Answer / ankamsreekar

phantom load, also called Standby power, vampire power,
vampire draw or leaking electricity, refers to the electric
power consumed by electronic appliances while they are
switched off or in a standby mode. Some such devices offer
remote controls and digital clock features to the user,
while other devices, such as power adapter for laptop
computers and other electronic devices, consume power
without offering any features. This later case is sometimes
distinguished as no load power.

Ref:http://en.wikipedia.org/wiki/Standby_power

Answer / shubham gupta

phantom loading can be treating as virtual loading ie for testing of equipments like full load test on transformers or induction motors if their rating is large ,so that we can work on lower voltage and current levels.

Suppose the incoming power is 11 kw, but the load require only 8 kw means how can we save or use the excess power?

3 Answers  

---

why we testing the core balance of the transformer before comissioning?

0 Answers  

---

length of 4 core cable 95mm from substation LV VFD panel to Motor at field approximately 150 meter. Motor stop and power has been isolated from LV MCC ( Substation )to disconnect Motor for services. After Motor completed service propose to reinstall and reconnect Motor Cable, found earth cable sparkling during touching at metal / motor body. Inspect by clamp meter found earth cable have current flow AC 1-2amps and all earth cable at MCC LV also have current flow as same value. why it is happen?

2 Answers  

---

what is meant by fuzzy logic? what is fuzzification and defuzzification?

5 Answers   MEIL, Power Grid,

---

What is a DC series motor?

0 Answers   Ericsson,

---

How many types of Differential protection are there? and what the special arrangement are made at the time of charging of a transformer on the Differential protection?

1 Answers  

---

How to calculate the value of capacitance of a capacitor used in power factor improvement plant if we know KVAR and voltages?

1 Answers  

---

why armature is placed in stator but not in rotor in synchronous generator ?

2 Answers   Student,

---

why there using acb enclosure in big buildings

0 Answers   Tata Power,

---

what is the procedure for three phase motor differential relay testing can it do with single phase test kit?

1 Answers   ABB,

---

I want Primary side delta and Sec side Star connection transformer . but i have received Star - Star transformer ,shall i use the same transformer by giving the only 3 ph on Primary side without Neutral connection on the Starpoint.

5 Answers  

---

ANY ONE TELL ME ABOUT generator synchronization panel panel to synchronise 3 gen of 250kva both automatic and manual. 2 gen output vol 415 3ph, 1 gen output vol 400 3ph SEND THE DETAILS DIAGRAM ON THIS EMAIL ADDRESS ayazleo@hotmail.com as soon as possilble best ragrds electrical engineer ayaz mahmood SAUDI TECH

0 Answers  

---