Ice Cube

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chris kennedy

chris kennedy

Senior Member
Location
Miami Fla.
Occupation
60 yr old tool twisting electrician
Should I read continuity through the control contacts of an ice cube as I would through the coil of a contactor?

Thanks
 
cadpoint

cadpoint

Senior Member
Location
Durham, NC
I'd say it depends on the controller. Note the directional throws in the lower contact, I found it using "diagram 700-ha32a1" which came up twice in the same search for "Diagram Electric ice cube" - control4.jpg
 
StephenSDH

StephenSDH

Senior Member
Location
Allentown, PA
You should read a resistance value of the coil. Say 500 ohms.

The NO contacts should read open when not energized, and approx 0 ohms when energized.

The NC contacts should read approx 0 ohms when not energized, and open when energized.

If you have an SCR instead of a standard relay you will likely see some large kohm value when deenergized.

I am not sure if this is what you are asking.
 
kwired

kwired

Electron manager
Location
NE Nebraska
If it is an electromagnetic relay, it is simply a smaller version of the contactor you were comparing to in the OP. If it is a solid state device it will depend on how it is designed, and could have continuity one way, reverse your meter leads and it may not have continuity.
 
G

gar

Senior Member
Location
Ann Arbor, Michigan
Occupation
EE
101109-2114 EST

chris:

Please define what is your Ice Cube, mfg and part number.

If it is like a Potter & Brumfield KUP 11 D15 24 V DC, then it has a transparent cover, and looking thru the side you will see the coil. The wires from the coil go to terminals A and B. This is a DPDT relay with break before make contacts. One set of contacts is labeled 1, 4, and 7. Pin 7 is one common pole that switches between pin 1 and pin 4. Pin 1 to 7 is the normally closed set and 4 to 7 is the normally open set. All this you can see looking thru the side. A sample 24 V DC unit has a coil resistance of 467 ohms. This is non-latching and requires continuous coil excitation to keep the NO contacts closed. Pull-in is about 17 V and drop-out about 5 V.

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