28v solenoid operating voltages?

[Sean]

I've just got a solenoid operated toggle switch, rated at 28v DC. Like the yaw damper switch in the seven-three.

Out of curiosity, and because it's the only power supply I had to hand, I rigged it up to 12v DC and was pleasantly surprised to see it works.

Would I be doing any long term damage to either the solenoid or the power supply if I chose to keep this combo?

Sean

[Jetcos]

12V will work, even 24V if you can't find 28V.

[Sean]

Thanks Steve. So there'll be no longer term ill effects? I could get a 24v psu no problem, but running it at 12v is appealing if it'll not do any harm. Unless I need to get 24v for another use. Just off to check Anders start switches!

[Jetcos]

None that we have seen and we use the Solenoid switches in the Yaw Damper position and MCP A/T switch.

[Aerosim Solutions]

You are just energizing an electromagnet, the only effect lower voltage will have is less strength in the magnet. If it still operates the switch ok at 12Vdc you will have no issues at all and it will be perfectly safe!

Cheers Gwyn

[Sean]

Thanks again Steve. And Gwyn.

So if the magnet holds the switch less strong, then it should be easier to manually flick the switch in the opposite direction? Does manually opposing the powered solenoid damage the switch?

Sorry to sound like a right noob, but this is my first experience with solenoids and I couldn't find anything by googling.

Sean

[Nat Crea]

Does manually opposing the powered solenoid damage the switch?

Sean, I use 24V and manually oppose mine occasionally whilst energised without
any drama....stop stressing!

Nat

[Sean]

Lol, thanks Nat, wilco.

Now, I've just discovered that the wing anti-ice also has a solenoid switch, which trips off at lift off. So that's:

Yaw Damper

Voice Recorder

Wing Anti Ice

Any others?

[Nat Crea]

Wing Anti-ice too?
Damn I have no relay outputs left

Nat

[blueskydriver]

Hey Nat,

Which Relay Card are you using?

John

[philb737]

 The correct switch for the Wing Anti-ice is a toggle switch with internal circuit breaker,.... good luck tripping that circuit  The next best solution is the solenoid switch
  http://www.angelfire.com/il2/aphs/sw6.jpg
Cheers
Phil

[Sean]

Do you know why a circuit breaker is used instead of a solenoid switch?

http://www.b737.org.uk/iceandrain.htm#Wing_Anti_Ice

[Nat Crea]

Hey Nat,

Which Relay Card are you using?

Hey John, Phidgets 0/0/4.

Dont worry, I have no time to get that switch powered..XP10 is keeping me busy!;)

Nat