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Current and voltage transformers
for
Low Voltage
Edition 05.07
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ALCE 2005 - 07
Operation manual
1. Mounting siteInstrument transformers of ALCE shall be mounted in
accordance with following conditions;
a)Ambient temperature: -20C~40C (Avarage temp.:
lower than 35C)
b)Altitude: lower than 1000 meters.
c)At the places not exposed to sea - breeze, rain,
snow and sunlight and kept under 90% humidity.
d) At places where the exceeded vapor, oil-vapor,
explosive flammable gas shall not occur.
e)At places not subject to exceeded dust & foreing
particles.
f)At places where exceeded oscillation and impact shall
not occur.
2. How to mount
a)Cable and busbar shall not be directly loaded onto
CT&PT.
b) Enough distance shall be taken that primary lead
wires and busbars do not approach the surface of
transformers except the connection terminals. Besides,
please draw your attention for corona and partial
discharge not to occur.
c)Secondary lead wires shall be correctly connected to
the terminals and shall not be approached to the surface
of transformers.
d)The connection shall be correctly done as per the
terminals marks and connection diagram on the name
plate.
e) The earthing terminal on primary side of grounding
type of instrument transformers shall be absolutely
grounded.
f) The earthing terminal on secondary side and the
mounted base (flame) on the body shall be absolutely
grounded.
g)Bolts & Nuts for the connection of cables, busbars
and lead wires shall be firmly fastened.
3.Maintenance and inspection
a)Please check instrument transformers once a month
and pay your attention for noise, over - heat, corrosion
and exceeded polluting. It is recommended to put the
thermo-labels on surface of transformers and terminals
portion.
b)The operation shall be stopped at least once a year
and the dust & foreing particles shall be wiped off with
dry cloth. At that time, please check the appearance,
the iron-core and looseness of bolts & nuts.
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General information
Current transformers for low voltage
- 02 - ALCE 2005 - 07
Location : indoor
Standard, insulation level : IEC - 60044-1, DIN VDE 0414 edition 01/1994, Um: 0,72 kV
Frequency : 50 - 60 Hz
Insulation : thermoplastic casing, insulation class E
Rated continious thermal current : 1,2 In
Secondary rated current : 5A or 1A
Security factor : for class 0.5, at primary current
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General information
Current transformers for low voltage
- 03 -ALCE 2005 - 07
-all types are sealed or pivoted from inside, not openable
Types according to bar dimensions
120
mm
Types Descriptions
Plug-in current transformers. For bars or round conductor.
Wound current transformers (primary cable)
Wound current transformers (primary busbar 25x3 mm x mm)
ADS 20, A 20, ADS 30, ADB 30
ADS 40, ADB 40, A 50, A 61,
ADS 62, ADB 80, ADB 81, A 101,
ADB 111, ADB 120
ASS, ASK
ASB
Current transformer for differential protection.TDR
ARS-1, ARS-2
ARK-1, ARK-2
Bar or cable type. Protection current transformer for relays.ARD-2, ARD-3
Types and descriptions
Primary cable protection current transformer for relays.
Bar-type cast resin.A125
Summation current transformers with up to 6 separate independent primary input circuits.TA-2, TA-3, TA-4, TA-5, TA6
Bar-type. Protection current transformer for relays.
120
mm
Bar widths
20
mm
30
mm
40
mm
50
mm
60
mm
80
mm
100
mm
150
mm
ADS 20, A 20
ADS 30, ADB 30
ADS 40, ADB 40
A50
A61
ADS 62
ADB 80
ADB 81
A101
ADS 100, ADB 111
ADB120
Types
ADB120
A 125
(*)
200
mm
(*) (*)
(*) Upon request
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Tables and dimensions
Current transformers for low voltage
ASS, ADS20, ADS30, ADS40, ADS62, ADS100
- 04 - ALCE 2005 - 07
Types ASS ADS20 ADS30 ADS40 ADS62 ADS100
Primarycurrent
A
For secondary 5A or 1A
0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0
2,55
10
15
20
25
30
40
50
60
75
80
100
125
150
200
250
300
400
500
600
750
800
1000
1200
1250
1500
1600
1800
2000
2500
Cablemm
Windowmm x mm
Barmm x mm
1 2,5 2,5
2,5 2,55 5
5 5
5 5
() ()
() ()
() ()
() ()
() ()
() ()
- 2,5
- 2,5
2,5 5
3,75 5
30 30
30 30
15 15
15 15
30 30
30 30
10 10
10 10
10 10
10 10
2,5 5
3,75 5
5 5
5 5
5 10
-
-
-
15
21 x 5,5
20 x 5
23
31 x10,5
30 x 10
28
41 x 15
40 x 10
30
61 x 31
2(60 x 10)
52
101 x 53
3(100 x 10)
Class
() Penetration winding current transformers All types are protected against contact.
