Answer / debasis sahoo

During installation of Transformer on a Pole mounting structure, following checks should be made:
Ensure that the base channel of transformer is at height complying to IEC Standards:
a) Height of top of HV bushing from ground for pole mounted transformer should be 4.572 meters minimum (15 Ft)
b) Height of top of HV bushing from ground for plinth mounted transformer should be 2.75 meters minimum (8 Ft)

Ensure that base channel is horizontally leveled

Avoid jerky movement of the transformer while lifting it upwards during installation

During installation ensure that the HV bushings of the transformer are on the DO unit (or HG fuse unit) side of the structure

After installation of transformer, also check that other allied equipments such as AB switch, Horn Gap fuse units, DO Fuse sets, Lightening arrestor etc. are fitted at appropriate positions as per the applicable drawing issued by the utility.

Use PVC unarmoured cable (3 ½ core) of appropriate size and length for LV side. Ensure that the lugs are appropriately crimped at the ends.

how will you find out the fuse failure by remote operation?

1 Answers  

---

Explain and give examples about VCB?

0 Answers   AZ Engineering, Vodafone,

---

why impedance relay is used for medium transmission line protection

0 Answers  

---

How can we calculate single phase load into three phase load

2 Answers   Jindal, Tanfac,

---

what is W.T?specify the acceptable range?

0 Answers  

---

---

suppose if oil in transformer is not used than what constructional change you will do,for insulation and cooling?

2 Answers   ABB,

---

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 any one know what are the symbols at the down (below) the analog ammeter??? there are 4 symbols which are they ?????

0 Answers  

---

why power generated only 11KV not more than???????? and why power up/down is multification of 11*?=??.??? foe Example 11/33,11/66,66/11KV etc,

8 Answers   Essar,

---

what is gapless metal oxide techniques?

1 Answers  

---

What is difference is of VSD,VFD,VSDS, are they the same as the direct current to control dc using above mention

0 Answers  

---

What is meant by cold loop test in instrument

0 Answers   Transnet,

---