• How to choose relays according to requirements?

    How to choose relays according to requirements?

    How to choose a relay:1. First understand the necessary conditions  ①The power supply voltage of the control circuit, the maximum current that can be provided;   ②Voltage and current in the controlled circuit;   ③How many sets and types of contacts are needed for the controlled circuit. When selecti... read more

    31-03-2021 Industry News
  • What is the test method of the relay?

    What is the test method of the relay?

    Relay test ①Measure contact resistance: Use the electrical barrier of a multimeter to measure the resistance of the normally closed contact and the moving point. The resistance value should be 0; and the resistance value of the normally open contact and the moving point is infinite. From this, it c... read more

    26-03-2021 Industry News
  • Advantages and disadvantages of electromagnetic relays and solid state relays

    Advantages and disadvantages of electromagnetic relays and solid state relays

    Although solid-state relays are not as popular as electromagnetic relays, they are also commonly used electrical devices. They are both relays. What are the differences? Let’s talk briefly today. Electromagnetic relay is an electronic control device, which plays the role of automatic adjustment, sa... read more

    19-03-2021 Industry News
  • What is the difference between ordinary current transformer and zero sequence current transformer?

    What is the difference between ordinary current transformer and zero sequence current transformer?

    1. The role of ordinary shunt resistors Ordinary current transformers can convert a primary current with a larger value into a secondary current with a smaller value through a certain transformation ratio, which is used for protection, measurement and other purposes. For example, a current transfor... read more

    12-03-2021 Industry News
  • What is the difference between solid state relay and ordinary relay?

    What is the difference between solid state relay and ordinary relay?

    The difference between solid state relay and ordinary relay The comparison between traditional relays and solid-state relays is related to many types. The difference between electromagnetic relays and corresponding solid-state relays is explained below: 1. Structural difference: The electromagnetic... read more

    05-03-2021 Industry News
  • How does an electromagnetic relay work?

    How does an electromagnetic relay work?

    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

    27-02-2021 Industry News
  • What are the functions of relays?

    What are the functions of relays?

    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

    20-02-2021 Industry News
  • What are the tasks and requirements of relay protection?

    What are the tasks and requirements of relay protection?

    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

    06-02-2021 Industry News
  • The function and principle of current transformer

    The function and principle of current transformer

    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

    05-02-2021 Industry News