Answer / alleysyed

OLTC stands for On Load Tap Changer, which means that a user
can change the taps of transformer winding without
disconnecting the transfomrer from the supply. Taps are
changed in order to regulate the voltage. OLTC has number of
taps . They may be 10, 11, 16 , 20 or the customer specified
rating.
Marshalling box is a box in which manufacturer of
transformer bring alarm and trip contacts signalling from
the accessories associated with the transformer. For
example, Oil temperature indicator installed on the T/F
provide a signal of alarm when the temperature of oil
exceeds the specified limit of Indicator. If temperature
exceeds more, it send the trip signal to Marshalling box,
which disconnects the transformer from main supply and
vacuum Circuit Breaker is tripped. VCB is installed on the
High Voltage side of the TF in the HV Protection panel.

L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.

0 Answers  

---

Why most of analog o/p devices having o/p range 4 to 20 mA and not 0 to 20 mA ?

2 Answers  

---

why the field winding of synchronous machine is excited by dc source

2 Answers  

---

Why a dc generator gives result during two different condition,- 1)separately exited gen.- Eg=110 V, field current=0.25 A. 2) self exited gen.- Eg=30 V, field current=0.025 A.

1 Answers  

---

can we use ordinary transformer in place of autotransformer?give reasons also

1 Answers  

---

Why do we use series motor to start our car?

2 Answers  

---

DG cranking voltage?

0 Answers  

---

how diside ct mf exmp.200/5 ct

0 Answers  

---

three owners X, Y, z owned some tractors with them, on the first month x gave away the same amount of tractors to y and z ( as much as they possed), similarly in the 2nd month y gave of to x and z similarly by third month z gave to x and y. after this all X, Y, Z had 24 tractors each.

2 Answers   econ,

---

What are two contours of nichols chart?

0 Answers  

---

hi frnds...pls send me aptransco previous papers .....pls..pls,,,(madhar.rocking@gmail.com)and suggest me some websites

0 Answers  

---

what are the electrical components required for run the motor pump including safety components plz explain it how we can use such components .

2 Answers  

---