This project is located in Maldives. The purpose of the residual current relay installed is to detect the residual current and compare the residual current value with the base value. When the residual current value exceeds the base value, it will send out a mechanical on-off signal (to make the mechanical switch tripped or the acousto-optic alarm device send out an alarm).Residual current relay usually with low voltage circuit breaker or low voltage contactor, etc combined residual current protection device, mainly applied to ac 50 hz, rated voltage 400 v and below the TT and TN system distribution circuit, used to ground fault protection electric circuit, prevent equipment damage caused by ground fault current and electrical fire accident, also can be used to provide indirect contact to person get an electric shock risk protection, and therefore is widely used in low voltage power supply and distribution system.
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The company in Indonesia who make the traffic light system and need to use DC hall sensor to transmitter the DC current to 4-20mA analog signal output. After they choose the hole size, input ratio, output ratio and working power supply, the customer chose
Abstract: As one of the clean energy sources, the installed capacity of wind farms has grown rapidly in recent years. Wind farms are divided into onshore wind farms and offshore wind farms. Generally, they are located in remote locations, with scattered
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