SUPPORT 4W9655 - Caterpillar

Protective Relaying Programming
OP5-1 is the option for the programming of the protective relaying setpoints. When one or more of the protective relay functions occur, the protective relaying setpoints determine the response of the GSC+. The GSC+ provides the protective relaying function in order to reduce the possibility of damage to the generator. The protective relaying functions are used in order to reduce the possibility of damage to the customer equipment. The setpoints are programmed in the GSC+ at the factory to the default values. The setpoints may be changed in order to satisfy the requirements of the customer. The setpoints are from P101 to P142 and the setpoints are programmable. Each of the setpoints is described in Table 1.Procedure For Protective Relaying Programming
Note: Service Mode cannot be accessed when the engine control switch (ECS) is in the AUTO position.Note: An active shutdown fault is indicated by a FLASHING shutdown indicator. An active shutdown fault must be made inactive in order to access the service mode. To temporarily change a shutdown fault from an active shutdown fault to an inactive shutdown fault, the shutdown fault must no longer be occurring. The fault must be corrected. The ECS must be returned to the OFF/RESET position. If the jumper from terminal 6 to terminal 9 is not installed on the ECS, the GSC+ does not power up in OFF/RESET. Any active shutdown fault must be corrected before the service mode is entered.
Turn the ECS to the STOP position in order to shut down the engine. Enter service mode and enter the password. "OP 4" is showing on the lower display. For more information, see System Operation, "Password Entry OP3".
Press the "SCROLL UP" key two times. "OP5-1" is showing on the lower display.
Press the "SELECT" key once. "P101" is showing. "P101" is followed by the value of the setpoint.
Press the "SCROLL UP" key or the "SCROLL DOWN" key. The next setpoint is showing with the setpoint value. Repeat this step until the desired setpoint is showing.
Press the "SELECT" key. The value of the setpoint is flashing.
Press the "SCROLL UP" or the "SCROLL DOWN" key in order to adjust the value of the setpoint.Note: In order to rapidly scroll through a large range of values, press and hold the appropriate "SCROLL" key.
Press the "ENTER" key. The value of the setpoint stops flashing. Repeat steps 4, 5, 6 and 7 until all the desired setpoints are adjusted.
Press the "EXIT" key. "OP 1" is showing on the lower display.
Press the "EXIT" key. The display returns to normal mode.
Table 1
OP5-1 Setpoints (1) - Protective Relaying Programming    
Setpoint    Name    Description    Range Of Value    Factory Default    
P101     Overvoltage Alarm Enable     The GSC+ enables or disables the generator overvoltage alarm function.     0 - disabled
1 - enabled     1    
P102     Overvoltage Alarm Threshold     Voltage the GSC+ uses to issue an overvoltage alarm.     100 to 125% of nameplate voltage in increments of 1%     105%    
P103