Disconnecting switches

Isolation switches and fuse switch disconnectors

An isolation switch is a device with two major functions, to cut off the power supply and to isolate an electrical installation from its supply network. They are used to prevent accidents and to carry out maintenance and repair work on electrical distribution circuits up to 6300 A. A multitude of isolation switch models are available for diverse applications: residential (DIN rail mounting), commercial and industrial (Schneider NSX and MasterPact ranges). There are different types of isolation switches, each with its characteristics and performance. It's important to choose a switch that's right for the electrical installation you want to protect. Ensure you install your isolation switch in an easily accessible location close to the circuit it supplies. This will facilitate the safe and efficient control of the power supply in the event of an emergency disconnection. Be sure to comply with all applicable safety standards and regulations when installing isolation switches to ensure safe and reliable circuit operation.

What is the purpose of an isolation switch?

Circuit breakers protect individual circuits against overloads and short circuits, while an isolation switch cuts off the power supply to an electrical installation. Installing an isolation switch offers several benefits, particularly in terms of safety, maintenance and control of the power supply:

• Protection against electrical accidents
• Improved electrical safety in your home
• Reduced risk of fire
• Prolonged service life for your electrical installation
• Ability to cut off the power supply to your circuit if necessary

The presence of an isolation switch is indispensable in all electrical installations to avoid electrical hazards.

How to choose your isolation switch?

Here are a few tips to help you identify the right isolation switch for your installation:

• Current rating: This is the maximum power the switch can withstand. It must be higher than the maximum current of the electrical circuit.
• Voltage rating: This is the maximum voltage the isolation switch can accept. Different isolation switches are available for different voltages. Make sure the model you choose is suitable for the voltage rating of your electrical circuit.
• The number of poles should be considered regarding the number of phases in the electrical circuit - single-pole switch, double-pole (DP) and triple-pole (3P).
• Current capacity: Calculate the current capacity of the isolation switch that it will safely withstand. Make sure it has the necessary breaking capacity to break the current if necessary.
• Finally, consider the environment and room temperature where the isolation switch will be installed. Some areas require specific switches, such as those resistant to humidity, dust or chemicals.

To ensure you make the best choice, don't hesitate to ask a qualified professional for advice. Our technical support team will be happy to answer any questions you may have, either by phone or e-mail.