Smart meter current transformer for GFCI ZG964
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
|
3.3±5Ω
9.2± 2Ω
|
|
Dielectric Withstanding Voltage(Hi-pot)
|
1500 V AC 1 min
|
|
Output Voltage Vo
|
ZCT
GNT
|
3.3-4.0mV
|
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
