learning101
Always learning
- Location
- Arizona
- Occupation
- Electrician
I've researched for hours how to design this circuit but I certainly need help.
BACKSTORY
Residential community has a community center with three separate bodies of water---main pool, wading pool, and spa. Sub-panel service is 120/240v. Equipment, for reference, are (4) separate pump motors with (1) emergency shut off switch. Motors identified below:
Main Pool Filter Motor - 2.0 HP, 208-230v, 60Hz 1PH kW, 11.0-10.2 MaxAmps (30A/2P breaker)
Wading Pool Filter Motor - 1.5 HP, 208-230V, 60Hz 1PH kW, 9.6-8.8 MaxAmps (20A/2P breaker)
Spa Filter Motor - 2.0 HP, 208-230v, 60Hz 1PH kW, 11.0-10.2 MaxAmps (20A/2P breaker)
Spa Booster Motor - 3.0 HP, 208-230V, 60Hz 1PH, 14.6-12.7 MaxAmps (20A/2P breaker)
Disconnects for each motor are DPST switches.
Exterior mounted emergency stop switch (DPST) shuts off the main pool motor but not other motors. From my understanding, I'm not a pool guy, it's one emergency stop per body of water, at a minimum; in this case, there's only one e-stop switch.
SCOPE
Community manager would like to have all (4) motors/pumps shut down if the emergency switch is engaged so they don't have to install separate switches for each body of water. They want to remove the e-stop switch and replace it with a push/pull button. And to be with code, an audible alarm is to be installed.
PROPOSED SOLUTION
Install (1) contactor with an integrated relay for each motor that would be triggered by the e-stop button and open the contacts to an audible alarm.
The proposed solution is one that I came up with and I think would solve the problem. But I cannot figure out the controlling portion. I know the coil has to get energized for the contacts to pull in. I can get that done by wiring one set of contacts on the relay NC but then I second-guess myself.
For those whom are much smarter than myself, can someone help me out? Give some guidance on how to complete the wiring?
Below is a link to a dropbox folder. In the folder, the two PDFs are what I started with the circuit design.
Circuit Design & Photos
BACKSTORY
Residential community has a community center with three separate bodies of water---main pool, wading pool, and spa. Sub-panel service is 120/240v. Equipment, for reference, are (4) separate pump motors with (1) emergency shut off switch. Motors identified below:
Main Pool Filter Motor - 2.0 HP, 208-230v, 60Hz 1PH kW, 11.0-10.2 MaxAmps (30A/2P breaker)
Wading Pool Filter Motor - 1.5 HP, 208-230V, 60Hz 1PH kW, 9.6-8.8 MaxAmps (20A/2P breaker)
Spa Filter Motor - 2.0 HP, 208-230v, 60Hz 1PH kW, 11.0-10.2 MaxAmps (20A/2P breaker)
Spa Booster Motor - 3.0 HP, 208-230V, 60Hz 1PH, 14.6-12.7 MaxAmps (20A/2P breaker)
Disconnects for each motor are DPST switches.
Exterior mounted emergency stop switch (DPST) shuts off the main pool motor but not other motors. From my understanding, I'm not a pool guy, it's one emergency stop per body of water, at a minimum; in this case, there's only one e-stop switch.
SCOPE
Community manager would like to have all (4) motors/pumps shut down if the emergency switch is engaged so they don't have to install separate switches for each body of water. They want to remove the e-stop switch and replace it with a push/pull button. And to be with code, an audible alarm is to be installed.
PROPOSED SOLUTION
Install (1) contactor with an integrated relay for each motor that would be triggered by the e-stop button and open the contacts to an audible alarm.
The proposed solution is one that I came up with and I think would solve the problem. But I cannot figure out the controlling portion. I know the coil has to get energized for the contacts to pull in. I can get that done by wiring one set of contacts on the relay NC but then I second-guess myself.
For those whom are much smarter than myself, can someone help me out? Give some guidance on how to complete the wiring?
Below is a link to a dropbox folder. In the folder, the two PDFs are what I started with the circuit design.
Circuit Design & Photos
