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 Jun 20 2009, 02:19 PM
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#1
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Intermediate Member  Group: Full Member Posts: 37 Joined: 28-September 08 From: Kuala Lumpur Member No.: 4,848  |
Hi,
I have an application where a single generator needs to backup three different offices during power failure. Since all three offices have their own incoming supply, I have suggested to use 3 different automatic changeover contactor set which will connect the generator supply to any of the offices during a power failure. Is there any drawback with this design? Regards, Kana |
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Jun 20 2009, 08:08 PM
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#2
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Member Group: Full Member Posts: 78 Joined: 13-June 09 Member No.: 5,502 |
Hello Kana.
Would not it be more simple (and cheaper) to rearange commutations so as to unite the offices' supplies? |
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Jun 21 2009, 01:38 AM
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#3
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Intermediate Member Group: Full Member Posts: 37 Joined: 28-September 08 From: Kuala Lumpur Member No.: 4,848 |
Hi Yuri,
All three offices have its individual KWH meter. It would be more expensive here if we were to unite the supply and request for 1 KWH meter. We must also modify the existing wiring and switchboard to suit our new requirement. So to unite the supply will not be a good option. Regards, Kana |
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Jun 21 2009, 06:27 AM
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#4
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Member Group: Full Member Posts: 78 Joined: 13-June 09 Member No.: 5,502 |
Hello Kana.
That there is common supply does not mean there should be a common meater - every office mighrt preserve its own one. I meant also cables are cheaper than electronic appliencies - the more so if the offices are not too far away from each other. Major drawback here would be if a fault was internal to an office - then the other two would suffer from need of switching to back-up supply. But someone should come up with a better idea. All the best to you. |
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Jul 29 2009, 02:32 AM
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#5
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Junior Member Group: Full Member Posts: 8 Joined: 25-July 09 Member No.: 5,969 |
QUOTE (kana @ Jun 20 2009, 03:19 PM)  Hi, I have an application where a single generator needs to backup three different offices during power failure. Since all three offices have their own incoming supply, I have suggested to use 3 different automatic changeover contactor set which will connect the generator supply to any of the offices during a power failure. Is there any drawback with this design? Regards, Kana Hi Kana, Your design sounds right and I have not any better idea. I just suggest some more thing that should be considered about.
Post up here what you are you thinking of. Good luck, Hien |
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Jul 29 2009, 12:26 PM
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#6
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Intermediate Member Group: Full Member Posts: 37 Joined: 28-September 08 From: Kuala Lumpur Member No.: 4,848 |
Hi HienN,
All three offices are located on the same floor of a high rise building. Supply is fed by a tap off unit to the individual KWH meters. Then from the meters, the cable travels to individual distribution boards. My idea was to have 3 sets of automatic changeover contactor connected to a common genset. My idea is similar to what you suggest. Regards, Kana |
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Aug 2 2009, 03:09 PM
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#7
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Junior Member Group: Full Member Posts: 8 Joined: 25-July 09 Member No.: 5,969 |
QUOTE (kana @ Jul 29 2009, 12:26 PM) Hi HienN, All three offices are located on the same floor of a high rise building. Supply is fed by a tap off unit to the individual KWH meters. Then from the meters, the cable travels to individual distribution boards. My idea was to have 3 sets of automatic changeover contactor connected to a common genset. My idea is similar to what you suggest. Regards, Kana Hi Kana, Let's go with your idea. I am here and looing forward to hearing from you the good news. Regards, HeinN |
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