Rated power VA
5 5
() 2,5
() 2,5
10
10
10 15
10 15
10 15
30 30
30 30
30 30
15 15
15 15
15 15
30 30
30 30
30 30
5 5
3000
3200
30 30
30 30
ASS
ADS 20
ADS 30
ADS 40
ADS 62
ADS 100
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Tables and dimensions
Current transformers low voltage
ASK, ASB, A20, ADB30, ADB40, A50, A61
- 05 -ALCE 2005 - 07
ASK
ASB
A20
ADB30
ADB40
A50
A61
Types ASK ASB A20 ADB30 ADB40 A50
1
Primarycurrent
A
Rated power VA
0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0
2,5
5
10
15
20
25
30
40
50
60
75
80
100
125
150
200
250
300
400
500
600
750
800
1000
1200
A61
0,5 1,0
Barmm x mm
Windowmm x mm
Cable
mm
10 10
10 10
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
5 10
10 15
15 15
15 15
10 10
10 15
15 15
15 15
10 10
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
15 15
Class
-
-
-
-
-
-
16
21 x 11
20 x 10
31 x 11
30 x 10
41 x 11
40 x 10
51 x 11
50 x 10
-
62 x 12
60 x 10
26 30 40
For secondary 5A or 1A
15 15
5 5 (*) 5
(*) 10
15 15
15 15
(*) 10
10 10
15 15
15 15
15 15
10 15
10 10
5 10
10 10
10 15
1250 15 15
(except type A20)
All types are protected against contact
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Tables and dimensions
Current transformers for low voltage
ADB80, ADB81, A101, ADB111, ADB120
- 06 - ALCE 2005 - 07
ADB111
ADB120
* For primary currents >4000 A , only 5A secondary current is possible.All types are protected against contact
ADB80
ADB81
A101
Types ADB80 ADB81 A101 ADB111 ADB120
Primarycurrent
A
Rated power VA
0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0
400
500
600
750
800
1000
1200
1500
10 10
10 15
15 15
15 30
15 30
30 30
15 30
15 30
15 30
15 30
15 30
30 30 15 30 15 15
30 45
Barmm x mm
Windowmm x mm
Cablemm
61
82 x 32
2(80 x 10)
30
81 x 31
2(80 x 10)
30
102 x 32
2(100 x 10)
56
102 x 58
3(100 x 10)
70
121 x 72
4(120 x 10)
Class
For secondary 5A or 1A *
15 15
1600
1800
2000
2500
3000
4000
30 30
30 30
30 30
30 30
30 30
30 30
30 30
30 30
30 30
30 30 30 30 30 30
30 45
30 30
30 30
5000
30 30
30 30
30 30
10 15
10 15
10 10
30 30
30 30
30 30
30 30
10 15
15 15
30 30
30 30
30 30
30 30
30 30
30 30
30 30
30 45
30 30
30 30
30 30
30 30
30 30
30 4530 45
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Tables and dimensions
Current transformers for low voltage
ARS-1, ARS-2, ARK-1, ARK-2, ARD-2, ARD-3
- 07 -ALCE 2005 - 07
ARS-1
ARS-2
ARK-1
ARK-2
ARD-2
ARD-3
Primary bars (for type ARK)
Primary currentA
25 - 200
250 - 400
5
10
Bar widthmm
Types ARS - 1 ARS - 2 ARK - 1 ARK - 2
Primarycurrent
A
For secondary 5A or 1A
5P510P5
5
10
15
20
25
30
40
50
60
75
80
100
125
150
200250
300
400
500
600
750
800
1000
1200
1250
1500
1600
1800
2000
2500
3000
4000
ARD - 2 ARD - 3
Barmm x mm
Windowmm x mm
Cable
mm
5P1010P10
5P510P5
5P1010P10
5P510P5
5P1010P10
5P510P5
5P1010P10
5P510P5
5P1010P10
5P510P5
5P1010P10
-
-
-
-
-
-
-
-
-
-
-
-
30
82 - 32
2(80 x 10)
30
102 - 32
2(100 x 10)
15
15
15
15
5
5
5
5
30
30
30
30
15
15
15
15
15 5
15 5
15 5
15 5
15 5
15 5
15 5
15 5
15 5
15 5
15 515 5
15 5
15 5
30 15
30 15
30 15
30 15
30 15
30 15
30 15
30 15
30 15
30 15
30 1530 15
30 15
30 15
15 5
15 5
15 5
15 5
30 15
30 15
30 15
30 15
30 30
30 30
30 30 30 30
30 30
30 30
30 15
30 15
30 15
30 15
30 15
30 15
30 15
30 15
45 30
45 30
45 30
Class
Rated power VA
All types are protected against contact
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Tables and dimensions
Summation current transformers for low voltage
TA-2, TA-3, TA-4, TA-5, TA-6
- 08 - ALCE 2005 - 07
Important : Summation current transformers are
designed according to the ratios of the
main current transformers for summation.
