UPS's
Years ago I bought a Cyberpower Uninteruptable Power Supply from Dell for $160. The model number I can't remember, it was a 1500VA model. It worked for a few years, then I moved to Calgary and it died when I performed a battery test. When I lived on the east coast, this UPS actually did work for a number of times when I did lose power. Eventually the UPS began to fail and power off. I think a component in the AVR section blew up; likely a shitty Chinese MoSFET or capacitor.
I did disassemble the unit to try and find the faulty component, I narrowed it down to the transformer and 1 transistor. There was nothing wrong with the battery. I swore after that I would never buy a cheap china UPS again. The output voltage sine wave is something more like a digital signal: 100% on, 100% off.
There were a few teardowns of this UPS on Youtube and the Cat5 and coax protection was almost non-existent. The manufacturer skimped on using MOV's in the input section, clearly a cost cutting action. Without those MOV's your circuitry is vulnerable to high voltage and static discharges.
I ended up buying a Tripp Lite UPS, something with decent quality and cost. I just need something to provide stable power in order to shutdown my computer and nas system.
I did disassemble the unit to try and find the faulty component, I narrowed it down to the transformer and 1 transistor. There was nothing wrong with the battery. I swore after that I would never buy a cheap china UPS again. The output voltage sine wave is something more like a digital signal: 100% on, 100% off.
There were a few teardowns of this UPS on Youtube and the Cat5 and coax protection was almost non-existent. The manufacturer skimped on using MOV's in the input section, clearly a cost cutting action. Without those MOV's your circuitry is vulnerable to high voltage and static discharges.
I ended up buying a Tripp Lite UPS, something with decent quality and cost. I just need something to provide stable power in order to shutdown my computer and nas system.
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