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Isolator switches, also known as disconnect switches or [circuit breakers](https://sg.rs-online.com/web/c/fuses-circuit-breakers/circuit-breakers/), are electrical devices used to disconnect electrical circuits from a power main or source. Isolator switches provide a means of isolating circuits or equipment for maintenance, repair, or safety purposes, ensuring the safety of both personnel and equipment in industrial, commercial, and residential settings.

## **How do Isolator Switches Work?**

[Isolators and switch disconnectors](https://sg.rs-online.com/web/content/discovery/ideas-and-advice/isolators-switch-disconnectors-guide) are designed to interrupt the flow of electrical current and provide a physical barrier to prevent accidental contact with live electrical parts. They operate by creating a visible break in the electrical circuit. When activated, the switch physically separates the contacts, preventing any current flow. This isolation ensures that no electricity can pass through the circuit, even if someone accidentally activates the power source – making it crucial to [industrial electrical safety](https://sg.rs-online.com/web/content/discovery/ideas-and-advice/industrial-electrical-safety-guide).

## **What are the Benefits of Isolator Switches?**
- **Safety:** The primary advantage of isolator switches is enhancing safety. They provide a clear and reliable means of disconnecting power to equipment or circuits, reducing the risk of electric shock or accidents during maintenance or repairs.
- **Maintenance:** Isolator switches allow equipment or circuits to be safely de-energised for maintenance or servicing. This ensures that technicians can work on the equipment without the risk of electric shock or damage.
- **Emergency Response:** In the event of an emergency, isolator switches can quickly and easily disconnect power, preventing further damage or hazards
- **Energy Management:** Isolator switches can be used to control the energy supply to specific areas or equipment.
- **Fault Identification:** Isolator switches often include indicators or visible disconnects, allowing for easy identification of whether a circuit or equipment is energised or de-energised.
- **Compliance:** Isolator switches are frequently required by electrical safety codes and regulations to ensure proper safety measures are in place.

## **Types and Phases of Isolator Switches**

Isolator switches come in various types and configurations, designed for different applications, power systems, and electrical system requirements:

- **Single-Phase **Isolator Switches**: **These switches are designed for single-phase electrical systems, where power is supplied by a single line and a neutral conductor. They are commonly used in residential and small commercial applications where the electrical load is relatively low.
- **Three-Phase **Isolator Switches**: **These switches are designed for three-phase electrical systems, where power is supplied by three separate lines and a neutral conductor. Three-phase systems are commonly used in industrial, commercial, and larger residential applications due to their higher power requirements.
- **AC Isolator Switch:** These switches are specifically designed for alternating current (AC) circuits, the most common type of power supply in Singapore.
- **DC Isolator Switch:** DC isolator switches are used in direct current (DC) circuits, commonly found in specific industrial applications and renewable energy systems.
- **Fused Isolator Switch:** This type incorporates a fuse for additional protection against overcurrents.
- **Non-Fused Isolator Switch:** These switches do not include a fuse but still provide isolation functionality.
- **1-Pole Isolator Switch:** Controls a single circuit with one live wire.
- **2-Pole Isolator Switch:** Controls two circuits or a double pole circuit.
- **3-Pole Isolator Switch:** Suitable for three-phase electrical systems.
- **4-Pole Isolator Switch:** Used for three-phase systems with an additional neutral pole.

## **Applications of Isolator Switches**

Isolator switches are used across various industries in Singapore:

- **Electrical Distribution Systems:** They isolate sections of distribution systems for maintenance or repairs.
- **Industrial Machinery and Equipment:** Ensure safe isolation for maintenance on factory machines.
- **Renewable Energy Systems:** Isolate solar panels or wind turbines for maintenance and safety.
- **HVAC Systems:** Control and isolate power to heating, ventilation, and air conditioning systems.
- **Manufacturing and Process Industries:** Isolate specific equipment or processes for maintenance and troubleshooting.
- **Data Centers:** Protect servers and network equipment from electrical faults.

## **How Order and Delivery Works at RS Singapore**

As a trusted supplier and distributor of relay & signal conditioning equipment in Singapore, such as isolator switches and [signal conditioners](https://sg.rs-online.com/web/c/relays-signal-conditioning/signal-conditioners-isolators/signal-conditioners/), RS carries trusted and renowned isolator switch brands such as ABB, Kraus & Naimer, Schneider Electric, and Craig & Derricott amongst others – ensuring that you’ll be able to find the proper equipment for your industrial needs.

To order your desired isolator switches and other products from RS, simply follow these steps:

1. Explore our extensive online catalogue.
2. Choose the desired product and add it to your cart.
3. Check out and enjoy secure payment options and fast delivery within Singapore.

Refer to our [Delivery Information page](https://sg.rs-online.com/web/content/support/all-articles/delivery) for more details on delivery options, charges, exclusions, and consolidated delivery.



Ensure electrical safety with RS Singapore's range of isolator switches. Find AC & DC isolator switches for industrial, commercial & residential applications.

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