Service and Maintain

Utilities 18
Transformers and switchboards
The input power for the Critical IT Loads requires a source of 380-415V, 3phase Wye power. This may
require custom transformer(s) be provided to derive this power if it does not already exist at the source. In
addition to the overall loading and KVA size, considerations should be given to the Harmonic Content of the
installation when specifying the K-Factor of the transformer(s). Alternatively, Harmonic Mitigating
Transformers might be used to passively cancel the harmonics generated by the IT Equipment.
HP offers several powerhouse solutions that include automatic transfer switching, UPS backup, transformers
and output distribution switchboards to supply your power needs.
On-site connections may include:
 Main facility power to the primary side of the transformer
 Transformer to the switchboard
 Switchboard assembly to the HP POD 240a
For connection information, see the HP Site Preparation Drawing Package (on page 6).
Preparing the site for power
 The customer must provide and submit the following fully coordinated drawings showing the exact
routing, plan view, sections, and elevations, for approval before beginning site preparation:
o Coordinated underground conduit routing drawings
o Site pad drawings
 The HP POD 240a requires an external transformer and switchboard. If the customer provides their own
transformer and switchboard, they must also provide HP with the engineering drawings.
IMPORTANT: To provide power to the HP POD 240a, external transformers and switchboards
may be required. This equipment must be designed and installed to adhere with local, state, and
national codes, and installed by contractors with licensing required by the local jurisdiction;
city, township, and state.