Tripp Lite S3M20K-20K4T Owner's Manual

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36

4. Operation

4.1.3 Bypass Mode

If the inverter is out of order, or if overload occurs, the static transfer switch will activate to transfer the load from

the inverter supply to bypass supply without interruption to the critical load. In the event the inverter output is not

synchronized with the bypass AC source, the static switch will perform a transfer of the load from the inverter to the

bypass with power interruption to the critical AC load. This is to avoid paralleling of unsynchronized AC sources. This

interruption is programmable but typically set to be less than an electrical cycle, e.g. less than 15 ms (50 Hz) or less than

13.33 ms (60 Hz).

SINGLE INPUT: Mains Input DUAL INPUT: Mains Input and Bypass Input

Figure 4-3: Bypass Mode

4.1.4 ECO Mode

When the UPS is at AC Mode and the requirement to the load is not critical, the UPS can be set at ECO mode in order

to increase the eciency of the power supplied. At ECO mode, the UPS works at Line-Interactive mode, so the UPS will

transfer to bypass supply. When the AC is out of set window, the UPS will transfer from bypass to Inverter and supplies

power from the battery, and then the LCD shows all related information on the screen. The UPS will default to ECO

Mode after powering up.

Figure 4-4: ECO Mode

Maintenance Breaker

AC Input

Bypass Input

Output

Maintenance Breaker

Static Bypass

Rectier

Battery Breaker

Inverter

Output Breaker

Bypass Breaker

Battery Input

Input Breaker

Static Bypass

Maintenance Breaker

AC Input

Output

ECO Mode

Static Bypass

Rectier

Battery Breaker

Inverter

Output Breaker

Bypass Breaker

Battery Input

Input Breaker

Bypass Mode

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Tripp Lite S3M20K-20K4T 3-Phase 208V UPS + Input Isolation Transformer Kit - 480V Delta to 208V Wye, 20kVA/kW, 3 Internal Strings

Owner's Manual - Page 36