DAHU electrical specializes in the production of 0.5-40.5kv transformers. It has cooperated with many national power bureaus for 10 years and exported to foreign markets. If there is any quality problem within the warranty period, it can be replaced free of charge.
Here is some key information about the applications and technical parameters of high voltage Hv current transformers (CTs) for measurement, protection and metering:
Basic role of current transformer (CT):
CTs are used to convert large currents on the primary side proportionally to a rated current (usually 5A or 1A) suitable for use in instruments or relays.
Technical Parameters:
Commonly used current transformer accuracy levels include 0.2S, 0.2, 0.5, of which the 0.2S level has the highest accuracy and is commonly used for power measurement. Protection type accuracy levels usually have 5P and 10P levels, these levels are nominalized by the error under the rated value primary current.
Model number and meaning:
The model number of a current transformer usually contains information about its type, structure, insulation method, protection level and voltage level. For example, LZZBJ9-10 type current transformer is suitable for 10kV power system, which is used for power metering, current measurement and relay protection.
Insulation level:
The insulation level of current transformers is usually 12/42/75kV, which means they can withstand high voltage shocks for short periods of time.
Accuracy class combinations and rated output:
The accuracy class combination and rated output of a current transformer are its important parameters, for example, a 0.2S/10P class transformer has an output of 10VA or 15VA at rated current.
Difference between CTs for measurement, metering and protection:
Metering CTs are usually used for meter metering, measurement CTs are used for meter monitoring, and protection CTs are used for power system protection. The main difference between them is the accuracy and output power.
Application Scenario:
In the installation, commissioning, overhaul and other electrical tests of the power system, CT is used to convert the high current signal on the high voltage side to the small current signal on the low voltage side, which is convenient for measurement and analysis.
Other technical parameters:
Rated operating voltage, rated frequency, ambient temperature, altitude, industrial frequency withstand voltage, etc. are also important technical parameters of CT.
The above information provides some key technical and application information about high voltage Hv current transformer in measurement, protection and metering. We hope this information is helpful to you.
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Here is some key information about the applications and technical parameters of high voltage Hv current transformers (CTs) for measurement, protection and metering:
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