Tripp Lite S3M20K-20K4T Owner's Manual

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5. Parallel System Commissioning

Parallel systems should be commissioned only after setup is complete for the individual systems.

The example below is for commissioning four units in parallel.

1. Conrm the input/output wire connections and input phase sequence are correct. Switch o the battery breaker and

measure to ensure the +/- bat voltages of all battery groups are normal.

2. Connect the parallel cable. It should be a formed loop connection.

3. Switch on the input breaker of unit 1 and access the LCD setting interface to set the parallel working mode, ID,

parallel number and redundant number. (Refer to section 4.3.6.2.) Set required setting for series number and

battery capacity. The output voltage level and bypass protection range are default setting.

4. Turn o the input breaker of unit 1 and make sure the UPS is o. Turn on the input breaker of unit 2. Access the LCD

setting interface to set the parallel working mode, ID, parallel number and redundant number. The other setting are

the same as UPS 1 operation.

5. For unit 3 and unit 4, the operation settings are all the same as units 1 and 2.

6. Turn on Bypass/Input/Output breakers on all the paralleled UPS, then conrm all the settings are correct. Each UPS

has a dierent ID.

7. Turn on all the battery breakers and conrm the battery cabinet voltage and current are normal.

8. Connect the load, and check to ensure the output currents are balance.

9. Switch the utility breaker on and o to test all the UPS units’ converter system going from utility to battery and

restored function are working.

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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