what is the difference between on line UPS & INVERTOR

2 Answers  

---

1) What is difference b/w impedence relay and differential relay? 2) what are substations equipments? 3) what is difference b/w circuit breaker and isolator? 4)what are the types of circuit breakers? 5) which medium is mostlty used in circuit breakers and why it is used?

1 Answers   NTDC,

---

We are installing a 1.6 MVA transformer at our crusher plant and the feeder of HPSEBL is 2 km away at substaion . and a VCB is installed in the substaion which is 2 km away from transformer so we need another VCB near the transformer.

2 Answers   SCPL,

---

what is the difference between effective earthing and resistive earthing?

3 Answers   REL,

---

what material is the electrical housing wire made of? is there any difference for the telephone lines?

0 Answers  

---

---

If load is 240 kw & pf is 0.8 lagging, than how to increase it from0.8 to 1.0(unit),which rating capacitor used, please give me Calculation. What is effact of consumer & suplier if pf is lagging or leading with on effect machines/ TF/GE etc.

6 Answers   L&T,

---

list down a few application of ac & dc in a generating station?

1 Answers  

---

Dear All, If we have 8No. 11kV cables running underground that are required to supply 20MW to a new development. What is the sustained current in Amps? Please advise.

1 Answers  

---

what is the saturation point of crgo lamination.

0 Answers  

---

how to measure the voltage drop in cables also give formulas to calculate.

3 Answers   Cable Wireless,

---

what is the differn bitween RCCB &MCB

3 Answers  

---

what is the maximum temperature rating of a thhn insulated conductor?

0 Answers  

---