Tripp Lite SU80K3/3PM, SU80K3/3INTPM, SU50K3/3INTPM, SU50K3/3PM owner manual Normal Mode

Electrical Connection (continued)

Parallel Wiring Diagrams

In a parallel connection, up to eight UPS Systems are connected to a single load. A parallel connection provides fail-safe redundancy, assuring that the load is constantly supported even if one or more UPS Systems fail or are taken off-line for maintenance. Within a parallel architecture, there is a “single loop” connection option (where only one input source is used) and a “double loop” connection option (where two input sources are used). Note: in both connection options the total length of all cables (input, output and reserve) must be the same for each UPS Power Module to prevent load inequality.

All Models

• Single Loop Connection (one input source used)

• Double Loop Connection (two input sources used)

LOAD

Single UPS Operation

The diagrams and procedures in this section apply to a single UPS Power Module connected to a single equipment load. Note: all diagrams assume

the presence of two separate AC sources supplying two separate inputs: a mains source supplying rectifier input and a reserve source supplying reserve input. If your application only allows a single mains AC source, this source will supply both rectifier and reserve input.

• Operational Modes	•	Shutdown Procedure
• Start-Up Procedure	•	Manual Maintenance Bypass Procedure
Operational Modes
Normal Mode

In this mode, the power module continuously converts AC input power into DC power (to recharge the batteries and supply the inverter). The inverter, in turn, transforms DC power into clean, stable AC output power for the connected equipment load.

Back-Up Mode

In this mode, utility AC input power has failed. Since the UPS System operates continuously on-line, connected battery modules instantly (with zero transfer time) supply DC power to the inverter. The inverter, in turn, transforms DC power into clean, stable AC output power for the connected equipment load.

8