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Your Premier Isolator Switch Supplier

 

ZJBENY is a trusted manufacturer of protective components for photovoltaic systems across the globe. Through our focus on solar DC protection design, production, and marketing, we can bring brand-building PV protection solutions.
In recent years, ZJBENY has attentively invested resources in research on EV-related products, successively manufacturing other types of products, thus reaping wide market popularity across the world.abore et dolore magna aliqua. it enim ad minim veniam.

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Why Choose Us?

Rich Experience

Our experience of working in the electrical industry for more than 30 years allows us to create solar DC components that comply with the latest DC standards. With the inheritance of 30+ years of experience in the research and production of DC protection products, we are continuously dedicated to the EV charging field.

Broad Market

ZJBENY has attentively invested resources in research on EV-related products, successively manufacturing other types of products, thus reaping wide market popularity across the world.

Wide Product Range

ZJBENY offers a full range of solar PV protection products and EV chargers for different solar PV, battery energy storage, and EV charging system. Our Main Product Lines: EV Charger, Rapid Shutdown Device, Microinverter, PV Combiner Box, DC Isolator Switch, DC Circuit Breaker, DC Fuse Holder, DC Contactor, AC Components, etc.

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We independently complete the R&D, production, marketing, sales, and technical support processes. We satisfy your needs with our long warranty, technical support, and other value-added services.

 

 

What is Isolator Switch?

A disconnector is a switch used to isolate a circuit from the main power supply. It is often used in infrequently used circuits, such as lighting circuits or security systems. Isolator switches are also used for emergency stop buttons, as they can quickly and easily disconnect power to the circuit.
An isolator switch is used to disconnect the circuit from the power supply so that the circuit can be maintained without interrupting power to the rest of the system. The isolator switch is usually located at the service entrance to the building or the main switchboard.

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What are The Benefits of Using an Isolator Switch?

  • It helps protect your device from voltage fluctuations.

  • It allows you to easily isolate the device from power, which is helpful when you need a repair or replacement.

  • It can help improve the safety of devices by preventing accidental electric shocks.

  • It can extend the service life of equipment by preventing power surge damage.

  • It can help you save on energy bills by reducing the amount of power your device consumes.

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Features of Isolator Switch

ZJBENY Firefighter Safety Switch BFS-S

Safety Isolation

To prevent electrical shock and equipment malfunctions. While it doesn't function exactly like a circuit breaker that separates the circuit automatically in case of an overload, an electrical isolator switches, it's done manually.
Module Level Rapid Shutdown Device CE Version BFS-12

Clean Switching

No power-on or power-off transients (surges). When the switch is activated, it will either turn on or off, but there won't be any surges while it does so.
Solar Panel Rapid Shutdown Junction Box BFS-31

Fail Safe Configuration

A device that requires two or more switches to work in conjunction with each other can create a situation where the failure of either switch will cause the entire system to fail.
The isolator switch has this danger covered because if one fails, you still have another switch that can operate independently and ensure safety.
LifePO4 Energy Storage Battery Pack Wall-mounted

Size and Portability

You have the power to create your own configurations. Customise your system so it can suit your specific requirements.
LifePO4 Energy Storage Battery Pack Stacked

Design Modularity and Scalable Design

Easily add more switches onto the same control pad.
LifePO4 Energy Storage Battery Pack Stacked

Intuitive Operation

Easy to use and program. The green status LED will indicate if a switch is on or off, and blue LEDs will show what each switch does (e.g.: which lights are on in a room).
Also, because the isolator switches are operated manually having no complicated programming, all you need to do is turn the knob clockwise or counter-clockwise to operate your switches
LifePO4 Energy Storage Battery Pack Rack-mounted

Low Power Consumption

Energy consumption is less than 0.1 watts when "off" and less than 0.5 watts when "on".
LifePO4 Energy Storage Battery Pack Rack-mounted

Multiple Operating Modes

Independent, Sequential, Momentary, and Toggle. The first three can be used to configure a system.
Types of Isolator Switch

AC isolator Switch

This type of isolator switch is used to break the current in AC circuits. You'll often find it in homes and buildings that are connected to the power grid. An AC isolator switch should not be used in DC circuits since its design is only meant for AC.
The AC isolator switch is also usually located between the meter and the consumer unit. Here, it provides a safe and convenient way to disconnect from the grid from the various circuits as needed.

