Answer / jayakumar.k

NDR--Neutral Displacement Relay which is provided in HT
capacitor bank panels.

Answer / upendra sharma

Neutral displacement relays are used for capacitor banks,
theses realays protect system against imblancing of
capacitor bakns. Application of these relays are wye
connected ungrounded banks. relay detemines the gravity of
imbalance and isolate the bank in case of faulty capacitor
of any phase.

What is difference between incomer & outgoing type Vaccum Circuit Breaker?

2 Answers   VBG,

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when we gave dc supply to 220v dc motor its rpm is 1200. then we gave 180v. how many rpm of its motor. gave answer with calculation at my ID.... ravizak@ymail.com

0 Answers   Godrej,

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hi engineers,if suppose distribution is going to two diff village mistakenly they r interchange the neutral of twowhat happen?

7 Answers   Bhel, L&T,

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what is meant by residual over voltage & residual earth fault ?

0 Answers  

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1.generator rated as 1000 mva,11kv .8 pf what will 0.8 pf will indicate? 1.max pf it can supply 2.min pf it can supply like this 4 options there what is answer.explain

5 Answers   Power Grid,

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WHAT IS A DIFFERENCE BETWEEN A DC GEAR MOTOR AND STEPPER MOTOR.AND WHICH IS MORE APPROPRIATE TO USE FOR POSITION CONTROL PURPOSE?

1 Answers  

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i alternator which of genarator used for excitor the what is reason?

3 Answers  

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1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

0 Answers  

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What's mean HVF & HAF in Vacuum Circuit Breaker?

0 Answers   Gandhi Institute of Technology and Management (GITAM), Hyundai, Jayam Engineering Works,

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1.what is the reason for transformer and lightning arrester blast in 33kv system

0 Answers   ABB,

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X/R ratio in 11kv transmission line is?

1 Answers   RRB,

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Define the term Capacitance and Inductance?

0 Answers  

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