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| 2/25/2009 8:21 PM | |
Joined: 5/28/2008 Last visit: 11/6/2024 Posts: 4516 Rating:
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Hello, First of all, I think you are talking about MCCBs " Molded Case Circuit Breakers" and not the MCBs "Minature Circuit Breakers". Normally MCCBs have 3 position for its toggle handle. ON, OFF and Tripped. As per the attached picture you can see it clearlly. Normally, The handle goes to Tripped position when an overload is applied, short circuit, or when testing tripping function by pressing the smalltrip button.Also it goes to trip position when energizing the shunt relese.In this cases, you have to move the handle to OFF position before moving again to ON. Here's also a link for 3VL MCCB. and I think it would be very useful for you. http://support.automation.siemens.com/WW/view/en/19612445 With best regards, |
Last edited by: Ayman Elotaify at: 2/26/2009 7:36 AMAyman Elotaify |
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| 3/3/2009 11:42 AM | |
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Posts: 467 Rating:
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Hello dealova, such a behaviour is not known at the Siemens quality department. I cannot give an answer without knowing more about the devices Do you have more informations about the MCBs? - how old - order no. - delivery country - environment You also can contactour TechnicalSupport: mailto: technical-assistance@siemens.com regards |
| 3/6/2009 5:07 PM | |
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Posts: 5 Rating:
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That happens with the older ('80) and the newer ('90) MCBs in 2 different places, high humidity. |
| 3/6/2009 5:11 PM | |
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Posts: 5 Rating:
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pic 2 |
| 3/6/2009 5:13 PM | |
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Posts: 5 Rating:
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pic 3 |
| 6/4/2009 1:25 PM | |
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Posts: 148 Rating:
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DDear Dealova, I think it is time to replace all these units. |
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