Thermal Disconnect Switch for Bendpak lift

[Chris Davis]

Can someone point me to what type of device I need? The manual says to install a Power Disconnect Switch and a Thermal Disconnect Switch. The power Disconnect Switch seems pretty straightforward. However, I am struggling to find a solution for a 220vac single phase 2.0 HP motor with a FLA listed as 10.5-11.6/21.

Any guidance would be appreciated. Thank you.

Here is an excerpt from the manual.

 

[pattenp]

Grizzly G4572 - Magnetic Switch, Single-Phase, 220V Only, 2 HP - Grizzly Industrial, Inc.

Professional-grade magnetic switches protect against thermal overload and automatically shut down if power is interrupted, so equipment won't start when circuits are turned back on. Single Phase - 220V only. 2 HP, 8.5-12 Amps.

www.grizzly.com

 

[wyliesdiesels]

you need whats called a motor starter. the one pattenp linked to should work as long as the coil doesnt care about the voltage difference

 

[pattenp]

I'm somewhat surprised that thermal overload protection is needed since that motor is not used in a continuous duty use application. My Challenger lift has the identical motor with no internal thermal protection and there is no specified requirement to install a thermal switch shown on the power unit or in the installation manual.
One thing is, overcurrent protection and thermal overload protection are different. Overcurrent is handled by the breaker. So I don't believe that sticker is meaning that thermal overload protection is required to be added, just overcurrent.

 

[wyliesdiesels]

label is hard to read. OP can you please post a better pic of the label

 

[Norcal]

The 220V rating is for 50 Hz.

 

[AntonLargiader]

I read it as:
WARNING
Motor contains no thermal protector
Separate overcurrent protection must be provided to prevent burnout and possible fire hazard from overloaded or stalled motors.
Upturned lug terminal or cupped washer to be used on ground lead under ground screw.

 

[Chris Davis]

label is hard to read. OP can you please post a better pic of the label

Added the description from the manual. Sorry, didn't even notice the warning sticker was not readable.

 

[pattenp]

The instructions are very clear to add thermal overload protection, that said, I cannot recall any lift I've seen having it. My lift sure doesn't call for it. I maybe reading the NEC wrong, but 430.32 only requires overload protection on motors 1hp and greater under continuous use applications. Obviously there's nothing wrong with having it. NEC states to follow manufacturer install requirements.

 

[wyliesdiesels]

The instructions are very clear to add thermal overload protection, that said, I cannot recall any lift I've seen having it. My lift sure doesn't call for it. I maybe reading the NEC wrong, but 430.32 only requires overload protection on motors 1hp and greater under continuous use applications. Obviously there's nothing wrong with having it. NEC states to follow manufacturer install requirements.

Does your lift motor have a red reset button on the bottom?

 

[pbon]

I have not added an overload or emergency stop switch to my HD-9. Maybe when I retire and am looking for things to do.

 

[pattenp]

Does your lift motor have a red reset button on the bottom?

Nope. Motor has warning label in very small print that no thermal protection provided. I checked my install manual and no mention of needing to add it. Electrical requirements only state the needed size of wiring and OCP and a power disconnect.

 

[Chris Davis]

Does your lift motor have a red reset button on the bottom?

No, no reset button.

 

[Chris Davis]

Grizzly G4572 - Magnetic Switch, Single-Phase, 220V Only, 2 HP - Grizzly Industrial, Inc.

Professional-grade magnetic switches protect against thermal overload and automatically shut down if power is interrupted, so equipment won't start when circuits are turned back on. Single Phase - 220V only. 2 HP, 8.5-12 Amps.

www.grizzly.com

Ok, I bought this. Should be here in a week. Looks like exactly what I needed. Thank You!!

 

[wyliesdiesels]

Nope. Motor has warning label in very small print that no thermal protection provided. I checked my install manual and no mention of needing to add it. Electrical requirements only state the needed size of wiring and OCP and a power disconnect.

they mustve forgot to include that info when translating it from chinese to english

 

[pattenp]

they mustve forgot to include that info when translating it from chinese to english

Well actually my lift was made in Kentucky long before Challenger started sending some of the manufacturing off shore. Even the power unit motor shows USA.

 

[wyliesdiesels]

Well actually my lift was made in Kentucky long before Challenger started sending some of the manufacturing off shore. Even the power unit motor shows USA.

interesting.... wonder how theyre getting away with not providing thermal protection

 

[pattenp]

interesting.... wonder how theyre getting away with not providing thermal protection

Does the NEC require thermal protection on a motor that's not used as continuous duty and is not autostart? I was thinking it didn't.
Edit: NEC 430.33 is why my lift motor doesn't require thermal overload protection.

 

[pbon]

interesting.... wonder how theyre getting away with not providing thermal protection

There lawyers said they would not get sued as long as they disclosed in the instructions and recommended installing a switch. Lawyer charged $800 for the advice and Bendpak saved $8000 by not installing switches in 4000 lifts.