Type B RCD Residual Current Device
RCD – Residual current device is the device that monitors the electrical installations or electric circuits to inspect the presence of unbalanced earth fault currents. The residual current monitors do not incorporate the tripping devices and over current protection.
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.
What Type B Residual Current Devices Do?
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.
Benefits of Type B Residual Current Devices
There are a lot of advantages of using Type B residual current devices.
One of the major benefits mentioned above is that it has fewer chances of tripping by providing better reliable customer solutions.
Other than that, Type B residual current devices will ensure the services’ continuity.
Another benefit is that Type B residual current devices will detect the earth leakages at greater frequencies and protect the circuits and appliances from risks and electric shocks.
Last but not least, Type B RCCB protects persons and machines when a DC with a high-frequency AC fault current exists.
Difference between Type A, Type B, and Type C RCD
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.
Applications for Type B Residual Current Devices
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.
IVY offers MD0630T01A for monitoring and/or providing shock protection and fault protection on AC and DC installations and for EV charging applications. MD0630T01A is a RCD sensor specifically developed for EV-charging providing all-current sensitivity. The sensor can issues an alarm signal in case of hazardous electrical faults (DC and AC). It has the characteristics of accurate measurement, small size and integration. The RCD sensor can be set separately for AC and DC leakage and has a digital output function.
MD0630T01A is an automotive grade leakage current sensor also called residual current monitoring (RCM), residual current detection (RCD), differential current sensor, leakage current detector and fault current sensor. Type A, B and B+, dedicated to detect to DC, AC and DC+AC leakage current measurement. The MD0630T01A can monitor DC (6mA) and AC (30mA) residual currents, it is connected in series with the AC supply to an EV and will provide a signal output if a DC current ≥ 6mA DC flows in the circuit. In addition, our delivery time is also guaranteed.
