ZG523 Current Transformer For GFCI
Electrical Specification
(Customized is available)
| Rated Current | 20 A | |
| DC Resistance at 25℃ | ZCT GNT | 45±5Ω 5.7± 2Ω |
| Dielectric Withstanding Voltage(Hi-pot) | 1500 V AC 2 Sec | |
| Output Voltage Vo | ZCT GNT | 3.4-4.1mV ≥80mH |
Differential current transformer GFCI (ie residual current transformer) is an important part of the leakage switch, and it is directly related to the sensitivity, reliability and stability of the leakage switch.
As mentioned above, when the power grid is in normal operation, the power line (phase line and neutral line) passing through the transformer, the vector sum of each instantaneous current is zero, so there is no induced potential in the secondary winding of the transformer according to the law of electromagnetic induction.
When electric shock leakage occurs, the instantaneous vector sum of the current in the main circuit is not equal to zero, which is the residual current, which causes the secondary winding of the transformer to generate an induced potential. The greater the leakage current, the greater the induced potential of the secondary winding.
| Item | Rated Current(A) | Output voltage 5mA/1KΩ | Inductance 1KHz/1V | Balance characterstics 20A/1KΩ | Frequency Hz | Dimensions(mm) | ||
|---|---|---|---|---|---|---|---|---|
| Click PN For Details | ID | OD | HT | |||||
| ZG522 | 20 | 3.3~4.0mV | 110mH REF | 0.4mVmax | 10%Max/25%mAX | 5.5 | 17.1 | 11.1 |
| ZG523 | 20 | 3.3~4.0mV | 110mH REF | 0.4mVmax | 10%Max/25%mAX | 5.6 | 16.2 | 11.5 |
| ZG537 | 20 | 3.3~4.0mV | 110mH REF | 0.4mVmax | 10%Max/25%mAX | - | - | 15.8 |
| ZG955 | 20 | 3.3~4.0mV | 110mH REF | 0.4mVmax | 10%Max/25%mAX | 5.5 | 17.1 | 11.1 |
| ZG961 | 20 | 3.3~4.0mV | 110mH REF | 0.4mVmax | 10%Max/25%mAX | 5.6 | 16.6 | 11.5 |
| ZG964 | 20 | 3.3~4.0mV | 110mH REF | 0.4mVmax | 10%Max/25%mAX | 4.8 | 21.9 | 11.6 |