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UMC22-FBP
Universal Motor Controller UMC22-FBP
Software version 4.0
FieldBusPlug / Issue: 02.2008
V 6
Chapter 3.5~2
Together with CEM11 the UMC22 is able to perform earth fault supervision, with the option of enabling
earth fault trip or earth fault warning. To use CEM11 with UMC22 perform the following steps:
1. CEM11 must be connected to multifunction input DI2 and 24 V DC supply. As soon as DI2 is confi gu-
red as earth fault input and the motor is running a fi lter becomes active to suppress noise.
2. Parameter 21 (DI2 Multi-function input) allows defi ning the time period T an earth fault condition must
be present at minimum before a trip or warning occurs. It is adjustable from 1 to 25 s. See fi gures 3.10
and 3.11 for details.
3. Parameter 14 (Start-Up Time) is used as inhibit time of a ground fault trip from occurring during the
motor starting sequence and is adjustable from 0-600 s. Please note that also the fault Motor blocked
and the warnings Motor current high and low threshold are related to parameter 14.
4. Confi gure the threshold when an earth-fault should be signalled to the UMC. The current must be
directly confi gured at the earth fault monitor (CEM11) itself.
See the technical manual for further details.
In the following fi gures the behaviour of UMC22 is shown in dependency to parameter 21.
Example: If the motor should trip if for at least 16 seconds an earth fault signal is present parameter 21
has to be set to 84 (Start-up inhibit active) or 64 (Start-up inhibit inactive).
Earth fault monitor connected to DI2 and alarm and warning enabled. The warning signal is active as long
as the fault is not acknowledged.
T
x
2
+
T
x
t
Signal from earth
fault monitor
Internal timer
Fault Reset
Alarm, Warning
2CDC 342 028 F0206
Fig. 3-10: Earth fault behaviour: Warning and fault message (alarm)
Earth fault monitor connected to DI2 but fault message (alarm) not enabled.The warning signal disappears
if the earth-fault signal is not active for a user confi gured time T (see parameter 21).
T
T
T
x
x
2
+
T
t
Signal from earth
fault monitor
Internal timer
Warning
2CDC 342 029 F0206
Fig. 3-11: Earth fault behaviour: Warning only
Summary of Contents for UMC22-FBP
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