Do you have any idea about residual current devices? Do you know what residual current device is used for the universal power supply? Do you have any idea about what happens inside your safety switches? Are you looking for a residual current device best for your electric vehicle charging system? If you have no idea about the answers to these questions, no worries at all. This blog post will tell you all about Type B residual current devices used for both purposes (charging of your electric vehicles and universal power supply. We will also share necessary information about different types of residual current devices. Keep reading for more information.
Residual current devices protect your safety switches. They provide protection in three ways, i.e., fire protection, fault protection, and additional protection.
Residual current devices are designed with coils of wires around a cord. A Residual Current Device monitors the earth leakage and acts as a safety guard.
A residual current device is based on two different technologies. One is electromagnetic, and the other is electronic. Both technologies offer great performance. Electromagnetic devices are strong enough to detect very small residual currents and require no earth lead. There has no impact on them due to the temporary loss of the electric power supply. On the other hand, electronic devices are comparatively less strong, so they require earth lead to perform well during the loss of the electric power supply.
Types of Residual Current Devices
There are different kinds of residual current devices that work for the protection of switches, devices, and people in the surroundings.
Let’s discuss these types of residual current devices.
There are other types, usually called wave form types of residual current devices. These forms are:
Type A residual current devices are best for AC and DC power. Appliances that work better with type A residual current devices are inverters, induction hobs, charging equipment for electric vehicles, power supplies, IT equipment, and lighting equipment such as dimmers and LED drivers. These devices are also good for appliances with type AC.
Type AC residual current devices protect the resistive and inductive electrical equipment. Appliances for type AC residual current devices are hob, oven, heater, electric showers, and tungsten lighting.
Type F residual current devices are designed to protect residual fault currents more. They safe compensations produced due to compound incidences. Type F residual current devices are typically used for appliances that control frequency. Type F residual current devices can be used for appliances such as air conditioners, power tools, dishwashers, tumble driers, and washing machines. These devices are also suitable for Type AC and Type A appliances.
If you are an electrician working with the electrical wires to set up the EV charger at home, you might have heard about the Type B RCD. This is similar to the Type B RCCB.
Let’s discuss the Type B residual current devices in detail.
Type B residual current devices are designed to combine two different residual current devices. The first system uses technology to detect smooth current. The second system uses a technology that depends on the voltage. This is designed by keeping in mind that it should work even if there is no line voltage.
Type B residual current device disconnects the power if the earth leakage current is detected as dangerous. If the earth leakage current is equal to or less than ten mA, then the Type B residual current devices would not trip because this current amount is not dangerous. The electric car will continue to get charging without any interruption. The Type B residual current devices will immediately trip the circuit and disconnect the power supply for higher currents. Like this, Type B residual current devices will protect the circuits from danger.
You can always not minimize the risks of shocks produced by contact with conductors. The ratio of accidents increases with every passing day due to electric shocks. New residual current devices are designed to protect and save surrounding people and property from danger to minimize these risks.
Type B residual current devices are a bit expensive compared to the other ones. These are expensive, but they provide a reliable solution for the users and homeowners with less tripping. With Type B residual current devices, homeowners and users are fully satisfied as they have fewer tripping chances, so their cars will be charged fully when they wake up in the morning.
There are a lot of advantages of using Type B residual current devices.
Type A enables the tripping for residual AC and pulsating DC currents, while type B also ensures the tripping for smooth DC currents other than residual AC and pulsating DC currents.
Type B residual current devices are best for three phase appliances like EV charges. These three phase drivers can cause earth leakages at different frequencies. EV manufacturers used to say that there is a built-in detection device within the EV chargers that detect the leakage and provide protection. But Type B residual current devices will ensure the continuity of the supply to charge the electric vehicle smoothly.
Type B residual current devices are also recommended for PV systems. It helps to protect the electrocution by using DC or AC converters. Type B residual current devices can also be used for electro-medical instruments, ventilation systems, inverters, universal power supplies UPS, EV vehicle charging stations, lifts, escalators, welding equipment, welding machines, industrial machines, elevators, photo voltaic systems, and crane powered from a mobile panel board. Type B residual current devices are also suitable for Type AC, Type F, and Type A applications.
Type EV residual current devices are specifically for EV charging systems and stations. These devices can detect AC and DC residual currents. This is a lower-cost option for the Type B residual current devices. Type EV residual current devices have different features.
You may be wondering how an EV charger works. It is so simple. An EV charger pulls an electrical current from an outlet or a grid. It then transfers the electricity to the vehicle through the attached wire. The method is similar to EV charging, just like you charge other appliances at your home by plugging the charger into the wall.
The converters are built in the car, which is called the onboard charger. The converter in the electric vehicle converts the power from AC to DC. Later, it feeds and supplies the power and electricity to the electric vehicle’s battery. This is the most common method to charge your electric vehicles.
Charging an electric vehicle depends on the car’s battery’s size and the dispenser’s output. Other factors also affect the charging time and speed. Most electric vehicles can get 80% charging within an hour using available fast DC chargers. These chargers are essential for those who want to cover high mileage, long distances, and large fleets. Remember that DC chargers are much faster than AC chargers, which is why a DC charger is expensive to install compared to an AC charger. If you look for the long term benefits of these chargers, you will never think about the expensive installation of these fast DC chargers for your electric vehicles.
When you are buying a type B residual current device, you must ensure the reliability of the devices. The safety and life of your switches depend on the residual current devices. Prefer to buy a device that is good in ratings and reviews. There are a lot of brands available in the market. Look for someone who is trustworthy, reliable, and has a good reputation. Electricity is a basic need these days, so never compromise on the related matters and issues.
So, this is all about Type B residual current devices or Type B RCCB. Remember that Type B RCCB provides the maximum level of protection among several types of residual current devices. For more information about Type B RCCB, you may read a IEC standard related to IEC / EN 62423 Type B Residual Current Circuit Breakers.
If you like this blog, you can mention it in the comments below. If you have any queries regarding residual current devices, types, and implications, feel free to ask anytime.
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