SINUS PENTA
REGENERATIVE
APPLICATION
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140
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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
10% for 2T class, 480V + 10% for 4T class,
10% for 5T class, 10% for 6T class.
•
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 M503 and check DC-bus
voltage measured in M502. 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 S30.
N.B.: Braking resistors can be installed in the regenerative drive
only. For sizes greater than S30, please contact Elettronica Santerno.
3.
If the alarm persists, please contact ELETTRONICA SANTERNO’s
After-sales service.