Answer / zahid

Kindly note that capacitor banks are usually installed at
distribution sides not generating ends. This is due to the
fact that capacitor banks provides reactive power to the
network to improve power factor. If we implement capacitor
bank at HT side we have to increase cable cross sectional
area and Trafo copper winding. If you want specs then email
me at zahid.mushtaq@tuwairqi.com.pk

Answer / swaroopreddy

use of capacitor at HT side may be usefull if installed at
distribution yards, but it will be very much use full if it
is at load end, which redeuces line losses

RATING OF LIGHTENING ARRESTER FOR 11 KV LINE IS 9 KV BUT WE KNOW THAT LIGHTENING ARRESTER IS USED FOR OVER VOLTAGE PROTECTION SO WHY NOT THE RATING OF LIGHTENING ARRESTER BE MORE THAN 11KV ???????????????//

5 Answers   Hakel,

---

dear all, in motor operation , motor is of 100 hp and bimetal relay setting is 130 amp, if relay is getting tripped on 120 amp balance current what can be the reason? Relay is newly replaced. I dont know but is there any frequency effect in thit case? Can frequency variation affect bimetal relay operation?

1 Answers  

---

A group of machines (wind turbines) connected with 33KV feeder and each machines are having individual VCB. The 33KV feeder connected with 110KV/33KV substation. The 33KV feeder tripped by over current at Substation and fault recorded at Substation as OC-R&Y phase. Same time the group of machines VCB tripped by over voltage, the fault recorded voltage was above 66KV by numerical Under/Over voltage relay. While grid drop time, this much of voltage hike is possible?

1 Answers  

---

what is effect of reverse c.t connection on metering.

4 Answers   Cushman Wakefield,

---

Why in KVA diesel engine? Why not KW

3 Answers  

---

---

what is the effect if we add capacitor on DG supply, it has any loss or benefit.

6 Answers  

---

For 6600/433 distribution transformer we apply secondary side 433 volts how much voltage in primary side.

2 Answers  

---

How one can say about a device (e.g: a light holder contains 20 or 30 L.E.Ds which glows when power supply is off, from which source they are getting the supply..... battery or capacitor) without removing and opening up its case ?

1 Answers   CMC,

---

what is zero sequence curr ent ?

4 Answers  

---

ITI r/tv trade APPLY (J.T.O VACANCEY) ALSO INCLUD AITT ELECTRONIC,WRITEEN XAM DONE 23.03.10 BUT NO RESPONCE WHY ANATHER ID gopal_gh007@rediffmail.com

0 Answers   KBC, wbsedcl,

---

In Single Phase AC Supply,If Voltage between Phase and Neutral is 230V means what will be the Voltage between Phase and Earth?

2 Answers  

---

Recently we had experienced following problem All RCCB breakers (connected to the load as well as spares) connected to various UPS systems at various floors at a high rise building tripped during a power break down and upon starting up of generator.This Generator is recently inducted into the installation. Can any one explain the reason behind this tripping. Regards Viswanathan

1 Answers  

---