Answer / ashwini kumar

generally two type of accuracy class 5P and 10P.Here, 5P
indicates that this is the protection type of CT with
composite error of <5% at rated accuracy limit primary
current & 20 is the rated accuracy limit factor (RALF) for
the C.T. i.e. overcurrent = 10*nominal current.

[RALF is the primary current up to which the CT is required
to maintain its specified accuracy with rated secondary
burden connected expressed as a multiple of rated primary
current.]

When we are working on transformer(132\11KV). we are going to isolate the transformer from both HV side and LV side. then we are applying grounding on both side. My question is that we required to isolate the VT which is still connected from secondary side.?

1 Answers  

---

Can we convert off load tap changer transformer to on load tap changer transformer

2 Answers  

---

what will be the difference on output when 3phase I.M. is given a delta or star supply?

3 Answers  

---

Why 60Hz frequency is used in America what are all the benifits?

5 Answers  

---

what are the main problems that happen in an emergency light and how to fix them ?

2 Answers  

---

Can we inject more current in ct primary paralleling 2 loading transformers/Injection kit at a time?let ct ratio be (5000/1A)(per kit rating 2000A range),i need to inject 5000A,if this cant b done means wat is d optional?

1 Answers  

---

ell me capacitor bank chossen formula.load in KW

1 Answers  

---

can any one tell me the formula for calculating the power and unit consumpetion

9 Answers   Avalon,

---

What are the types of the glands and difference between single and double compression type of cable Glands.

0 Answers   ABC, All Trades Electrical,

---

WHY CURRENT DECREASES WHEN VOLTAGE IS INCREASED IN A CURRENT TRANSFORMER ?

5 Answers   Sterling Wilson,

---

Can any body describe me why a soft starter is used for 6.6kv induction motor instead of VFD ?

1 Answers   Cairn,

---

how much kn lightning arrestor is used in 11kv line

8 Answers   Power Grid,

---