Tripp Lite SU60KX Manual

A SERVICE OF

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14

PRELIMINARY

1 Basic Operation (continued)

1.3 Operating Principles (continued)

1.3.3 Power Module Layout

1.4 Opening and Closing the Unit

[PENDING]

Charger

R

S

T

N

U

V

W

N

INPUT OUTPUT

BATTERY

Fig 1.3.3a Power Module Block Diagram

The SU-Series 3-Phase UPS double-conversion power modules consist of three components (Figure 1.3.3a):

1) An AC/DC converter

2) An AC/DC inverter

3) A charger

The power module’s 3-phase, 4-wire input runs A/C current through the AC/DC converter to generate regulative dual DC bus (±370Vdc). During

backup mode, this current is provided by battery power.

The dual DC bus then runs through the AC/DC inverter to generate a pure sine wave of AC power (3-phase, 4-wire). The DC bus also charges the

dual battery strings by running current through the charger. Each power module has a maximum charge current of 5 A.