Answer Posted / debashisdb

Two major differences:

1. Accuracy class: Metering needs high accuracy at load
current while Protection need not have that high accuracy.

2. Safety Factor: It determines the multiplicity of load
current at which the CT saturates. Metering ct should have
lesser value so that it saturates before the meters can get
damaged due to some abnormality. Protection should have
high value since its main purpose desires the ct to
withstand high fault currents to be sensed back to the
relays.

There is another special class ct that combines the
features of both the above used for differential protection.

WHAT CAUSED THRESHOLD VOLTAGE TO EXIST?

4113

---

Is the theorem applicable to ac sources?

1101

---

What is the comparison of PILC and XLPE cable

2233

---

it is possible to rotate the DG engine dc starter with wrong polarity connections? why?

2309

---

how we can calculate 2 phase welding transformer rating or total power?

1929

---

exolain the star delta connection

2723

---

what purose of the double circuit transmission line phase of the line phase changed for circuit-1 for Circuit-2 R-Y-B B-Y-R

2333

---

Where can I get Iidian straderd specifications for electrical items or works in web? please help me.

2060

---

why the earth is taken minimum in supplying? wather it the proportional factor to getting work any equipment or a power plant?

1953

---

sir, Is their any measuring unit of knoking? please explian?

1951

---

How npn and pnp transistor works

1196

---

In a single how much maximum current and watts using

2214

---

what is mean by drives?

2054

---

we have 2.2kw,Y,3000rpm motor but 6leads found in TB what happen if we connect in delta?

1979

---

what will be the effect if you were using different brands of outlets?

1970

---