Answer / jeyachandran.b

THE FRQUENCY DRIVE (VFD) WITH V/F= CONSTAND PRINCIBLE

Answer / chris sullens

uses pulsed width modulation to control speed of
motor.Siemens.com has an EXCELLENT!!!! web site. Too much 4
me 2 list about. it is ACTUALLY DC that is pulsed to
motor.480 VAC X 1.414=678.72 Peak 2 Peak voltage DC Volts
at motor.Standing Wave can be up close 2 3000 VOLTS!!! on a
480 motor it is a fundamental of the Frenquency and
length.In which case U need 2 add a REACTOR [Filter] or
DELTA/WYE ISOLATION XFMR.If drive is to DC motor DO NOT
bond XO.

Name the test signals used in control system

0 Answers  

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A genarator is connected through a 20MVA ,13.8/138 KV stepdown transformer to a transmission line. at the reciving end of the line a load is supplied through a step down transformer of 10MVA,138/69 KV rating .A 0.72 PU load evaluated on load side transformer ratings as base values ,is supplied from the above system for system base values of 10 MVA and 69 KV in load circuit the value of the load in generator circuit will be ...........

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7 Answers   Bhel, Sonalika, Usha Martin, Wipro,

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what is surge??

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0 Answers   DAE,

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how ELCB drip when earth and phase touch together?

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What is the difference between emf, voltage drop and potential difference?

4 Answers  

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