VAMP 52 - 2.4. Relay function dependencies; 2.4.1. Application modes

2.4 Relay function dependencies 2 Protection functions Technical description
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hysteresis
Hysteresis_GT
Figure 2.3-3. Behaviour of a greater than comparator. For example in
overcurrent and overvoltage stages the hysteresis (dead band) acts
according this figure.
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hysteresis
Hysteresis_LT
Figure 2.3-4. Behaviour of a less than comparator. For example in under-
voltage and under frequency stages the hysteresis (dead band) acts
according this figure.
2.4. Relay function dependencies
2.4.1. Application modes
NOTE: Application modes are available only in VAMP52
The application modes available are the feeder protection mode
and the motor protection mode. In the feeder protection mode
all current dependent protection functions are relative to
nominal current I
n
derived by CT ratios. The motor protection
functions are unavailable in the feeder protection mode. In the
motor protection mode all current dependent protection
functions are relative to motor’s nominal current I
mot.
The
motor protection mode enables motor protection functions. All
functions which are available in the feeder protection mode are
also available in the motor protection mode. Default value of
the application mode is the feeder protection mode.
The application mode can be changed with VAMPSET software
or from CONF menu of the device. Changing the application
mode requires configurator password.