Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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There running a 3 phase dual output motor on a vibrating screener here at the plant .i found out this weekend that when they installed the motor it would fault out the vfd . they unhooked the ground at the motor an it never faulted out the vfd. so it is still running but from the screen er to a chaise ground it is reading 60 volts an shocking the operators ??????????? i know this is not induced voltage an should not be allowed to run like this. but management makes the calls . what is the technical term for this an could you explaine it to me . before it melts down in the near time

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It sounds like the applicable term is short circut. Something is grounded that shouldn't be. If a person ever makes a good enough ground path the outcome will not be good. It only takes milliamps to stop a persons heart. The motor needs to go to a repair shop before a coroner visits your workplace.

Posted on Feb 03, 2010

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Why does condenser have a dual capacitor and a single capacitor in the same unit?


Hard to say exactly, but most heavy duty electric motors have a start capacitor as well as a run capacitor. There may also be an overload protector you are confusing with a condensor.
Single Phase Hermetic Motors

Jan 11, 2016 | Heating & Cooling

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Single phase or 3 phase


Hmmm. Good question. Like anything, it varies depending on how the equipment is going to be used and in what environment. We could really get into the weeds, but let's just ask the couple of key questions.

1. Is this a commercial or residential environment?
2. What's the horsepower of the motor(s) in use?
3. What's the availability of 3 phase power?

1. If your saw is in daily, commercial use, then 3 phase may offer some distinct advantages: While it's expensive to convert (assuming you don't already have 3 phase available) it allows for smaller, less expensive wiring, and lower voltages making it safer and less expensive to run.

Single phase, otoh, is much more available, and runs motors up to 5hp with little difficulty. It does actually cost more to run a lot of single phase equipment so if cost is an issue and you have quite a few motors, this may be a large determining factor.

2. As I mentioned, if you're only running one or a couple smaller motors, up to 5hp, single phase should work just fine. I have several pieces of machinery with 5 hp motors them on single phase 220 and they perform great. I don't recommend 110vAC for motors under significant load. They run too hot and are not all that efficient, as well as under-powered.

3. Installing a 3 phase electrical system can be very expensive. I would look into this carefully, get a few estimates before moving ahead. You'll need to find out if it's even available, cost of transformers for 110 in the building as well as whether they'll charge you commercial rates for your electricity once it's installed.

There is no simple answer for this question, I fear. There are simply too many factors to consider.

This is the short answer. A simple web inquiry will give you more answers than you actually need.

Good luck.

Jan 02, 2016 | Saws

1 Answer

If the 10 HP motor works harder at 230 v 3 phase than 460v 3 phase would a 15 HP motor at 230 v 3 phase be sufficient I guess what I'm asking is what would work. I only have 230 v 3 phase


For a given power output, generally a higher voltage motor will be slightly more efficient than a lower voltage unit because the lower current will produce less loss due to resistance in the windings and will also have a better power factor as a result. That's why the 230 V motor appears to "work harder" than the 460V equivalent.

If the 15 HP motor is more efficient at the load point than the 10 HP motor, and you will use it enough to justify the expense, it's worth using. If this is an industrial application (running continuously for at least one shift), do investigate the newer motor drive technologies. They can save a considerable amount of money on electricity.

Aug 03, 2015 | Air Tools & Compressors

2 Answers

I have a Ingersoll Rand Compressor model# 2545E10V 10 HP,3 phase and I would like to convert it to a signle phase. would this motor here be good to go with and what other items will be needed to complete...


It might. Mounting holes match? Shaft diameter and adapter match? Power supply sufficient for 5HP motor? It's a big motor! You might get a better answer from the ebay supplier.

Mar 05, 2015 | Ingersoll Rand Air Tools & Compressors

1 Answer

How do I check a " leg " on a 3-phase electric drive motor for a booster pump?


Use a clamp on ammeter to see which leg is not performing correctly.

Aug 18, 2014 | Pool & Spa

1 Answer

I need to run a contactor ( 40 amps 3 phase ) with the help of thermostat..i have connected L1,L2 n L3 and output coneccted in T 1 T2 T3 . now how to connect A1 and A2 .... i want that contactor should...


1) Copy following links for illustrations showing timer controlling contactor in 3-phase environment:
http://waterheatertimer.org/How-to-install-3-phase-timer.html
http://waterheatertimer.org/images/3-phase-timer-diagram-24Vac-865.jpg

2) Substitute thermostat instead of timer for switching control.

3) I don't know what thermostat you have, or if it's functioning or the rating.

4) Which contactor do you have?
Do you have a 3-phase contactor??
Or two-pole single phase contactor?

5) Match thermostat output voltage with contactor voltage:
Thermostat output is 24 volt? Then use 24Volt coil on contactor.
Thermostat output 120 or 277 > then use contactor with same coil rating.

6) More information is needed.
I don't understand description of your wiring.
Add a comment and compare with illustrations sent, so I can visualize ... or attach photo and/or give product numbers so maybe I can locate wiring diagrams.

Jan 31, 2013 | Connecticut Electric Electrical Supplies

2 Answers

What is the best grow lights to grow *********


That depends on what you're trying to grow and what phase the plant is in. Certain plants are adapted to grow in the shade or in warm, sunny environments. Depending on the plant, one type of light may work better than another. For example, if your plant needs a shadier environment, then a regular incandescent bulb may work best.

The other factor that goes into choosing the right grow light is what phase your plant is at. For example, a high-pressure sodium bulb may be best when your plant is in the flowering or fruiting stage.

Personally, I love using LED grow lights. Modern LED bulbs are more energy-efficient (they produce more light with less power), so they cost less in the long run. They also produce less heat, which means you don't have to worry about a ventilation system. Plus, they emit light wavelengths that correspond to the peak absorption peaks for most plants.

When choosing your bulb, you should look at the requirements of the plant and how those requirements change as the plant continues to grow. Keep in mind that the larger your plant gets, the more light it will need, so plan ahead.

Feb 07, 2012 | Jump Start 4' Fluorescent Plant Grow Light...

2 Answers

I need a wiring diagram for the Hobart H600 which has a multi tap motor on and i would like to change the voltage on the motor to 200volt single phase 120/208 or even 120208 3phase. The wiring diagram is...


You cannot wire a three phase motor for single phase and you cannot wire a single phase motor for three phase. If you have a three phase dual voltage motor your options are 220 or 440 volts. If you have a single phase dual voltage motor your options are 120 or 240 volts. A 208 volt Hobart motor will only function correctly on 208 volts and is not dual voltage.

Aug 05, 2010 | Hobart H600 Stand Mixer

1 Answer

How do I wire a three phase electric motor to 110 plug


You can't run a 3-phase motor on 110V unless you use a 3-phase inverter. Depending on the size of your motor, these will probably run you around $150 for the least expensive type. Take a look at--- http://americanrotary.com/static-phase-converters.html

Jul 24, 2010 | Electric 1HP Century Single Phase Extra...

1 Answer

How do I connect multiple (two or more) 3 phase ac power sources (from wind turbine alternators) to a single 3 phase junction to power one device?


what did you mean by single 3 phase? single phase motor have two wire output 110-110, 3 phase gen have 3 wires 110-110-110. if only two wires here ,this is single phase, all appliances are only single phase so you can connect it here, except some 3 phase motor or dynamo. the ac current has no polarity so you can connect to it all kinds of load depends upon the amperage of of your turbine generators

Jul 22, 2010 | Kitchen Ranges

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