Company News

What are the working principles and characteristics of voltage transformers?

The impedance of the voltage transformer itself is very small. Once the secondary side is short-circuited, the current will increase sharply and burn the coil. For this reason, the primary side of the voltage transformer is connected with a fuse, and the secondary side is reliably grounded, so as to avoid personal and equipment accidents caused by high potential to the ground on the secondary side when the insulation of the primary and secondary sides is damaged.

2023

The role of voltage transformer in the circuit?

The function of the voltage transformer is to transform the high voltage into a standard secondary voltage of 100v or low grade according to the proportional relationship for protection, metering and instrument devices.

2023

Voltage transformer and current transformer, what do you do?

Transformer is divided into two categories: voltage transformer and current transformer. Its main functions are: to accurately transmit the voltage and current information of the primary system to the relevant equipment on the secondary side; Transform the high voltage and large current of the primary system into low voltage (standard value) and small current (standard value) on the secondary side to standardize and miniaturize the devices such as measuring, measuring instruments and relays.

2023

Why do voltage transformers have several output terminals?

The voltage transformer is a transformer with iron core. It is mainly composed of 1. secondary coil, core and insulation. When a voltage U1 is applied to the primary winding, a magnetic flux φ is generated in the core.

2023

Henan Zhengzhou Power Supply Company: Scientific Supply See Results

During the peak summer this year, Henan Zhengzhou Power Supply Company strictly implemented the decision-making and deployment related to power supply protection, strengthened load management, scientifically controlled load, and formed a joint force with the government and society.

2023

Shaoyang Substation Maintenance Company to Carry out Current Transformer Replacement Work to Ensure Safe Operation of Equipment

Shaoyang News Network, December 16 (Correspondent Shen Wanda Wang Ke) "The current transformer of Xianling Line at 306 intervals has a small change ratio and a large measurement error. In serious cases, it may cause the protection device to malfunction and must be replaced as soon as possible." On December 16, the maintenance personnel of Shaoyang Substation Maintenance Company were 110 kV Xianchaiqiao Substation to rectify the problems found in the Spring Festival power supply safety inspection.

2023

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

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