I found something out very interesting about these, turns out that while they claim they're rated for up to 305V, the internal relay is only actually rated for 240. I had a defective unit right out of the box so I opened it up to see why. Turns out one of the solder joints for the relay was broken. That's when I saw that the relay it's self was only rated for 240. Needless to say I let the guy in charge of that area know and he's going to the manufacturer to get some answeres.
Been several over the last 5 or so years. We'll go to a lot and repair all the lights and within a month there are several out and it's usually blown PC 's.
Ah they're failing open circuit. Interesting... Those "smart" PCs made by CIMCON Lighting that RIDOT and Providence are using are acting up too. Some of the lights don't work at night. More of a RIDOT problem than Providence though. And some are dayburning. I don't know if the smart PCs can automatically time the PC to come on at sunset and off at sunrise rather than use an actual dusk-to-dawn sensor? Seems like with all the tech like wireless control and remote turn-on/shut-off that it would be easy to program all the lights in the system to come on 20 minutes after sunset or something. Right now they are actually running on sensors though since they all come on at different times but VERY late. Like it's pretty much nighttime before they come on. Around the same as those new Sun-Techs. Maybe even more sensitive. Though there are an odd few that are early risers lol.
Oh yeah they're failing in the open position alright. When I say "blow up" I literally mean just that. The whole unit blows apart. Just walk around the lot and can usually find parts on the ground near the pole. Lol
Holy crap. That's insane! Now by lot, do you mean a parking lot? Or the maintenance lot for your utility? Here in Rhode Island all the utility company street lights have 120V PCs. They used a mix of 120V-only lights and 240V with 120V PC lights. The 240V with 120V PC fixtures were used between 1964 or 1965 and around 1988. Before 1964/65 and from 1989 onward all the lights were 120V. Another utility company had always used 120V lights. The three major utility companies were all bought out by National Grid around 1998-2000. There is one municipal utility in the northwest corner of the state though, which uses all 120V lights. They're going LED now but before LEDs they used OVHs, OVZs, 115s, Durastar 2000s, and lots of 50W HPS NEMA heads.
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That's insane! Now by lot, do you mean a parking lot? Or the maintenance lot for your utility? Here in Rhode Island all the utility company street lights have 120V PCs. They used a mix of 120V-only lights and 240V with 120V PC lights. The 240V with 120V PC fixtures were used between 1964 or 1965 and around 1988. Before 1964/65 and from 1989 onward all the lights were 120V. Another utility company had always used 120V lights. The three major utility companies were all bought out by National Grid around 1998-2000. There is one municipal utility in the northwest corner of the state though, which uses all 120V lights. They're going LED now but before LEDs they used OVHs, OVZs, 115s, Durastar 2000s, and lots of 50W HPS NEMA heads.