Answer / khaleel

the main protection core especially ps class and backup
cores have higher saturation point that metering
core.....becoz they hav to handle large fault current..that
occur in faults..so its knee point will be about 600v..

Answer / nur.asidik

knee point voltage should higher than required Vkp by relay to avoid CT saturated when fault happen

an ac induction motor gets overheated when operated at a low frequency of 25 hz a instead of 50 hz. reason?

1 Answers  

---

What does the term “voltage regulation” means?

0 Answers  

---

Suppose am having the PF value .8, so how can we say that is it lagging or leading?

11 Answers   Bhel,

---

how can we test the vector group of transformer

1 Answers  

---

how to calculate units consumption for a 12 hp motor /hr.

0 Answers  

---

What are marginally stable systems?

0 Answers  

---

What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?

0 Answers  

---

why distribution transformer is uesd in Delta/Star formation?is there any significance in doing this?If yes then breif?

3 Answers  

---

for a 5hp motor to operate from 100kva generator ,what size of cable required in sqmm.

2 Answers   DSC, Indraprastha Gas Limited IGL, UltraTech,

---

why to use freewheeling diode ( diode in revers bias mode) across dc coil

2 Answers  

---

what is the applicatyons of the slipring motor and please tel me more about the slipring concept

1 Answers  

---

Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.

0 Answers  

---