Current Transformer for Electricity Meter
> High permeability
> High permeability and low core loss
> High saturation flux density
> High linearity, low temperature dependence
> Good linearity of hysteresis loop
FEATURE
> High permeability
> High permeability and low core loss
> High saturation flux density
> High linearity, low temperature dependence
> Good linearity of hysteresis loop
BENEFIT
> Low phase error
> Low amplitude error
> Large current range
> Stability of phase error and amplitude error
> DC tolerance
Shape and Series
In electricity meter, the current transformer is required to has critical phase & amplitude errors for high accuracy without any compensation.
When DC occurs in the powerline, the phase error will become very high value with complex loads.
When strong external magnetic field go into current transformer, the core will very easily to get saturation which let the CT does not work anymore and finally brings incorrect measurement result.
Besides the critical requirements of phase & amplitude error without compensation, DC tolerance and anti-tampering are also the particular requirements for electricity meter CTs.
|
Part Code HP- |
Primary Current (A) |
Ratio (1: X) |
Accuracy (%) |
Phase Error (‘’) |
Burden Resistor Rb/Ω |
Inner Diameter φ/mm |
Length L/mm |
Height H/mm |
Width W/mm |
||
|
Ib Imax Imin |
|||||||||||
|
EM10-05/60-01 |
5.0 |
60.0 |
0.5 |
2000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-05/60-02 |
5.0 |
60.0 |
0.5 |
1000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-05/120-01 |
5.0 |
120.0 |
0.5 |
2000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-10/60-01 |
10.0 |
60.0 |
1.0 |
2500 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-10/60-02 |
10.0 |
60.0 |
1.0 |
2000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-10/60-03 |
10.0 |
60.0 |
1.0 |
1000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-15/90-01 |
15.0 |
90.0 |
1.5 |
3000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-15/90-02 |
15.0 |
90.0 |
1.5 |
1500 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-20/100-01 |
20.0 |
100.0 |
2.0 |
2500 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-20/100-02 |
20.0 |
100.0 |
2.0 |
2000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-20/100-03 |
20.0 |
100.0 |
2.0 |
1000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-20/120-01 |
20.0 |
120.0 |
2.0 |
4000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-20/120-02 |
20.0 |
120.0 |
2.0 |
2000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-20/120-03 |
20.0 |
120.0 |
2.0 |
1000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-30/120-01 |
30.0 |
120.0 |
3.0 |
3000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-30/120-02 |
30.0 |
120.0 |
3.0 |
2000 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM10-30/120-03 |
30.0 |
120.0 |
3.0 |
1500 |
0.1 |
＜15 |
5~10 |
7.0 |
30.0 |
30.0 |
21.0 |
|
EM11-05/60-01 |
5.0 |
60.0 |
0.5 |
2000 |
0.1 |
＜15 |
5~10 |
8.3 |
28.5 |
28.5 |
19.0 |
|
EM11-05/60-02 |
5.0 |
60.0 |
0.5 |
1000 |
0.1 |
＜15 |
5~10 |
8.3 |
28.5 |
28.5 |
19.0 |
|
EM11-10/60-01 |
10.0 |
60.0 |
1.0 |
2500 |
0.1 |
＜15 |
5~10 |
8.3 |
28.5 |
28.5 |
19.0 |
|
EM11-10/60-02 |
10.0 |
60.0 |
1.0 |
2000 |
0.1 |
＜15 |
5~10 |
8.3 |
28.5 |
28.5 |
19.0 |
|
EM11-10/60-03 |
10.0 |
60.0 |
1.0 |
1000 |
0.1 |
＜15 |
5~10 |
8.3 |
28.5 |
28.5 |
19.0 |
|
EM11-20/200-01 |
20.0 |
200.0 |
2.0 |
2500 |
0.1 |
＜15 |
5~10 |
11.0 |
34.0 |
34.0 |
25.5 |
|
EM11-20/200-02 |
20.0 |
200.0 |
2.0 |
2000 |
0.1 |
＜15 |
5~10 |
11.0 |
34.0 |
34.0 |
25.5 |
|
EM12-05/60-01 |
5.0 |
60.0 |
0.5 |
2000 |
0.1 |
＜15 |
5~10 |
7.0*2.0 |
21.0 |
21.0 |
9.5 |
|
EM12-05/60-02 |
5.0 |
60.0 |
0.5 |
1000 |
0.1 |
＜15 |
5~10 |
7.0*2.0 |
