What is v/f control, sensor less control and sensored control for ac vfd?

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hoe to calculate Multi grade sand filter diameter,size and media qty. ?

1 Answers  

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How we install and terminate the wire of pressure transmitter and temprature transmitter. Give full explanation.

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dear friends, pls tell me why silicone oil is used as dielectic medium in pressure transmitters

0 Answers   Essar,

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What is the purpose of cost accounting?

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how can LED bulb indication work correctly without CT OR PT for 3 phase indication if one is cut then it will show the correct indication?

0 Answers   UltraTech,

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How capacitor bank can prove superior to synchronous condensers with respect to power factor correction?

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we are using centum vp as monitoring with Dell precision work station T3600 but some times PC(s) are restarted automatically . how we can solve this problem? thanks

1 Answers   Yokogawa,

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How to check DC Motor & SERVO Motor?

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Why normally we don’t use relay for digital input module?

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Distance to be maximum distance we can install instruments from PLC panel?

0 Answers   ABB, Focus,

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What is operation time?

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