How long can a relay be on?

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88rx7t2

Member - Posts: 1

Joined: March 22, 2003

Posted: April 11, 2003 at 11:59 AM / IP Logged

When you use a relay for a starter kill or Fuel cutoff the relay will be close( not energize) providing current to the fuel pump until the alarm goes of,then it will move to the open position and wont let current pass trough it. So, basicly relay just makes the starter or the fuel pump stop working while the alarm is on if you wire it correctly. You dont have to worry while you driving because it will be at rest.

cpgoose

Gold - Posts: 1,098

Joined: July 08, 2002

Location: United States

Posted: April 11, 2003 at 2:30 PM / IP Logged

Well, I was referring to this page. I thought it would stay on while the car was running, letting the fuel pump supply fuel. Do I have this backwards? That would be cool, because I think this is one of the best setups I've seen.

stanward

Copper - Posts: 57

Joined: April 09, 2003

Location: Hawaii, United States

Posted: April 11, 2003 at 2:43 PM / IP Logged

I believe for an OEM fuel pump relay, the relay is energized when the ignition is turned on. The car will be driven a lot less than when it sits around, etc.

I think that is correct.

Stan

TBmojorisin

Member - Posts: 1

Joined: February 10, 2003

Location: United States

Posted: April 11, 2003 at 9:39 PM / IP Logged

chuckles wrote:

A relay will last for almost ever, as long as the voltage to the coil, electromagnet, is not exceeded. I've put automatic transfer switches in hospitals and gone back 25 years later and they still have the same relays. The relays control the emergency generator and are latched constantly by the power company so when they loose power the relays drop out and start the generators.

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How long can a relay be on?

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