21.0 |
21.0 |
9.5 |
|
EM12-10/60-01 |
10.0 |
60.0 |
1.0 |
2000 |
0.1 |
＜15 |
5~10 |
7.0*2.0 |
21.0 |
21.0 |
9.5 |
|
EM12-10/60-02 |
10.0 |
60.0 |
1.0 |
1000 |
0.1 |
＜15 |
5~10 |
7.0*2.0 |
21.0 |
21.0 |
9.5 |
|
EM22-05/120-01 |
5.0 |
120.0 |
0.5 |
2000 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-15/90-01 |
15.0 |
90.0 |
1.5 |
3000 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-15/90-02 |
15.0 |
90.0 |
1.5 |
1500 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-20/100-01 |
20.0 |
100.0 |
2.0 |
2500 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-20/100-02 |
20.0 |
100.0 |
2.0 |
2000 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-20/100-03 |
20.0 |
100.0 |
2.0 |
1000 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-20/120-01 |
20.0 |
120.0 |
2.0 |
4000 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-20/120-02 |
20.0 |
120.0 |
2.0 |
2000 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-20/120-03 |
20.0 |
120.0 |
2.0 |
1000 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-30/120-01 |
30.0 |
120.0 |
3.0 |
3000 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-30/120-02 |
30.0 |
120.0 |
3.0 |
2000 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-30/120-03 |
30.0 |
120.0 |
3.0 |
1500 |
0.1 |
＜15 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-05/05-01 |
5.0 |
5.0 |
0.5 |
2500 |
0.05 |
＜15 |
5~20 |
6.0 |
21.0 |
24.0 |
14.5 |
|
EM22-05/05-02 |
5.0 |
5.0 |
0.5 |
2000 |
0.05 |
＜15 |
5~20 |
6.0 |
21.0 |
24.0 |
14.5 |
|
EM22-05/05-03 |
5.0 |
5.0 |
0.5 |
1000 |
0.05 |
＜15 |
5~20 |
6.0 |
21.0 |
24.0 |
14.5 |
|
EM23-01/01-01 |
1.0 |
1.0 |
0.1 |
500 |
0.05 |
＜15 |
5~20 |
/ |
24.0 |
25.0 |
16.0 |
|
EM23-1.5/06-01 |
1.5 |
6.0 |
0.15 |
1500 |
0.05 |
＜15 |
5~20 |
/ |
24.0 |
25.0 |
16.0 |
|
EM23-02/02-01 |
2.0 |
2.0 |
0.2 |
500 |
0.05 |
＜15 |
5~20 |
/ |
24.0 |
25.0 |
16.0 |
|
EM51-05/120-01 |
5.0 |
120.0 |
0.5 |
2000 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-15/90-01 |
15.0 |
90.0 |
1.5 |
3000 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-15/90-02 |
15.0 |
90.0 |
1.5 |
1500 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-20/100-01 |
20.0 |
100.0 |
2.0 |
2500 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-20/100-02 |
20.0 |
100.0 |
2.0 |
2000 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-20/100-03 |
20.0 |
100.0 |
2.0 |
1000 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-20/120-01 |
20.0 |
120.0 |
2.0 |
4000 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-20/120-02 |
20.0 |
120.0 |
2.0 |
2000 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-20/120-03 |
20.0 |
120.0 |
2.0 |
1000 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-30/120-01 |
30.0 |
120.0 |
3.0 |
3000 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-30/120-02 |
30.0 |
120.0 |
3.0 |
2000 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
|
EM51-30/120-03 |
30.0 |
120.0 |
3.0 |
1500 |
0.1 |
＜15 |
5~10 |
12.0 |
124.0 |
40.0 |
22.0 |
DC Tolerance
When electronic device has half-wave rectification circuit or SCR circuit which make the positive half wave and negative half wave are asymmetrical, DC component occurs and flees into grid.
When work with DC current, high permeability nanocrystalline core (SWFNA) will strongly reach the saturation. This behavior will bring incorrect measurement results.
To solve this trouble, a “combined core” of high permeability nanocrystalline-SWFNA and low permeability amorphous-SWFAM can be used. Normally the high permeability-SWFNA core works for the pure AC. when DC occurs, the high permeability-SWFNA reach saturation, then the measurement is carried by the low permeability-SWFAM.
This is very low-cost option for DC tolerance solution.
