what are 3 factors when selecting a contactor for a job?

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1. What is maximum permissible distance between smoke detectors ? 2. How do we decide number of smoke detectors required in a large office, warehouse, hall etc ? 3. What should be maximum height of smoke detectors ? 4. Where do we use heat detector, optical smoke detector, temperature sensitive detector ?

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explain how the power is distributed from a power plant to a consumer.explain step wise in detail

1 Answers  

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what is the difference between NC & CNC machine.what is the difference between equipment & machine tool

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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  

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what is the formula of starting current of 3phase and 1 phase motor???

0 Answers   L&T, WFP,

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what deffrence between KW $ KVA ?

7 Answers  

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how does an open delta transformer works

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In a 3 phase system a neutral exists so that any unbalanced currents can flow through it towards earth.... but a phase demands a particular current as per the load attached to it....then where does the extra current come from the goes in the neutral??....I mean in an unbalanced system a phase demands a current as per its load attached....then where does the unbalanced current come from??

1 Answers  

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why aggregate is placed all around substation ground.

1 Answers  

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What is the distance between body earthing and neutral earthing.?

1 Answers  

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what is motor capacity of 80TR chiller? and also say what is the formula related temperature, motor capacity, TR?

0 Answers   Apotex, Periyar Chemicals,

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