GE 239

GE Multilin 239 Motor Protection Relay 4-39
4 PROGRAMMING 4 PROGRAMMING
4
If the test is attempted while current is present, the setpoint will be forced to NORMAL MODE
and the following flash message will be displayed for 3 seconds.
If
6 7(67,1*? &855(17 6,08/$7,21?6,08/$7,21 is 21, the setpoint will be forced to NORMAL
MODE and the following flash message will be displayed for 3 seconds.
If testing is attempted via the serial port while phase or ground current is present or simulation
mode is on, an error code will be returned.
While the
23(5$7,217(67 setpoint is displayed, use the or key to scroll to the
desired output relay and/or status indicator to be tested. As long as the test message remains
displayed the respective output relay and/or status indicator will be forced to remain energized.
As soon as a new message is selected, the respective output relay and/or status indicator return
to normal operation.
As a safeguard, relay and LED test will turn off automatically if:
• power to the 239 is turned off and on
• phase or ground current is detected by the 239
• current simulation is turned on
• new message is displayed
c) CURRENT SIMULATION
Simulated currents can be forced instead of the actual currents sensed by the external CTs con-
nected to the 239. This allows verification of all current related relay functions such as timed over-
load trip. It also allows verification that external trip and alarm wiring is responding correctly.
• SIMULATION: Enter the required simulation phase and ground currents in the following mes-
sages. Enter ON to switch from actual currents to the programmed simulated values. This com-
mand will be ignored if real phase or ground current is present. Set this setpoint
2)) after
simulation is complete. As a safeguard, simulation will automatically turn off if:
• real phase or ground current is detected while in simulation mode
• power to the 239 is turned off and on
• time programmed in the
67(67,1*?&855(176,08/$7,21?6,0 8/$7,21 (1$%/(')25 setpoint
has elapsed since simulation was first enabled
• 239 is tripped
When current simulation is turned on the following flash message will be displayed for 3 seconds.
When current simulation is turned off the following flash message will be displayed for 3 seconds.
RELAY TEST BLOCKED
CURRENT PRESENT
RELAY TEST BLOCKED
AMPS SIMULATION ON
SIMULATION
HAS BEEN ENABLED
CURRENT SIMULATION
HAS BEEN DISABLED
VALUE ▲ VALUE ▼