IC697CHS790 | GE FANUC | Detecting pulsating DC leakage

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IC697CHS790 | GE FANUC | Detecting pulsating DC leakage

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It can be seen that after DC leakage occurs in the backend, it will also affect the front-end circuit. The pulsating DC waveform after rectification will be distorted, and IC697CHS790 will produce spikes, which will gradually interfere with the back-end circuit, affect the charging effect, and even affect the battery life. On the other hand, due to the presence of the TN system, this type of fault will not generate a large voltage on the body of the vehicle and is less harmful to human health. However, if the grounding wire of the connection system is missing or the PE wire is disconnected, this part of the voltage will harm the human body. In fact, there are problems with the connection of PE wires and ground wires in many parts of China, especially in rural areas. The existing A-type RCD can only detect pulsating DC leakage without interference from DC 6mA current, and cannot detect DC leakage and disconnect protection. When the DC leakage is greater than 6mA, the residual DC current will cause the magnetic core to magnetize in advance, increasing the trip value, causing A-type RCD to be unable to operate normally. Therefore, B-type RCD must be used for protection!

Similarly, inside the DC charging station, the mains electricity is converted into high-precision DC electricity through a non vehicle mounted charger to charge the battery. The leakage protection of IC697CHS790 DC charging station is divided into AC side and DC side. In theory, B-type RCD should also be added to the AC side for protection, and a DC to ground insulation monitoring device should be installed on the DC side to detect the insulation detection of the DC positive and negative poles to the ground.

In the foreseeable future, as new energy vehicles enter millions of households, the IC697CHS790 charging station will become an essential part of people’s lives. Therefore, it is necessary to update and replace the residual current protectors inside the charging station. Only a safe electricity environment can allow everyone to enjoy the convenience brought by new energy vehicles with peace of mind.

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