IET
Decrease font size
Increase font size
Topic Title: DC power networking.
Topic Summary: Unsuitability of existing AC microbreak switches.
Created On: 13 September 2016 02:53 PM
Status: Read Only
Related E&T article: DC's low-voltage invasion
Linear : Threading : Single : Branch
 DC power networking.   - mjrichards - 13 September 2016 02:53 PM  
 DC power networking.   - rogerbryant - 14 September 2016 09:18 AM  
 DC power networking.   - greeny1987 - 30 January 2017 03:44 PM  
Search Topic Search Topic
Topic Tools Topic Tools
View similar topics View similar topics
View topic in raw text format. Print this topic.
 13 September 2016 02:53 PM
User is offline View Users Profile Print this message



mjrichards

Posts: 2
Joined: 18 January 2003

Any re-use of AC wiring for DC would have to allow for the replacement of any existing microbreak switches, which are not able to switch DC at other than low voltages. DC-capable switches are significantly larger, and would possibly not fit existing back boxes. This would significantly affect the economics of any such re-use.
 14 September 2016 09:18 AM
User is offline View Users Profile Print this message



rogerbryant

Posts: 980
Joined: 19 July 2002

There are two opposing problems here related to LV DC.
With lower voltages the switches will be ok to break the circuit but the current carrying capacity of the existing switches and wiring may not be adequate.
With higher voltage the ccc may be ok but the switches will tend to arc.
The question is: What is the maximum voltage that the switches will be able to break?
12V will be ok, 24V is probably ok but above that the problems will start. I was involved in some work on higher voltage electrical systems for automotive use and by the planned 42V standard automotive components were no longer adequate.

Best regards

Roger
 30 January 2017 03:44 PM
User is offline View Users Profile Print this message



greeny1987

Posts: 11
Joined: 05 June 2015

Hi both, would you be able to complete my online survey with regards to LVDC please? Its 9 short questions and will help towards my BEng Dissertation.

https://surveymonkey.com/r/NQGKPYT

Thank You,
Stacey.
Statistics

New here?


See Also:



FuseTalk Standard Edition v3.2 - © 1999-2017 FuseTalk Inc. All rights reserved.


..