Answer / baljinder singh

tap changer is the part of transformer's secondary winding
which is use to increase and decrease the output voltage of
the transformer.

Answer / bharani

Transformers in general can have tappings in both primary
and secondary.
When we talk of HT transformers, tappings are provided in
the primary winding, this helps us in getting proper output
voltage by changing the tapping whenever the HT voltage
varies from the actual specified voltage.

Answer / byd

i am working at Transformer factory as test engineer, tap
changer is the part of transformer's primary winding which
is use to balance secondary voltage, for example we
have transformer which feature are: 630kva, 33/0,400 kv,
and this transformer has a tap changer , transformer
primary voltage positions are like these
HV(v) Lv (v)
28500
30000
31500
33000 ....... 400 v
34500
36000
network voltage is 33000v but sometimes it can be
increase or decrease , you can change tap changer:)
but this for no-load tap changer for distrubition
ransformer, if it is power transformer you should use
load tap changer

what is the function of closing coil in air circuit breaker?

0 Answers   Fresher,

---

Consider three heater bank connected in 3 phase star with neutral.Each heater bank connected in each phase.So each phase get 230 volts supply.my question is,during balance condition, current flow in neutral or Not

0 Answers  

---

how we can classify the circuit braker???????

1 Answers  

---

A 230 v dc series motor is connected to 230 V ac supply, then

1 Answers  

---

During underground cabling in landscape area what did we cover the cable with to prevent the electric shock & protect the cable?

0 Answers  

---

Explain the operation of variable frequency transformer?

0 Answers  

---

what is pmu

1 Answers   Alstom,

---

Why dc Supply used in Control circuit.

12 Answers   HP,

---

what are the application of over current relay?

2 Answers  

---

How capacitor connect in 3 phase supply???

1 Answers   L&T,

---

For backup batteries connection,which method is best? series or parallel ?  

3 Answers   ABC,

---

THE ROTIO OF VOLTAGE AND CURRENT IN A CLOSED CIRCUIT

12 Answers   APGenco, Constant, Lanco,

---