Specifications

98AEtypMMSspec_RevB.doc

SP-0011 Rev. B 9/5/09

150 93.5 93.5

225 93.0 93.0

300 93.5 93.5

375 93.5 93.5

500 94.0 94.0

750 94.0 94.0

2.1.7. CLC Power Section specification

The CLC Power Section total kVA capability and associated component ampere

ratings will be dependent on the total UPS MMS configuration, kVA capacity and

output voltage specification. Refer to Mitsubishi Electric CLC Specification for

further details. For detailed information including associated KAIC ratings, refer

to Mitsubishi Electric CLC Specification, UPS MMS Single Line Diagrams (for

system configuration and capacity permutations).

2.1.8. Output Specification

Each system UPS Module shall instantaneously control and equally share the

total critical load current within less than +/-5% of UPS Module rated current.

2.2. UPS MODULE COMPONENTS

2.2.1. Hybrid converter shall be comprised of the following;

A. High Power Diode Bridge Rectifier which 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 in the high power diode bridge rectifier shall

typically not introduce more than 6% reflected input current total harmonic

distortion (THD) into the utility AC input source at nominal voltage and rated

load. The reflected input current shall typically not exceed 9% THD at 50 %

load.

C. The rectifier logic and control circuit power walk in function enables delayed

and timed ramping of input current. Subsequent to energizing the rectifier input,

initiation of the power walk in function and current ramping shall be delayed by

a maximum of 3600 seconds (every 1 second selectable – default at 10

second). Upon initiation of the power walk-in function, the ramping of current

shall be timed to gradually increase the load within 10 seconds. This function

is included as standard in the rectifier control circuitry.

D. Converter input contactor, input fuses, and the input current limit control shall

provide rectifier protection against excessive input overload conditions.

E. In the occurrence of a 100% step load change, the UPS Module inverter shall

draw power only from the rectifier to provide the required load demand. The

charger/booster shall not be utilized and the system batteries will not be cycled

at any time during a step load change.