How long should the electronics/relays/etc in an line-interactive UPS last? You will find it difficult to get an answer to this question because it depends on too many factors. Quality of components used in the UPS, the quality of the manufacturing process, shipping/storage between factory and consumer, handling during installation, environment differences (temperature, airflow, input … Read more
The standard answer for this is “not at all”. Fix the software to handle restarts in random order. If you really need SOME servers to start first (example: Active Directory) put them on USV’s that are possibly surviving a LOT longer. A low power atom based server is good enough as Active Directory controller and … Read more
In addition to amcnabb’s answer, higher-end PDUs (though not the one you linked to) will also give you the possibility of not only monitoring (over the network) the current draw for each socket, but also cutting and restoring power to certain sockets remotely.
According to the manual: Replacing the Battery Module This UPS has an easy to replace, hot-swappable battery module. Replacement is a safe procedure, isolated from electrical hazards. You may leave the UPS and connected equipment on for this proce- dure.
You should be safe. It is always OK to put a lower load on a higher rated receptacle. (At the proper voltage that is. Don’t mix 230V and 115V). Just think of it this way: If it wasn’t OK nobody could plug a phone charger (about 2 Amp max) in a standard wall-outlet (10 Amps … Read more
A 3Ø UPS will have 3 phases coming in and 3 phases going out. You then put a 3Ø load onto the UPS. Typically that load will be a distribution panel. As Chris S said, the reason you see 230V is that’s the leg-to-leg voltage. Do note: you have three leg-to-leg circuits instead of one. … Read more
I’ve never heard about replacing a battery causing the UPS to never be the same. The only UPS units that I’ve ever seen are just sealed lead acid batteries that wouldn’t cause issues with the UPS electronics unless they weren’t specced right (proper voltage and amperage rating). I’ve used APC and third party batteries and … Read more
You should consider turning off the circuit breaker to the outlet running the rack in lieu of unplugging the cord from the wall. The UPS is losing its electrical ground when you unplug it from the wall. While it’s unlikely that anything would go wrong, the UPS designers “expect” that path to ground to remain … Read more
Having had some ‘discussions’ with the inspector that comes around our offices once a year to make sure we’re not being bad, I have a better idea as to what code says about this. Paraphrased from said inspector: Thou shalt not plug a power-strip into another power-strip Nor any multi-outlet device into another multi-outlet device, … Read more
To answer the question: This is almost always a lead-acid battery failure causing the battery to vent hydrogen sulfide (H2S). The battery needs to be replaced as soon as possible. As an additional note, H2S can be extremely dangerous at higher concentrations. If you experience eye irritation or difficulty breathing or your ability to smell … Read more