Type 1
Type 2
Primary
A
TA-2
5+5 / 5
Rated power VA
Class 0,5
TA-3
5+5+5 / 5
TA-4
5+5+5+5 / 5
TA-5
5+5+5+5+5 / 5
Class 1
TA-6
5+5+5+5+5+5 / 5
Type1 Type 1 Type 2
5
10
5
10
30
30
1015
30
30
1530
1530
1530
510
1530
1530
1530
Connection diagram of summation current transformer ( Type TA-3 )One phase (R) of the three- phase A, B, C groups is shown in the picture
Type 2
R S T
R S T
Burden for measuring
K L
k l
K L
k l
K L
k l
AK AL BK BL CK CL
k l
R S T
A
B
C
Example :
Main currenttransformers :
Summation currenttranformers :
Result :
300A5
100A1
100A5
, ,
5 + 1 + 5
5
A
300 + 100 + 1005
: 100 Ratio
Burden of summation current transformerSummation currenttransformers
*
*
*
*
*
*
*
*
*
* Main current transformers
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Table and dimensions
Current transformer for low voltage
A125
- 09 -ALCE 2005 - 07
A125
A125
0,5 1,0
126 x 72
4(120 x 10)
30 45
60 100
30 45
45 60
Class
For secondary 5A or 1A
Rated power VA
Tip
Primarycurrent
A
5000
60007500
8000
Barmm x mm
Windowmm x mm
Indoor current transformerType A125cast resin, for busbar fastening
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Tables and dimensions
Current transformers for low voltage
CDS-20 - CDS-30
Types CDS-30
Primarycurrent
A
For secondary 5A or 1A
Cablemm
Windowmm x mm
Barmm x mm
23
30,5 x 10,5
30 x 10
Class
Rated power VA
0,5 1 3
Class
Class150
200
-
4
4
632
250
300
400
500
600
-
-
-
-
1,5
2
2
2,5
1,5
3
3
4
1,5
6
3
1,5
2
2
3
4
5
-
-
-
cable 23mm Bar 30x10mm
Type CDS-20
Primarycurrent
A
For secondary 5A or 1A
60
70
7580
100
120
125
150
200
Cable
mm
Windowmm x mm
Barmm x mm
50
17
20,5 x 5,5
20 x 5
Class
Rated power VA
0,5 1 3
-
-
-
-
-
-
-
2
-
-
-
-
-
--
1,5
2
2
2,5
4
1,5
1,5
2
22
1,5
3
3
4
6
Class Class
1,5
1,5
2
22
1,5
3
3
4
6
1,5
2
2
2,5
42
cable 17mm Bar 20x5mm
CDS-20
CDS-30
Class
1,5
3
4
5
86
3
4
5
2
Location : indoor
Standard, insulation level : IEC - 60044-1, DIN VDE 0414, Um: 0,72 kVFrequency : 50 - 60 Hz
Insulation : thermoplastic casing, insulation class E
Rated continious thermal current : 1,2 In
Secondary rated current : 5A or 1A
Security factor : FS5
S
S2
K P
CDS 3
Type
Notes
With currents lower than 50A it is advisable the use of a wound primary.With the use of the passing bar model (primary = 1 winding), 1 is possible to obtainlower current ratios, by passing the wire throw the window a number of turns equalto the ratio between the primary rated current of the transformer and the desiredprimary rated current.
Example :We have a 40 / 5A transformer and we want a 10 / 5A ratio
40 / 10 = 4 windings (of the primary) see drawing.