Question

How are instrument transformer different from shunt and multipliers?

Answer 1

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Here's your answer...

As we all know that, instrument transformers are high accuracy class electrical devices used to isolate or transform voltage or current levels. ... The primary winding of the transformer is connected to the high voltage or high current circuit, and the meter or relay is connected to the secondary circuit.
Whereas, a shunt is a device which creates a low-resistance path for electric current, to allow it to pass around another point in the circuit. The origin of the term is in the verb 'to shunt' meaning to turn away or follow a different path.

So, difference between them is that a shunt is normally a very low value of resistance, connected in parallel with the ammeter coil. In a shunt, the potential terminals have a low current carrying capacity. A multiplier is basically a non-inductive, high resistance that is used to extend the range of a D.C. voltmeter.

Answer 2

Answer:

Readings in instrument transformers are unaffected by the values of R, L, and C. Shunts and multipliers, however, have readings that are dependent on the values of the circuit constants.

Explanation:

instrument transformer different from shunt and multipliers:

Instrument transformers, as we are all aware, are very accurate electrical devices used to isolate or transform voltage or current levels. The high voltage or high current circuit is linked to the transformer's primary winding, while the secondary circuit is connected to the metre or relay.

• Instrument transformers offer electrical separation between measuring equipment and high voltage power circuits. It guarantees operator safety and lowers the required for electrical insulation in measuring devices and protection circuits.
• The range of A.C. instruments can be increased by using instrument transformers. Readings in instrument transformers are unaffected by the values of R, L, and C. Shunts and multipliers, however, have readings that are dependent on the values of the circuit constants.
• There are two types of Instrument transformers: Current transformers (CT) Voltage transformers or potential transformers (VT or PT)
• Instrument transformers offer electrical isolation between measuring devices and high-voltage power circuits, lowering the need for both protection circuits and measuring devices to be adequately insulated while also ensuring the safety of the operators.
• Instrument transformers are made to deliver secondary current and voltage to "instruments." Meters for measurement or protective relays for equipment protection are examples of instruments. Voltmeters, ammeters, watt metres, and watt-hour metres are examples of metres.
• A shunt, on the other hand, is a device that makes an electrical current route with low resistance so that it can go around another point in the circuit. The word "shunt" comes from the verb "to shunt," which means to turn aside or take a different course