ABB ACS580MV, Commissioning Manual

Page: 27 / 150

Standard Commissioning Process 27

Protection relays
ACS580MV with integrated transformer
The protection relays in the feeding switchgear for the converter’s transformer must be
commissioned and tested as per the manufacturer’s documentation.
The settings for the protection relay are defined by the protection or system engineer. The
commissioning engineer should only verify these values.
Relay test protocols must be available on site before the drive is energized.
A protection curve can be programmed into the relay. The protection curve defines how
long a current of a certain magnitude is allowed to flow until the relay opens the MCB.
There are three types of protection modes:
•
Instantaneous
•
Short delay
•
Time over current protection
Transformer protection modes
The recommend protection functions and setting values:
NOTICE The below mentioned settings are just informative for the commissioning
engineer, in which range the protection settings should be made. The customer is fully
responsible for the protection settings.
Protection functions Setting value
Immediate overcurrent trip level 10 times the rated current of the
ACS580MV
Short time delay overcurrent trip
level 2 times the cable rated current with
500ms delay
Long time delay protection pickup
level 1.3 times the rated input current of the
ACS580MV