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Earth Fault

5/27/2014 12:58 PM	Rate (0)
Scorpio31 Posts: 47 Rating: (8)	Hey Friendz. How an ACB in Low voltage detects earth fault. For 1000A ACB and for TN-S earthing system what could be the earth fault value and how will it tackled by 3WL ACBs of Siemens. Pls reply.
Scorpio31 Posts: 47 Rating: (8)
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5/27/2014 1:13 PM	Rate (1)
SMHZ Bronze Member Joined: 10/19/2012 Last visit: 4/17/2022 Posts: 315 Rating: (9)	To find the value of earth fault current at any point in a network, a sum is made of the earth fault impedances in the network between the source of supply (including source impedance) and the return path impedances. Source: http://myelectrical.com/notes/entryid/192/fault-calculations-introduction#myID1310035

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5/27/2014 1:21 PM	Rate (0)
Madhava Silver Member Joined: 11/26/2011 Last visit: 4/11/2025 Posts: 508 Rating: (23)	Please go through the link for calculation of earth fault value Link

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5/27/2014 4:29 PM
metwally mustafa Silver Member Joined: 10/10/2010 Last visit: 7/5/2025 Posts: 309 Rating: (15)	earth fault can be detected by electronic earth fault device by means of kirshhoff low

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5/27/2014 7:08 PM
@nkur Posts: 202 Rating: (16)	metwally mustafa earth fault can be detected by electronic earth fault device by means of kirshhoff low Hi there Can you please tell me which KIRSHHOFF LAW is applicable??also do provide the details it will be highly appriciated.
@nkur Posts: 202 Rating: (16)
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5/28/2014 7:55 AM
Chetan2490 Advanced Member Joined: 5/12/2014 Last visit: 9/9/2020 Posts: 149 Rating: (16)	Dear, Fault calculation broadly means calculation of fault current in any electrical power system. There are mainly three steps for calculating faults in a system. 1) Choice of impedance rotations. 2) Reduction of complicated electrical power system network to single equivalent impedance. 3) Electrical fault currents and voltages calculation by using symmetrical component theory.

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