Power cutoff for Winch

[Jad4275]

Where does warn recommend this?

They didn’t and still do not but apparently the sillly raven thinks he knows better than the manufacturer. I love when individuals don’t know when to stop making themselves look foolish.

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[Zandcwhite]

They didn’t and still do not but apparently the sillly raven thinks he knows better than the manufacturer. I love when individuals don’t know when to stop making themselves look foolish.

I mean we are still waiting for the redesigned tub and factory 37s he had inside information about and saw with his own eyes in 2022...

 

[Jad4275]

I mean we are still waiting for the redesigned tub and factory 37s he had inside information about and saw with his own eyes in 2022...

It’s coming, just you wait!

 

[TheRaven]

The chart is very clear, I don't know why it's hard to comprehend. Instantaneous trip requires >400% of the rated current period. That works on a circuit breaker in a panel as the available fault current is usually well into the thousands of Amps. It works on a vehicles fuses up to ~150A. Beyond d that and you don't have 400% fault current available. That's how overcurrent protection works. Even to trip in a full second you need 300%. Your available fault current is only ~165% of that 400A fuse. IT WONT TRIP FOR MINUTES.

That's not what "instantaneous trip" means.

 

[GATORB8]

That's not what "instantaneous trip" means.

This is the chart Zach is referencing (this is the one for the Blue Sea Systems MRBF I use):

 

[TheRaven]

They didn’t and still do not but apparently the sillly raven thinks he knows better than the manufacturer. I love when individuals don’t know when to stop making themselves look foolish.

Or like when individuals can't hang in the conversation so they resort to personal jabs to get attention? Grow up...or go play with the other children. There are plenty of them on this forum.

 

[Jad4275]

Or like when individuals can't hang in the conversation so they resort to personal jabs to get attention? Grow up...or go play with the other children. There are plenty of them on this forum.

Who can’t hang? I just know when it’s not worth my time replying to those that cannot comprehend manufacturers illustrations and written direction. If you think you’re the smartest person in the room, you are in the wrong room.

 

[TheRaven]

Who can’t hang? I just know when it’s not worth my time replying to those that cannot comprehend manufacturers illustrations and written direction. If you think you’re the smartest person in the room, you are in the wrong room.

I NEVER think i'm the smartest person in the room. The thing is that the smartest people in THIS room aren't in the conversation...they're smart enough to not get involved. Also - the least smart are the ones who stand on the sideline yelling personal jabs at those in the conversation...so don't put yourself in that group.

 

[GATORB8]

I NEVER think i'm the smartest person in the room. The thing is that the smartest people in THIS room aren't in the conversation...they're smart enough to not get involved. Also - the least smart are the ones who stand on the sideline yelling personal jabs at those in the conversation...so don't put yourself in that group.

Damn Educational Elites hoarding all their knowledge.

 

[Zandcwhite]

I know. He's confusing "instantaneous trip" with the current ramp that I was referencing. Two different things. However these curves do illustrate what I was attempting to explain to him - how circuit interrupters are tripped by heat, not current alone. Thus, a slow ramp of current will be tolerated by the protection device for far longer than a fast ramp.



Wow...that's dark.

The amperage generates the heat. You're slightly correct, look at the right side of the graph. Most fuses will hold 150% of there rating almost indefinitely. The part you don't seem to understand or simply won't acknowledge is your source even in a dead short isn't capable of the 300%-500% necessary to pop a 400A fuse in under a second. The left part of the chart basically doesn't exist when discussing winch fusing... which is why nobody who knows what they are talking about recommends fusing the winch in the first place.

 

[GATORB8]

The amperage generates the heat. You're slightly correct, look at the right side of the graph. Most fuses will hold 150% of there rating almost indefinitely. The part you don't seem to understand or simply won't acknowledge is your source even in a dead short isn't capable of the 300%-500% necessary to pop a 400A fuse in under a second. The left part of the chart basically doesn't exist when discussing winch fusing... which is why nobody who knows what they are talking about recommends fusing the winch in the first place.

Okay, here's my take on the last ten pages.

I'm probably a dumb-dumb for fusing mine because it likely won't blow fast enough, but doesn't hurt anything.

A power interrupt solenoid is a safer bet than nothing for those who are specifically averse to the emergency room. Manufacturers don't specifically recommend them as far as anyone has found in writing, so you are safe from the mattress tag police if you are not running one.

I relearned that CCA is the most a battery can output, I'm pretty sure Zach has taught me this before, but I drink too much and forgot.

 

[Mguy]

Not surprised the partisans are still at it.

May be of interest to some, that in the marine world a major equipment safety sanctioning body requires physically close over-current protection on all non-grounded cables to 800 CCA and up battery sources, basically excepting only starting motors and some alternators. The focus of these marine safety rules is generally protecting the cabling, not the device. Google ABYC E-11 with additional search terms when bored with this thread.

 

[Zandcwhite]

Okay, here's my take on the last ten pages.

I'm probably a dumb-dumb for fusing mine because it likely won't blow fast enough, but doesn't hurt anything.

A power interrupt solenoid is a safer bet than nothing for those who are specifically averse to the emergency room. Manufacturers don't specifically recommend them as far as anyone has found in writing, so you are safe from the mattress tag police if you are not running one.

I relearned that CCA is the most a battery can output, I'm pretty sure Zach has taught me this before, but I drink too much and forgot.

I've been known to drink while welding on the trail using a couple batteries in series... you know an intentional short that's unfused. Even there 1 battery just doesn't have the output to sufficiently melt welding rods.

 

[Zandcwhite]

Not surprised the partisans are still at it.

May be of interest to some, that in the marine world a major equipment safety sanctioning body requires physically close over-current protection on all non-grounded cables to 800 CCA and up battery sources, basically excepting only starting motors and some alternators. The focus of these marine safety rules is generally protecting the cabling, not the device. Google ABYC E-11 with additional search terms when bored with this thread.

Even if my Jeep was a boat... the 660 CCA puts it well below the 800 CCA and up battery sources. It's almost like they even realize the available fault current from batteries smaller than that isn't sufficient for main over-current protection to be functional.

 

[GATORB8]

Even if my Jeep was a boat... the 660 CCA puts it well below the 800 CCA and up battery sources. It's almost like they even realize the available fault current from batteries smaller than that isn't sufficient for main over-current protection to be functional.

The exclusion of the starter motor is probably the most apples to apples comparison, also. The only device getting anywhere near the amperage of a winch.

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