ABB UMC22-FBP - External Current Transformer for Higher Currents

- 19 - UMC22-FBP
Universal Motor Controller UMC22-FBP
Software version 4.0
FieldBusPlug / Issue: 02.2008
V 6
3.2.4 External current transformer for higher currents
All types of protection current transformers class 5P10 (Standard EN/IEC60044) can be used.
The selection should be made based on the requirements:
Secondary current (= current in the UMC22) range about 5 A (recommended CTs have 4 A),
Through-hole area if single strands are used,
Max. burden 60 m⏲ (UMC22: 30 m⏲, conductor: wire size 2.5 mm², length 2 m each: 30 m⏲)
Requirements for current transformers referring IEC60044-1 table 11 and 14:




Measuring current transformer class 1 Protection c.t. class 5P10
actual / nominal current 5 % 20 % 100 % 120 % 100 % 1000 %
max. inaccuracy 3 1.5 1 1 1 5
These values must be guaranteed by the current transformer supplier. The inaccuracy is added to the
inaccuracy of the UMC22.
The pass-through sense of the strands does not affect the operation.
For currents up to 850 A space saving combinations are recommended.
Fig. 3-5: UMC22-FBP with external current transformer for higher currents
Type / Korc
type
Recommended
current range
[A]
Current factor
(Default = 1.0)
Secon-
dary
current
range
[A]
Hole
area
WxH
[mm
2
]
Max.
wire
size
[mm
2
]
Link kit (bar) type
 for contactor
(Order code see
chapter 6.)
Star,
Delta
冑3
wiring
Star,
Delta
冑3
wiring
UMC22
stand alone
0.24-63 0.42-109 1 1.7 - 11 쏗 16 -
4L185 R/4 60-185 104-320 46.2 80.1 1.3-4 22x28 2x70
2 1)
DT450/A185
 AF145, AF185
4L310 R/4 180-310 312-537 77.5 134.2 2.3-4 22x28 2x70
2 1)
DT450/A300
 AF210-AF300
5L500 R/4 300-500 520-866 125 216.5 2.4.4 41x22 3x70
2 1)
DT500AF460L
2)
 AF400, AF460
5L850 R/4 500-850 850-1472 212.5 368.1 2.4-4 41x22 -
DT800AF750L
2)
 AF580, AF750
1)
Wire size has to be fi xed acc. to IEC/EN 60204
2)
Link kits for Star-delta starter (others s. catalogue)
Remark:
If current transformers of other suppliers are used the table above may serve as a calculation basis for the
Current factor. Example: Type 5L500 R/4 means: Primary 500 A, secondary 4 A, current factor 125.
Chapter 3.2.4~1
2CDC 342 035 F0206
max. lenght 2 m each, wire size 2,5 mm
2