MEC 320 GENSET CONTROLLER
PM079 Rev 0 07/06/08 9 Thomson Technology
Applications
The unit can be used for the applications listed in the table below.
Application
Comment
Load take over
Standard
Automatic Mains Failure (no back sync. /
Open Transition)
Standard
Automatic Mains Failure (with back sync. /
Closed Transition)
Standard
Gen-set mode
Running mode
Auto
Semi
Test
Man
Block
Load take over
X
X
X
X
X
Automatic Mains Failure (no back sync. /
Open Transition)
X
X
X
X
X
Automatic Mains Failure (with back sync. /
Closed Transition)
X
X
X
X
X
Load take over
Auto mode description
Back synchronizing ON (Closed Transition)
The purpose of the load take over mode is to transfer the load imported from the mains to the
gen-set for operation on generator supply only.
When the start command is given, the gen-set will start and synchronize the generator breaker
to the mains. When the generator breaker is closed, the imported load is decreased (the power
is being transferred to the gen-set), until the load is at the open breaker point. Then the mains
breaker opens.
When the stop command is given, the mains breaker is synchronized to the generator and after
closure the gen-set is deloaded, cooled down and stopped.
A 4-20mA transducer is used for indication of the power imported from the mains.
See mode overview in chapter 6 on page 46 for short description.
The flowcharts below illustrate the full functionality of the mentioned gen-set
modes.
This section about applications is to be used for reference using the particular
gen-set mode as starting point. It is not suitable for reading from beginning to
end.
Summary of Contents for MEC 320
Page 2: ......
