Over Voltage (Ov); Low Voltage (Lv) - Delta HES Series User Manual

Chapter 5 Methods of Anomaly Diagnosis

5-4 Over Voltage (ov)

Lower voltage of power
supply within the upper
limit
It's likely hybrid servo
controller breaks down or
malfunctions due to noise.
Please contact Delta for
assistance.

5-5 Low Voltage (Lv)

If there is power outage (including
If voltage of power supply
is within regulated range
Any load in the same power
supply system that has larger
load of starting current
If Lv occurs when the circuit
breaker and electromagnetic
It's likely hybrid servo controller breaks
down or malfunctions due to noise.
Please contact Delta for assistance.
|HES Series
No
No
exceeds the protection value in
Lv
Low voltage
momentary blackout)
No
Any broken devices or
Yes
bad connection in the
supply circuit
No
Yes
No
Yes
contactor are ON
No
OV: Over voltage
Check if voltage of
power supply is within
the regulated range
Yes
If the voltage of DC BUS
action
Yes
Consider
implementing brake
unit
Yes
Reset and
restart
Replace broken components
and correct connection
No
Modify power supply system to
comply with the regulations
If the capacity of power supply
transformer is appropriate
5-8
No
Yes