Installation Manual

2.0.2Single Module Major Internal Components

Input Filter

An input harmonic current filter is standard.

Input Transformers

The single-module is equipped with isolation transformer at the output and an

 

optional transformer at the input. The transformers provide battery isolation or

 

voltage step-up or step-down as required for the particular installation.

Rectifier/Battery Charger

The rectifier/battery charger converts the AC input voltage from the utility source into

 

a DC voltage, supplying the inverter and regulating the charge of the battery system.

 

A capacitor bank filters the DC voltage.

Inverter

The inverter chops the DC voltage supplied from either the rectifier/battery charger

 

or the battery system into a three-phase AC voltage. An AC output filter is used to

 

achieve a computer-grade sinewave output voltage waveform, with a total harmonic

 

distortion of less than 2% under linear-load conditions.

Static Switches

An output and a bypass static switch is provided to transfer the critical load from ups

 

output power to bypass input power without interrupting the supply of power to the

 

load, allowing the load to continue operation while the UPS is being maintained, or

 

in the event of a UPS fault. The static bypass switch assures that voltages from the

 

UPS output cannot feed back to the utility input lines.

Bypass Cabinet

The UPS is designed to use either a single bypass circuit breaker (Q4S) Figure 1-

 

6, or a three-cb maintenance bypass. The three-cb maintenance bypass provides

 

a direct bypass AC input source to supply the critical load while the UPS is being

 

serviced.

Inverter Transformer

During normal operation, the inverter transformer provides complete electrical

 

isolation between the UPS output to the attached load and the utility power source

 

input as well as the UPS battery source.

Description

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