Specifications

Distribution Products Catalog CA08101001E—October 2010 www.eaton.com 61
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16.4
Tr a n s f er Switches
Magnum-Based Designs
Sequence Flow Chart—Soft Load ATS with Extended Paralleling Capabilities
Note

Or switch SYSTEM TEST selector switch to OFF.
AUTO/TEST
Loss of
Normal Source
Auto Test
Start Engine
Transfer Load
to Generator —
Open Transfer
Utility Returns
Transfer Load
to Utility —
Soft Transfer
Stop Engine
after Cool Down
End
TEST MODE
Start Engine
Transfer Load
to Generator —
Soft Transfer
Transfer Load
to Utility —
Soft Transfer
Stop Engine
after Cool Down
End
SYSTEM TEST
Test
Off
Run
Off Start Engine
Stop Engine
AUTO/TEST
TestAuto
햲
End
Engine Continues
to Run
Breaker Logic
— Interchange
(Soft Load/Unload)
Breaker Logic
— Interchange
(Soft Load/Unload)
Start Engine
Close the
Generator Breaker
and Soft Load
the Generator
Soft Unload the
Generator and
Open the Source 2
(Emergency)
Breaker
Stop Engine
after Cool Down
End
Breaker Logic
— Parallel
(Baseload)
Start Engine
Breaker Logic
— Parallel
(Import/Export)
Mode 1 Mode 2
OR
AUTO/TEST
TestAuto
햲
Maintain Baseload
Generator Power
Output
Stop Engine
after Cool Down
End
AUTO/TEST
TestAuto
햲
Maintain Import/
Export Generator
Power Output
Synchronize
Generator
to Utility
AUTO/TEST
TestAuto
햲
Load Stays
on Generator
Synchronize
Generator
to Utility
Synchronize
Generator
to Utility
Synchronize
Generator
to Utility
Close the Source 2
(Emergency)
Breaker and
Soft Load
the Generator
Soft Unload the
Generator and
Open the Source 2
(Emergency)
Breaker