Motor protection
SIMOCODE pro
GWA 4NEB 631 6050-22 DS 03
3-13
3.3 Unbalance protection
Description
The extent of phase unbalance can be monitored and transmitted to the
control system. A definable and delayable response can be tripped when an
adjustable limit has been overshot. If phase unbalance is greater than 50%,
a reduction in the tripping time according to the overload characteristic
curve takes place automatically, as the heat development in motors
increases under asymmetrical conditions.
Level
The level of unbalance to which SIMOCODE pro should react when overshot
is set here.
Response
Here you can choose the response of SIMOCODE pro in case of phase
unbalance:
See "Tables of responses of SIMOCODE pro" in Chapter "Important
information" and the "Responses" table in Chapter 3.1 "Introduction".
Delay
The unbalance level must be exceeded for the period of the set delay time
before SIMOCODE pro executes the desired response. Otherwise there will
be no reaction.
Adjustment range: 0 - 25.5 s (default: 0.5 s
).
Level: 0 to 100 %
Default: 40 %
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