Product Overview
The BZM series features a modular design, offering a range of protection options such as thermal-magnetic, magnetic-only, and earth-leakage protection.
Different protection units can be selected based on the specific protection requirements:
● Protection of power distribution cables supplied by transformers;
● Suitable for motor overload and short-circuit protection;
● Features low trip thresholds, making it suitable for protecting generators or long cable runs.
Technical parameters
| Rated current of trip unit In(A) | Rated current of trip unit In(A) | Rated current of trip unit In(A) | 10,16,20,25,32,40,50,63,80,100,125,140,160 | 100,125,140,160,180,200,225,250 | 250,315,350,400,500,630 |
|---|---|---|---|---|---|
| Rated insulation voltage (V) | Rated insulation voltage (V) | Ui | AC1000 | AC1000 | AC1000 |
| Rated impulse withstand voltage (kV) | Rated impulse withstand voltage (kV) | Uimp | 8 | 8 | 8 |
| Rated operational voltage (V) | Rated operational voltage (V) | Ue | AC400 | AC400 | AC400 |
| Circuit breaker type | Circuit breaker type | Circuit breaker type | N | N | N |
| Rated ultimate short-circuit breaking capacity (kV) | Icu AC 50/60Hz,400V | 400V | 50 | 50 | 50 |
| Rated service short-circuit breaking capacity (kV) | Ics AC 50/60Hz,400V | 400V | 50 | 50 | 50 |
| Rated ultimate short-circuit making capacity (kV) | Icm AC 50/60Hz,400V | 400V | 105 | 105 | 105 |
| Utilization category | Utilization category | Utilization category | A | A | A |
| Operating cycle (maintenance-free) | Mechanical | 25000 | 25000 | 10000 | |
| Operating cycle (maintenance-free) | Electrical | AC400V | 10000 | 10000 | 8000 |
| Rated residual operating current IΔn(A) | AC type residual current protection | RSU type | 0.03/0.05/0.1/0.3 | 0.03/0.05/0.1/0.3 | — |
| Rated residual operating current IΔn(A) | AC type residual current protection | RNU type / RSX type / RNX type | 0.05/0.1/0.3 | 0.05/0.1/0.3 | — |
| Rated residual operating current IΔn(A) | AC type residual current protection | RSV type / RNV type / RSY type / RNY type | 0.1/0.3/0.5/1.0 | 0.1/0.3/0.5/1.0 | 0.1/0.3/0.5/1.0 |
| Rated residual non-operating current | Rated residual non-operating current | IΔno | 1/2 IΔn | 1/2 IΔn | 1/2 IΔn |
| Rated residual short-circuit making (breaking) capacity | Rated residual short-circuit making (breaking) capacity | IΔm | 1/4 Icu | 1/4 Icu | 1/4 Icu |
