Specifications

U-ENS00011_99AtypSMSSpec_Rev2.doc

U-ENS00011 Rev2 12/9/08

1. Solid state P WM controlled IGBT power transistors.

2. UPS Module Full Direct Digital Control (DDC) Adoption:

a. Field Progra mmable Gate Array (FPGA) Control.

DSP based Control

B. V oltage Regulation

The inverter output voltage shall not deviate by more than ±1% RMS with the following

steady state conditions:

1. 0 to 100% loading.

2. Inverter DC input varies from maximu m to minimum.

3. Environmental condition variations within the specifications defined herein.

C. Voltage Adjustments

The inverter shall have the ability to manually control and adjust the output voltage to

within s5% of the nominal value.

D. Voltage Transient Response

The dynamic regulation and transient response shall not exceed s2% for 100% step

load (applied or re moved), s1% for loss or return of AC input and s5% for inverter to

bypass and vice versa transfer.

E. Transient Recovery

Voltage transient response shall not exceed the above specification and shall recover to

within nominal voltage regulation tolerance within 20 ms

F. Frequency Control

The Inverter output fre quency shall be controlled by an oscillator internal to the UPS

module logic. It shall be capa ble of synchronizing to an external reference (e.g. the

bypass source) or operating asynchronously. A me ssage located on the touch screen

shall identify the loss of synchronization. Synchronization shall be maintained at 60 Hz

± 0.01% continuously for the duration of loss of the external reference. The Inverter

output frequency shall not vary during steady state or transient operation due to the

follo wing conditions:

1. 0 to 100% loading.

2. Inverter DC input varies from maximu m to minimum.

3. Environmental condition variations within the specifications defined herein.

G. Output V oltage Harmonic Distortion

The inverter output shall limit the amount of harmonic content to 2% maximu m at 100%

linear load, and 5% maximum at 100% non-linear load. The need for additional filtering

to limit the harmonic content shall not be required. Therefore high efficiency, reliability

and original equipment footprint are maintained.