6/26/2013 11:42 AM | |
Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707) |
Hi PISCEAN 2010, |
6/26/2013 12:07 PM | |
Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877) |
Hello, Thanks for your attention. No presently we use 3VU series. |
6/26/2013 4:19 PM | |
Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707) |
Hi PISCEAN 2010, case of control-power transformers with low inrush currents, such as control transformers from Siemens. 3RV1 motor starter protectors for motor protection can be used in this case. |
6/27/2013 10:23 AM | |
Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877) |
Ok. No problem |
This contribution was helpful to1 thankful Users |
7/1/2013 8:41 PM | |
Joined: 7/8/2009 Last visit: 8/5/2024 Posts: 1976 Rating: (477) |
Contactor and relay for overload protection?? How? Anyways, I want to share something here We were having one problem of GMU breakage in one of the Application. We were having 4 GMU with similar rating and application and in 3-4 months we had breakdown in couple of them So we decided MPCB settings to be adjust at low level. Motor rated was 20A but we adjusted MPCB at 16A but still we had 2 more breakdowns Then we installed Drive for it(MM440) and trip setting done as discussed in PARAMETER SETTINGS TO TRIP MM440 ON OVERCURRENT for 16A 0.7sec and till then for 2 years we don't have any GMU breakage What I am trying to say is, MPCB didn't protected ourGMU because it takes time even if current goes to 16A. It will trip as per its thermal curve and if I want limit neck to neck, I must use very low rating MPCB and by doing so, it will trip on Starting or stopping current pick This issue is something similar which discussed here, although application is different. PISCEAN 2010, please make sure for how much time overload is allowed, because MPCB will take some time to trip depending upon how much current is going. For instant trip, you have to look for other options too Regards, Devesh Vithani |
Last edited by: Vithani at: 7/1/2013 8:41 PMI dont Like people driving Fast, thats the reason I overtake them ;) |
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This contribution was helpful to1 thankful Users |
7/2/2013 8:40 AM | |
Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877) |
Hello, Does any one have idea about 3VU & 3RV MPCB s/c breaking capacity? |
7/2/2013 10:31 AM | |
Joined: 7/8/2009 Last visit: 8/5/2024 Posts: 1976 Rating: (477) |
I think it should be with you in catalog |
Last edited by: Vithani at: 7/2/2013 10:34 AMcatalog link added I dont Like people driving Fast, thats the reason I overtake them ;) |
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7/2/2013 10:42 AM | |
Posts: 262 Rating: (45) |
HI, Hope the below reply will help you:- for 3VU (@415Volt- AC Supply) The breaking capacity of 3VU13 is 100kA upto 6A. However for 3VU circuit breakers with rated current of 8A and 10A the short-circuit breaking capacity is 10kA. For circuit breakers with rated current from 16A to 25A the short-circuit breaking capacity is 6kA. In order to enhance the breaking capacity to 50kA, for these ratings (8A to 25A), the current limiter can be used. Thus the need of back up fuses is obviated. For 3RV @ 400V- AC 1) 3RV20: 20/ 55/ 100 (KA) ... upto 40A 2) 3RV21: 55/ 100 KA... upto 32A 3) 3RV23: 20/55/100 KA.... upto 40A 4) 3RV24: 55/100 KA....... upto 25A 5) 3RV10, 11, 13: 50/ 100KA...... upto100A 6) 3RV10 63& 3RV10 73: 120KA 7) 3RV1364 & 3RV1374: 200KA Please refer the attachment for complete details about 3RV AttachmentMPCB1.pdf (534 Downloads) |
This contribution was helpful to1 thankful Users |
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