General Introduction
LJ-2 / LJ-4 / LJ-7 zero-sequence current transformer is an in-house product for grounding protection of generators, synchronous cameras or motors in grounding current systems. The relay used with the current transformer is DD-11 / 0.2. When there is a ground fault in the protection range, the fault current generates zero sequence current through the cable in the secondary circuit of the transformer to make the relay operate.
Technical Specification
| Item No | Connection Resisitance(Ω) | Relay Starting Current(A) | Sensitivity(A) | Relay Scale Vaule(A) | Rated Current Ratio(A) |
| LJ-2 / LJ-4 / LJ-7 | 1 | 0.1 | 6-10 | 0.1-0.2 | 30/1 |
Dimension
Wiring Principle
Production
Normal working/installation conditions
1. Installation sites: Indoor
2. Ambient temperature : (-5~40)ºC
3. Ambient humidity: ≤80%
4. Altitude: ≤1000m
5. Atmospheric conditions: no serious impurity in the atmosphere.
Ordering instructions
When the customer ordering, must provide the following information:
1product model and Install the bus width;
2, current ratio;
3, rated output, and the corresponding accurate level;
4, if you have special requirements, can be customized consultation with the manufacturer.