Analysis on the application of current transformer in low voltage flexible DC microgrid Low-voltage flexible DC microgrids are bridges between DC-specific devices such as energy storage, electric vehicles, and distributed energy and medium-voltage DC distribution networks, and are an important part of energy Internet technology. With the development of low-voltage flexible DC technology and the […]

Research on overcurrent protection of DC microgrid based on fault current control Introduction Against the backdrop of the increasing depletion of fossil energy and the increasingly serious environmental pollution problem, the development and utilization of clean energy has attracted more and more attention. The access of clean energy to the distribution network will have a […]

Working principle and charging process of on-board charger for new energy vehicles New energy electric vehicle chargers are divided into two categories: on-board chargers and off-board chargers, depending on whether they are fixed on the car. On-Board Charger (OBC) is one of the main products of Dilong New Energy Technology Hebei Co., Ltd. It uses […]

Selection of residual current protector in charging pile     With the explosive growth of the number of new energy vehicles in the past two years, the construction scale of its supporting facilities charging piles has also expanded. In the seven years from 2010 to 2017, the number of charging piles in China has increased […]

How Type B residual current devices protect against shock  This audio was created using Microsoft Azure Speech Services     Shocks from contact with electrical conductors continue to occur every year in every country. For example, in the UK, the Health and Safety Executive documented that “Each year about 1000 accidents at work involving electric shock […]

Key considerations in designing a car charger     After switching to electric vehicles (EVs), the biggest change drivers may feel is the way they recharge differently. Specifically, they no longer need to drive to a gas station, but must find an available charging point. Although the number of public charging points is increasing rapidly, […]

Why do advanced EV charging systems need accurate current sensors?     As the use of electric vehicles continues to increase, people’s attention to the car battery system has shifted from the range to the charging time. Electric vehicle charging systems must operate safely and reliably, as improper execution can lead to inefficiencies and shortened […]

The main electrical energy measurement problems in electric vehicle charging pile introduction The contradiction between people’s growing material and cultural needs and limited non-renewable energy is an important reason for the promotion and development of new energy and related industries. China’s aggressive push for electric vehicles has also boosted demand for charging piles. Promoting the […]

Electromagnetic leakage protection characteristics robust design    Analysis of factors affecting the robustness of leakage protection characteristics Influence of compensation capacitance dispersion on the robustness of protection characteristics In order to analyze the influence of the dispersion of compensation capacitor C1 on the leakage action value, equation (2) can be obtained by transforming (4) Then […]

An in-depth study of the world of Type B residual current devices (RCDS)   Understand RCD concepts The residual current device, commonly referred to as rcd, is the basic safety mechanism in the circuit. When the current of the live conductor at a point in the phase exceeds a predetermined value, they provide protection by […]

influencing factors of electromagnetic leakage protection characteristics 1 Influence of compensation circuit parameters on leakage protection characteristics Leakage protection features include leakage action value IDd and leakage action time td. The action value IDd should be less than the rated leakage action current IDn and greater than the rated leakage action current IDno, generally IDno= […]

Electromagnetic leakage protection working principle    The electromagnetic leakage protector is generally composed of five parts: residual current transformer, leakage detection circuit (signal conditioning circuit and trip drive circuit), magnetic release device, test button and circuit breaker action mechanism, as shown in Figure 1. Fig.1 Schematic diagram of electromagnetic leakage circuit breaker    When the […]