Initial Startup and Electrical Checks
6.0INITIAL STARTUP AND ELECTRICAL CHECKS
This section includes the procedures on how to install the paralleling system for the first time and how to perform initial system checks of each UPS individually before connecting them in parallel.
NOTICE
Miswiring power to the input terminal block
1.Verify that the input and output circuit breakers on UPS are Off (open). To find the circuit breakers, refer to the Liebert
2.Verify that the parallel communication cables are disconnected from the parallel ports.
3.Verify that the UPS is completely Off.
4.Connect the UPS input power wires to the terminal block.
5.Connect the parallel POD utility main input. No load equipment should be connected at this time.
To start the initial electrical checks for each UPS:
1.Switch On (close) the UPS input and output breakers on the parallel POD of only the first UPS to be checked.
2.Measure the voltages of L1, L2, N, and G from the first UPS.
3.Switch On (close) the input and output circuit breakers, which are on the rear of the UPS.
4.Power on the UPS, and make sure it is operating normally.
Refer to the Liebert
5.Make sure the UPS output voltage is correct. If the output voltage of the UPS must be changed with the configuration program, it must be done now.
Refer to the Liebert
6.Power Off the UPS, switch Off (open) the corresponding input and output breakers on the parallel POD and the Liebert
7.Repeat the initial electrical checks on the second and third UPS to make sure each UPS in the paralleling system is operating normally and set for the same output voltage configuration.
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