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Battery Master Relay (solenoid)

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Battery Master Relay (solenoid)

Postby Cess32cw » Sat Jun 13, 2020 7:17 pm

Pardon my ignorance but I have a question about the battery continuous solenoid. While prepping for my upcoming first flight I noticed that the solenoid is hot to the touch after about 5 minutes of turning on the master switch. None of the surrounding wires or components are warm, only the solenoid which gets very warm/hot. Is this normal? I ordered a new solenoid from ACS and it does the same thing...hot to the touch after about 5 minutes. Any words of wisdom out there?
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Re: Battery Master Relay (solenoid)

Postby Sonex1517 » Sat Jun 13, 2020 9:41 pm

A continuous duty solenoid is intended for exactly that - continuous duty. A starter solenoid is intended for short duration use.

Your master solenoid is typically continuous duty, so if yours is hot check to see what you installed.
Robbie Culver
Sonex 1517
Aero Estates (T25)
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Re: Battery Master Relay (solenoid)

Postby Bryan Cotton » Sun Jun 14, 2020 12:53 am

Most of them draw about an amp. This is at least 12W of power dissipation. That will cause some heat.

Check out this thread:
viewtopic.php?f=6&t=2009
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Waiex 191 N191YX
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