Power Options
Customers have requested a number of options for power delivered to their cabs recently. Our first blade server required twin three phase connections. The two cream cables are the existing single phase connections to power the rest of the rack and the two black cables are the three phase connections for the blade chassis. This HP chassis takes 2.5kW of power.
One customer asked for remotely switchable and metered power distribution units to be insatalled in their racks. They can measure power and power cycle servers remotely using these PDUs
Many customers are installing -48V supplies in their racks for telecommunications equipment. We are currently invetigating the possibility of installing a common -48V service within our building so that customers do not have to install their own on a cab by cab basis. This is a dual PSU configuration. Notice that the actual voltage is -54.5V rather that -48V. Confusing isn’t it?
In this example the customer uses a static switch to power the -48V supply from both A and B power.
January 13th, 2009 at 2:58 pm
In the picture given as an example of a customer using a static switch to power the -48V supply from both A and B power, the battery blocks at the base of the cabinet/rack have visibly un-shrouded terminals, above which is placed a painted metal cover.
In the interest of safety, would it not be advisable to shroud the terminals or, better still house the UPS in a non-conducting protective enclosure?
Also, which version of GE’s ‘SG’ UPS are you using, Series 1 or the PurePower?
January 13th, 2009 at 4:35 pm
Thanks for the comment Alan, we’ve notified the vendor and asked them to look into it.
The UPS’ are “PurePulse”.