Galaxy PW™ UPS 100 to 225kVA

4.1.3Single UPS Unit

The inverter starts, then, if the bypass AC source transfer conditions are satisfied, the load is transferred to the inverter, if the on-line mode is selected.

For on-line mode:

◗The green "inverter" light 4 remains on.

◗The "static-bypass" light 3 goes off.

Figure 4-2: Single UPS Diagram .

A B

1

D

C

2

4.1.4Parallel UPS Unit

The inverter starts and awaits the start of the other inverters. When they are all on or enough have been started to supply the rated load power, the output switch for each running inverter closes and the load is supplied with power:

◗The green "static-bypass" light 3 goes off.

◗The green "inverter" light 4 on the control panels of the running inverters goes on.

Figure 4-3: Two Parallel Connected UPS Units.

Q3BP

Q5N

1

2

S

2

 

 

Galaxy 1

 

 

 

1

2 Galaxy 2

Figure 4-4: Four Parallel Connected UPS Units.

Q3BP

Q5N

1

2

2

Galaxy 1

 

1

2 Galaxy 2

1

2 Galaxy 3

1

2 Galaxy 4

4 — 2

Operation

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