Is a door interlocked disconnect always mandatory?
My customer is requesting a control panel that aligns with UL508 guidelines but they do not want a door interlocked disconnect like I specified.
The panel will have 480V 3PH coming in. Total amperage is going to be around 10A. The control panel will only include a 24VDC power supply (to supply power to a remote HMI), some estop circuitry (including a contactor to drop out the 3PH), and overcurrent protection for a remote mounted VFD & Motor.
The control panel is going on a carousel they build. With where they want to mount the panel, they are limited to around 6" in depth because moving parts of the carousel come past the control panel.
So they would like me to figure out some other way other than having a disconnect handle stick out from the front and possibly get knocked off.
1. Do you have any recommendations on other disconnect/door interlock options that would not require a handle mounted on the front. Lever style disconnect enclosures, in my experience, are much larger than what we are looking for here.
2. They would like me to say we can mount the disconnect on the side of the enclosure, but, according to my understanding of the UL508A rules, that would be a violation. Is that correct?
I look forward to your input.
My customer is requesting a control panel that aligns with UL508 guidelines but they do not want a door interlocked disconnect like I specified.
The panel will have 480V 3PH coming in. Total amperage is going to be around 10A. The control panel will only include a 24VDC power supply (to supply power to a remote HMI), some estop circuitry (including a contactor to drop out the 3PH), and overcurrent protection for a remote mounted VFD & Motor.
The control panel is going on a carousel they build. With where they want to mount the panel, they are limited to around 6" in depth because moving parts of the carousel come past the control panel.
So they would like me to figure out some other way other than having a disconnect handle stick out from the front and possibly get knocked off.
1. Do you have any recommendations on other disconnect/door interlock options that would not require a handle mounted on the front. Lever style disconnect enclosures, in my experience, are much larger than what we are looking for here.
2. They would like me to say we can mount the disconnect on the side of the enclosure, but, according to my understanding of the UL508A rules, that would be a violation. Is that correct?
I look forward to your input.