MINIATURE CIRCUIT BREAKER NB1-63
1.1 Function
- protection of circuits against short-circuit currents,
- protection of circuits against overload currents,
- switch,isolation.
- NB1 circuit-breakers are used in domestic installation,
- as well as in commercial and industry electrical
- distribution systems.
1.2 Selection
- Technical data of the network at the point considered:
- short-circuit current at the circuit-breaker installation point,
- which must always be less than the breaking capacity of
- this device,network normal voltage.
- Tripping curves:
- B curve (3-5In)
- protection for people and big length cables in TN and IT
- systems.
- C curve (5-101n)
- protection for resistive and inductive loads with low inrush
- current.
- D curve(10-141n)
- protection for circuits which supply loads with high inrush
- current at the circuit closing
- (LV/LV transformers, breakdown Iamps).
- 1.3 Approvals and certificates
- Detailed information, please refer to Certificates Table
- on the last page.
| Product type | Miniature Circuit Breaker (MCB) |
| Series Name of Product | NB1-63 |
| Rated in current (A) | 1,2,3,4,6,10,16,20,25,32,40,50,63 |
| Poles | 1P, 2P, 3P, 4P |
| Rated Voltage Ue (V) | 230/400V |
| Rated frequency | AC 50/60 Hz |
| Rated breaking capacity (A) | 6000 |
| Standard | IEC/EN 60898 |
| Brand of Product | CHINT |
