Voltage type leakage circuit breaker for low voltage neutralgrounding of transformer. The utility model is characterizedin that when a person gets an electric shock, a relatively highvoltage is generated on the zero line to the ground, causingthe relay to move, and the power switch is tripped.
Current type residual current circuit breaker is mainly used for neutral point earthing low-voltage distribution system of transformer. The utility model is characterized in that when a person gets an electric shock, a leakage current is detected by a zero sequence current transformer, so that the relay is operated and the power switch is switched off.
Residual current (leakage) protection, residual current gear can be adjusted online, and delayed and non-delayed types can be selected at will;
●with primary reclosing function;
● Automatic tracking, automatic adjustment of the gear according to the residual current of the line, ensuring the commissioning rate and reliability of the product;
●Long-delay, short-delay and instantaneous three-stage protection, current can be set, with electronic decoupling, independent of power supply voltage;
●High breaking capacity to ensure the reliability of line short circuit protection;
● High-current instantaneous decoupling function, when the circuit breaker is closed and encounters a short-circuit high current (≥20Inm), the circuit breaker is directly decoupled by
electromagnetic decoupler mechanism is directly decoupled;
● Over-voltage protection, under-voltage protection, phase failure protection;
● Leakage non-disconnecting alarm output function;
| Electrical features |
Certificate | CE | |
| Thermo-magnetic release characteristic | C,D | ||
| Rated current In | A | 40,50,63,80,100,125 | |
| Rated voltage Ue | V | 230/400 | |
| Rated sensitivity I△n | A | 0.03,0.1,0.3 | |
| Rated residual making and breaking capacty I△m | A | 1,500 | |
| Rated short-circuit capacity lcn | A | 6000(4~40A);4500(50,63A) | |
| Break time under I△n | S | ≤0.1 | |
| Rated frequency | Hz | 50/60 | |
| Rated impulse withstand voltage Uimp | V | 4,000 | |
| Dielectric TEST voltage at ind.Freq.for 1min | kV | 2 | |
| Insulation voltage Ui | 600 | ||
| Pollution degree | 2 |
