MEC 2 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM056 Rev 6 05/10/15
Thomson Technology
29
used for Auto Mains Failure (AMF) applications. Refer to
Section 8.3
.
5
for further
details on the sequence of operation.
5.2.7. ENGINE RUNNING
The designated programmable output relay will energize when the engine has
started and has reached crank disconnect speed.
5.2.8. ENGINE RUN (FUEL)
The designated programmable output relay will energize when the engine ”RUN”
(i.e. FUEL) energizes prior to the engine starting. The output will remain on until
the engine has reached a “stop” or “shutdown” command.
5.2.9. AIRFLAP
The designated programmable output relay will energize when the engine’s
speed exceeds the over speed setpoint level. The output will remain energized
until the engine’s speed drops below the low speed setpoint (typically 5% of rated
speed).
Note:
An external pilot relay will be required if the main air flap solenoid
current rating exceeds the MEC 2 contact rating. (Refer to
Section 2.7
)
5.2.10.ATS TEST
NOTE:
This control feature is only operative if a remote
transfer switch is interconnected with remote
testing capability.
The designated programmable output relay will energize when a load test
operating mode is selected via the front keypad pushbutton. Once initiated, the
engine will receive a start signal from the transfer switch and upon the generator
reaching nominal voltage and frequency levels, a load transfer will be initiated.
The generator set will remain running on load until a different operating mode is
selected or the generator set develops an alarm or shutdown condition.
Notes:
1) The MEC 2’s standard programmable output contact is factory supplied with
the ATS LOADTEST function programmed. When the “Utility Ready to Load” and
“Generator Ready to Load” outputs are programmed, the “Load Test”
Summary of Contents for MEC 2
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