HP Superdome SX2000 User Service Guide, Seventh Edition - HP Integrity Superdo - Page 20

AC Power The ac power system includes the PDCA, one FEPS, and up to six BPS. The FEPS is a modular, 2n+2 shelf assembly power system that can consume up to 17 KVA of power from ac sources. The purpose of the FEPS chassis is to provide interconnect, signal and voltage busing between the PDCAs and BPSs, between the BPSs and utility subsystem, and between the BPS and the system power architecture. The FEPS subsystem comprises three distinct modular assemblies: six BPS, two PDCAs, and one FEPS chassis. At least one 3-phase PDCA per Superdome cabinet is required. For redundancy, you can use a second PDCA. The purpose of the PDCA is to receive a single 3-phase input and output three 1-phase outputs with a voltage range of 200 to 240 volts regardless of the ac source type. The PDCA also provides a convenience disconnect switch/circuit breaker for service, test points, and voltage present LED indicators. The PDCA is offered as a 4-wire or a 5-wire PDCA device. Separate PDCAs (PDCA-0 and PDCA-1) can be connected to 4-wire and 5-wire input source simultaneously as long as the PDCA internal wiring matches the wiring configuration of the ac source. The 4-wire PDCA is used in a phase to phase voltage range of 200 to 240 volts at 50/60 Hz. This PDCA is rated for a maximum input current of 44 Amps per phase. The ac input power line to the PDCA is connected with power plugs or is hardwired. When using power plugs, use a power cord [OLFLEX 190 (PN 6008044) four conductor 6-AWG (16 mm), 600 V, 60 Amp, 90˚C, UL and CSA approved, conforms to CE directives GN/YW ground wire]. When installing cables in locations that have been designated as "air handling spaces" (under raised flooring or overhead space used for air supply and air return), advise the customer to specify the use of data cables that contain a plenum rating. Data cables with this rating have been certified for FLAMESPREAD and TOXICITY (low smoke emissions). Power cables do not carry a plenum rating, they carry a data processing (DP) rating. Power cables installed in air handling spaces should be specified with a DP rating. Details on the various levels of the DP rating system are found in the National Electric Code (NEC) under Article 645. The following recommend plugs for the 4-wire PDCA: • In-line connector: Mennekes ME 460C9, 3-phase, 4-wire, 60 Amp, 250 V, UL approved, color blue, IEC309-1 grounded at 9:00 o'clock. • Panel-mount receptacle: Mennekes ME 460R9, 3-phase, 4-wire, 60 Amp, 250 V, UL approved, color blue, IEC309-1 grounded at 9:00 o'clock. The 5 wire PDCA is used in a phase-to-neutral voltage range of 200 to 240 V ac 50/60Hz. This PDCA is rated for a maximum input current of 24 Amps per phase. The ac input power line to the PDCA is connected with power plugs or is hardwired. When using power plugs, a power cord [five conductors, 10-AWG (6 mm), 450/475 V, 32 Amps,