Answer / krushna ch sahoo

its not safe bcoz the instalation of the
motor & the rotor is made for 1500 rpm
speed

Answer / anil

yes absolutly safe. No problem if you use VVVF drive for
this motor.

how to carry out Magnetizing Current Test on Distribution transformer and what purpose we are doing this test.

1 Answers   CPCL,

---

HOW TO CALCULATE BATTERY BACKUP TIME & AH CAPACITY AGAINST UPS KVA RATING?

2 Answers  

---

How to check AC & DC Choke

1 Answers  

---

What is the difference between electronic regulator and ordinary electrical rheostat regulator for fans?

0 Answers  

---

where would be tap changer in transformer & why?

2 Answers   Kentz,

---

What will happened. if we feed 3phase supplay to the stater with out insert the rotor. How much current will flow through the stater winnding?

2 Answers  

---

what is VSWR?

1 Answers  

---

What is LSIG ?

6 Answers   Apollo Power,

---

What is differance between Slip ring motor and Squirrel cage Motor ?

2 Answers  

---

what is the difference between diode and zener diode?

21 Answers  

---

If we increases the %impedance of Transformer then price of Transformer will increases or decreases.

1 Answers   Siemens,

---

Dear Sirs, I am a technical persons.In one of our Electrical Sub- Station, We have installed three numbers of 1250KVA ,11KV/0.415KV Transformer to feed the Factory load. We have found some abnormality. In one of our Transformers the leakeage current from transformer body to earth through earth continuity wire is almost 86 Amp but in other transformer it is (5-10)Amp. where the load current on three phase and neutral are respectively 1360Amp,1400Amp,1370 Amp & 176Amp. So please any technical person help me about the reasons of this situation and how I can rectify the fault. Moreover,I have measured the earth resistance of the Earth continuity wire which is less than 1 Ohm. Thanks Tapas Barua

3 Answers  

---