|
Part Code HP- |
Primary Current (A) |
Ratio (1: X) |
Accuracy (%) |
DC (A) |
Burden Resistor Rb/Ω |
Inner Diameter φ/mm |
Length L/mm |
Height H/mm |
Width W/mm |
||
|
Ib Imax Imin |
|||||||||||
|
EM10-05/60D-01 |
5.0 |
60.0 |
0.5 |
3000 |
0.1 |
 |
5~10 |
8.5 |
33.0 |
33.0 |
21.0 |
|
EM10-10/60D-01 |
10.0 |
60.0 |
1.0 |
2500 |
0.1 |
 |
5~10 |
8.5 |
33.0 |
33.0 |
21.0 |
|
EM10-10/100D-01 |
10.0 |
100.0 |
1.0. |
4000 |
0.1 |
 |
5~10 |
8.5 |
33.0 |
33.0 |
21.0 |
|
EM10-10/100D-02 |
10.0 |
100.0 |
1.0. |
2500 |
0.1 |
 |
5~10 |
8.5 |
33.0 |
33.0 |
21.0 |
|
EM10-20/100D-01 |
20.0 |
100.0 |
2.0 |
4000 |
0.1 |
 |
5~10 |
8.5 |
33.0 |
33.0 |
21.0 |
|
EM10-20/100D-02 |
20.0 |
100.0 |
2.0 |
2500 |
0.1 |
 |
5~10 |
8.5 |
33.0 |
33.0 |
21.0 |
|
EM21-05/60D-01 |
5.0 |
60.0 |
0.5 |
3000 |
0.1 |
 |
5~10 |
8.2 |
30.0 |
30.0 |
19.0 |
|
EM21-10/60D-01 |
10.0 |
60.0 |
1.0 |
2500 |
0.1 |
 |
5~10 |
8.2 |
30.0 |
30.0 |
19.0 |
|
EM22-10/80D-01 |
10.0 |
80.0 |
1.0 |
2500 |
0.1 |
 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM22-10/100D-01 |
10.0 |
100.0 |
1.0 |
2500 |
0.1 |
 |
5~10 |
13.0 |
33.0 |
39.0 |
15.0 |
|
EM51-10/80D-01 |
10.0 |
80.0 |
1.0 |
2500 |
0.1 |
 |
5~10 |
9.0 |
108.0 |
34.0 |
23.0 |
|
EM51-10/100D-01 |
10.0 |
100.0 |
1.0 |
2500 |
0.1 |
|
5~10 |
9.0 |
108.0 |
34.0 |
23.0 |
Anti-tampering
Besides the DC current, the external magnetic field also can make current transformer core reaching saturation which bring incorrect measurement result.
For preventing this problem, the anti-tampering version CT is recommended, which is encapsulated with a pair of metal caps produced via punching.
If a strong external magnetic field applied by a permanent magnet to CT from specific direction, one additional metal plate should be placed between the CT and the permanent magnetic.
TYPICAL RESISTIBILITY TO THE DC MAGNETIC FIELD
|
Permanent Magnet |
Shape=sphere Radius=3cm Residual Magnetism (Br)=1.0T |
||
|
Distance |
1.0cm |
2.0cm |
7.0cm |
|
Magnetic Flux Density |
0.28T |
0.145T |
0.02T |
|
Current Transformer Type |
Encapsulated + Metal Plate |
Encapsulated |
Normal |
|
Part Code HP- |
Primary Current (A) |
Ratio (1: X) |
Accuracy (%) |
Phase Error (‘’) |
Burden Resistor Rb/Ω |
Inner Diameter φ/mm |
Length L/mm |
Height H/mm |
Width W/mm |
||
|
Ib Imax Imin |
|||||||||||
|
EM11-05/60T-01 |
5.0 |
60.0 |
0.5 |
2500 |
0.1 |
＜15 |
5~10 |
7.5*2.0 |
35.0 |
35.0 |
27.5 |
|
EM11-10/60T-01 |
10.0 |
60.0 |
1.0 |
2500 |
0.1 |
＜15 |
5~10 |
7.5*2.0 |
35.0 |
35.0 |
27.5 |
|
EM11-10/80T-01 |
10.0 |
80.0 |
1.0 |
2500 |
0.1 |
＜15 |
5~10 |
8.5*2.5 |
40.0 |
40.0 |
28.5 |
|
EM11-10/100T-01 |
10.0 |
100.0 |
1.0 |
2500 |
0.1 |
＜15 |
5~10 |
8.5*2.5 |
40.0 |
40.0 |
28.5 |
Safety is always a challenge in electricity usage. For void injury or damage, the current transformer detecting zero-sequence/residual current is needed to residual current breaker, leakage protection switch, motor protection and alarm.
SUNBOW provide special series CT for application of protection, which is encapsulated with epoxy resin to have high protection class, work in wide frequency range(50-400Hz) , wide working temperature range (- 40~95℃), has high insulation (4KV/min, 1000MΩ/500Vdc).
|
Part Code HP- |
Primary Current Difference I/mA |
Output Voltage |
Connection |
Inner Diameter φ/mm |
Length L/mm |
Height H/mm |
Width W/mm |
|
PR12-10~400-01 |
10.0~400.0 |
0.1 |
L & N Powerline |
9.0 |
23.0 |
23.0 |
8.0 |
FAQ:
Q: Are you trading company or manufacturer?
A: We are professional manufacturer specialized in the design、development and production of new-type amorphous、nanocrystalline、silicon steel sheets and other magnetic materials and components.
Q: What’s your production capacity ?
A: The annual production capacity of amorphous&nanocrystalline ribbon is 600 tons;
The annual production capacity of power electronic core is 35 million;
C-type iron core annual production capacity of 240 tons;
The annual production capacity of reactors is 50,000;
The annual production capacity of precision transformers is 40 million;
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1. Tell us what you need,please call 021-63306968 Or send email to :sales@sunbowgroup.com
We design & produce goods based on clients' specifications & drawing:
1.Bare core size, Size finished
2.performance requestment
2. Get solution & quote
We will work on the best solution and provide primarily specification& quote for your review.
3. Sample production and mass production
We will start mass production after customer confirmation and validation of samples.
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