It is mainly composed of iron core coil, armature (moving iron core), spring, moving contact, static contact and some terminals. Static contacts include normally closed contacts and normally open contacts. Under normal conditions, the moving contact is closed to the normally closed contact. As long... read more
The Latching Relays is an automatic switching element with isolation function. When the change of the excitation amount in the input loop reaches a specified value, the automatic circuit control device can make the controlled electric quantity in the output loop undergo a predetermined step change.... read more
1. The task of relay protection In order to ensure the safe operation of the power supply and distribution system and avoid the impact of overcurrent caused by overload and short circuit on the system, different types of overcurrent protection devices should be installed in the power supply and dis... read more
The role of current transformers: the currents vary greatly in the lines of power generation, transformation, transmission, distribution and power consumption, ranging from several amperes to tens of thousands of amperes. In order to facilitate measurement, protection and control, it needs to be co... read more
Mutual inductor, also known as instrument transformer, is the general name of current transformer and voltage transformer. It can turn high voltage into low voltage and large current into small current, so it can be used for measurement or protection system. Its main function is to convert high vol... read more
The shunt is used to measure the DC current. It is made according to the principle that the DC current produces voltage at both ends of the resistance when it passes through the resistance. It is made of insulating ceramics with uniformly distributed holes. The protective gas from the welding torch... read more
A shunt is actually a resistance with very small resistance. When a direct current passes through it, a voltage drop is generated for the display of a direct current ammeter.The DC ammeter is actually a voltmeter with a full scale of 75mV.DC ammeter and shunt are used together.For example, the curr... read more
The basic structural components of the electrical connector include: 1.Contact The contact is the core part of the connector to complete the electrical connection function. The contact pair is generally composed of a male contact and a female contact, and the electrical connection is completed by t... read more
Rated operating voltageRefers to the voltage required by the coil when the relay is working normally. Depending on the type of relay, it can be either an AC voltage or a DC voltage.2. DC resistanceRefers to the DC resistance of the coil in the relay, which can be measured by a universal meter.3. Pu... read more
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