Jump to content

Flap Relays


Releew

Recommended Posts

The pictures in this thread show manufacturing defects. The relays are supposed to be vented, but the vent nib has not been broken off after assembly. This can reduce the contact life 20 to 50% according to this app note.

 

https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=13C9136_Venting_Sealed_Relays_AppNote&DocType=CS&DocLang=EN

 

flap_relay_vent2.thumb.jpg.c653f7c81f65be5a914673962f5f5963.jpgflap_relay_vent.jpg.39693937a2230e6d592c4c715e4825ca.jpg

Link to comment
Share on other sites

I wonder if by venting theses relays you introduce a pathway for contamination...tks fluid,oils exaust by products that are corrosive to the contacts.TE also mentions that contact life expectancy is a product of current running thru those contacts.TE indicates venting helps remove ionized byproducts caused by contact arcing...I wonder if these relays held a vacumn what would be their life expectancies 

Link to comment
Share on other sites

1 hour ago, thinwing said:

I wonder if by venting theses relays you introduce a pathway for contamination...tks fluid,oils exaust by products that are corrosive to the contacts.TE also mentions that contact life expectancy is a product of current running thru those contacts.TE indicates venting helps remove ionized byproducts caused by contact arcing...I wonder if these relays held a vacumn what would be their life expectancies 

Arcing increases as pressure decreases since the air is relied on to provide resistance when the contact is open.   This is why pressurized magnetos are used for high-altitude flight.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.