Which of the transformer is used as instrument transformer Mcq?

Which is instrument transformer Mcq?

Explanation: C.T. is basically used for the measurement of high currents. A P.T. is usually used for the measurement of high voltages. They are used with A.C. ammeters and voltmeters in order to extend their range.

Which of the following is instrument transformer?

A CT is an instrument transformer in which the secondary current is substantially proportional to primary current and differs in phase from it by ideally zero degree. Current transformers are used in electrical power system for stepping down currents of the system for metering and protection purpose.

What is the use of instrumentation transformer?

Instrument transformers are special transformers used to measure voltages and currents while insulating measuring and control devices from the primary circuit.

What is potential transformer Mcq?

Potential transformer (PT):

It is a step-down transformer. Its secondary voltage is very low compared to primary. It is used in high voltage lines for operating the potential coils of wattmeter, voltmeter, relays, etc. Generally secondary of PT is rated for 110 V.

What is use of current transformer Mcq?

A Current Transformer (CT) is used to measure the current of another circuit. CTs are used worldwide to monitor high-voltage lines across national power grids. Load on Current Transformer is called as a burden because Current Transformer secondary winding can’t be kept open, high voltage can do the insulation failure.

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How are instrument transformers different from shunts and multipliers?

Explanation: Instrument transformers can be used for extending the range of the A.C. instruments. In instrument transformers, readings are independent of the values of R, L, and C. But in the case of shunts and multipliers, the readings depend on the values of circuit constants.

Which one of the following instrument is commonly used to measure primary current of a transformer connect to mains?

The primary current of the transformer is dictated by the load current. Current transformers reduce high currents to a much lower value and provide a convenient way of safely monitoring the actual electrical current flowing in an AC transmission line using a standard ammeter.

How many transformers are in a substation?

A transformer substation usually has one or two power transformers, distribution equipment, control and protective devices, and auxiliary equipment.

Which one of the following is distribution transformer?

A distribution transformer is a transformer that provides the final voltage transformation in the electric power distribution system. The distribution transformer is a Step-down transformer. These are used to stepping down the voltage used in the distribution lines to the level used by the end customer.