Answer Posted / pawan

There are three parts in AC drive
1. Rectifier ckt
2. Regulator
3. Invertor ckt (IGBT used)
Using AC drive we can change the frequency of motor by
varying the frequency of input/supply voltage.

What is Erosion in a control valve?

2118

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If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , so what to do for solve this problem. The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?

2069

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what is the process to make control schematic ?

2231

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I need control valve ISA hand book. Is there any site to download that big book containing all the pages. Written by Paul Friedmann

2248

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How earthing can be checked????

2388

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TECHNICAL/ARTITUDE

2218

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A flange is used for instrument connection for a system with a design temperature of 316C (600F) and a design pressure of 1000 kPa (145 psi). What is the class rating of the flange to be used for this application? Explain your answer

2628

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How to calibrate Toxic gas detector?

1689

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what does it mean an active front end in vfd plz explain it briefly

1851

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Can please tell mi about SIOS, PRM, SERVER, and what is the diference between PIN LAN, PCS LAN,APC Server, and please send the Doc if possible for referance,mail id patil_amit17@yahoo.com

1953

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If i have 4 Allen Bradely make RS logix 5000 PLC and for viewing that we are using 4 RS view SCADA for 4 different packages. Now, I will want to view two packages on only one SCADA. Then how i will do it?

2360

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what is droop in governer ,type of droop ,how it work

2139

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Meaning of the following a. IOP- Manimum; b. IOP- Maximu,;

2159

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you must show the examples application and give at least 4 types of transducer/sensors that can minimize the failure during the manufacturing of the resistors.

3314

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how many type of plug are used in pneumatic control valve,name them.

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