Industry Information

Update April 25, 2021

Three-phase multi-function volt-ampere phase meter standard needle-type clamp-type current transformer high measurement accuracy

Function introduction 1. The instrument adopts 65×50 liquid crystal display, high backlight display, intuitive and clear. 2. The current amplitude of the instrument is flat, and the phase can be...

Update April 20, 2021

How to connect current transformer and reactive power meter

Current transformer connection is not complicated, only four wiring forms. 1. It is the wiring form of a single current transformer. Can only reflect the situation of single-phase current. It is...

Update April 19, 2021

China's first low-voltage current transformer off-line

China's first low-voltage current transformer automated calibration line for metering was rolled off the line in Qinhuangdao, Hebei, and passed the project acceptance of the State Grid Expert Group....

Update April 12, 2021

The highest domestic voltage: Lake Research and development of the first 765KV inverted current transformer

Recently, Hunan Electric Power Porcelain Electric Appliance Factory developed the first domestic 765KV inverted current transformer. It is understood that this is the highest voltage level current...

Update April 07, 2021

Hunan Power Current Transformer Innovative Project to fill the gaps in the domestic high-voltage AC-DC technology

November 9, State Grid Hunan Power Maintenance Company technical staff are "high voltage AC-DC photoelectric current transformer board detection and fault diagnosis strategy" project to further...

Update April 07, 2021

The answer to the residual current transformer rated current

The answer to the residual current transformer rated current First, the residual current transformer rated current must meet the load rated current needs, such as the rated current of 250A or more....

Update April 03, 2021

Difference between the principle of voltage transformer and current transformer - Database & Sql Blog Articles

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin inductance The main difference is that the working state is very different during normal operation, mainly as...

Update April 03, 2021

Talking about Transformer Protection and Current Protection of Current Transformer Saturation Point

To study the working characteristics of the current transformer, confirm whether it will saturate when the external fault passes through a large current and affect the correctness of the protection...

Update March 25, 2021

What conditions should the standard current transformer used to calibrate the current transformer meet?

Current transformer used in a standard assay shall meet the following four conditions at the current transformer: (1) The standard current transformer should be two accuracy levels higher than the...

Update March 20, 2021

Current transformer function and working principle _ The role and working principle of voltage transformer _ voltage transformer and current mutual

In order to transmit electrical energy, the power system often uses AC voltage and high current loops to send power to the user, and cannot directly measure with the meter. The function of the...