Answer / hardik vyas

TAN Delta test gives you the condition of the insulation
and also it helps in predicting that how long this
equipment can be in service. In short it gives you the
detoriation rate of insulation so you can predict the
remaining useful period of perticular euipment.

Answer / ashish barak

when insulation is perfect , there is only capacitive
current and angle between current and voltage is 90 degree.
as insulation degrades with time there is a flow of
resitive current also. the angle between capacitave and
resultant current(sum of resitive current and capacitive
current)is this "delta" angle.
as it keeps on increasing it indicates winding is
deterioating

Answer / swati patkar

for checking transformer bushing insulation so that the life of transformer can be predicted and maintenance and replacement should be done timely.

Answer / venky_eee07

to checking transformer bushing

we have 3.5MVA-11/6KV transformer. how can we calculate earth fault current and NGR calculation?

0 Answers   IGC,

---

A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?

0 Answers  

---

what is mean by drives?

0 Answers  

---

how we calculate the dick for a pole?

0 Answers   Power Grid,

---

THE 40 MW OF POWER FOR 220 V III PHASE POWER CONNECTION REQUIRES HOW MANY KVA POWEER REQUIREMENTS

7 Answers   Chartered Accountant,

---

In a Capacitor the electric charge is stored in:

2 Answers   TELK Transformers And Electricals Kerala Limited,

---

how rating of transformer is selected for any new plant/what kind of load is cosidered/what kind of fadtors are considered/ pz give standard procedure

2 Answers  

---

Is there any relation between transformer capacity and its bdv?

1 Answers  

---

How many gap between finger contact in a.c.b. and v.cb.?

0 Answers  

---

what is the difference between isolator and circuit breaker

3 Answers  

---

draw a dol with the following rtds,stop/start,ct,vt and o/l supply is 6.6kv and the coil is 110v

1 Answers   Anglo Eastern,

---

What is the Designing & Selection Procedure for a DG/Transormer of rated capacity?

0 Answers   SCS,

---