Isolating switch with visible contact break, front rotary drive, DPX-IS 250 4P 250A 026607

Isolator switch – safety and reliability in your installation

This isolator switch with a visible contact gap, with a rated current of 250A, is a key element ensuring safe and effective disconnection of electrical circuits. Designed by Legrand, it combines a solid construction, ease of use and compliance with the latest safety standards. The device is intended for both professional applications and end-users requiring a reliable solution in terms of circuit isolation.

Construction and application

The DPX-IS 250 isolator switch is designed for panel mounting, which ensures stability and durability of the connection. It has 4 poles (4P), making it ideal for disconnecting three-phase circuits. The front-mounted rotary drive mechanism allows for intuitive operation and quick visual verification of the disconnection status. Thanks to the possibility of cooperating with optional voltage release devices, the isolator switch can be integrated with advanced installation protection systems. It will work as a main switch, safety switch and repair switch – offering versatile use in various types of electrical installations.

Key features and benefits

• Visible contact gap: Provides clear visual information about the disconnection status of the circuit, increasing safety during maintenance and service work.
• High rated continuous current value (250A): Allows for safe disconnection of circuits with high load, which is particularly important in industrial and commercial installations.
• Rated operating voltage up to 690V: Enables the use of the isolator switch in a wide range of electrical installations with different rated voltages.
• Solid construction and locking mechanism: Guarantee reliable operation and long device life, minimizing the risk of failure.
• Possibility of mounting additional accessories: Expands the functionality of the isolator switch, allowing it to be adapted to the specific requirements of the installation (e.g. overcurrent/undervoltage release devices).
• Compliance with IEC/EN 60947-3 standards: Confirms compliance with stringent safety and quality standards.
• Easy mounting on TH35 rail: Enables quick and easy installation in distribution cabinets.
• Screw connection: Ensures a secure and durable connection of electrical wires.

Technical parameters in practice

The rated short-circuit current of 40 kA demonstrates the isolator switch's ability to withstand sudden overvoltages without damage, which increases the safety of the entire installation. The degree of protection IP20 provides protection against finger contact and against access of solid objects larger than 12.5 mm – a standard required for devices mounted inside electrical cabinets. The possibility of using undervoltage release devices allows for additional protection against voltage drops that may damage connected devices.