Specifications

98AEtypSMSspec_RevC.doc

SP-0012 Rev. C 09/05/09

within +/-5% of the nominal value.

D. Voltage Transient Response

The dynamic regulation and transient response shall not exceed +/-2% for 100% step

load (applied or removed), +/-1% for loss or return of AC input and +/-5% 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 16.7 ms

F. Frequency Control

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

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

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

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

+/- 0.05% continuously. The Inverter output frequency shall not vary during steady

state or transient operation due to the following conditions:

1. 0 to 100% loading.

2. Inverter DC input varies from maximum to minimum.

3. Environmental condition variations within the specifications defined herein.

G. Output Harmonic Distortion

The inverter output shall limit the amount of harmonic content to 2% maximum 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.

H. Output Overload Capability

The inverter output shall be capable of providing an overload current while maintaining

rated output voltage (and voltage regulation) to:

105% to 125% for 10 minute duration.

125% to 150% for 1 minute duration.

The UPS Module Operation/Display panel LED indication will illuminate to identify an

overload condition. If the time limit associated with the overload condition expires or the

overload is in excess of the set current, the load power shall be transferred to the bypass

source without interruption.

I. Inverter Current Limit

The inverter output current shall be limited to 212% of rated load current. Two current

transformers in separate locations on the output (and operating separately offering

redundancy) shall be employed as means of current sensing.

The inverter current limit protects inverter components from damage due to excessive

over-current (Excessive load, faults and reverse current)