Chapter 7 : Ups Operation; Start-Up Procedures; Normal Mode Start-Up Procedures (Single) - Delta NT-15K User Manual

Please check the following items before start-up of the UPS.
1. All circuit breakers or switches are in the OFF position.
2. Each external battery cabinet's battery breaker is in the OFF status.
3. Ensure that neutral line and grounding have the same voltage.
4. Before supplying power to the UPS, check that input voltage, frequency and
5. Ensure that every fuse is in the 'CONNECTION' status.
If you perform turn-off procedures, all power supplying to the UPS will be
completely cut off. Please make sure the critical loads connected to the UPS

7.2 Start-up Procedures

7.2.1 Normal Mode Start-up Procedures (Single)

NOTE : Before executing the following start-up procedures, please refer to 7.1
1. Turn on the Reserve Input breaker, and the LCD will display 'Bypass Mode'.
2. Turn on the
DC BUS voltage will be established to 393V.
3. Turn on each external battery cabinet's Battery breaker.
4. Press the 'ON' and '
inverter will start up. Once the inverter voltage is established, the power will be
switched from bypass to inverter. At this moment, it will be the inverter to supply
power to the connected loads, and the LCD will display 'Normal Mode'. After
30 seconds, the UPS will automatically execute a battery test to check if the
connected batteries are normal or not.

Chapter 7 : UPS Operation

breaker and wait about 30 seconds. After that, the
' buttons simultaneously for 3 seconds. After that, the
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Chapter 7 UPS Operation