start again and read currents on screen.

Check if current readings after start are is more than starter’s rated current.
UNDER CURRENT
trip occurs after
Bypass is closed.

Reduce setting of Undercurrent setting in the MAIN & PROTECT Parameters
settings.
MPR does not
respond to current
during low voltage
motor starting. 
This is normal. The MPR (Motor Protection Relay) does not have extra gain
for testing. Its current reading may be very low, below the minimum
threshold.
Motor is started
immediately after
resetting a trip.

Might occur when the Local / Remote switch is set to remote, and the remote
contact is closed.
Note: It is the responsibility of the remote controller to open the remote
start/stop contact immediately upon trip.