GUIDE TO THE
REGENERATIVE APPLICATION
SINUS PENTA
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A048 Overvoltage
A048
Description
Overvoltage in DC-bus.
Event
Voltage measured in DC-bus capacitors has exceeded the max.
value allowed for the proper operation of the drive class being used.
Possible
causes
Overvoltage can be due to the regenerative drive or the motor drive,
as they are both connected to the DC-bus.
Too high supply voltage; make sure that it does not exceed
240VAC +10% for class 2T, 480V + 10% for class 4T, 600VAC +
10% for class 5T, 10% for class 6T.
Very inertial load and too short deceleration ramp for the motor
drive, which delivers excessive energy to the mains, thus causing
failures in the regenerative drive.
Motor pulled by the load (eccentric load).
Failure in DC-bus voltage measure circuit.
Solutions
1. Check if voltage is supplied to the 3 mains phases (terminals
R
,
S
,
T
). Check mains voltage measured in
M502
and check DC-
bus voltage measured
M501
. Also check the values of these
measures which are sampled in the
FAULT LIST
as soon as the
alarm trips.
2. If a very inertial load is connected and the alarm tripped when
decelerating, set a longer deceleration time for the motor drive, or
increase the DC-bus voltage regulator gain; make sure that setting
is steady. If short stop times are required, or if the motor is pulled by
the load even if the regenerative drive is properly tuned, a braking
resistor can be installed on the regenerative drive up to size S32.
3. If the alarm persists, please contact ELETTRONICA
SANTERNO’s After-sales service.
NOTE
Braking resistors can be installed in the regenerative drive only. For sizes
greater than S32, please contact Elettronica Santerno.