GE 239

4-40 239 Motor Protection Relay GE Multilin
4 PROGRAMMING 4 PROGRAMMING
4
• PHASE A/B/C CURRENT: Enter the desired phase current for simulation. For example, to verify
operation of the unbalance function, turn the unbalance function trip on, set
6 3527(&7,21?3+$6(
&855(17?81%$/$1&(?3+$6( 81%$/$1&( 75,3 3,&.83
to , and set 63527(&7,21?3+$6(&855(17?
81%$/$1&(?3+$6(81%$/$1&($/$50
to 2)). Enter the following simulation values, assuming 6
6<67(06(783?02725'$7$?02725)8///2$'
is set to $, to create an unbalance of 27%:
I
a
= 100 A
I
b
= 52 A
I
c
= 85 A
Now set
67(67,1*?&855(176,08/$7,21?6,08/$7,2121. The relay will see this simulated current
in all 3 phases instead of the actual input current. The 239 should trip after a time determined by
63527(&7,21?3+$6(&855(17?81%$/$1&(?3+$6(81%$/$1&('(/$< setpoint. Set 6 7(67,1*?&85
5(176,08/$7,21?6, 08/$7,2 12))
after testing is complete.
• GROUND CURRENT: Enter the ground current for simulation of a ground fault. Then set
6
7(67,1*?&855(176,08/$7,21?6,08/$7,2121
to see the effect of this current.
• SIMULATION ENABLED FOR: Select the desired length of time that simulation will be enabled.
When the programmed time has elapsed, current simulation will turn off. If
81/,0,7(' is selected,
simulated current will be used until one of the above mentioned conditions is met.
d) ANALOG OUTPUT SIMULATION
• SIMULATION: Enter ON to switch from actual analog output to the programmed simulation
value. Set this setpoint to OFF after simulation is complete. As a safeguard, simulation will auto-
matically turn off if:
• power to the 239 is turned off and on
• time programmed in the
6 7(67,1*?$1$/2* 287387 6,08/$7,21?6,08/$7,21 (1$%/('
)25
setpoint has elapsed since simulation was first enabled
When analog output simulation is turned on the following flash message will be displayed for 3 sec-
onds.
When analog output simulation is turned off the following flash message will be displayed for 3
seconds.
• ANALOG OUTPUT FORCED TO: Enter in percent the analog output value to be simulated.
Whether the output is 0-1mA, 0-20mA or 4-20mA is dependent upon the selection in
6 
6(783$1$/2*287387$1$/2*2873875$1*(
.
EXAMPLE:
Alter the setpoints below as shown:
66(783$1$/2*287387$1$/2*2873875$1*(0$
67(67,1*$1$/2*2873876,08/$7,21$1$/2*287387)25&('72
67(67,1*$1$/2*2873876,08/$7,216,08/$7,2121
SIMULATION
HAS BEEN ENABLED
ANALOG OUT SIMULATION
HAS BEEN DISABLED