Answer / ajeet pratap singh(power palnt

Ratio test is performed in transformers, CT , PT to know the actual voltage ratio .
here we will explain about PT ratio test.

As we know that PT contain Primary winding (A1 _ A2) & its secondary is S1 & S2.

Now Connect A2 to earthing link.Take 220 V ac supply from external source.
Connect A1 to phase of 220v & connect earthing link to neutral of 220 v AC.
Now use multimeter in secondary side.If PT ratio is 132/110/1.732
Then in secondary side multimeter will read 0.196volt. If this value is not found then ratio test is not ok.& voltage ratio is improper.

Why 15Amp. MCB is suitable to carry load of 1.5Ton Ac please Explain?

0 Answers  

---

what is the requirement regarding earthing of Single conductor with AWA

0 Answers  

---

1. What is differential relay? How it operates?

3 Answers  

---

Capacitor bank require for 1000amp load

2 Answers   Biodeal, Pharmaceutical,

---

what are the advantage and dis-advantage of 3 phase 4 wire energy meter?

0 Answers  

---

---

What is the name and type of power transformer oil?

4 Answers  

---

why current is constant on d.c?

0 Answers  

---

11 kv metering is done in my factory.Meter show PF 1.000 but kvarh lag&lead show 24&94 respectively & Avg.PF is .956 .? is what i do for inproove my PF to 1.000

3 Answers  

---

What differance between Circuit brekar and Isolater?

14 Answers   TATA,

---

how we can check the CT & VT?

2 Answers  

---

I have a transformer 3phase 11kv/410v and its name plate missing. now how can I judge its rated kva?

2 Answers   Coca Cola,

---

define reactive power?

3 Answers   Alstom, TATA, TCS,

---