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Universal Motor Controller
UMC100-FBP
Technical Description
Connecting External Current Transformers (CTs)
If the nominal motor current I
The external CT transforms the primary current flow in a smaller secondary current according to the trans-
mission ratio. This smaller current is then measured from the UMC100.
With the parameter Current Factor the current transformer transmission ratio can be configured. So the
UMC100 knows the actually flowing primary current which is then used for the internal processing.
All types of protection current transformers of class 5P10 (Standard EN/IEC60044) can be used.
The selection should be made based on the requirements:
• Secondary current (= current in the UMC100) range about 4A.
• Through-hole area if single strands are used
• Max. load: 60 mW (UMC100: 30m, conductor: wire size 2.5 mm², length 2 m each: 30 mW)
• Requirements for current transformers acc. to IEC60044-1 table 11 and 14:
Actual / nominal current
Max. inaccuracy
These values must be guaranteed by the current transformer supplier. The inaccuracy is added to the
inaccuracy of the UMC100.
The pass-through direction of the strands is important if the phase sequence supervision is enabled or if a
voltage module is used. For currents up to 850 A, space saving combinations are recommended.
L1
L2
Wiring schema when using ABB Korc current transformers.
UMC100-FBP
is above 63 A an external current transformer (CT) must be used.
e
Measuring current transformer class 1
5 %
20 %
3
1.5
L3
Korc Terminals
Korc Klemmen
1
2
3
4
5
6
Protection c.t. class 5P10
100 %
120 %
1
1
- 24 -
100 %
1000 %
1
5
T1
T2
Ca
Cb
5
6
UMC100
READY
MOT .O N
FAUL T
Rela y
5
6
7
230V AC
DO
DO
DO
1A
C
C
0
Inputs
Powe r
24V
24VDC
0
24
DC
DI
DI
DI
DI
DI
V
V
Out
0
1
2
3
4
10
11
12
13
14
15
16
17
FieldBusPlug / Issue: 03.2012
7
8
9
8
9
DO
DO
1
2
DI
5
18
- Quick Links:
- Using the Umc100 in a Profibus...
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