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Universal Motor Controller
UMC100-FBP
V 6
Technical Description
Phase Sequence Protection
Enable this protection function to prevent connected equipment from a wrong rotation direction e.g when
driving a crusher or conveyor. If this protection function is active the motor wires must have a deined
order which is from left to right. It is possible to change the expected direction if wiring was done in a
different way. Take care that contactors are mounted after the UMC to ensure the phase sequence is not
changed by switching the contactors (e.g. REV starter).
L1
T1
T2
Ca
Power
0
V
10
Motor Protection with Thermistor (PTC) acc. to EN 60947-8 (type A sensors)
PTC thermistors are semiconductor elements with a very high positive temperature coeficient. They are
embedded directly in the phase windings of the stator. In contrast to the thermal overload protection that
responds to the load current, the thermistor protection responds to the change in thermistor resistance
due to temperature change in the motor windings.
The thermistors are selected to have a rated operating temperature that corresponds to the insulation
class, type and construction of the motor. At the rated temperature the thermistor resistance increases
sharply up to the hot temperature resistance value.
The UMC senses this abrupt change in the resistance. When thermistor protection is activated there is
also an internal supervision which detects open or short-circuit faults from the thermistor circuit.
u
��
Motor with intergated
PTC sensors
R
Relevant Parameters:
•
PTC
FieldBusPlug / Issue: 11.009
L2
L3
Cb
5
6
7
8
9
UMC100
READY
MOT.ON
FAULT
Relay
5
6
7
8
9
230VAC
DO
DO
DO
DO
DO
1A
C
C
0
1
2
Inputs
24V
24VDC
24
DC
DI
DI
DI
DI
DI
DI
V
Out
0
1
2
3
4
5
11
12
13
14
15
16
17
18
T1
u
Relevant Parameters:
•
Check phase sequence
•
Phase reversal
T2
Ca
Cb
- 41 -
UMC100-FBP
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