Tripp Lite S3M120KXD Owner's Manual

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3. Installation and Setup

3.6 UPS Installation for Parallel Systems

Warning:

• The input harmonic current distortion will be between 3% and 4.5% in parallel UPS operations.

• One parallel kit is needed for every two UPS systems.

3.6.1 Input and Output Wiring

1. When installing the parallel system, the length of input wires (R, S, T, N) in one UPS must be equal to the input wires of the other UPS.

Likewise, the length of output wires (R, S, T, N) must also be in equal length. If not, it will cause unbalanced current on the output load.

Figure 3.6 Single Input Wiring In Parallel System

Maintenance

Breaker

Output

Breaker

Input

Breaker

AC I/P 1

Parallel Cable

Load

Input 2 Input 1

Output

Static Switch

UPS Module

Bat Module

UPS Module

RECT Inv

Charger

Maintenance

Breaker

Static Switch

Output

Breaker

Input

Breaker

Input 2 Input 1

Output

UPS Module

Bat Module

UPS Module

RECT Inv

Charger

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Tripp Lite S3M120KXD SmartOnline S3MX Series 3-Phase 380/400/415V 120kVA 108kW On-Line Double-Conversion UPS