1618396-5

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Protection relays are components on electric systems which monitor equipment or power lines for any electrical faults. This protective device can automatically detect faults, then isolate the faulted system and reconnect it after the fault has been cleared. In the power systems of most civil and industrial applications, the application of protection relays is an indispensable part of the reliable, automated, safe and economical operation of power systems.The application field of 1618396-5 Protection Relay and its working principle are described in the following passage. 1618396-5 Protection Relay is used in electric system with voltage of AC 1140 V, current range of 10 A to 6 A and rated frequency of 50/60 Hz, for the purpose of protection against overvoltage, overload, single-phase fault, short-circuit and reverse power.1618396-5 Protection Relay is an electronic intelligent relay, including function of reminder and alert for operation invalid state, also with LCD display. The design of the device allows for two types of protection relays: single phase and three phase. The single phase type is able to monitor one single phase under protection. The three-phase type can monitor the three-phase, including the current unbalance between lines. The relay is designed to keep the circuit running when the current and voltage is within the rated range, and to disconnect from the circuit when overload or short-circuit occurs.In terms of protection principle, 1618396-5 Protection Relay mainly performs overvoltage protection, overload protection and short-circuit protection. The voltage protection uses current transformer to detect the peak of the line voltage, and it will be triggered when the voltage reaches the setting value. The overload protection detects the current supplied by the transformer, and it will be triggered when the current reaches the setting value. The short-circuit protection is based on the measuring of the total current of the three phases, it will be triggered when the total current reaches the setting value.Regarding the impact of relay setting,when setting the overvoltage and short-circuit protection, it should be noted that if the setting value is too small, the protective device will be tripped easily, which will cause unnecessary personnel and material losses; on the other hand, if the setting value is too large, it will take a long time for the protective device to sense the fault, causing a delay in protection and eventually leading to greater personnel and material losses. Therefore, a reasonable selection of relay settings is necessary and it should be strictly in accordance with the requirements of national standards while considering the specific conditions of the protected object.In order to ensure the operation reliability and accuracy of 1618309-5 Protected Relay, the user should pay attention to the maintenance of the equipment, including regular inspection and cleaning of the contacts, enclosure, installation base and the external wiring of the device; in addition, the user should also check the quality of the wiring to ensure the tight connection of the relay. In order to ensure the normal operation of the protective device in a long time, a strict implementation of periodic testing and calibration is also necessary. To conclude, Protection Relays such as 1618396-5 are an important part of protecting electric systems. It is necessary to pay attention to the maintenance and calibration of the protective device, as well as ensure reasonable setting of the device when using.

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