when running 2 nos 450kva dg sets in parallel operation ,in one Dg set power factor and Kvar going to lagging and ampere suddenly going high,please give me suggestion to correct the same.

2 Answers  

---

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  

---

what is the diff between earth leakage relay and earth fault relay?

7 Answers  

---

How to calculate the voltage drop of 4 Core 50 Sqmm SWA cable for a distance of 350 mtrs and what can be the maximum load connected to it?

3 Answers  

---

how to improve IR value in HT motors?

3 Answers   ABB, AMW, Macleods,

---

what is the formula for transformer oil?

1 Answers  

---

What happens if ac excitation is given to the field of an alternator

3 Answers   Aurobindo,

---

what should be the value of proper neutral earthing resistance?

3 Answers   ABC,

---

Distribution transformer we provided 2 separate earthing pit for Body and 2 separate earthing pit for neutral,we can not connect separate body earthing pit to other earthing pit but we do metal glanding in secondary side cable termination in both side, transformer and PCC panel (LT Panel), is this safe for transformer and other equipment?

0 Answers  

---

can anyone please help me to find the rupturing or breaking capacity in KA of circuit breaker (MCCB,VCB,ACB etc) of HT and LT side of a distribution transformer...please help with detailed step by step answer...thank you

0 Answers  

---

what is Insulation monitoring device. where it is used? (in switchgear room or control panel or in field equipment)

0 Answers  

---

what is meant by dielectric breakdown ? where we using HV test kit & what purpose?

3 Answers   ITC Infotech,

---