Answer / amit

Function
The earthing truck has the function of connecting the
busbars in one
half-switchboard to earth. Naturally, the earthing
operation must be carried out
when de-energised so as not to create a short-circuit.

If the generator will trip, what you will do as an electrical technician in charge.

1 Answers  

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what is meant by damper winding ?

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WHY TRANSFORMER RATING IS MENTIONED IN KVA RATHER THAN KW

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how we select ac fuse rating of an power inverter???

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Is pure capacitor load and pure inductor load is an linear load? pls justify

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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 convarts RRA in alternator ,AC to DC or DC to AC,

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wht do u mean by load in circuit.wht dp u mean by inductive load

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how to measure the A.C flux .-instrument

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what is vch ?

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