DC Isolator Switch

This is a DC load isolator switch. What this means is that it works in direct current (DC) circuits, but serves the same purpose as the AC isolator switch.
DC isolator switches are commonly found in solar power systems where they disconnect the solar array from the rest of the system. In this application, the DC isolator is mounted between near the solar panels or close to the solar inverter, but on the DC side.

 

 

Applications of Isolator Switch
1. Extractor fans

Extractor fans are regularly found in bathrooms or kitchens and work to remove stale and humid air which is then replaced with fresh air. Also, due to building regulations more and more homeowners need extractor fans.
However, due to the sophistication of these machines and the power they possess, they need isolation switches for repairs or maintenance.
For this reason, fans generally make use of 3-pole isolation switches because there are three lines that usually need disconnection to completely isolate the fan.
if an isolator switch isn't installed, maintenance requires shutting down a large swath of circuits which could affect other appliances.

2. Showers

Electrical showers are common in most homes and outfitting with an isolator switch is often required; as showers tend to be fitted in special locations.
For clarification, a special location is an area where installation carries a greater risk of electric shock and since bathrooms tend to be more humid and wet, they fall under this category.
Therefore, for safety, electrical showers must have an isolation switch installed. Failure to do so is a code 2 defect and means you run the risk of breaching the rules enshrined in BS7671.

3. Refrigerators

Refrigerators, especially large ones, need an isolation switch to ease the challenges associated with maintenance and repairs. Just like with showers, refrigerators are in close proximity to water and could be dangerous if not handled properly.
Also, most freezers or refrigerators have sockets that are hard to reach which means you'll have to touch or move the appliance; which could be dangerous if it develops a fault.
This is why an isolator switch is required and the absence of one is a possible breach of BS7671 which recommends that all kitchen appliances be outfitted with isolators.

4. Air conditioners

While it's okay to hardwire your air conditioner to the switchboard, it has a few drawbacks and could even be hazardous in some cases.
It is advisable to equip your outdoor unit with an isolator switch as it protects the appliance from strikes in a storm and also prevents your home safety switch from tripping in the event of a fault.

 

How to Wire an Isolator Switch

  • Ensure that the wiring you plan to use for the installation is fully compatible with the switch and rated for the expected current

  • Make sure that the current to the relevant wires has been cut off

  • Remove the previous socket (if applicable) along with any debris or dust in the wall box

  • Attach the load and supply cables, wiring the internal conductors and earthing wire to the corresponding terminals according to the isolator schematic. The layout of the terminals will vary from model to model. Peel back a length of the insulation from each conductor so the screws make direct contact with the copper wiring - this is very important. Cut off any protruding strands. The earthing wire in each cable should be connected to the corresponding terminal on the switch and from there to the earthing terminal in the wall box

  • Some isolator switches are supplied with a plastic gasket (mechanical seal). These should be placed between the wall at the back of the box and the device

LifePO4 Energy Storage Battery Pack Rack-mounted

 

Certifications

We have the UL1741 mark, certification issued by Underwriters Laboratories, the most important for system interconnection tests in the USA. ZJBENY also holds SAA, CB, CE, TUV, ISO, RoHS certifications. 

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Contact US

                        If you have any enquiry about quotation or cooperation, please feel free to email us at benyi@zjbeny.com, or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.

                        TEL: +86-577-57177008
                        FAX: +86-577-57177007
                       Address: Changjiang Rd, Wenzhou Daqiao Industry Park, Yueqing, Wenzhou, Zhejiang, China, 325603

 

Frequently Asked Questions

Q: What is an isolator switch used for?

A: An isolator switch is used to disconnect the circuit from the power supply so that the circuit can be maintained without interrupting power to the rest of the system. The isolator switch is usually located at the service entrance to the building or the main switchboard.

Q: What is a isolator used for?

A: Isolator is a manually operated mechanical switch that isolates the faulty section of substation. It is used to separate faulty section for repair from a healthy section in order to avoid the occurrance of severe faults. It is also called disconnector or disconnecting switch.

Q: What is the purpose of the isolator or neutral switch?

A: Switch disconnectors, also known as isolators, are essential for electrical isolation requirements such as repair, maintenance/service, installation and inspection to ensure that an electrical circuit is completely isolated.

Q: What is the difference between a breaker and an isolator?

A: An isolator is an off-load device; it can only be operated when the current flowing is zero i.e., when the power supply is off. While a circuit breaker is an on-load device; it can operate perfectly when the power supply is on.

Q: What are the disadvantages of an isolator?

A: The disadvantage to an isolator is added cost and complexity, and if a diode-type isolator is used (which is very common) there is additional voltage drop in the circuit between the charging source and the batteries.

