Ansul system

Merry Christmas
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Can anyone point me in the right direction of what type of relay to use

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nickelec said:
Does anyone have experience with shutting down Electric ranges with a contactor, I have an asil system with this micro switch that needs to shut down two stoves 277-40 amps//cloud.tapatalk.com/s/5c7597bd31645/K-87-024_screen (1).pdf

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If your screen shot of the micro switch is accurate, you don't have an "Ansul" system. You have a Kidde WHDR with a KRS-50 or, possibly, an XV control box. If you really do have an Ansul system, you can't use the micro switch you show. Wet chemical system parts are not interchangeable among manufacturers.
 
hbiss said:
Kind of strange to find a range that uses 277 no? Usually 208, 240 or 480 single or 3 phase.

-Hal
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277 is the limit for the switch. Is the OP crunching to much information into his description?
 
Many call any fire-suppression system an Ansul system, but it is a brand name.

Nick, do you need help with the overall wiring diagram?
 
LarryFine said:
Many call any fire-suppression system an Ansul system, but it is a brand name.

Nick, do you need help with the overall wiring diagram?
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I agree and it's most likely the case here as well I think I'm ok with the wiring but if you care to show I'll indulge

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Use a shunt trip breaker controlled by the micro switch, or through a cube relay if you have multiple shunt trip breakers you need to control.


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nickelec said:
I agree and it's most likely the case here as well I think I'm ok with the wiring but if you care to show I'll indulge
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Here's a diagram I made years ago. The intake and exhaust can be 120v motors or contactors. Every microswitch I've checked is rated at or above 20a.

The wiring can be modified for separate intake and exhaust switches, common or separate circuits, etc. I became a self-proclaimed expert at wiring existing systems that required up\dating to comply with newer rules.


25125d1257999775-ansul-system-wiring-ansul-system-wiring.jpg
 
midamericairon said:
Use a shunt trip breaker controlled by the micro switch, or through a cube relay if you have multiple shunt trip breakers you need to control.
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One caveat about shunt-trip breakers: some cannot withstand continuous voltage, and thus should be supplied from one of the so-equipped circuits.
 
midamericairon said:
Use a shunt trip breaker controlled by the micro switch, or through a cube relay if you have multiple shunt trip breakers you need to control.
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Also an excellent idea because you don't have contactor coils energized continuously.

LarryFine said:
One caveat about shunt-trip breakers: some cannot withstand continuous voltage, and thus should be supplied from one of the so-equipped circuits.
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Something that should be kept in mind if you go that route.

-Hal
 
LarryFine said:
One caveat about shunt-trip breakers: some cannot withstand continuous voltage, and thus should be supplied from one of the so-equipped circuits.
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I'm not sure I understand that. When the contact closes to activate the shunt coil, once the breaker operates it also opens the circuit to the coil, removing the voltage and cutting current flow.
 
LarryFine said:
Here's a diagram I made years ago. The intake and exhaust can be 120v motors or contactors. Every microswitch I've checked is rated at or above 20a.

The wiring can be modified for separate intake and exhaust switches, common or separate circuits, etc. I became a self-proclaimed expert at wiring existing systems that required up\dating to comply with newer rules.


View attachment 22417
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Don't forget that now with the newer codes you need a thermal switch or other automatic means in parallel with the fan switch to make sure the fan is on when the appliances are operating.
 
gadfly56 said:
I'm not sure I understand that. When the contact closes to activate the shunt coil, once the breaker operates it also opens the circuit to the coil, removing the voltage and cutting current flow.
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If you wire it that way so the trip voltage is supplied by the same circuit the breaker interrupts. There are lots of other ways to wire the system though, and the designer has to be aware that whatever is done, in most cases the coil on the shunt trip breaker cannot be continuously energized. It should say so on the breaker.

-Hal
 
hbiss said:
If you wire it that way so the trip voltage is supplied by the same circuit the breaker interrupts. There are lots of other ways to wire the system though, and the designer has to be aware that whatever is done, in most cases the coil on the shunt trip breaker cannot be continuously energized. It should say so on the breaker.

-Hal
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My understanding is the coil is opened internally when the shunt feature is activated. It doesn't matter what the voltage source is.
 
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