120V Winch motor control-need help

[markdtn]

My parents have a house on a lake. We have a Waverunner in a shed that has a 120V Warn 3000 winch to lower it down a ramp into the water. Right now we have a drum switch to reverse the motor. I would like to not do that anymore to avoid wet people operating the drum switch. I would like to use a 4 pole reversing contactor and have a lanyard with waterproof switches to provide control voltage to the contactor. I can put the contactor and a transformer for control power in a box up high. Motor is 3/4HP 120V, appears to be 20.9A max. It has wires 1,3,8 together and 2,4,5 together to go 1 direction and 1,3,5 and 2,4,8 to go the other (switch 5 and 8). On 1 side of the contactor I can go L1 to 1&3 and L2 to 8 connected to neutral then L3 to 5 and L4 to 2&4 connected to line voltage. Then to reverse I can go L1 to 1&3 and L2 to 5 connected to neutral then L3 to 8 and L4 to 2&4 connected to line voltage. That should reverse it. So my question is on sourcing this contactor. There are so many options. Do any of you have a suggestion on a contactor? Would a Schnieder LC2DT20-B7 work?

 

[rlitman]

If you're installing a contactor, why not just re-use the drum switch for the low voltage control?

Also, do you have GFCI protection on all this? That should be more than sufficient for the safety of the wet users.

As for the reversing contactor, I think that one should work, but I'm sure you could find cheaper options too.

 

[SGKent]

consider calling Warn Customer Service to see if they have a suggestion or remote for that application? Warn Customer Service: 800-543-9276 (Oregon).

 

[markdtn]

There is GFCI on all of this, but you can never be too careful.

I want to get a plastic box on a lanyard with a SPDT momentary toggle to control the contactor. That way I can separate the control voltage from the higher voltage and have a much more water-proof installation.

I have spoken to Warn. They have a drum switch that they sell. They don't really support this application.

I really just wanted some advice from an Electrician on a p/n for a contactor that will work. I'm pretty confident in my control strategy, I can't find enough data on the contactor to be sure I have a large enough one without going completely overboard. I have run through Schneider's site and it seems a LC2DT25B7 maybe instead of the 20 series? Is the 20 enough? These seem to be rated at 3-phase type voltages. The 20 series says it is enough for a 5HP 460V motor. Is it big enough for a 3/4HP 120V? That is what I need someone with experience to answer. Thanks!

PS-I am not stuck on Square-D. Eaton, Cutler Hammer, etc. would all be fine.

 

[grounded-b]

That particular Schneider contactor doesn't seem to have a HP/KW rating for motor applications.

In fact, in the specs, it says it is for resistive loads. I don't really know why they would manufacture a reversing contactor for resistive loads?

Steve

 

[rlitman]

...The 20 series says it is enough for a 5HP 460V motor. Is it big enough for a 3/4HP 120V...

Not necessarily. In this case, you'd need to consult the datasheet.

...In fact, in the specs, it says it is for resistive loads. I don't really know why they would manufacture a reversing contactor for resistive loads?

I see what you mean. That's really weird.

edit, I think this is because the power rating is metric in kW, and not imperial in HP, and something was lost in translation.
Refer to page 5/46 here (LC2 DT20 is in the first column):
https://www.schneider-electric.com/...FAQS/228000/FA228499/ko_KR/CH5 Contactors.pdf
That shows 2.2kW @ 240V, but there's no row for 120V.

 

[markdtn]

I finally just did a chat with Schneider. They say the 20 series will work. Thanks for the advice!

 

[slow]

What is your budget for the project, that contactor is not cheap. For around $400 you can buy a wireless remote setup for boat lifts that may do exactly what you need already in a marine rated enclosure.

http://www.tecremotes.com/products