Q: What is the difference between a switch and an isolator?

A: Isolators or disconnectors work by physically separating sections of a circuit - this is called an air break. Fused switch disconnectors provide an additional level of safety and certainty because these will blow, breaking the circuit, in the event of rogue current.

Q: Should my isolator switch be on or off?

A: They switch the live and the neutral making it is safe to carry out maintenance. They should all be left in the on position unless they're being worked on. Houses with lots of extractors tend to have them because the airflow is so poor.

Q: Is isolator a main switch?

A: An isolation switch is fundamental when working with electrical circuits, as they are used to ensure the circuit is safe and de-energized which allows maintenance work to take place. Also referred to as main switches, these devices separate the circuit from the main power source and dispels any trapped charges.

Q: What is the current rating of an AC isolator?

A: Isolator switches are designed with maximum current ratings - i.e. the highest level of current at which they will operate safely. This can range from as little as six amps up to 200 amps, via mid-range models between 20A and 50A.

Q: Is there a difference between AC and DC isolators?

A: The main difference between AC and DC isolators in the voltage they are meant to handle. While an AC isolator switch is used with AC voltages, a DC isolator switch is designed to only work with direct current sources. That means the two types of isolator switches will have different ratings and capabilities.

Q: What is the purpose of an AC isolator?

A: Aircon isolators have been designed to prevent the repeated tripping of home safety switches when faulty air conditioning systems. The isolator disconnects the power supply as soon as it detects any malfunction or unusual electrical fault.

Q: Who can install an isolator switch?

A: An isolation switch can either be installed by your supplier or an approved 3rd party installer.

Q: How do I choose an isolator rating?

A: Voltage and Current Levels: One of the most important factors to consider is the voltage and current levels of your electrical load. These values will determine the capacity required for the isolator disconnectors to safely handle the flow of electricity.

Q: What is the purpose of a DC isolator switch?

A: 1. The DC isolator switch is used to safely isolate a system from its power source. It does not protect against overloads or short circuits like a DC breaker does, and must be fused for this purpose.
2. On the other hand, a DC circuit breaker is usually used to provide overcurrent protection in an electrical system. It will trip the circuit in case of an overload or short circuit, thus preventing damage to components and wiring.
3. The DC isolator also needs to be manually operated, often using a handle or other switch, and usually after the circuit breaker has been used to witch off or disconnect the circuit. Likewise, during re-connection, the isolator must be the first device to close.
4. A DC circuit breaker, in contrast, is automated and can switch the system off without any manual involvement from the user; that way, the circuit breaker acts as both an overcurrent protector and a disconnection switch for DC systems.
5. Another difference between a DC isolator vs. DC breaker is that a circuit breaker comes equipped with arc-suppression and shock-protection features. These are not present in an isolator switch, making it important to install fault current safety devices when using the latter.

Q: Is there a fuse in an isolator switch?

A: A switch fuse or switch fuse isolator, they cut off the electricity supply to a given part of the circuit to isolate it, with multiple fuses within the same enclosure to make the job of selecting the correct one as simple as possible.

Q: When would you use an isolator switch?

A: An isolator switch is used to disconnect the circuit from the power supply so that the circuit can be maintained without interrupting power to the rest of the system. The isolator switch is usually located at the service entrance to the building or the main switchboard.

Q: Do you need a DC isolator switch?

A: This can be when you need to perform maintenance on the system or in an emergency and the power safely and quickly switched off. For that reason, it's a requirement by law to install a solar panel DC isolator switch in all PV systems, (particularly near the inverter), in many parts of the world.

Q: How do you install an isolator switch?

A: Using a wire stripper, carefully remove the insulation from the ends of the cables coming from the power source. Connect the positive cable to the positive terminal of the isolator switch and the negative cable to the negative terminal. Ensure that the connections are secure and tightly fastened.

Q: What is the difference between DC breaker and isolator switch?

A: The main difference between an isolator switch vs. circuit breaker is their purpose: isolator switches are used to manually disconnect or isolate a circuit, while circuit breakers act as overcurrent protection devices.

Q: What is the difference between a normal switch and an isolator switch?

A: In essence, a normal switch disconnects an appliance or circuit in the on-load condition while an isolator switch disconnects a circuit in the off-load condition. This makes isolators much safer than normal switches, as there is no danger of electric shock.

Our company is one of the leading isolator switch manufacturers and suppliers in China, providing the best customized service. Welcome to wholesale high quality isolator switch for sale here and get quotation from our factory.

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