The primary terminal of the potential transformer is connected to the line for measuring the line voltage. Commercially available relays and meters used for protection and metering, are designed for low voltage. This transformer step down the voltage to a safe limit value which can be easily measured by the ordinary low voltage instrument like a voltmeter, wattmeter and watt-hour meters, etc.

It is specially designed to maintain an accurate voltage phase angle reference between the source and the Instrument Transformer`s output along with excellent voltage regulation to obtain accurate voltage measurements.

Potential Transformer Symbol. Potential Transformer Represents potential transformers usually mounted in assembled equipment. If there is a galvanic connection between more than one current transformer, these shall be grounded at one point only (e.g. Potential transformer or voltage transformer gets used in electrical power system for stepping down the system voltage to a safe value which can be fed to low ratings meters and relays. A potential transformer is a conventional transformer having primary and secondary windings. Electromagnetic induction produces an electromotive force within a conductor which is exposed to time varying magnetic fields. Transformers are used to increase or decrease the alternating voltages in electric power … The following transformer symbols show some standard electrical transformer symbols for industrial control systems such as magnetic core symbol, inductor symbol, choke symbol, variometer symbol, transductor, induction, induction voltage, current transformer, linear coupler symbol, etc. POTENTIAL TRANSFORMERS (PT’S) Lesson 11_et332b.pptx 23 Potential transformers reduces high voltages to 110-120 Vac range High accuracy transformers with minimum power loss and very small voltage drop. A ratio of 480 to 120 volts shown. This is a simplest form of potential transformer definition. Fig.4: Potential Transformer Symbol You May Also Read: Difference between Core type and Shell type Transformer This article keys out the main differences between Current and Potential Transformer on the basis of several factors such as function, connection, use, primary and secondary windings, excitation current, core, types, and applications. Horizontal Symbol Vertical Symbol Description HXF1CT VXF1CT CT Current Transformer HXF1CTR VXF1CTR CT (Flipped) HXF1T1 VXF1T1 Current Transformer 2 HXF1T30 VXF1T30 With 2 Secondaries - Independent Magnetic Circuits HXF1T31 VXF1T31 With 2 Secondaries - Common Magnetic Circuit HXF1T32 VXF1T32 With Tapped Secondary Winding HXF1T33 VXF1T33 With … If the cores are not used in a current transformer they must be short-circuited be- tween the highest ratio taps and shall be grounded.
Ground (Earth) Represents a …