What is on line ups and off line ups?

2 Answers  

---

Could the power factor on electrical system can affect the registration of the kwhr meter or the CT/PT? 

0 Answers  

---

What is the function of UV coil ACB?

6 Answers   DLF,

---

1 hp single phase motor is more likely to get hot thsn inone hp 3 phase motor its true or false? If true why?

3 Answers   Focus, Focus Energy,

---

When dc supply is fed to rotor of the alternator how it work?

0 Answers  

---

is EEE eligible for getting electrical supervisor certificate ? if yes then from which state i sud apply

1 Answers   ONGC,

---

Why Diffrential and Ref relays are used together although Diffrential relay can protect Pri and Sec of Transformer

1 Answers   Qatar Gas,

---

How to determine the breaking capacity such as break down current and break down voltage for VCB and CT's.

0 Answers  

---

Is a DC Transformer Possible? if Yes, Then Why, if not Then Why?

9 Answers  

---

While starting a high capacity motor, it takes 6 times the full load current. Why it doesn't trip relay or CB's in that network?

4 Answers  

---

Zone of protection and tripping scheme of arc protection relay.

0 Answers   KSEB, L&T, Siemens,

---

For polarity test on a 11/3.3kV 2.5MVA delta-star Unit Auxiliary transformer,415V 3-phase supply was applied at the HV. Connection between Aa was made with a 2.5mm cable. As soon as power was switched on the cable caught fire and burnt. This test was then abandoned. It is noteworthy to say that a similar cable was also used in a similar transformer for the same. The cable did not burn and test was successfully completed with good result. What is wrong? Please, help me out.

3 Answers  

---