ZCT205 Lead Wire Type three phase current to single phase current transformer
Electrical Specification
(Customized is available)
| Rated Current | 50A |
| DC Resistance at 25℃ | 44±5Ω |
| Dielectric Withstanding Voltage(Hi-pot) | 2500Vrms |
| Output Voltage Vo | ≥17mV |
The use and working principle of zero phase current transformer
Zero-sequence current transformer: This is a feature that the zero phase current value of the single-phase grounding fault line is larger than that of the non-fault circuit. The current transformer is used to take out the zero-sequence current signal to make the relay act, so as to achieve selective tripping or sending a signal installation.
Features: For cable lines, the iron core of the cable passing through the converter (zero-sequence converter) is the primary winding, and the secondary winding is wound around the iron core and connected in series with the current relay. During normal operation or three-phase symmetrical short-circuit, there is no zero-sequence current; when single-phase is grounded, there is a grounded capacitive current passing through the iron core, and zero-sequence current appears on the secondary side, which makes the relay act.
It is that both the phase wire and the neutral wire of the cable pass through the core.
| Item | Rated Current(A) | Output Voltage Vo(mv) | Test Conditions | Over Leakage Characterstics | Temperature Characteristics -35~80℃ | Dimensions (mm) |
||
|---|---|---|---|---|---|---|---|---|
| Click PN For Details | ID | OD | HT | |||||
| ZCT201 | 30 | 4-5.1 | lin=10mA RL=510 | -10%~0% | 10%Max | 5.9 | 16 | 6.5 |
| ZCT202 | 30 | 5.1-6 | lin=8mA RL=750 | -10%~0% | 10%Max | 5.8 | 15.2 | 6.1 |
| ZCT203 | 50 | 17-21 | lin=22.5mA RL=1k | -10%~0% | 10%Max | 9.2 | 21 | 7.3 |
| ZCT204 | 30 | 12-15 | lin=22.5mA RL=1k | -10%~0% | 10%Max | 9.8 | 20.6 | 6.5 |
| ZCT205 | 30 | 12.5-15.5 | lin=8mA RL=4.7k | -10%~0% | 10%Max | 9.3 | 21.3 | 7.2 |
| ZCT206 | 50 | 17-21 | lin=22.5mA RL=1k | -10%~0% | 10%Max | 12.3 | 26 | 10 |
| ZCT207 | 30 | 7.5-8.5 | lin=25mA RL=1k | -10%~0% | 10%Max | 15.4 | 29.8 | 10 |
| ZCT208 | 60 | 10.2-12.5 | lin=20mA RL=680 | -10%~0% | 10%Max | 7.2 | 19.4 | 7.7 |
| ZCT209 | 50 | 8-11.2 | lin=11.25mA RL=1k | -10%~0% | 10%Max | 7 | 17.2 | 7 |
| ZCT210 | 50 | 8-11.2 | lin=11.25mA RL=1k | -10%~0% | 10%Max | 6.8 | 16.9 | 7.9 |
| ZCT211 | 50 | 8-11.2 | lin=11.25mA RL=1k | -10%~0% | 10%Max | 10.6 | 25.4 | 8 |
| ZCT212 | 60 | 10.2-12.5 | lin=20mA RL=680 | -10%~0% | 10%Max | 11 | 23.5 | 8 |
| ZCT213 | 60 | ≥300 | lin=25mA RL=1k | -10%~0% | 10%Max | 9.4 | 23.8 | 12.7 |
| ZCT218 | 60 | 10.2--12.5 | lin=25mA RL=680 | -10%~0% | 10%Max | 7.5 | 18.9 | 7.6 |
| ZCT220 | 60 | ≥300 | lin=25mA RL=47k | -10%~0% | 10%Max | 10.1 | 24 | 11.5 |
| ZCT225 | 60 | ≥300 | lin=25mA RL=47k | -10%~0% | 10%Max | 10.9 | 25.5 | 9 |
| ZCT401 | 100 | 17-21 | lin=22.5mA RL=1k | -10%~0% | 10%Max | 15 | 29.2 | 10 |
| ZCT402 | 100 | 6.3-7.5 | lin=20mA RL=370 | -10%~0% | 10%Max | 17.5 | 35.9 | 8.8 |
| ZCT403 | 250 | 17-21 | lin=22.5mA,RL=1k | -10%~0% | 10%Max | 29 | 51 | 12 |
| ZCT404 | 250 | 17-21 | lin=22.5mA,RL=1k | -10%~0% | 10%Max | 32 | 55.6 | 12 |
| ZCT405 | 250 | 17-21 | lin=22.5mA,RL=1k | -10%~0% | 10%Max | 42 | 80*69 | 20 |
| ZCT406 | 630 | 17-21 | lin=25mA,RL=1k | -10%~0% | 10%Max | 51.3 | 84 | 26 |
| ZCT407 | 800 | 17-21 | lin=22.5mA,RL=1k | -10%~0% | 10%Max | 51 | 96*89 | 23 |
| ZCT408 | 100 | 125-150 | lin=500mA,RL=150 | -10%~0% | 10%Max | 19 | 36 | 11.5 |
| ZCT409 | 225 | 125-150 | lin=500mA,RL=150 | -10%~0% | 10%Max | 24 | 42 | 12 |
| ZCT410 | 400 | 125-150 | lin=500mA,RL=150 | -10%~0% | 10%Max | 43 | 90*74 | 16 |
| ZCT411 | 800 | 120-151 | lin=500mA,RL=150 | -10%~0% | 10%Max | 53 | 96*89 | 23 |