Not only for the environmental reasons that you may expect, but for the economic benefits seen by incorporating Green IT in the data centers. Going “green” means measuring, analyzing and controlling power usage to enable effective capacity planning along with aptitude to make change for decreased usage – all leading to improved efficiency and a controlled carbon footprint.
Yes, any Server Technology 3-phase Metered, or 3-Phase Intelligent (Smart, Switched, POPS) functional CDU products will provide Branch or Phase current displays for local hands-free viewing to immediately identify balanced loads. This information is also available remotely through any Intelligent CDU communications interface.
Topics: ask the engineer
In most cases it is much more than ‘simply considering the power-strip hardware configuration’. How a Power distribution solution is implemented can lead to reduced downtime, improved power efficiencies, improved power monitoring, management and control. The best suited Power Distribution solution requires considerable planning. First, system solution level questions must be evaluated (1), key issues determined (2), and then the required CDU features can be realized (3).
Topics: ask the engineer
The combined load of branches on a power strip may be capable of exceeding the upstream input protection. There is a fundamental misunderstanding of the purpose of the power strip internal fuse protection. The fuses are not there to keep the upstream breaker from tripping. Circuit protection within the power strip is there to protect the outlets and wiring to the outlets. Thus, a power strip may be protecting the branch outlets at 20A per NEC allowance while the upstream breaker is protecting the wiring and under-floor receptacle.
Branch circuit protection on a 20A rated power strip is not an National Electrical Code1 (NEC) requirement. Server Technology has both 20A Inlet rated CDU products with and without branch circuit protection. The presence of Bussmann SC-20 fuses on 20A units, even though not required, allows for selective coordination with short-circuit faults. Fuses react fast enough to halt a short-circuit fault nearest the fault while also reducing let-through to upstream and parallel branch gear.
Question from Steven G.: How do I calculate the power usage for devices attached to one of your Smart PDU's by looking at the digital readouts on them? I understand the 3-phase power calculation of P=VA*1.73, but is that done on each leg/phase (x,y,z) for the PDU? An example from a CS-24VY-L30MA is X=4.6, Y=4.6, Z=6.3
Topics: 3 Phase power
On occasion, an installation consists of only a few cabinets and it is desirable to place individual UPS units within each cabinet. Although Server Tech does not provide UPS products and remains manufacturer agnostic, there are a couple things that should be considered from the power distribution point of view.
Question from Carlton <omitted>: I have multiple remote DSL modems that each stop working two to three times a week. I've deployed 2-outlet Sentry Switched CDU units to allow me to remotely reboot them when they hang, and they work great! But, I have to wait until someone notifies me of the problem, then I have to manually login to the CDU to initiate the reboot. I've noticed that the DSL modems fail to respond to ping requests when they hang. Is there a method available to automatically reboot the DSL modems when they stop responding to ping requests?
This is a common question I receive: How much power should I provision for my cabinets?
Topics: data center power
Question from Jay <omitted>: I am presently evaluating a CDU model #CS-27VY-L30M and have noticed that the power input cordage does not involve an oversized neutral conductor. All five conductors are 10-gauge AWG. Isn't an oversized neutral required to avoid the possibility of overheating the conductor?