CHNT NS2-25 Series Motor Protection Circuit Breakers
CHNT NS2-25 series motor protection circuit breakers integrate short-circuit, overload and phase-loss three-in-one protection functions. They directly control and protect small three-phase motors, widely used in mechanical equipment, small control boxes, conveyor systems and fan & pump control circuits. The series covers complete adjustable current specifications and optional auxiliary contact, undervoltage trip and extended mounting accessories.
Model Parameters & Features Table
| No. | Model | Category | Key Features | Application |
|---|---|---|---|---|
| 1 | NS2-25 0.1-0.16A | Motor Protection MCB | Frame 25A, adjustable protection current 0.1~0.16A, triple protection | Ultra-small micro motor, precision testing instrument protection |
| 2 | NS2-25 0.16-0.25A | Motor Protection MCB | 25A frame, setting range 0.16~0.25A, compact DIN rail body | Mini drive motor, miniature laboratory equipment loop |
| 3 | NS2-25 0.25-0.4A | Motor Protection MCB | Adjustable 0.25~0.4A, sensitive overload tripping curve | Tiny exhaust fans and micro water pump protection |
| 4 | NS2-25 0.4-0.63A | Motor Protection MCB | Current range 0.4~0.63A, built-in phase loss detection | Light auxiliary machinery low-power motor safeguard |
| 5 | NS2-25 0.63-1A | Motor Protection MCB | 0.63~1A adjustable dial, low temperature drift design | Small conveying equipment three-phase motor control |
| 6 | NS2-25 1-1.6A | Motor Protection MCB | Setting range 1~1.6A, short-circuit instant trip function | General small fan and circulating pump integrated protection |
| 7 | NS2-25 1.6-2.5A | Motor Protection MCB | 1.6~2.5A mainstream small current specification | Packaging, printing small unit motor control cabinet matching |
| 8 | NS2-25 2.5-4A | Motor Protection MCB | Adjustable 2.5~4A, anti-vibration industrial grade structure | Small air compressor, auxiliary processing equipment motor |
| 9 | NS2-25 4-6.3A | Motor Protection MCB | 4~6.3A wide adjustment range, stable full-load performance | Injection molding auxiliary equipment overload & short-circuit protection |
| 10 | NS2-25 6-10A | Motor Protection MCB | Setting range 6~10A, strong anti-ablation contact system | Workshop conventional small mechanical equipment main switch |
| 11 | NS2-25 9-14A | Motor Protection MCB | 9~14A medium current segment, rapid phase loss cutoff | Multi-station small automation production line motor control |
| 12 | NS2-25 13-18A | Motor Protection MCB | 13~18A high current segment of 25 frame, large breaking capacity | Medium small mixing and stirring machinery integrated protection |
| 13 | NS2-25 17-23A | Motor Protection MCB | Adjustable range 17~23A, reinforced arc extinguishing chamber | High-power small three-phase fan and pump equipment |
| 14 | NS2-25 20-25A | Motor Protection MCB | Max adjustable current of NS2-25 frame 20~25A | Heavy-duty small mechanical equipment main power protection |
| 15 | NS2-25/AE11 | Auxiliary Contact Accessory | AE11 auxiliary contact module, 1NO+1NC signal feedback | Fault signal transmission, PLC interlock and status indication |
| 16 | NS2-25/AU11 | Undervoltage Trip Accessory | AU11 undervoltage release, auto trip under low grid voltage | Equipment requiring power-off protection during grid voltage drop |
| 17 | NS2-25X | Extended Mount Base | NS2-25 dedicated extended installation base, distance extension | Cabinets needing increased wiring operation space layout |
Product Overview
CHNT NS2-25 series is an integrated motor protection circuit breaker with a 25A frame current. It replaces the combination scheme of contactor + thermal relay for small motors, realizing one-device multi-protection to save cabinet space and reduce installation cost.
Core Performance
- Triple integrated protection: Overload thermal trip, short-circuit instantaneous magnetic trip and phase-loss imbalance protection, effectively avoid motor burnout caused by stall, overload, short circuit and phase loss.
- Stepless adjustable current dial: Users can accurately set the protection current according to the actual rated current of the matched motor, wide coverage from 0.1A to 25A.
- Complete optional accessories: AE11 auxiliary contact for equipment operation/fault signal output; AU11 undervoltage trip for voltage drop safety lockout; NS2-25X extended base to expand wiring operation space.
- Standard DIN rail mounting, flame-retardant insulating housing, small overall size, suitable for compact control boxes and centralized multi-motor distribution systems.
Application Scenarios
This series complies with IEC/GB standards, widely applied in packaging machinery, food processing equipment, HVAC fans, small water pump stations, automation conveying lines and building auxiliary power control systems. It is an economical and simplified protection solution for low-power three-phase asynchronous motors.
CHNT NS2-25 Series Motor Protection Circuit Breakers
