Schneider EZ7SW-3P100A is an isolating switch with 3 poles and a rated current of 100A. It belongs to Schneider’s Easy 7 series of low-voltage terminal power distribution products and is mainly used in industrial and commercial power distribution systems.
Core Functions:
Circuit Isolation: Provides obvious electrical isolation during maintenance or overhaul to ensure personnel safety.
On/off Operation with Load: Can connect and disconnect load circuits below the rated current (it does not have overload and short-circuit protection functions).
Power Switching: Used for connection control between the power supply side and the load side.
Detailed Technical Parameters
| Parameter | Value | Description |
| Rated Current | 100A | Maximum current that can be stably carried for a long time |
| Number of Poles | 3P (Three-phase) | Controls three-phase circuits simultaneously |
| Rated Voltage | 230/400V AC | Suitable for standard three-phase 380V systems |
| Rated Insulation Voltage | 500V AC | Maximum insulation withstand voltage |
| Rated Operating Frequency | 50/60Hz | Applicable standard power frequency |
| Pollution Degree | Degree 2 | Suitable for general industrial environments |
| Mechanical Life | 1,700 times | Maximum number of mechanical operation cycles of the switch |
| Electrical Life | 15,000 times | Maximum number of load-carrying operation cycles |
| Protection Degree (IP Rating) | IP20 | Prevents intrusion of solid foreign objects larger than 12mm |
| Wiring Capacity | Max. 150mm虏 | Cross-sectional area of connectable wires |
| Weight | Approx. 205g (3P) | Net weight of the product |
Application Scenarios
- Industrial Power Distribution Systems
– Main power switch for equipment, facilitating safe isolation during maintenance and overhaul.
– Isolation protection for motor control circuits.
- Commercial Building Power Distribution
– Main switch for floor distribution boxes.
– Group control for lighting systems.
- Residential Power Distribution
– Main incoming switch for villas or multi-storey residences.
– Dedicated isolation for large electrical appliances (such as air conditioners and water heaters).
- Temporary Power Supply Scenarios
– Power control for construction site distribution boxes and mobile equipment.
Differences from Circuit Breakers
Key Differences Between EZ7SW (Isolating Switch) and EZ7 Circuit Breaker:
| Feature | EZ7SW Isolating Switch | EZ7 Circuit Breaker (e.g., EZ7-100A) |
| Protection Function | No overload/short-circuit protection | With dual protection against overload and short-circuit |
| Arc Extinguishing Capacity | Limited, suitable for normal load operation | Strong, capable of breaking short-circuit current (6kA) |
| Application Position | Power supply side, used for isolation | Load side, used for protection and control |
| Operation Frequency | Low (1,700 mechanical life cycles) | High (10,000 mechanical life cycles) |
Selection Suggestion: They are usually used in conjunction. The circuit breaker is responsible for protection, and the isolating switch is responsible for isolation to ensure maintenance safety.
Installation and Usage Guidelines
- Installation Requirements:
– Install vertically (inclination ≤ 5°), with the operating handle in the upward position for closing.
– Install using standard DIN rails for easy replacement and expansion.
– Ensure the installation location has good ventilation, with an ambient temperature of -5℃ ~ +55℃.
- Wiring Specifications:
– Connect the power supply to the static contacts (upper end) and the load to the moving contacts (lower end).
– Tighten with a torque of 3.5Nm (using M7 screws) to ensure good contact.
– The cross-sectional area of the wire should be ≤ 150mm² to ensure a secure connection.
- Usage Precautions:
Breaking with fault is strictly prohibited: Operate only when the load is working normally.
– Before maintenance, the circuit breaker must be disconnected first, then the isolating switch.
– Ensure hands are dry during operation to avoid electric shock risks.
Summary
Schneider EZ7SW-3P100A is a reliable industrial-grade isolating switch, specifically designed for 380V three-phase power distribution systems, providing safe isolation and load-carrying operation functions. Although it does not have protection functions, it serves as the “last line of defense” for electrical safety and is crucial in maintenance and overhaul processes.
Purchase Tip: If complete protection functions are required, it is recommended to use it with Schneider’s EZ7 series circuit breakers (e.g., EZ7-100A) to build a complete power distribution solution of “isolation + protection”
