Why is it preferred to use a wattmeter(s) to measure power in three phase systems rather than using a combination of other instruments e.g. voltmeters, ammeters etc?

2 Answers  

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if a 3 point starter is not available, how can a dc motor be started?

3 Answers   Accenture, BIT, Techno Solutions,

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in our sub station why we step down firstly 33kv\11kv then 11kv to 430v. can we direct step down 33v to 430.v.

7 Answers  

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WHAT IS THE FORMULA FOR CALCULATING CURRENT RATING(DIRECT IN GROUND OR AIR) OF ARMOURED(XLPE) CABLE OF 4C,16Sqmm?

0 Answers  

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what is linear motor?

2 Answers   Lucas TVS, wbsedcl,

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why moisture formation found in XLPE Armoured cable outer sheath

0 Answers  

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what is humming AC solenoid

2 Answers   Seagate,

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we can conformed the vector group of the transformer. How?

0 Answers  

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why induction motor having low power factor at starting time and high at full load.

6 Answers   BARC, HPB,

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how many earthing required for ups, what should be the earth voltages

9 Answers   Juniper Networks,

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What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?

0 Answers  

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why semicondoctor use in HT cable?

1 Answers  

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