Compact & High-Performance Protection: The NQCM1B circuit breaker features a compact design with high breaking capacity, short flashover, and anti-vibration properties, making it ideal for both land and marine applications.
Wide DC Voltage Range (12V–120V): Suitable for power distribution networks with DC voltages from 12V to 120V, including 24V, 48V, 72V, and 96V, ensuring versatile battery circuit protection.
Robust Overload & Short-Circuit Protection: Protects circuits and equipment from overload, short circuit, and undervoltage faults while supporting infrequent motor starts and line switching.
Flexible Installation (Vertical/Horizontal): Can be installed both vertically and horizontally, offering adaptability for diverse electrical setups in constrained spaces.
Compliant with IEC60947-2 Standards: Meets international safety and performance benchmarks, ensuring reliable operation in demanding environments up to 1250A.
Product Overview
The NOCM1(B) series plastic case DC circuit breaker is an advanced protection device designed for battery circuits and DC power distribution networks. With a wide voltage range (12-120V DC) and current ratings up to 1250A, this breaker features high breaking capacity, compact size, and vibration resistance, making it ideal for both land and marine applications.
Key Features
Wide DC voltage range: 12V, 24V, 36V, 48V, 60V, 72V, 96V, 120V
High breaking capacity: up to 70kA (NCVA)
Multiple protection functions: overload, short circuit, and undervoltage
Flexible installation: vertical or horizontal mounting options
Multiple pole configurations: 1P, 2P, 3P, 4P
Compliant with IEC60947-2 standard
Technical Specifications
| Parameter | Specification |
|---|---|
| Rated Working Voltage | 12-120V DC |
| Rated Current | Up to 1250A |
| Breaking Capacity Level | L (25kA), M (50kA), H (70kA) |
| Rated Impulse Withstand Voltage | 8kV |
| Mechanical Life | 2500 operations |
| Electrical Life | 800 operations |
| Installation Options | Panel front fixing, back inserting |
Protection Features
| Protection Type | Description |
|---|---|
| Overload Protection | Protects against excessive current flow |
| Short Circuit Protection | Instantaneous trip for high fault currents |
| Undervoltage Protection | Trips when voltage drops below threshold |
| Prepaid Meter Special Release | Works with AC230V/50Hz, trips when control signal is cut |
Accessories and Options
| Accessory | Description | Available For |
|---|---|---|
| Undervoltage Release | Trips when voltage drops below set value | All pole configurations |
| Alarm Contact | Signals trip condition | All pole configurations |
| Electric Operating Mechanism | Remote operation capability | All models |
| Auxiliary Contacts | Status indication | All pole configurations |
Applications
Battery circuit protection in telecom systems
DC power distribution in marine applications
Solar power systems
Electric vehicle charging infrastructure
Industrial DC power systems
Installation Options
Vertical or horizontal mounting
Panel front fixing
Panel back inserting
Multiple wiring configurations
Ordering Information
When ordering, please specify:
Product model (NOCM1-XXX)
Rated current
Number of poles (1P, 2P, 3P, 4P)
Breaking capacity level (L, M, H)
Required accessories (if any)
Example: NOCM1-250, 250A, 2P, M breaking capacity, with undervoltage release