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4 SETPOINTS
PATH: SETPOINTS MMMMMMM S7 TESTING MMM CURRENT SIMULATION
Simulated currents can be forced instead of the actual currents sensed by the MM3 CTs. This allows verifica-
tion of all current related relay functions such as timed overload trip. It also allows verification that external trip
and alarm wiring is responding correctly.
SIMULATION:
OFF
MESSAGE
SIMULATION ENABLED
MESSAGE
FOR:
15 min
PHASE A CURRENT
MESSAGE
0 A
PHASE B CURRENT:
MESSAGE
0 A
PHASE C CURRENT:
MESSAGE
0 A
GE Power Management
Range: ON, OFF
Enter the required simulation phase and ground currents in the following
messages. Enter ON to switch from actual currents to the programmed
simulated values. This command is ignored if real phase or ground
current is present. Set to OFF 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 MM3 is turned off and on
•
the S7: TESTING \ CURRENT SIMULATION \SIMULATION ENABLED FOR time
has elapsed since simulation was first enabled
•
MM3 is tripped
When SIMULATION is turned ON, the following flash message is displayed
for 3 seconds.
CURRENT SIMULATION
HAS BEEN ENABLED
When SIMULATION is turned OFF, the following flash message is displayed
for 3 seconds.
CURRENT SIMULATION
HAS BEEN DISABLED
Range: 5 to 300 min. or UNLIMITED; Step: 5
Select the desired length of time that simulation will be enabled. When
the programmed time has elapsed, current simulation will turn off. If
UNLIMITED is selected, simulated current will be used until one of the
above mentioned conditions is met.
Range: 0 to 65535 A; Step: 1
Enter the desired phase current for simulation. For example, to verify
operation of the unbalance function. Enter the following simulation values
assuming S2: MOTOR PROTECTION THERMAL \ FULL LOAD CURRENT: 100A to
create an unbalance of 40%.
•
I
= 100 A, I
= 80 A, I
a
b
Now set S7: TESTING \ CURRENT SIMULATION \ SIMULATION: ON. The relay
will see this simulated current in all 3 phases instead of the actual input
current. The MM3 should trip after a 5 second delay. Set S7: TESTING \
CURRENT SIMULATION \ SIMULATION: OFF after testing is complete.
Range: 0 to 65535 A; Step: 1
See description for PHASE A CURRENT above.
Range: 0 to 65535 A; Step: 1
See description for PHASE A CURRENT above.
MM3 Motor Manager 3
4.10.4 CURRENT SIMULATION
= 150 A
c
4.10 S7 TESTING
4
4-41
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