Industry News
May 10,2024
Xindian Electric Appliance Group Co., Ltd. Environmental Information Publicity in 2024
In accordance with the requirements of relevant laws and regulations such as the Environmental Protection Law, the measures for the Disclosure of Environmental Information of Enterprises and institutions, the measures for the Emergency Management of Environmental Emergencies, the regulations on the Administration of pollution permits, and the Law on the Prevention and Control of Environmental pollution by solid waste, the environmental information of the unit in 2024 is now publicized as follows:
Sep 27,2021
What is the difference between a current transformer and a zero sequence current transformer?
The current transformer is different from the zero sequence current transformer. The zero sequence current transformer is used to detect the zero sequence current. Generally, all three live wires pass through the inner hole of the transformer, and the vector sum of the three-phase current, that is, the zero sequence current, is measured.
Sep 27,2021
Current transformer_ring network cabinet special transformer professional manufacturer!
Current transformer is a kind of commonly used equipment. The function is to convert a large primary current into a small secondary current through a certain transformation ratio for protection, measurement and other purposes. For example, a current transformer with a ratio of 400/5 can convert an actual current of 400 amperes into a current of 5 amperes.
Sep 27,2021
Secondary current transformer cannot be open-circuited
The secondary side of the current transformer is connected in series with the current coil of the measuring instrument to form a closed loop. Due to the small impedance, the secondary voltage is very low. However, if the secondary current transformer is open, the current transformer is actually equivalent to a rising transformer. If it is open for the secondary current, the secondary current is lost, the balance of current is lost, and the magnetic flux of the iron core increases sharply, resulting in a great increase in the secondary voltage, which can rise to hundreds of volts or even thousands of thousands of volts, it is not only easy to cause electric shock to people, but also may break down the insulation of secondary lines and electrical components, which is a very dangerous situation.
Sep 27,2021
How to confirm the saturation of the current transformer?
In order to study the working characteristics of the current transformer and determine whether it will saturate and affect the correctness of the protection operation when protecting the external fault from the passage of large current, it can be tested by some test methods.
Sep 27,2021
Classification of voltage transformers
Voltage transformer according to the number of windings: double winding voltage transformer, its low voltage side only a secondary winding voltage transformer; three winding voltage transformer, there are two separate secondary winding voltage transformer; four winding voltage transformer, there are three separate secondary winding voltage transformer.
Sep 27,2021
Basic structure of voltage transformer
The basic structure of a voltage transformer is very similar to that of a transformer. It also has two windings, one is called a primary winding and the other is called a secondary winding. Both windings are mounted or wound on the core. There is insulation between the two windings and between the winding and the core, so that there is electrical isolation between the two windings and between the winding and the core. When the voltage transformer is in operation, the primary winding N1 is connected to the line, and the secondary winding N2 is connected to the instrument or relay. Therefore, when measuring the voltage on the high-voltage line, although the primary voltage is high, the secondary voltage is low, which can ensure the safety of the operator and the instrument.
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