Unbalance Protection - Siemens SIMOCODE pro System Manual

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.
Level:
Response
Here you can choose the response of SIMOCODE pro in case of phase
unbalance:
See "Tables of responses of SIMOCODE pro" in
information"
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).
SIMOCODE pro
GWA 4NEB 631 6050-22 DS 03
0 to 100 %
Default: 40 %
and the "Responses" table
Motor protection
Chapter "Important
in Chapter 3.1 "Introduction".
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