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POWER FAILURE BACK UP

Created by: Johnluck at: 3/29/2012 12:17 PM (4 Replies)

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3/29/2012 12:17 PM	Rate (0)
Johnluck Experienced Member Joined: 3/29/2012 Last visit: 1/8/2025 Posts: 62 Rating: (0)	I want to use logo for automatic changeover between a generator set and the public power suppl. Is it possible for the change over to take effect since there will be no power supply to the LOGO! again at the instance of the power failure. How then can the execution of the circuit proramm possible then when there is no power supply to LOGO!. Pls I NEED AN EXPLANATION OR SUGGESTION ON HOW THIS WILL BE POSSIBLE.
	johnluck
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3/29/2012 12:27 PM	Rate (0)
Helmut_13 Posts: 2930 Rating: (432)	Hi, No Power, no operation! You can use relais with change over contacts. In case of power fail use the closed contact do do some thing. Regards
Helmut_13 Posts: 2930 Rating: (432)
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3/29/2012 1:29 PM	Rate (0)
desmul24 Posts: 378 Rating: (73)	How about you use 24DC supply from generator battery for your logo and you can get supply for your main changeover contactor from generator output. But you need to have 12/24 VDC LOGO!
desmul24 Posts: 378 Rating: (73)
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3/29/2012 3:52 PM	Rate (0)
Paulvdbo Posts: 27 Rating: (1)	Use a small UPS (Uninteruptable Power Supply) to feed the 230VAC LOGO and its direct coupled relais etc.
Paulvdbo Posts: 27 Rating: (1)
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4/3/2012 8:39 AM	Rate (0)
Andres Str Posts: 26 Rating: (6)	Hi, This information can be useful. Automatic System Transfer with LOGO! https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&objid=27074055&caller=view Attachment generator-power supply.pdf (237 Downloads)
Andres Str Posts: 26 Rating: (6)
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