Answer / neoveyron

CTUM 15 is a alstom make electromechanical relay used for the Sensitive earth fault protection for feeders by means of a CBCT. These operate on the principle of leakage current measurement by means of a residual connection of CT or a CBCT. These can be set for 1% to 16 % of CT ratings. The time dial settings can be set from 60 milliseconds to 750 miliseconds. These provide protection against high resistance ground faults on an earthed system.

what happenes if two voltage source connected in parallel will be connected to load.

3 Answers   Efftronics Systems,

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What is the maximum breakdown voltage of 11KVA and 66 KVA power line and how it is calculated?

0 Answers   Anglo Platinum, Narnarayan Electrical,

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Wheather there exist any dc transformer

6 Answers  

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Why cant we connect the motor output to generator and then generator output to motor ?

4 Answers  

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Why high Voltages come in multiple of 11, like 11 KV, 33KV, 66 KV, 132 KV etc.

11 Answers  

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Testing report of Earthing of 3.15 MVa PTR.

0 Answers  

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Why Transformer Neutral having one earth pit ( more earth electrode resistance) whereas body have many earth pit ( less earth electrode resistance)?

0 Answers   OPS,

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what is buchholz relay?what is it used for?

8 Answers   Engineers India Limited, NFCL,

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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 will be happend if we not ground CT secondary?

3 Answers   Enercon, Engro, THDC,

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what happen when increase or decrease size of lamp,light.glass.

0 Answers  

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If a HV Underground Cable (13.8KV) is layed in the ground below 1.5 Mtrs and any building construction is done on the Cable route. IS this allowable or Not? What should be the clearance. As per ISO construction on HV cable route is safe or Not? Why? Can any body suggest the site for my question?

1 Answers   ZCL,

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