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Operating Instructions
36
Figure 18 Load on one system to Continuous Tie
Figure 19 One system in bypass to both feeders combined on remaining operational system
See 4.2.11 - Tying the UPS Systems - Continuous
Parallel Operations.
LEGEND: M
x
= Module
SS
x
= Static Bypass Switch
M
1
M
1
SS
1
SS
2
M
2
M
2
System 1 System 2
Load 1 Load 2
Tie
Tie Closed
TO:
Continuous Tied Systems
M
1
M
1
SS
1
SS
2
M
2
M
2
System 1 System 2
Load 1 Load 2
Tie
Tie Closed
FROM:
Combined Loads Operation
Momentary Tie
for transfer of
Load 2 to System 1
M
1
M
1
SS
1
SS
2
M
2
M
2
System 1 System 2
Load 1 Load 2
Tie
FROM:
One System in Bypass Mode
Tie Open
See 4.2.3 - Maintenance Procedures - Isolating Each
UPS System.
LEGEND: M
x
= Module
SS
x
= Static Bypass Switch
M
1
M
1
SS
1
SS
2
M
2
M
2
System 1 System 2
Load 1 Load 2
Tie
Tie Closed
TO:
Combined Loads Operation
Momentary Tie
for transfer of
Load 2 to
System 1