What is the function of CT coil?

Tape Wound CT Coil. The basic purpose of a CT Coil is to convert high current to proportional Low Current.

How does automatic power factor correction work?

Power factor correction (PFC) is a technique of reducing the undesirable effects of electric loads that create a power factor which are less than one. In this paper an Automatic Power Factor Correction (APFC) Unit is build which monitors the power factor and automatically it corrects the power factor.

What is CT and PT ratio?

CT is used to measure current while PT is used to measure voltage. CT is connected in series while PT is connected in parallel. CT ratio range is from 1 to 5A while the PT range is from 110V.

What is CT in electrical engineering?

A current transformer (CT) is a type of transformer that is used to reduce or multiply an alternating current (AC). It produces a current in its secondary which is proportional to the current in its primary.

Why CT should not be open circuited?

If the primary circuit has current flowing the secondary circuit should never be opened. This can cause very high voltages to occur due to the Ampere-Turns of the primary that start magnetizing the core. While it is acting as a transformer it will cause very high voltage peaks. …

What is the burden of CT?

The burden of CT is the maximum load (in VA) that can be applied to the CT secondary. The burden can be expressed in two ways. The burden can be expressed as the total impedance in ohms of the circuit or the total volt-amperes (VA) and power factor at a specified value of current or voltage and frequency.

What is APFC unit?

“Minimizing Penalty in Industrial Power Consumption by Using APFC unit”: A Review. It consists of a microcontroller which detects the power factor value, if the power factor goes below 0.9(lagging) during peak hours it automatically connects capacitor banks to improve it.

Why CT secondary never kept open?

If the primary circuit has current flowing the secondary circuit should never be opened. This can cause very high voltages to occur due to the Ampere-Turns of the primary that start magnetizing the core. This results in the core being saturated through a large portion of the cycle.