Murphy EMS-GC10, Operator'S Manual

Page: 49 / 183

Section 75 00-02-0878
2013-03-07 - 43 -
The stop sequence will be activated if a stop command is given. The stop sequence
includes the cooling down time if the stop is a normal or controlled stop.
Description Cooling Down Stop Comment
Auto mode stop X X
Trip and stop alarm X X
Stop button on display (X) X Manual. Cooling down is interrupted if the stop button is
activated twice.
Remove "auto start/stop" X X Auto mode: island operation and load takeover.
Emergency stop X Engine shuts down and GB opens.
The stop sequence can only be interrupted (to go back to running) during the cooling
down period. Interruptions can occur in these situations:
Event Comment
Mains failure AMF mode selected (or mode shift selected ON) and auto mode selected.
Start button is pressed Auto mode: engine will run in idle speed.
Binary start input Auto mode: island operation and load takeover.
GB close button is pressed Manual mode.
Setpoints Related To The Stop Sequence
- Stop failure (parameter 4580 Stop failure)
A stop failure alarm will appear if the primary running feedback or the generator voltage
and frequency are still present after the delay in this parameter has expired.
- Stop (parameter 6210, 6211, 6212, 6213, 6214, Stop)
Cooling-down:
The length of the cooling-down period.
Extended stop:
The delay after the running feedback has disappeared until a new start sequence is
allowed. The extended stop sequence is activated any time the stop button is pressed.
Cool down controlled by engine temperature:
The engine temperature-controlled cool-down is to ensure that the engine is cooled
down below the setpoint in parameter 6214 "Cool down temperature" before the engine
is stopped. This is particularly beneficial if the engine has been running for a short
period of time and therefore not reached normal cooling water temperature, as the cool-
down period will be very short or none at all. If the engine has been running for a long
period, it will have reached normal running temperature, and the cool-down period will
be the exact time it takes to get the temperature below the temperature setpoint in
parameter 6214.