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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.

28

2023

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07

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.

28

2023

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07

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

28

2023

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07

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.

28

2022

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07

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.

10

2022

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01

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.

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2021

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11

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