Answer / ajit

it is a protective zone relay it sence the vector
difference between two or more similar quantities.
generally it is current operated .at normal operating time
the sum of Ia+Ib+Ic=0 ,but in abnormal conditation the
resultant current will not zero some current will flow
through trip coil & trip the circuit. most differential
relays are baised current differential current.

How to calculate cable sizing

5 Answers  

---

What is the maximum current carrying capacity for both copper and aluminium cables for 1sqmm?

2 Answers  

---

In the UVR(Under Voltage Relay) there is a knob for the hysteresis setting. what is this setting? its threshold is given from 5% to 50%. please help me....

2 Answers  

---

what are doing the duall connetion in tree phase 10hp or etc motor with circuit diagram

1 Answers   Mukand,

---

what is real , reactive and apparani power

1 Answers  

---

what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?

0 Answers  

---

dear friends plz send link about reluctance & universal motor .thank u

4 Answers  

---

What is the make of breakers, transformers, generators? What are their capacities and ratings?

1 Answers  

---

what do you mean by switchgears?

5 Answers   Practical Viva Questions,

---

In Transmission System if the potential difference at the two end of line are same then is the transmission of power will continue ? if yes then how.

1 Answers   IOCL,

---

how we sesign the transformer give some specifion regarding design of transformers

0 Answers  

---

How to select, design,size & calculate for 11 KV/33KV/66KV/132KV/220 KV/440 KV circuit breaker for HT side of transformer protection/HT distribution protection?

0 Answers   Panacea,

---