The delay fuses are used for the protection of?

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asked Mar 20, 2018 by anonymous

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asked Apr 10, 2018 by anonymous

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asked Apr 10, 2018 by anonymous

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asked Apr 10, 2018 by anonymous

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asked Jun 17, 2018 by anonymous

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asked Jun 23, 2020 by anonymous

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asked Jul 21, 2019 by anonymous

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asked May 22, 2018 by anonymous

For complete protection ofa 3-phase line:

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asked Jul 19, 2019 by anonymous

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asked Nov 24, 2018 by anonymous

Mho relay is used for protection of

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asked Jul 19, 2019 by anonymous

Give protection scheme used for 25kV catenary protection for AC traction.

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asked Apr 11, 2018 by anonymous

Differential protection is used for protection against

Differential protection is used for protection against (1) Phase fault (2) Unbalanced voltage fault (3) Unbalanced Current fault (4) Overcurrent fault

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asked Jun 23, 2020 by anonymous

Discuss in brief the principle of distance protection and state four advantages of distance protection scheme.

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asked Jun 23, 2020 by anonymous

State two requirements of transmission line protection.

Last answer: Requirements of Transmission Line Protection: 1) Faults on lines should be quickly detected to initiate actions to maintain system stability. 2) For very long lines the protection system must be capable ... backup protection in the event of failure of circuit breaker (nearest to fault) to operate.

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asked Jul 21, 2019 by anonymous

Explain differential protection of busbar.

Last answer: Differential protection Scheme for bus bar: Under normal conditions the sum of the currents entering the bus bar zone is equal to those leaving it and no current flows through the relay ... . The difference of these currents will flow through the relay coil causing opening of circuit breaker.

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asked Jul 21, 2019 by anonymous

Explain over-current protection of transformer.

Last answer: Over-Current Protection of Transformer: Simple over-current & earth fault protection of transformer against external shortcircuit and excessive overloads is shown in the above figure. The ... trip command to the circuit breaker and the transformer is disconnected from load or fault.

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asked Jul 21, 2019 by anonymous

Explain negative phase sequence protection of alternator.

Last answer: Negative phase sequence protection of alternator: Unbalanced loading on alternator mainly causes the negative sequence currents which generate the negative sequence components of magnetic fields. These fields ... components due to unbalance and operates the relay which further operates CB.

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asked Jul 21, 2019 by anonymous

Explain distance protection of transmission line with neat sketch diagram.

Last answer: Distance protection of Transmission line: Distance protection scheme uses impedance relay. The relay operation is based on the impedance (or distance) between the relay and point of fault. Figure shows ... than ZL and impedance relay operates which operates the CB and line is protected.

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asked Jul 21, 2019 by anonymous

Write down limitation of differential protection of transformer.

Last answer: Limitations of differential protection of transformer: 1) Due to the magnetization characteristics of the CTs used, the ratio errors change with respect to the circulating currents. 2) The pilot wires ... current (higher imbalance) due to which accuracy of sensing & operation is decreased.

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asked Jun 4, 2018 by anonymous

Which type of protection is provided on a generator to protect against stator insulation failure?

Which type of protection is provided on a generator to protect against stator insulation failure? A) Differential protection B) Overcurrent relay C) Thermocouple actuated alarm D) Reverse power relay

Last answer: Which type of protection is provided on a generator to protect against stator insulation failure? A) Differential protection B) Overcurrent relay C) Thermocouple actuated alarm D) Reverse power relay

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asked Jun 4, 2018 by anonymous

Protection of transformer from all types of faults is by using

Protection of transformer from all types of faults is by using (A) over current relay (B) differential relay (C) distance relay (D) Buchholz relay

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asked Jun 23, 2020 by anonymous

Explain with neat sketch, the Pilot wire protection scheme applied to transmission line.

Last answer: Pilot Wire Protection scheme of Transmission Line : Figure shows the single line diagram of Merz price voltage balance system for pilot wire protection of three phase transmission line. ... through the relay, which gives trip signal to the circuit breaker for protection of transmission line.

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asked Jul 21, 2019 by anonymous

Explain fault bus protection scheme.

Last answer: Fault bus protection of busbar: In this scheme, the substation is so designed that every fault on the bus bar is converted to earth fault. Under normal operating conditions, there is no current flowing ... This results in operation of relay to actuate trip coil of CB to trip the circuit.

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anonymous · Answer 1 · 2018-03-20T00:54:54+0000

answered Mar 20, 2018 by anonymous

The delay fuses are used for the protection of motors.

The delay fuses are used for the protection of?

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