Operation
55
RCMS460-490_D00067_03_M_XXEN/12.2017
1. Fault memory
Faults that only occur temporarily can be saved.
on After eliminating the cause of fault all alarm messages remain
stored until a reset is carried out.
off RCMS… exits the alarm mode as soon as the cause of fault is
eliminated.
2. Prewarning
Setting as a percentage of the response value. Setting range: 10…100 %,
resolution of setting 1%.
3. Hysteresis
If the measured value were to oscillate around the response value, the
RCMS… would constantly change from alarm to normal status and back
again. If a hysteresis of 20 % is set, the alarm status is not exited until the mea-
sured value is 20 % below resp. above the response value.
Setting range: 2…40 %, resolution of setting 1%.
4. Frequency
Select the rated frequency of the monitored current. Only if the setting is cor-
rect, can the RCMS… determine the harmonics currents properly.
Setting options: DC, 50 Hz, 60 Hz, 400 Hz.
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