Answer / sushil

Is A Primiry Pump Use On 500 KVA Above Diesel Generater
Starting Before serculate On Engine Oil

Answer / shri..

Priming pump is used for resecularating the engione oil.

Shriram

TNC switch is also available in 1NO+1NC. What does it mean ?

1 Answers  

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can you any one give exact mathematical relation between AC current and DC current?

0 Answers  

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what is the purpose of high speed earth switch in gas insulated substat

0 Answers   ABB,

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On load tap changer (OLTC) explode? Transformer Vector group: Ynd11 Rated Power: 353MVA Rated Current: 693A Voltage:294/20KV OLTC Type: T III Y1000 110/c 12193w Max Operation Current: 295A Step Voltage: 550V Arrangement in Tx windings: Y Connection Problem: Damage of Unit 1 Generator Transformer On Load Tap Changer (OLTC) Description of Incident: 9.00 a.m. :- Generator No Load test on excitation system started 10.30 a.m :- Carried out AVR change over test 11.30 a.m :- Preparation for Generator Manual Synchronizing test 12.00 a.m :- Manual Synshronizing test started. Observed incoming generator voltage higher than running voltage. CECR operator operated Generator Transformer OLTC to bring down the incoming generator voltage 12.03 a.m :-Generator Transformer abnormal alarm operated at Gen.Control Desk (CECR) CECR operater at Generator transformer bay informed that the transformer oil splashed out from OLTC. CECR operater informed that he heard explosion inside OLTC. Observed Oil level & Oil Flow alaram operated at Tranformer local annunciator. 12.05 am :- CECR operator 'Open Gen Field Breaker” 12.10 a.m. :- Elec1 team inspected the OLTC and found the OLTC rupture disk was broken and oil spilled at OLTC area. - Elec1 found the OLTC top cover bulging. Do anyone know why and possibility cause happen in this OLTC.

9 Answers  

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what is single phase motor?

5 Answers  

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HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.

0 Answers   Areva,

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What is the difference between Off line UPS and Line interruptible UPS?

1 Answers   Etisalat,

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AMF (auto mains failure) control for DG sets at home.

1 Answers  

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what is electric traction?

26 Answers   TCS, Volvo,

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What do you mean by dependent and independent voltage sources?

0 Answers  

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what is voltage,current,restance,. what is single phase&three phase motar. what is basic electrical 'farmoulas. what is defirens quetions of electrical maintenance.

2 Answers  

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how the earthing point or earthing is taken for ships and airplanes?

1 Answers  

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