CHINT Electric Circuit Breaker NM1-400S/3300 315A is a circuit breaker: it opens on overload or short circuit, protecting the generator, the cabling and the downstream load.
A breaker should not trip in normal service. If it opens at the usual load, the cause is nearly always a mis-set trip, loose terminals generating heat, or a breaker sized below the real set current.
Specifications and compatibility
- Brand
- CHINT
- Type
- Caja moldeada
- Electrical type
- Moulded Case Circuit Breaker (MCCB)
- Amperage
- 315 A
- Pole
- 3P
How to verify before ordering
- Match rated current, trip curve (B/C/D) and breaking capacity to the circuit it protects.
- Check whether the panel uses a moulded case, DIN rail or open-frame breaker, and how many poles.
- Confirm the kA rating: fitting one below the original leaves the panel unprotected against short circuit.
- Declared make or line: CHINT. If your equipment carries another make, the part may not be equivalent.
Frequently asked questions
Why does the breaker trip when the set starts?
The motor inrush or the transformer magnetising current crosses the instantaneous threshold. It is solved with the right curve (type D or a short-delay setting), not by raising the rating without recalculating the cable.
Can I replace it with a higher amperage one?
Not without recalculating cable and alternator. A larger breaker leaves the cable unprotected and pushes the damage into the winding.
Related parts
- BREAKER CHINT ELECTRIC NM1-400S/4300B 350A 3P+N
- BREAKER CHINT ELECTRIC NM1-630S/4300B 500A 3P+N
- BREAKER CHINT ELECTRIC NXBLE-63 40A 3P
- BREAKER CHINT ELECTRIC NXB-63 20A 1P
- BASE PORTAFUSIBLE UNIPOLAR RT16-00 (NT00)
See the spare parts catalogue or request a quotation quoting the equipment reference. Third-party trademarks are cited for identification purposes only.
Specifications
| Characteristics | |
|---|---|
| Amperage (A) | 315 A |
| Pole | 3P |
| Type | Moulded case |
| Brand | CHINT |
| Electrical power | |
|---|---|
| Electrical | Moulded-case circuit breaker |