Mini Current transformer for GFCI

Current transformer for GFCI
* Compatible with UL943
* Precision and steady output characteristics;
* Close to zero load shift;
* Excellent characteristics in balance and temperature;



current transformer for GFCI manufacturer ZG955


The GFCI component must consist of ZCT and GNT coils. The ZCT coil is used to detect a small ground fault difference current between the live line and the earth line .The GNT coil is used to detect an over-current caused by arcing or short circuit of the cable fire or excessive current change. Current transformer is mainly used in GFCI sockets or plugs used in near-water environments such as kitchens, bathrooms, car washes, and arc fault breaker sockets or plugs for air conditioners.


Technical Specification:

Rated Current

20 A

DC Resistance at 25℃

ZCT
GNT

36±5Ω
9.2± 2Ω

Dielectric Withstanding   Voltage(Hi-pot)

 1500 V AC 1 min

Output Voltage Vo

ZCT
GNT

6.3-6.8mV
≥60mH



Specification & Dimension:

Model No.

Electrical Characteristics

Dimension(Unit:mm/inch)

Standard PN

Ip(A)

I(mA)

Rl(Ω)

ZCT:V(mV)

A

B

C

D

E

F

Pin

f(Hz)

u(V

GNT:Ls(mH)


523

20

5

1K

3.5-4.2

16

17.85

11.5

5

11

1.5

□0.64

Z/G523P100

1.0K

1.0V

90-140

0.630

0.703

0.453

0.197

0.433

0.059

0.025

524

20

5

1K

3.5-4.2

17.2

11

3.6

14

18.6

7

□0.64

Z/G524P100

1.0K

1.0V

90-140

0.677

0.433

0.142

0.551

0.732

0.276

0.025

530

30/50

5

1K

4.1±0.5

38.00

19.80

16.50

42.60

2.12

6.18

□0.64

Z/G530P100

1.0K

1.0V


100±25

1.496

0.780

0.650

1.677

0.083

0.243

0.025

537

20/30

5

1K

3.5-4.2

16

20.5

15.8

13.3

15.2

3.2

□0.64

Z/G537P100

1.0K

1.0V

90-140

0.630

0.807

0.622

0.524

0.598

0.126

0.025

542

20/30

5

1K

3.5-4.2

17.465

5.5

23.4

11.1

19.9

7.5

0.8

Z/G542P100

1.0K

1.0V

90-140

0.688

0.217

0.921

0.437

0.783

0.295

0.031

556

20

5

1K

3.5-4.2

16.9

5.21

10.5

3.18

6.36

17.4

□0.64

Z/G556P100

1.0K

1.0V

90-140

0.665

0.205

0.413

0.125

0.250

0.685

0.025


GFCI Current Transformer Application:      

√ Sensing toroid using to sense minimal differential current caused by the ground fault
√ Grounded neutral toroid using to sense unexpected excessive current change or overload current caused by the arc resulted from the fire or the short circuit

√ GFCI current transformer series are mainly applied to GFCI plugs, GFCI receptacles,connecting with various electric equipments, such as EV charger,Air-conditioner,Washing machine,Water heater, Car-washing equipment etc

√ Currently,our GFCI CTs are widely used for floor heating and HVAC controls.

√ And also these assemblies are applied to the AFCI used in the air-condition




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