Dc charging pile power switch chip overvoltage protection module OVP...
Introduction to Residual Current Device of DC charging pile
Leakage protection of DC charging pile is one of the key technologies to ensure charging safety, which involves many aspects to prevent users from electric shock and protect the normal operation of equipment. The following is a detailed introduction to the concept, role and working principle of leakage protection of DC charging pile:
Main component
Concept:
Leakage protection refers to the safety measures in the electrical system to prevent electric shock and equipment damage by detecting leakage current and cutting off the power supply in time. In the DC charging pile, leakage protection is particularly important, because the charging process of electric vehicles involves high voltage and high current, and any leakage may lead to serious safety accidents.
Function:
1. Anti-electric shock protection: prevent the user from electric shock during the charging process to ensure personal safety.
2. Leakage current protection: Prevent the leakage current that may occur in the device itself and the output current to avoid the risk of equipment damage and fire.
3. Insulation resistance protection: Through the appropriate insulation resistance to prevent the current through the insulation layer to produce danger.
4. Overvoltage and overcurrent protection: prevent high voltage and high current from causing harm to human body and equipment.
5. Isolation transformer protection: Use isolation transformers to reduce the risk of electric shock.
6. Electromagnetic compatibility: Avoid electromagnetic interference on the human body and equipment.
7. Anti-lightning protection: Prevent the equipment and human body from being harmed by lightning.
8. Emergency shutdown protection: Quickly cut off the power in an emergency to avoid the expansion of the accident.
Working Principle:
The leakage protection of DC charging piles usually uses the Residual Current Device (RCD), also known as the leakage circuit breaker. RCD can quickly power off when leakage current is detected, protecting the safety of users. The working principle of RCD is based on detecting whether the current flowing through the phase line and neutral line is balanced, and if it is not balanced, that is, there is a leakage current, RCD will trigger and cut off the power supply.
In DC charging pile, according to the leakage protection requirements of IEC 62752, Type A module + DC 6mA module or direct Type B leakage current sensor can be used for protection. The Type B leakage current sensor is particularly suitable for DC charging piles because it provides protection not only against power frequency AC and pulsating DC residual current, but also against sinusoidal AC, smooth DC, and composite residual current at 1000Hz and below.
Sum up
Leakage protection of DC charging pile is an important part of ensuring charging safety. Through a variety of protection measures and technologies, electric shock accidents can be effectively prevented and the safety of users and equipment can be protected. With the rapid development of the electric vehicle industry, leakage protection technology is also constantly improving to adapt to higher safety standards and user needs.
DC CHARGING PIlE SERIES
DC charging pile is an efficient charging facility for electric vehicles, which uses direct current (DC) to directly charge the vehicle battery, significantly reducing the charging time. Compared with traditional AC charging piles, DC charging piles are able to provide higher power output and can usually charge an EV to 80% of its capacity in 30 minutes, providing users with a convenient charging experience.
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