state working of halogen lamp?

0 Answers  

---

WHICH TYPE OF TRANSFORMER USED IN SWITCHYARD IN POWER PLANT?

15 Answers   GE, Lanco, NTPC,

---

which motor used in electric train ans how much volt.

4 Answers   Trimax,

---

in 33kv/11kv stepdown t/f why should we use Star point

2 Answers  

---

why ht line fuse wire is so thin

7 Answers   DLF,

---

---

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  

---

For some transformers we are using solid neutral earthing while some others we are using resistance earthing why ?

0 Answers  

---

The efficiency figures for energy efficient motors (in comparison with standard efficiency motor) can be generally higher by____%.

1 Answers  

---

Why VCB is required and ACB is also require? what is the BDV of Trafo of 11/33 KV

1 Answers  

---

the distance from my office to d.g is aprox 400mtrs and voltage drops ibn my office near about 40 volt what should i do p[ls suggest.

6 Answers  

---

How can i run three phase bore well motor in 2 phase while i running it by using capacitor its ams increase to 23 ams the distance from motor to stater is 1600 feet

0 Answers   Private,

---

i want to know is it possible to generate usefull power by coupling generator with motor & supply gives to motor by battery source then generator generates power. remove the battery source given to the motor & feed the supply from some of the generated power supply to the motor & motor runs continously. generator generate power contnously.is it possible ?

5 Answers   UltraTech,

---