Site Wiring Options for Dual AC - Data Warehouse Appliances

2700 Platform Product and Site Preparation Guide

prodname
Data Warehouse Appliances
created_date
March 2018
category
Product Guide
featnum
B035-5341-092K
Dual AC can be implemented at a customer site in one of the following ways:
  • Two separate utility power sources
  • Two separate circuit breaker panels
  • Two site UPSs

Site wiring decisions should be made with an understanding of how the customer will benefit from the dual AC feature.

A site UPS is not required.

Separate Power Sources

Some customers have two separate sources of AC power. For example, a customer’s site may receive power from two different power substations. In this case, left side AC feeder box(es) and blue AC box(es) can be connected to one source, and right side AC feeder box(es) and orange AC box(es) can be connected to the other source. If the source supplying the AC feeder box(es) or AC box on one side of the cabinet fails, the current on the AC feeder box(es) or AC box on the other side of the cabinet will increase, allowing the system to continue operating.

Separate Circuit Breaker Panels

Some customers are concerned about the loss of power to the system during electrical maintenance work on the site. In this case, the system can be wired so left side AC feeder box(es) and blue AC box(es) can be connected to one circuit breaker panel, and right side AC feeder box(es) and orange AC box(es) can be connected to another circuit breaker panel. If the circuit breaker panel supplying the AC feeder box(es) or AC box on one side of the cabinet is accidentally shut off, the current on the AC feeder box(es) or AC box on the other side of the cabinet will increase, allowing the system to continue operating.

Two Site UPSs

Some customers may have two site UPSs. If so, the site can be considered as having two separate power sources.