Controlling line power with a 6V circuit using a relay.

Click For Summary

Discussion Overview

The discussion centers around the need for a relay that operates with a 6V circuit while controlling a line power switch capable of handling 120 volts at approximately 12A. Participants explore various relay types and configurations to achieve the desired functionality, including the possibility of using a normally closed (NC) relay.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks a relay that operates at 6V and disconnects the connector when powered, suggesting a specific configuration that may not be readily available.
  • Another participant mentions that many relays have normally open (NO) and normally closed (NC) contacts, indicating that a NC solid state relay might be suitable.
  • Some participants argue that a single pole double throw (SPDT) relay could meet the requirements, questioning the original poster's concerns about its functionality.
  • A participant expresses confusion about using an SPDT relay with two independent circuits, suggesting that a double pole double throw (DPDT) relay might be more appropriate for that scenario.
  • There is a suggestion that providing more detailed information, such as circuit diagrams, would help in receiving more accurate advice.

Areas of Agreement / Disagreement

Participants express differing opinions on the suitability of SPDT relays for the original poster's needs, with some asserting it could work while others suggest alternative relay types. The discussion remains unresolved regarding the best approach to control the line power switch.

Contextual Notes

Participants have not fully clarified the specific requirements or constraints of the circuit, and there are unresolved questions about the integration of multiple circuits with different relay types.

fabiobollinge
Messages
6
Reaction score
0
I need a sort of relay which takes only about 6V in the electromagnet, but can handle line current in the connector? It would also be preferable, not necessary, that it's inverted, so when there is power to the coil, the connector is disconnected, and when no power is in the coil, the connector is connected and 120 volts at roughly 12A flows through.

The only thing I found for this was a SPDT relay, which does not function as I would like.

Does such a thing exist? If not, what can I do to control a line power switch with a 6V circuit?
 
Engineering news on Phys.org
Many relays have multiple contacts. They are labeled NO (normally open) and NC (normally closed)

When power is applied the NO contacts will close, the NC contacts will open.

Try looking for a NC solid state relay.
 
SPDT should do what you want. Is there a reason you think it would not?
 
Averagesupernova said:
SPDT should do what you want. Is there a reason you think it would not?

To me it seems like the SPDT only has 3 'legs', and can only be integrated into one circuit? I might be mislead by this, how would I use an SPDT with two independent circuits without having them connect with each other?
 
fabiobollinge said:
...I might be mislead by this, how would I use an SPDT with two independent circuits without having them connect with each other?

Thats information you never gave us at the start ;)

It really helps if you tell us exactly what you are trying to achieve, with circuit diagrams if possible etc.
That way you will get good direct answers to what you are enquiring about :)

OK so get a DPDT relay if you have 2 independent circuits you need to control
and make sure the relay contacts are rated for the voltage and current requirements !

Dave
 

Similar threads

  • · Replies 7 ·
Replies
7
Views
1K
  • · Replies 5 ·
Replies
5
Views
968
Replies
37
Views
7K
  • · Replies 31 ·
2
Replies
31
Views
5K
Replies
12
Views
3K
Replies
8
Views
9K
  • · Replies 15 ·
Replies
15
Views
3K
  • · Replies 25 ·
Replies
25
Views
6K
  • · Replies 13 ·
Replies
13
Views
4K
  • · Replies 9 ·
Replies
9
Views
4K