Specifications

98AEtypSMSspec_RevC.doc

SP-0012 Rev. C 09/05/09

2.1.6 DC input and Battery

1. Voltage: 480V DC nominal, 400V DC minimum.

2. Voltage ripple (normal operation): less than 2% of DC voltage.

A. The Battery System shall be sized to provide the specified back-up time to the

inverter when the UPS is supplying 100% rated load.

B. Each Battery System shall include a disconnect 600V DC circuit breaker to

facilitate isolation of UPS Module DC Input and the Battery System. The DC

Circuit breaker shall incorporate an UVT relay and auxiliary contact

connections to the UPS Module control for prevention of incorrect start up and

shutdown sequencing.

C. The battery system shall be capable of operating in an average ambient

temperature of 25°C, with excursions of 16°C to 32°C and shall be sized as

follows:

 Float Voltage: 545V DC (2.25 to 2.27 V/cell)

 Final Voltage: 400V DC (1.67 V/cell)

2.1.7 Efficiency

UPS Module

Capacity (kVA)

Battery to AC

(100% Load)

AC to AC

(100% Load)

100 0.935 0.935

150 0.935 0.935

225 0.930 0.930

300 0.935 0.935

375 0.935 0.935

500 0.940 0.940

750 0.940 0.940

2.2 COMPONENTS

UPS module shall be comprised of the following;

2.2.1 Hybrid Converter Section:

AC input, converter input contactor, converter input fuse, input harmonic filter, and hybrid

converter utilizing;

2.2.1.1 High Power Diode Bridge Rectifier

A. General

A high power diode bridge rectifier converts the utility AC input power into regulated DC

power that serves as the inverter input and also as dc charge power to the system

battery through the chopper/booster. An AC reactor and capacitor shall filter the

harmonic content of rectifier input.

B. Reflected Harmonic Content

The high power diode bridge rectifier shall typically not introduce more than 6% reflected