Answer Posted / selvan
which mode DG set connected?
manual mode- 1.battery terminal or its cable demaged.
2. low volt in battery.3. self motor problem.
4.fuel block.
auto mode- 1.EB power failure comand not going to dg
control panel. 2. DG CONTROL panel not reset.
Is This Answer Correct ? | 7 Yes | 0 No |
Post New Answer View All Answers
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?
bus bar design conditions and sizing pls tell me quickly
What effect does a very low impedance have on the Voltage regulation? On the short-circuit current?
how does high earth to neutral voltage affect electronic equipment?
Some times to change of DOR of a motor, interchange of R & B is not effected and RYB take same current, but interchange of R&Y is effected ie change the DOR. My doubt is what is the problem in motor and how it is happen.
If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables
How much no load current of synchronous motor
Starting times for soft starter & power factor is thier any standard or datas available in manufactures list. Kindly suggest.
What is main cause of cable's terminal point burned in Lug on high temperature although lug and cable selection is ok as per stantard and also tightness is ok as per situation. so please take in deep and tell correct answer thanku.
what is mean by parallel operation of permanent magnet generators
What is the voltage gain or transfer function of amplifier?
-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.
How to Calculate Current Rating of SDFU (Switch Disconnector Fuse unit) for Protectionof Capacitor Bank connected to Busbar of 800Amp,in LV side of 11/0.433KV, 250KVA Transformer?
I am a electrical engg. diploma holder,applied for junior engineer (electrical),Kolkata RRB. Have I to attend all electrical,mechanical&civil portion in written exam.???
How we can recongnise the phase displacement of transformer connection between primary & scondary...plzzz explain it with example.........