XQ Auto Paralleling Caterpillar

Manual Operation

The power module can be used as a single, stand-alone unit paralleled to the utility for base load operation. Manual operation refers the use of the circuit breaker switch to close the generator breaker manually. The following information describes the steps for manual operation.

1. Ensure that all load cable connections have been correctly made.

2. Verify that the unit can be safely started.

3. Verify that the unit can be that paralleled to the utility.

Pre-starting Procedures

The pre-startup procedures are to be performed by qualified personnel. Perform the following steps before the units are started.

1. Ensure that the GPC and the UMR paralleling controls are turned on.

2. Verify that the lead unit jumper is not installed on terminals 1UP-93 and 1UP-94 in the customer connection box. The unit will always parallel to a live source for base load operation.

3. Use the Caterpillar service tool to verify the Cat DVR configuration of the "load compensation mode" parameter. The "load compensation mode" parameter must be set to "DROOP".

4. Program the GPC configuration parameters as follows:
   • Reactive power load share to "OFF"

   • Power controller P set 1 is set to desired base load level (default is 1825 kW)

   • Power factor control set point is set to desired power factor level (default is i0.95)

   • Power controller Ramp (default is 10 kW/s) is set to desired (shared set point for soft load and for soft unload)

5. Verify that the on-board utility protective relay (UMR) configuration parameters are set for the requirements of the specific application at the site.

   Note: Refer to the information in the section for "Default Settings for Utility Multifunction Relay".

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Illustration 1	g02162323

6. Use the 2 position switch (22) in order to select either the potentiometer or the GPC set point control. The potentiometer or the GPC set point control are used for base load level reference.

   Note: Refer to the information that is in the "Base Load Potentiometer Settings" section for potentiometer settings and associated base load levels.

   Note: The GPC base load level is determined by the value of the "Power controller P set 1" GPC parameter.

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Illustration 2	g02162325

7. Install wiring from the "utility breaker auxiliary" contact to terminals UTB+ and UTB-.

8. If required, install wiring from the "utility transfer trip" dry contact to terminals B+ and UTXF.

Startup procedure

1. Press the "RUN" button that is on the EMCP 3.

   Note: The engine will start as soon as the "RUN" button is pressed.

2. Observe the generator voltage and frequency on the GPC screen after the generator is at the rated rpm. Observe the bus voltage and frequency on the GPC screen after the generator is at the rated rpm.

3. Use the operator controls to adjust the voltage if necessary.

   Note: The frequency is automatically controlled by the GPC.

4. Observe the linear LED synchroscope that is on the GPC. The generator is in sync with the bus if the green LED, that is in the center position, is lit. The breaker can be closed if the generator is in sync with the bus.

   Note: The linear LED synchroscope is for visual indication only in this mode of operation. Sync check is performed by the UMR relay.

5. Use the circuit breaker switch to close the generator breaker at the appropriate time. Rotate the handle clockwise until the breaker closes, then release the handle.

The unit is now operating in parallel with the utility. The unit will automatically ramp to the selected base load level. Observe the operation of the unit. Ensure that the unit is "soft loaded" to the desired base load level. Ensure the power factor (PF) remains consistent. Ensure that base load control remains consistent.

Adjustment of the base load level is allowed at any time. Base load level control can be set by the potentiometer or the GPC. Soft ramp occurs any time the control is switched from the potentiometer to the GPC or from the GPC to the potentiometer.

Shutdown procedure

1. Press the "STOP" button on the EMCP 3.

2. The generator will "soft unload" to 10 percent of the rated kW. The message, "Pre-cooldown", will be shown on the EMCP 3 display during "soft unload".

3. The generator breaker will then trip open.

4. The engine will continue to run in cool down mode until the cool down time has elapsed. The engine will shut down after the cool down time has elapsed.

Automatic Operation

The power module can be used as a single, stand-alone unit paralleled to the utility for base load operation. Automatic operation refers to the use of the on-board control system to close the generator breaker automatically. The following information describes the steps for automatic operation.

1. Ensure that all load cable connections have been correctly made.

2. Verify that the unit can be safely started.

3. Verify that the unit can be paralleled to the utility.

Pre-startup Procedures

The pre-startup procedures are to be performed by qualified personnel.

1. Ensure that the GPC and the UMR paralleling controls are turned on.

2. Verify that the lead unit jumper is not installed on terminals 1UP-93 and 1UP-94 in the customer connection box. The unit will always parallel to a live source for base load operation.

3. Use the Caterpillar service tool to verify the Cat DVR configuration of the "load compensation mode" parameter. The "load compensation mode" parameter must be set to "DROOP".

4. Program the GPC configuration parameters as follows:
   • Reactive power load share to "OFF"

   • Power controller P set 1 is set to desired base load level (default is 1825 kW)

   • Power factor control set point is set to desired power factor level (default is i0.95)

   • Power controller ramp (default is 10 kW/s) is set to desired (shared set point for soft load and for soft unload)

5. Verify that the on-board utility protective relay (UMR) configuration parameters are set for the requirements of the specific application at the site.

   Note: Refer to the information in the section for "Default Settings for Utility Multifunction Relay".

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Illustration 3	g02162323

6. Use the two position switch (22) in order to select either the potentiometer or the GPC set point control. The potentiometer or the GPC set point control are used for base load level reference.

   Note: Refer to the information that is in the "Base Load Potentiometer Settings" section for potentiometer settings and associated base load levels.

   Note: The GPC base load level is determined by the value of the "Power controller P set 1" GPC parameter.

7. Install wiring from the "utility breaker auxiliary" contact to terminals UTB+ and UTB-.

8. If required, install wiring from the "utility transfer trip" dry contact to terminals B+ and UTXF.

9. Press the "AUTO" button that is on the EMCP 3.

Startup Procedure

1. The engine will begin starting by either of two methods.

   1. The engine can start if the remote run request contact is closed that is wired to each unit.

   2. The engine can start if the local start/stop switch is placed in the ON position, one unit at a time, beginning with the lead unit.

2. After the unit is running at rated speed, then the generator will automatically synchronize and parallel to the utility.

   Note: If the lead unit takes too long (default is 45 seconds) to close the breaker, the "fail-to-parallel" timer (FPT) will cause a shutdown.

The unit is now operating in parallel with the utility. The unit will automatically ramp to the selected base load level. Observe the operation of the unit. Ensure that the unit is "soft loaded" to the desired base load level. Ensure the power factor (PF) remains consistent. Ensure that base load control remains consistent.

Adjustment of the base load level is allowed at any time. Base load level control can be from the potentiometer or the GPC. Soft ramp occurs any time the control is switched from the potentiometer to the GPC or from the GPC to the potentiometer.

Shutdown Procedure

1. Any of the methods below will initiate a normal shutdown.

   1. If a remote run request contact is used to start the generator set, then open the remote run request contact.

   2. If a local start switch is used, then switch the local start/stop switch to the OFF position at each unit.

   3. If either a local or a remote start is used, then press the "STOP" button that is on the EMCP 3 control at each unit.

2. The generator will "soft unload" to 10 percent of the rated kW. The message, "Pre-cooldown", will be shown on the EMCP 3 display during "soft unload".

3. The generator breaker will then trip open.

4. The engine will continue to run in cool down mode until the cool down time has elapsed. The engine will shut down after the cool down time has elapsed.