Answer / ahmed mustafa

Transformers have errors arising from both Watt metric and
magnetizing current losses that cause deviation from the
ideal and the interconnection between them may have unequal
impedance, this can give rise to spill current through the
relay even if no fault has been detected.

Answer / max

current in relay in no-fault condition

Answer / tahsinullah

The current which flow in the Over-Current-Relay during fault is called Spill current.

Answer / shaikh

The ratio of primary to secondary current and produces the
spill current in relay.

why output is out of phase in case of common emitter?

0 Answers  

---

what is the difference between relay and a contactor.

5 Answers   Siemens,

---

i wanna know that star point in transformer becomes as a neutral on secondary side now tell me that how is that possible?because if joit the all three winding ends with each other it can b short circuited.dut it doesn't.WHY?pls Answer me in brief.thanks alot

1 Answers  

---

if i have 5kw,9A,three phase induction motor,if i want to install it 100 meter away from its feeder,how i will culculate cable size for this load.

2 Answers  

---

why earth fault current is always less than the o/c

2 Answers  

---

---

what is the difference betweem star connected motor & delta connected motor?

0 Answers  

---

i have 3500 amp load and select current transformer and perches.how i calculate .please understand

0 Answers  

---

why designer use kva rating instead of kw in transformer rating???????????????

9 Answers  

---

how to check the 3ph capacitor is good or not.

14 Answers   MacLellan, Yash Technologies,

---

what is the need of capacitor in transmission lines?and how it works.

2 Answers   SCCL,

---

How to connect frequency meter in metering circuit?(single phase and three phase frequency meter)phase to phase or phase to neutral

7 Answers   ABB,

---

How to increase solar cell efficiency ?

1 Answers  

---