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SITOP Output 24V/40A broken

Created by: makaveli at: 5/21/2011 8:28 PM (21 Replies)

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5/24/2011 9:08 AM	Rate (0)
umencho Diamond Member Joined: 3/21/2006 Last visit: 1/14/2025 Posts: 10239 Rating: (1182)	Just open it and check incoming points. Basically if you have electrical drawings of it will be easier to understand what and where could be the problem. But if you are good electrician after opening and measure there will understand the reason/s for its fault. Then is the hard job - is it possible to repair it... The point is, you should understand the reason for it in all cases. Is "outside or inside" of SITOP? Best regards, Hristo Mihalev

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5/24/2011 1:27 PM	Rate (0)
makaveli Posts: 259 Rating: (5)	Hi, The are broken Bridge DBI6-16 inside SITOP. Check the attachment With regards, makaveli Attachment Sitop-Bridge.zip (354 Downloads)
makaveli Posts: 259 Rating: (5)
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5/24/2011 3:22 PM	Rate (0)
umencho Diamond Member Joined: 3/21/2006 Last visit: 1/14/2025 Posts: 10239 Rating: (1182)	I don't think you will have any troubles to repair it.If weassimed this SITOP worked long time,I think mightaccept its fault.Anyway, thank you for feedback. Good luck! Best regards, Hristo MIhalev

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5/24/2011 9:04 PM	Rate (0)
makaveli Posts: 259 Rating: (5)	Hi, You welcome. I also thank you for your time and nice conversation. With regards, makaveli
makaveli Posts: 259 Rating: (5)
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5/25/2011 9:34 AM	Rate (0)
makaveli Posts: 259 Rating: (5)	Hi, Unfortunately second SITOP was broken. This is really strange because before Power module I have automatic fuse for 6A and much more earlier on each phase 20A and at the output is 32A fuse (primary was 40A but after first Sitop burned I change at 32). So even when short circuit appeared should burn this 32A fuse. With this 40A Sitop parallel are connected two more but 20A.. Someone have idea why 20A are burned 6A are switch off and 40A Sitop is burned for the second times? Pleas check the attachment With regards, makaveli Attachment BurnedThings.jpg (313 Downloads)
makaveli Posts: 259 Rating: (5)
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5/25/2011 10:16 AM	Rate (0)
umencho Diamond Member Joined: 3/21/2006 Last visit: 1/14/2025 Posts: 10239 Rating: (1182)	Look at attachment. Reaction of the fuses are much higher then automatic breaker. Even if one of the fuses are burned the breaker wouldn't react. In your case it reacted after the SITOP burned (because most probably is worked on 2 phase). This is my theory. Or bad luck with SITOP, don't think but is possible. Best regards, Hristo Mihalev Attachment BurnedThings[1].jpg (225 Downloads)

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5/26/2011 9:42 AM	Rate (0)
makaveli Posts: 259 Rating: (5)	Hi, Maybe you have right. What is the time reaction of automatic breaker and normal fuse? More or less.. of course. With regards, makaveli
makaveli Posts: 259 Rating: (5)
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5/26/2011 9:50 AM	Rate (0)
umencho Diamond Member Joined: 3/21/2006 Last visit: 1/14/2025 Posts: 10239 Rating: (1182)	Hello again, Basically reaction of the fuses are in ms, circuit breaker are even in s. Just check in their specifications. In fuses important is the letters GR or GG. They "bring" the time of reaction in case of overload... Best regards, Hristo Mihalev

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5/26/2011 12:03 PM	Rate (0)
makaveli Posts: 259 Rating: (5)	Hi, I cannot find time of reactions of Sirius 3RV1011-1GA10..... With regards, makaveli
makaveli Posts: 259 Rating: (5)
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5/26/2011 12:46 PM	Rate (0)
umencho Diamond Member Joined: 3/21/2006 Last visit: 1/14/2025 Posts: 10239 Rating: (1182)	3RV1011-1GA10 CIRCUIT-BREAKER SIZE S00, FOR MOTOR PROTECTION, CLASS 10, A-REL. 4.5...6.3A, N-REL. 82A SCREW TERMINAL, STANDARD SWITCHING CAPACITY Checkits the tripping characteristic from http://support.automation.siemens.com/WW/view/en/27865747(on 119th page). Best regards, Hristo Mihalev

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