Specifications

4 Implementing UPS Configurations with Microsoft Cluster Server

In a switching power environment (power supplies in the server), a cos(ϕ)=0.707

is assumed. So we can calculate:

For better calculating we assume:

This was a short introduction to power, but now we will describe the UPS units in

detail.

2.1 Smart-UPS family

The Smart-UPS family is a line-interactive UPS designed to provide clean,

reliable AC power. Under normal line conditions, the UPS provides power from

the utility line to the output loads. The UPS’s bidirectional inverter is always

running. When operating online the inverter runs backwards to charge the

batteries and maintain an optimum float charge on the internal battery. A surge

suppression and filtering network protects the load from surges and EMI/RFI

noise. SmartTrim and SmartBoost compensate for high and low input voltages

without drawing power from the battery.

The UPS continuously monitors the line in anticipation of utility failure and

prepares the inverter for synchronous transfer of the load. Upon occurrence of a

utility voltage failure such as a blackout, severe brownout or overvoltage, the

UPS transfers the load to power derived from the internal battery. The voltage

waveshape delivered during battery operation is a low-distortion sine wave.

Resynchronization and retransfer to power derived from the utility is automatic

upon recovery of the line voltage to within the normal range.

The UPS features user-replaceable batteries. Users can replace batteries without

having to remove power from the loads or send the UPS in for service.

The complete range of the APC Smart-UPS family is available at:

http://www.apcc.com/products/smart-ups/index.cfm

http://www.apcc.com/products/smart-ups_rm/index.cfm

2.1.1 SU2200RMXLINET

SU2200RMXLINET is a rack-mount UPS offering extended run-time (XL).

Increased on-battery run time is obtained with the addition of up to 10 optional

battery packs. Optional battery packs may be added as needed in the field, since

each battery enclosure includes an auxiliary battery input connector. In this

fashion, battery packs may be arranged to meet the needs of the application.

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