Isolator and switch disconnectors, also called fused switches, are simple mechanical devices ideal for ensuring a complete de-energising of a circuit for service or maintenance. These isolators, or fused switches, are comprised of various fuses within integrated similar enclosures for easy selection and isolation of a specific circuit’s parts. For instance, they are ideal for physically disconnecting a circuit when needed repairs.
They are also known as:
Switch disconnectors have several alternative names, given below.
- Isolation switches
- Fused isolators
- Fused isolator switches
- Isolator switches
- Power isolation switches
- Switch fuse disconnector
- Fused or fuse switch disconnector
- Disconnecting, disconnector, or disconnecting switches
Applications of fused switches:
As all electrical equipment must be maintained and serviced regularly, these protective switches have become the equipment that must be installed everywhere, from homes to garages. They have a variety of applications:
- They prevent damage to electrical equipment from short circuits and overcurrent and enable timely monitoring.
- They provide more excellent safety than non-fused devices due to the fuse breaking in an event such as a short circuit or overcurrent.
- They are attached to car batteries for the protection of mechanics conducting repairs.
- They also protect engineers and electricians from electrocution.
Types of isolators and switch disconnectors:
Isolator switches come in various models, each designed for different uses. For example, some are designed for alternating current (AC), while others are for direct current (DC). They are intended specifically for various applications with different numbers of poles or fuses. In short, fused switches come in a wide range of types depending on the fuses, the number of poles, and the terminal types they have.
Is there any difference b/w the isolator switches and circuit breakers?
Isolator switches are different from circuit breakers, despite their similar function. An isolator provides isolation functions and acts as a switch. In contrast, a circuit breaker functions as a protective device like an ACB, MCB, etc., breaking the circuit during an overload and a short circuit fault.
