TM 9-6115-668-13
1.14.3.2 Emergency Shutdown.
If the EMERGENCY switch in the ECS is actuated in BATTLE SHORT mode, 0 V is applied to K12, A2 through con-
tact C of PARALLEL OPERATION receptacle J9. Because N-C contact 61-62 of K11 opens, disconnecting K12, A1
from +24 V, auxiliary contactor K12 cannot energize and the interlock chain is interrupted. This means that the volt-
ages to control cabinet assembly receptacles L1 (OA), L2 (OB), L3 (OC) and N are not shut down.
1.14.4 Control Cabinet Assembly.
1.14.4.1 Maximum Current Monitoring for L1 (OA). L2 (OB) and L3 (OC).
Safety device N3 provides synchronization as well as monitoring of the voltage, frequency, and maximum current of
receptacles L1 (OA), L2 (OB) and L3 (OC) and reverse power. To perform these tasks, it consists of the Synchroniz-
ing Relay, Voltage Sensing Transformers, Voltage/Frequency Error Detection, and Overcurrent/Rev. Power Detection
boards.
Current transformers T5, T6, and 17 generate current-proportional voltages at resistors R5, R6, and R7 (figure FO-1).
The voltages are applied to N3 and J/JT/JS/JR. For example, if too high a current is flowing in the T5, T6, or T7
line, N3 triggers self-locking auxiliary contactor K21. N-C contact 31-32 of K21 opens, interrupting the interlock
chain of K14. Auxiliary contactor K14 and main contactor K1 de-energize. K1 shuts down voltages to control cabi-
net assembly receptacles L1 (OA), L2 (OB), L3 (OC) and N.
The OVERLOAD indicator lamp (H13) is connected to +Vreg through N-O contact 43-44 of K21, and lights up. The
alarm signal is applied to PARALLEL OPERATION receptacle J9, and is delivered through the EPP III to the ECS.
Once the fault has been remedied, the fault is canceled with the OVERLOAD illuminated pushbutton switch (S10).
K21 is reset, and lamp H13 goes out. If a Generator Set 150 kW is in operation, K1 can be turned back on.
1.14.4.2 indicator Lamp Brightness Adjustment.
The PANEL DIMMER (S16/R2) can be used to adjust the output voltage +Vreg of brightness regulator N5 (positive
controller) between a minimum and maximum value (figure FO-1). When the PANEL DIMMER is turned all the way to
the left, S16 is open and the three front panel lights H6 and meter lights P9, P10, and P11 receive no voltage. For
lamps H2 to H15, H8 to H10, H12 to H17, and H101 to H103, voltage +Vres is set to its minimum value. When S16 is
turned on, the three front panel lights H6 and the meter lights P9, P10, and P11 also receive voltage, and +Vreg can
be adjusted between its minimum and maximum values with R2.
1.14.4.3 Lamp Test.
When the LAMP TEST pushbutton switch is pushed, lamps H1, H8 to H17, and H101 to H103 are connected to
+Vreg
through a diode and S20, contact 23-24, and lamps H2 to H5 are connected through a diode and S20, con-
tact 13-14 to 0 V; they should all light up (figures FO-1 and FO-2). Lamp brightness can also be adjusted during
the LAMP TEST.
1.14.4.4 Reporting and Control Functions.
Table 1-5 lists reporting and control functions that are exchanged, through PARALLEL OPERATION receptacle
J9, with the second Generator Set 150 kW, EPP III, ECS, and Commercial Power Converter. Contacts V, W, a,
b, c, d, e, and f of J9 are unoccupied (figure FO-1).
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