What is the difference between 0.2 and 0.2S class CT?
The metering class current transformer is used for metering the energy for revenue purposes. Therefore, the metering class current transformer must be as accurate as … Read more
CT
Why can a 50Hz CT work on 60Hz systems, and why can’t a 60Hz C.T. work on a 50 Hz system?
CT or PT functions on the principle of electromagnetic induction. The electrical energy is first converted into magnetic energy and again the magnetic energy is … Read more
Current Transformer – Construction, Phasor and Errors
This article describes the current transformer – Construction, Phasor, and Errors. Current transformers are widely used for measuring the high current. The Current transformer steps … Read more
Instrument Safety Factor of Current Transformer
The current transformer is used for measuring the current.The specifications of the measuring class CT is as given below. The Instrument Safety Factor (ISF) is very … Read more
How to Calculate Burden of CT
Burden of the current transformer is expressed in VA. The total VA burden should be taken into account when CT is used for measuring or … Read more
Current Transformer Secondary Grounding
According to the ANSI guide, the IEEE standard specifies the current transformer grounding practices. The grounding of the current transformer is very important in the perspective of … Read more
Accuracy Class Of Current Transformer
Current transformers are used for measurement of electrical parameters like ampere, power, and energy. CTs are also used for measuring the current at fault condition, … Read more
How to Calculate Knee Point Voltage of Current Transformer?
What is the knee point voltage of CT? The knee point is defined as the voltage at which a 10% increase in applied voltage increases the magnetizing current by 50%. … Read more
Why CT Secondary Shall Never Be Kept Open?
Open-circuited CT can cause serious safety concerns like fire, electrocution, and protection failure. Therefore, you must ensure that CT secondary should always be close-circuited. Let … Read more
