Frequency Conversion Mode Start-Up Procedures - Delta DPS Series User Manual

6.2.6

Frequency Conversion Mode Start-up Procedures

WARNING:
1. Before turning on the UPS, please read 6.1 Pre Start-up & Pre Turn-off
Warnings thoroughly and ensure that the precautions and instructions have
been followed.
2. Frequency Conversion mode is only applicable to single UPS but not to parallel
UPSs.
3. When the UPS runs in Frequency Conversion mode, once the inverter
becomes off, there is no bypass power supplying to the loads.
Step 1
Ensure that the external maintenance bypass cabinet's Manual Bypass Breaker or Switch
(Q3) is in the OFF position.
Step 2
Switch ON every external battery cabinet's breaker (Q5).
Step 3
Switch ON the external maintenance bypass cabinet's Input Breaker or Switch (Q1) and
Bypass Breaker or Switch (Q2). If the bypass input is within the normal range, the UPS will
run in Bypass mode.
Step 4
Keep the connected loads OFF to avoid wrong frequency damaging the loads. After that,
switch ON the external maintenance bypass cabinet's Output Breaker or Switch (Q4).
Step 5
Log in as Administrator. For the Administrator password, please contact service
personnel.
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