Description
SMNSX Molded Case Circuit Breaker (MCCB) Product Description
The SMNSX series molded case circuit breakersare advanced electrical protection devices designed for AC circuits with frequencies of 50/60 Hz. With a rated working voltage up to 690V ACand a rated current range from 16A to 630A, the NSX series is ideal for industrial, commercial, and residential applications. It provides reliable distribution of electrical energy while safeguarding circuits against overload, short-circuit, and undervoltage faults. Additionally, it supports infrequent switching operationsand motor protection in diverse environments.
Key Features
- Compact and Durable Design
- Space-saving construction for efficient panel integration.
- Robust materials ensure long-term reliability in harsh conditions.
High Performance and Safety
- Short arcing distanceminimizes risk during arc faults.
- Large contact spacingenhances insulation performance and longevity.
Compliance and Versatility
- Meets international standardsIEC 60947-2andUL 489.
- Compatible with thermal-magnetic and electronic trip units for flexible protection settings.
- Available in3P (three-pole)and4P (four-pole)configurations.
Working Environment Requirements
To ensure optimal functionality and safety:
Altitude: Maximum installation height of2000 meters above sea level(consult
Operatinmanufacturer for higher altitudes).
Temperature:
g range:-25°C to +70°C(standard type).
Average ambient temperature over 24 hours:≤ 40°C.
Adjustments required for extreme temperatures.
Environmental Conditions:
Non-corrosive, non-explosive atmosphere.
Protection from direct exposure to rain, snow, and mechanical vibrations.
Humidity:Relative humidity≤ 95%(non-condensing).
Installation Orientation:
Mounting inclination≤ 5°on all sides.
Power terminals connected to theupper side, load terminals to thelower side.
Specifications
- Number of poles: 3P / 4P
- Frame current: 100A – 250A
- Tripping methods: Thermal-magnetic type / Micro-logic electronic type
- Standards complied with: IEC 60947-1, IEC 60947-2
| Rated Working Voltage (Ue) | 240V, 400V, 415V, 500V, 690V AC |
| Rated Insulation Voltage (Ui) | 800V (standard type), 1000V (high insulation type) |
| Rated Impulse Withstand Voltage (Uimp) | 6kV (standard), 8kV (high type) |
| Trip Unit Types | –Thermal-magnetic(fixed settings for standard applications) |
| –Electronic (E-Trip)(adjustable settings for precision protection) | |
| Application Types | –Distribution type(for general power distribution) |
| –Motor protection type(for motor circuits with overload protection) | |
| Breaking Capacity | –Standard type (S): Up to 36 kA (400V) |
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