Testing; Simulation Mode - GE 489 Instruction Manual

4 SETPOINT PROGRAMMING

4.13 489 TESTING

T

SIMULATION MODE

T
[ENTER] for more
The 489 may be placed in several simulation modes. This simulation may be useful for several purposes. First, it may be
used to under-stand the operation of the 489 for learning or training purposes. Second, simulation may be used during star-
tup to verify that control circuitry operates as it should in the event of a trip or alarm. In addition, simulation may be used to
verify that setpoints had been set properly in the event of fault conditions.
The setpoint may be entered only if the generator is offline, no current is measured, and there are no
SIMULATION MODE
trips or alarms active. The values entered as Pre-Fault Values will be substituted for the measured values in the 489 when
the is "Simulate Pre-Fault". The values entered as Fault Values will be substituted for the measured val-
SIMULATION MODE
ues in the 489 when the
SIMULATION MODE
Pre-Fault values will be substituted for the period of time specified by the delay, followed by the Fault values. If a trip
occurs, the
SIMULATION MODE
489 measures current or control power is cycled, the
If the 489 is to be used for training, it might be desirable to allow all parameter averages, statistical information, and event
recording to update when operating in simulation mode. If however, the 489 has been installed and will remain installed on
a specific generator, it might be desirable assign a digital input to Test Input and to short that input to prevent all of this data
from being corrupted or updated. In any event, when in simulation mode, the 489 in Service LED (indicator) will flash, indi-
cating that the 489 is not in protection mode.
GE Power Management
ð
SIMULATION MODE:
ENTER
Off
ESCAPE
PRE-FAULT TO FAULT
ESCAPE
TIME DELAY:
MESSAGE
is "Simulate Fault". If the
reverts to "Off". Selecting "Off" for the
SIMULATION MODE
489 Generator Management Relay
Range: Off, Simulate Pre-Fault, Simulate Fault, Pre-Fault
to Fault
Range: 0 to 300 s in steps of 1
15 s
is set to "Pre-Fault to Fault", the
SIMULATION MODE
places the 489 back in service. If the
SIMULATION MODE
automatically reverts to "Off".
4.13 489 TESTING
4.13.1 SIMULATION MODE
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