Switches or Jumpers or Relays? - Page 1
Forum section: electronics / projects

author: Gowda1
author_rank: Contributor
timestamp: December 14, 2020, 01:48:37 pm
content: Hey,I have already asked this question but again I am asking it with a clear view. As u can see in the diagram attached I need to divert power coming from inverter. I want to maintain the power flow either through the short circuit line or through inductor using switch, Relay or jumpers.I have thought about doing it with switch but then I thought It is difficult to find out the switch with this rated current.(Good thing is I do not switch when the system is working)When I looked about the jumpers I could not find it with higher rating. I found some power connecters but I am not sure how to use it.But jumpers seem cost effective and also consume less space.I found many relays which is rated for my application but the size are very big. I think I have to use min of 800V rating Relay just to be on safer side because of the voltage spike.Please suggest out of 3, which way is best suitable for this application. U can suggest any other ways like any connectors which would do the job with less losses. Thank you

author: Digorion
author_rank: Contributor
timestamp: December 14, 2020, 04:51:38 pm
content: Hello!Since it is 400v 40a, I suppose you need to put something likehttps://www.se.com/ww/en/search/EZ9S16140an inexpensive but reliable option for manual switching. 12 pcs. (2 pcs. per section), its about 100-120$This one only up to 230v, but you can find for a higher voltages. Perhaps there are other devices that can be used based on the specific switching conditions (i.e. how exactly do you want to switch it - at the same time, each separately or something else). Explore the catalogs of manufacturers of such things (Legrand, Schneider Electric, ABB, etc.). Also, contactors may work, but this is an order of magnitude more expensive.

author: themadhippy
author_rank: Super Contributor
timestamp: December 14, 2020, 05:21:02 pm
content: how about 2 output sockets,1 fed direct and the other via the inductors,plug into the desired option

author: Simon
author_rank: Unknown
timestamp: December 14, 2020, 07:16:48 pm
content: Quote from: Gowda1 on December 14, 2020, 01:48:37 pmThen just carry on with your previous thread, people prefer one long thread rather than several.

author: bdunham7
author_rank: Super Contributor
timestamp: December 14, 2020, 07:33:51 pm
content: These are generally used for battery systems, but they meet your current and voltage specs. They're still not small.https://powerwerx.azureedge.net/productattachments/ds-sb50.pdf

author: Gowda1
author_rank: Contributor
timestamp: December 15, 2020, 01:43:56 pm
content: I am thinking to use Relayhttps://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=T9G_1216&DocType=DS&DocLang=English.Here I think it can hold 40A rms current since we are not doing live switching. Also I am going to connect it in series to increase the switching voltage. I am now only concerned about the voltage rating of the contacts i.e. if i use SPDT, the ability to withstand the voltage across the pin when it is open (Not to melt the other side of the contact). Please let me know if this suits my application and how to calculate the current carrying capacity of relay.

author: mag_therm
author_rank: Frequent Contributor
timestamp: December 15, 2020, 03:17:50 pm
content: Quote from: Gowda1 on December 15, 2020, 01:43:56 pmIs this still 85 kHz like the other thread? Is it hobby or professional query?I could not access your link. As you know components ( esp switch, protection etc) should be used within the standards they are made for and in accordance with manufacturers spec,You could contact this company in Germany:www.homa-ob.deI don't think they make switches small enough for your application, but they may be able to point you to a source.No affiliation, I have used their switches occasionally over the years. They are rated for use on output of inverters and they are good.Actually I think your query is relevant with the increasing use of kW rated inverters for various applications.

author: Gowda1
author_rank: Contributor
timestamp: December 16, 2020, 10:49:19 am
content: Hey Guys,I found another way of diverting the power without using relays or switches or jumpers.I am thinking of using Anderson powerpoles which is shown in the diagram.It has a rating upto 150A and I just connect using this before i turn on the circuit.Please let me know if this works for my concern.if it works what care i should be taken to work safely.Thank you

author: S. Petrukhin
author_rank: Super Contributor
timestamp: December 20, 2020, 12:58:44 am
content: Look here:https://www.we-online.com/katalog/en/em/redcube_terminals/redcube_plug