Description
SMEZC Series Molded Case Circuit Breakers are medium – and high – voltage protection devices suitable for industrial and commercial power distribution systems. Specifically designed for AC 50/60Hz circuits, the rated voltage can reach up to 690V AC. This series of circuit breakers integrates thermal – magnetic tripping technology and current – limiting function, and is widely used in power distribution protection, motor control, and terminal equipment protection scenarios, providing reliable overload, short – circuit, and undervoltage protection.
Core Performance Features
High Reliability and Safety
- The use of thermal – magnetic trippers enables rapid response and precise protection, preventing circuit overload and short – circuit faults.
- The double – insulation design ensures the safety of operators during normal operation.
- The standard protection level is IP20, and it can be upgraded to IP54 when installed in an electrical cabinet with special accessories.
Compact Structure and Flexible Installation
- The fixed – type installation design saves space in the power distribution cabinet and facilitates dense layout.
- It supports vertical or horizontal installation to adapt to different installation environment requirements.
- The manual operating handle intuitively indicates the on – off state of the circuit breaker.
Wide Adaptability to Working Environments
- Altitude requirement: The installation height should not exceed 2000 meters.
- Temperature range: From – 5°C to + 40°C, and it can withstand humid, salt – fog, oil – fog, and mildew – fog environments.
- There is no requirement for protection against rain and snow. It is suitable for industrial workshops, power distribution rooms, etc.
Standardization and Certification
- Complies with the ISO9001 quality management system certification, ensuring the stability of the product manufacturing process.
- Suitable for terminal power distribution, motor protection, and industrial control systems.
Technical Parameters
| Parameter | Specification |
| Model | EZC100 |
| Number of Poles | 1P (single – pole), 2P (double – pole), 3P, 4P |
| Rated Working Voltage (Ue) | 550V AC (50/60Hz) |
| Rated Insulation Voltage (Ui) | 690V AC |
| Trip Type | Thermal – Magnetic Trip |
| Breaking Capacity (Icu) | (Refer to the specific model manual) |
| Installation Method | Fixed – type |
| Operation Method | Manual operation |
| Applicable Scenarios | Industrial power distribution, motor protection, terminal equipment protection |
Typical Application Scenarios
- Industrial Field: Production line power distribution, motor control cabinets, capacitor bank protection.
- Commercial Buildings: Lighting circuits, air – conditioning systems, elevator control.
- Special Environments: Chemical plants, ports, railway tunnels, and other places with corrosive gases or a humid environment.