Disconnector Switch/Isolator

How to Choose the Right Disconnector Switch

Choosing the right disconnect switch, and selecting the right disconnector switch manufacturer, depends primarily on its intended environment and the system’s voltage requirements.
As a leading disconnector switch supplier, Liyond offers specialized solutions for different settings.

Consider the specific specification and needs of your project. Consulting the product specifications will provide detailed technical information to aid your selection. For further assistance, pls feel free to contact us.

What is a Medium Voltage Disconnector?

A medium voltage disconnector, also known as an isolating/isolator switch, is a crucial component in electrical systems operating between roughly 1kV and 35kV. Liyond supplies indoor and outdoor disconnector types with rated voltages mainly of 12kV, 24kV, and 40.5kV.
The primary function of MV disconnect switch is to provide a visible and reliable means of isolating sections of the electrical circuit for maintenance, repair, or safety purposes. Unlike circuit breakers or load break switches, MV disconnectors are not designed to interrupt load current. They are intended to be operated only after the current has been safely interrupted by another device, ensuring a complete and safe separation of equipment from the live circuit.

Why are Medium Voltage Disconnector Switches Important?

Medium voltage disconnector switches are vital for ensuring the safety and operational efficiency of electrical systems. Their primary importance lies in providing a visible and reliable isolation point, crucial for safely conducting maintenance, repairs, and equipment replacements. By physically separating sections of the circuit, MV disconnectors prevent accidental energization, protecting personnel from potentially lethal electrical hazards. Furthermore, these switches offer operational flexibility, allowing for the isolation of faulty equipment while keeping the rest of the system running. This minimizes downtime and enhances overall system reliability, making them indispensable components in substations, industrial facilities, and various other medium voltage applications.

Difference Between Disconnect Switch and Circuit Breaker

Disconnect switches and circuit breakers both interrupt electrical circuits, but their primary functions differ. The key difference when considering a disconnect switch vs circuit breaker is that disconnect switches provide a visible isolation point for safe maintenance, operating only after the current is already off. They don’t interrupt load or fault current. Circuit breakers, conversely, are designed to automatically interrupt fault currents (overloads, short circuits) to protect equipment and prevent hazards. They can also be manually operated to switch circuits on and off under normal load conditions, unlike disconnector switches.