Site Preparation Guide, Eighth Edition - Superdome HP 9000 Systems

Chapter 1

System Specifications

Electrical Specifications

This section provides electrical specifications for Superdomes.

Grounding

The site building shall provide a safety ground/protective earth for each AC service entrance to all Superdome

cabinets.

This equipment is CLASS 1 and requires full implementation of the grounding scheme to all equipment

connections. Failure to attach Protective Earth results in loss of regulatory compliance and creates a possible

safety hazard.

Circuit Breaker

Each Superdome cabinet using a 3-phase, 4-wire input requires dedicated circuit breaker to support the

Marked Electrical current of 44A per phase. The facility electrician and local service codes will determine

proper circuit breaker selection.

Each Superdome cabinet using a 3-phase 5-wire input requires a dedicated circuit breaker to support the

Marked Electrical current of 24A per phase. The facility electrician and local service codes will determine

proper circuit breaker selection.

NOTE See Table E-1 on page 104 for systems that are configured with less than a full compliment of

cell boards, memory, and I/O modules.

NOTE When using the minimum sized breaker, always choose circuit breakers with the maximum

allowed trip delay to avoid nuisance tripping.

NOTE As of March, 2002, PDCA Options 4 and 5 are obsolete.

Detailed site power information is required to configure the system correctly and prevent delays in system

installation. Collect the following information from the customer site electrician before selecting the

appropriate PDCA.

• Type of source available 4-wire_____ 5-wire_____

• Source voltage phase-to-phase _____ Vac

• Source voltage phase-to-neutral _____Vac

Using the above information, determine the appropriate power option from Table 1-6.

1. Select the source type that matches the customer source.

2. Within the matching Source Type selection, select the matching voltage range to the customer’s source

voltage.

3. Select the appropriate PDCA.

4. The customer must either provide the correct mating in-line connector or order one from HP. See

Table 1-8 for details.