Company News

domestic first set! Successful trial operation in Pu!

On the evening of April 22, the first domestic 252 kV environmental protection gas (clean air) current transformer was successfully put into trial operation in Puyang. This is an important measure for the State Grid Corporation to implement the national "double carbon" policy and promote the green environmental protection of equipment. It is also one of the important pilot work of the State Grid Corporation's current transformer "oil to gas" to improve the explosion-proof capability of equipment.

2023

Bozhou Power Supply: The First Explosion-proof Current Transformer Operated in 220 kV Woyang Transformer Network

In order to implement the pilot work, Bozhou Power Supply Company plans ahead of time, formulates an annual maintenance plan, tracks the production cycle and defines the installation time. Do a good job in site investigation, personnel access and other safety work requirements, compile the examination and approval of maintenance plans, pay special attention to the quality of construction technology, to ensure the smooth operation of the first explosion-proof current transformer of the national network in Bozhou 220 kV vortex yang transformer network.

2023

Main types of voltage transformers

The purpose of transformer voltage transformation is to transmit electric energy, so the capacity is very large, generally in kilovolt-ampere or megavolt-ampere as the unit of calculation; and the purpose of voltage transformer voltage transformation is mainly used to supply power to measuring instruments and relay protection devices., Used to measure the voltage, power and electric energy of the line, or used in the event of a fault in the line

2023

What are the advantages of instrument voltage transformer?

A table multi-use. The instrument transformer can convert large voltage and large current into low voltage and small current, making it suitable for the measurement range of the instrument. It can be used together; it can also be used alone, thus improving the utilization rate of the instrument. In addition, one instrument transformer can be connected to several instruments at the same time (under the premise of not exceeding the secondary rated impedance), while only one form can be used when the range of the instrument is expanded by shunt or additional resistance.

2022

Introduction of voltage transformer for transformer test

The voltage transformer for transformer test can be divided into two types according to the range switching mode, one is the common primary side switching range, and the other is the secondary side switching range. The former is generally suitable for testing places with low working intensity and low automation requirements. The second is generally suitable for places with high measurement automation requirements, high test work intensity and high environmental requirements. For voltage transformers with high partial discharge requirements, three YN wiring modes with secondary side switching range are generally adopted.

2022

Introduction of Current Transformer for Motor Test

The current transformer for motor test can be divided into primary side tap switching or secondary side tap switching according to the range switching mode. According to the characteristics of the motor test, the transformer mainly uses the secondary side to switch the range, and the secondary side can use manual transfer switch or relay to close the circuit to switch the range, which is convenient for remote automatic measurement and simple operation and maintenance. The current transformer with a primary side tap switching range can use a three-phase cage-type no-load electric switch to switch the range, which is conducive to the realization of automatic measurement.

2021

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