Merlin Gerin NS250N Compact Circuit Breaker – 3 Pole, 250 Amps
The Merlin Gerin NS250N is a top-performance Molded Case Circuit Breaker (MCCB) with high reliability, designed to withstand the demanding environment of industrial power systems and marine vessel switchboards. This 3-pole, 250-amp circuit breaker provides reliable overload and short-circuit protection in a compact, space-saving form that helps you save valuable panel space.
The NS250N series is a crucial part of the modern low voltage distribution networks, providing the best continuity of service and limiting the damage to the downstream equipment. It is the electrical insulation of choice for the world’s marine engineers and electrical contractors owing to its sophisticated electrical insulation and tough mechanical engineering.
Model Details:
- Manufacturer: Merlin Gerin / Schneider Electric
- Base Frame Model: Compact NS250N
- Standard Thermal-Magnetic Unit (TM-D) MPN: 31620 / 31631
- Electronic Trip Unit (STR22SE) MPN: 31770
- Country of Origin: India
Merlin Gerin 31620 / 31631 Specifications:
| Parameter | Specification |
|---|---|
| Number of Poles | 3P (3 Protected Poles) |
| Rated Current (In) | 250 Amps at 40°C |
| Rated Operational Voltage (Ue) | 690 V AC (50/60 Hz) / 750 V DC |
| Rated Insulation Voltage (Ui) | 750 V AC conforming to IEC 60947-2 |
| Rated Impulse Withstand Voltage (Uimp) | 8 kV |
| Breaking Capacity Code | N (Standard Breaking Capacity) |
| Ultimate Short-Circuit Breaking Capacity (Icu) | 36 kA at 380/415 V AC 35 kA at 440 V AC 8 kA at 660/690 V AC |
| Rated Service Breaking Capacity (Ics) | 100% of Icu (conforming to IEC 60947-2) |
| Trip Unit Technology | Thermal-Magnetic (TM-D) or Electronic (STR22SE) |
| Mechanical Durability | 20,000 cycles |
| IP Protection Rating | IP40 conforming to IEC 60529 |
| Dimensions (H x W x D) | 161 mm x 105 mm x 86 mm |
Applications
- Marine Main Switchboards (MSB): Provides a high integrity incomer or heavy feeder protection unit in merchant marine vessels and offshore installations.
- Industrial Sub-Distribution Boards: Protects downstream industrial equipment and branch electrical circuits from large fault currents.
- Motor Protection Control Protects high duty electrical motors and sub-assembly starters from damaging short-circuit currents.
- Commercial Building Infrastructure: Offers dependable low-voltage line isolation and infrastructure network distribution protection.
- DC Control Networks: Configurable for 750 V DC utility applications such as solar sub-stations and emergency backup batteries.
30 DAYS RETURN POLICY
RETURNS ACCEPTED IN 30 DAYS. BUYER PAYS THE SHIPPING CHARGES. RESTOCKING FEES 20%.
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