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ICM491 Single Phase Motor Protection, 95-270 VAC
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ICM491 has been discontinued
Discontinued September 26, 2019
This product was discontinued because the part number was changed by the manufacturer. No modifications were made to the replacement product.
MANUALS (3)
This item replaces:Â P251-0092-B
Direct Replacement:
ICM492D Single Phase Motor Protection, 80-300 VAC
Product Highlights
–
95/270 VAC
Description
–
Mode of Operation - Designed in a small, easy-to-mount case, the ICM491 continuously monitors incoming line voltage for errors. When line power is appropriate, the ICM491 closes a set of N.O. contacts and lights a green LED. When incoming power is outside of user selected parameters, the N.C. contacts will close and a red LED will illuminate, indicating current fault conditions. This unit also interrogates the line during fault conditions to reduce nuisance trips from transients or compressor start ups.
Features
Features
- Low cost single phase motor protection
- Built in anti-short cycle protection
- Detects high/low voltage conditions
- Helps prevent rapid system recycling
- LED indicators:
- Green for normal conditions
- Red for fault
- Heavy duty SPDT, isolated relay output
- Interrogation delay prevents nuisance trips: 5 seconds
Specs
–
| Voltage: | 95/270 VAC |
|---|---|
| Output: | SPDT (relay) 5 amps (NC/NO) |
| Time Delay: | 6-600 seconds (adjustable) |
| Dimensions: | 3.25" x 3" x 1.25" |
Questions?
Speak with a real person who will go out of the way to help!
Call or text 888-757-4774
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Friday
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Saturday – Sunday
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Product Reviews
4.1 out of 10Â reviews
70% would recommend this product
5 star
70%
4 star
10%
3 star
0%
2 star
0%
1 star
20%
Most Liked Positive Review
Good product, works as intended
I used this device to monitor power from a portable generator feeding a manual transfer switch in a residential application. Control circuit is connected to a contactor that disconnects load from generator if over/under voltage occurs. It would be nice if the anti-short cyle delay was adjustable, but device is a great value compared to fully adjustable industrial relays costing 3 times the price.
VS
Most Liked Negative Review
The new ICM491 has the same problem
The original undervoltage product was switching back and forth turning off the compressor. I would switch between the NO and NC contact to get the compressor running again. I purchased a new ICM491 Single Phase Motor Protection, 95-270 VAC and installed it exactly as the original product was wired. It was doing exactly the same thing the previous one was doing.
Showing 1-10 of 10 reviews
Needed for A/C electric blips
Great service, unknown operation of the unit, we haven't had any electrical blips while A/C was in operation. Feel confident.
Thanks!
CG
SWFL
5 years ago
Verified Buyer
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Yes, I would buy this product again
We use this to moniter the power to our house in a foreign country
sherry
Sedro Woolley, WA
8 years ago
Verified Buyer
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Tired of racing for the breaker when lights are dim.
Bought 2, 1 for each side of120v inputs to sense and control Grid-switch . No power is much better than low power as that creates smoke in my motors.
Not hooked it in yet to my service .
Still in the schematic design stage.
Wizbang !
Stillwater ,New York
10 years ago
Verified Buyer
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Second failure
I ordered two of these ICM491C controls, one for each AC system. One of them failed within a month. Supply House accepted return and replaced it. That was 18 months ago and the replacement has failed. Now out of warranty. I'll look for some other brand.
Gary
Cape Coral, FL
11 years ago
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Works as advertised
Using to protect Air Conditioner compressor from rapid restarts due to line voltage drop outs.
Bob
Jeffersonville, IN
11 years ago
Verified Buyer
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Simple and effective
I installed two of these voltage monitors on my central air conditioning systems. I was warned about low voltage causing damage, and I did have two motor failures prior to installing the monitors. Too soon to have a very long track record, but they are very straightforward to install.
I did have a problem with one monitor, but Supp;ly House solved the problem completely, promptly, with no arguments. Surely would buty from them again.
Gary
Cape Coral, Fl
12 years ago
Verified Buyer
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IMC491
Works as stated and the price is reasonable.
Cisco
Friedensburg, PA
13 years ago
Verified Buyer
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delivered on time as ordered
i did alot of shopping and pex was the best price available and their response and delivery was fantastic.
bill
san diego ca.
13 years ago
Verified Buyer
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The new ICM491 has the same problem
The original undervoltage product was switching back and forth turning off the compressor. I would switch between the NO and NC contact to get the compressor running again. I purchased a new ICM491 Single Phase Motor Protection, 95-270 VAC and installed it exactly as the original product was wired. It was doing exactly the same thing the previous one was doing.
Larry the fustrated homeowner
Hanover Park, IL
13 years ago
Verified Buyer
Was this review helpful to you?
Good product, works as intended
I used this device to monitor power from a portable generator feeding a manual transfer switch in a residential application. Control circuit is connected to a contactor that disconnects load from generator if over/under voltage occurs. It would be nice if the anti-short cyle delay was adjustable, but device is a great value compared to fully adjustable industrial relays costing 3 times the price.
Tinkerer55
Central Texas
16 years ago
Verified Buyer
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