Power disconnect switch LN3, 3-pole 400A LN3-400-I 112008

Power Disconnector – Reliable Power Disconnection

This three-pole LN3 power disconnector with a current of 400A is a robust solution for safely disconnecting electrical circuits. It is suitable for both industrial installations and public buildings where high reliability and durability are required. The device's design allows for mounting in distribution boards and intermediate mounting, providing great flexibility during installation.

Functionality and Application

The LN3-400-I disconnector is designed for operation in circuits with a rated voltage of 690…690 V and a maximum AC voltage of 400 V. Its construction allows it to be used as an emergency switch and a maintenance disconnector, ensuring safety during maintenance and repairs. The high rated continuous current (400 A) and withstand short-circuit current (12 kA) guarantee stable operation even in difficult conditions. The possibility of using an optional overvoltage release further increases the functionality of the device.

• Versatility: Can function as an emergency switch or a maintenance disconnector.
• Mounting Flexibility: Possible mounting in distribution boards, intermediate, and on a plate.
• Durability: Rated withstand short-circuit current of 12 kA provides protection against the effects of short circuits.
• Safety: Features a locking mechanism to prevent accidental switching on after switching off.
• Durability: No derating of rated values up to +50°C ensures stable operation in various ambient conditions.
• Compatibility: Common accessories with LZM/LN and NZM/N series simplify the selection and replacement of elements.

Construction and Parameters

The LN3-400-I disconnector is characterized by a solid fixed construction. Made of high-quality materials, it ensures long-lasting and trouble-free operation. The connection of the main contacts is made using screw connections, which guarantees a secure and safe connection of the wires. The device has a degree of protection of IP20 on the front side, protecting against accidental contact. The lever actuator allows for convenient and intuitive control of the disconnector. The rated operating power for AC-23 at 400 V is 200 kW, confirming its efficiency in industrial applications. Additionally, the device meets the requirements of EN 60947-2 standard, guaranteeing its compliance with European safety standards.