Short cycle and surge protection for 120, 208, and 240 VAC loads with protection against these three things.
LED indicators show you what’s going on right now so you can quickly and easily figure out what’s wrong.
Voltage-sensing technology that automatically picks up on changes in the voltag. 120-240 VAC is the universal input voltage.
ANSI/UL 1449 3rd edition meets all of the requirement.
For safety, UL has been approved by the company.
Power surges can cause air conditioner compressors to break down without warning. Let Intermatic’s Compressor Defender take the hit so that air conditioners are never interrupted by a broken compressor. Protecting compressors and circuit boards in residential and light commercial applications is easy with the all-in-one Compressor Defender device. It keeps them safe from brownouts, surges, and short cycles. The protective device can be put inside a condensing unit or on a compressor outside. LED indicators show you what’s going on right now, so you can figure out what’s wrong quickly and easily. For voltage drop protection, this meets AHRI Standard 110-1012 Range B2. Specifications. 120-240 volts of electricit. Control Output Current Rating: 2A @ 24 VAC, isolated N.C. contact. Voltage Protection Rating: L-N/G: 700V, L-L: 1200V. Nominal Discharge Rating: In (10 kA). Max Continuous Over-Voltage (MCOV): L-N/G: 150V, L-L: 300V. Short Circuit Current Rating: 20 kA. Under-Voltage Response Time: 3 lines. Operating temperature: -40°F to 158°F (-40°C to 70°C).
Some older systems don’t have the newer technology already built into the control board for the outdoor compressor unit. This product is OK, but it’s mostly for systems that don’t have that technology already. The 240-volt surge protection seems to be fine for a typical SPD, but the 24-volt line on the Compressor Defender isn’t going to be needed on most HVAC systems built in the last 20 years. This is what I mean. On the 24-volt line, the Compressor Defender doesn’t protect against surges. That’s the line that gets power from your thermostat to the outdoor compressor control board and the air handler unit inside. There is only one thing that the 24 volt line on the Compressor Defender does. When there is no power for a few seconds or a few hours, the 24-volt line on the Compressor Defender delays connecting to the compressor control board for three minutes. A “compressor short cycle” can happen if the compressor stops and then starts back up too quickly, which can damage it. This is to make sure that doesn’t happen. A short-cycle protection circuit built into most outdoor compressors and heat pump systems already stops this from happening. This is because most of today’s outdoor compressors and heat pump systems already have this. Compressor Defender has 24-volt lines that you can connect to your compressor control board. If you do this, you’ll get a double delay, which isn’t very useful. Compressor Defender: The 24-volt line only protects against short cycles. You won’t be able to figure this out just by reading about or looking at this product (no surge protection to the 24-volt components). After I bought the product and called the company’s tech support a few times, I only found out about this after I found out about it.
If you get one of the amateur techs like the first one I talked to, the Intermatic tech support can be a little shady. They should not be in tech support at all. Someone hung up on me when I asked to talk to someone else (lol). I called back, and the next person was a lot more helpful and knew a lot more about electrical components than the first one. So, you pay about twice as much for the Intermatic CD1-024R than you should have because it doesn’t have 24-volt short-cycle protection. Instead, you could buy the Intermatic AG3000 for about half the price. Also, I think the Siemens FirstSurge FS140 is a better product for protecting against surges than either of these two (I have reviewed the Siemens product too).
EDIT.
http://www.stevejenkins.com/blog/2014/10/whats-the-best-whole-house-surge-protection/ur.
You can read a very good review of Whole-House Surge Protection Devices at the link above. It was written by a third-party reviewer who looked at a few products and gave them a grade. A third-party article said that having both service panel surge protection and point-of-use surge protection (like a plug-strip type) is a very good way to protect all of your electrical items from surges and spikes. A lot of people don’t know that a lot of damage comes from phone lines and cable/satellite connections as well, so things like TVs, cable and satellite receivers, modems, routers, cordless and corded phones, and so on, are at risk if they don’t have extra protection.
