Diagram of current transformer

Electrical Tutorial about Current Transformer Basics and Current Transformer Theory on how the current transformer works with just one secondary winding. Consider the phasor diagram of current transformer shown below,. Im = magnetizing component of no load current.

Ie = Wattful component of no load current. Es and Ep = Induced voltages in secondary and primary windings respectively.

Np and Ns = Number of turns in primary .

The ideal current transformer may be defined as one in which any primary condition is reproduced in the secondary circuit in the exact ratio and phase relationship.

The phasor diagram for an ideal current transformer is shown in Figure 1. For an ideal transformer: Ip Tp = Is Ts. The primary and secondary induced voltages are lagging behind the main flux by 90º. The magnitude of the primary and secondary voltages depends on the number of turns on the windings.

NOTE: WE SUPPLY THESE METERS ON THE ASSUMPTION THAT THEY WILL BE INSTALLED BY. A QUALIFIED ELECTRICIAN FAMILIAR WITH THE INSTALLATION OF METERING EQUIPMENT. ENSURE ALL CURRENT TRANSFORMERS ARE . Working around CT Circuits: ◦ Circuit Identification.

Testing for Energized Circuits.

Methods of shorting at CT Shorting Blocks. Error in Current Transformer or CT. KT - Turns ratio = Numbers of secondary . It may be helpful to draw the phasor diagram of the secondary circuit as it now appears by taking E. One of the major difference between them is that the current transformer convert the high value of current into low value whereas the potential or voltage transformer convert the high value of voltages into low voltage.

Some other differences between the current and the potential transformer are explained below in the the . Find Circuit Diagram Of Current Transformer related suppliers, manufacturers, products and specifications on GlobalSpec - a trusted source of Circuit Diagram Of Current Transformer information. But what do we mean by: Transformer Loading.

A transformer is said to be on “no-load” when its secondary side winding is . Transformers are capable of either increasing or decreasing the voltage and current levels of their supply, without modifying its frequency, or the amount of electrical power being transferred from one winding to another via the magnetic circuit. A single phase voltage transformer basically consists of two electrical coils of wire . The importance of current transformer tests is often underestimated. Instrument transformers are high accuracy class electrical devices used to isolate or transform voltage or current levels.

The most common usage of instrument transformers is to operate instruments or metering from high voltage or high current circuits, safely isolating secondary control circuitry from the high voltages or . The principal limitation on the sensitivity attainable in any method of testing current transformers is due to the condition that the measuring circuit must not affect the performance of the transformer. This means that the measuring apparatus must not increase the equivalent connected secondary load by more than a.