emcp 4.1, 4.2 generator set control

Application and Installation Guide EMCP 4.1, 4.2 Generator Set Control

Figure 68: Excitation Module Over- Excitation Protection Strategy

The Excitation Limit Potentiometer on the Excitation Module has 270 degrees of rotation and is used to configure the Excitation Current Upper Limit as shown in Figure 69. Keep in mind that this must be set for maximum forcing current, and not nominal excitation current.

Minimum Position

Maximum Position

EM10

4 Amps

10 Amps

EM15

6 Amps

15 Amps

Figure 69: Maximum and Minimum Limits of Excitation Current Limit Potentiometer

IVR EXCITATION MODULE FUSING

The EM10 has internal fusing, therefore it is not necessary to fit external fuses on the excitation power supply inputs.

The EM15 requires external fusing to be fitted on inputs X1 and Z2. The recommended fuse for UL listed gensets is a Bussman KTK-10 (Cat part number 6V7802). For non-UL listed gensets an alternative fuse of Bussman AGC-10RX (Cat part number 3K8782) may also be used.

Connection diagrams showing the location of external fusing on the EM15 are provided in Appendix C.

©2013 Caterpillar

All rights reserved. Page 235

EMCP 4.1, 4.2 Generator Set Control Application and Installation Guide

19.3 IVR SOFTWARE CONFIGURATION

The Integrated Voltage Regulator parameters can be accessed using either the CAT ET

Service tool, or directly through the EMCP display. Some setpoints are locked at ET only or at Security Level 3 and cannot be changed from the EMCP display or will require a level 3 password. Please note that ET Service Tool version 2012C or later is recommended for accessing and adjusting IVR parameters.

To access the Integrated Voltage Regulator setpoints using the ET Service Tool, connect to the EMCP Genset Control and click on the ‘Configuration Tool’ button

(alternatively press F5) to enter the configuration menu. Select ‘Integrated Voltage

Regulator’ from the menu on the left and set Voltage Regulator Control Source

Configuration equal to ‘Genset Control’ to display the following default settings:

To access the Integrated Voltage Regulator setpoints through the EMCP display, navigate to the following sub-menu:

MAIN MENU

 CONFIGURE

 ALL SETPOINTS

 VOLTAGE REGULATOR

If replacing a CDVR with IVR, the parameters can be programmed the same as the

CDVR (using ET scaling) in order to achieve similar performance.

If the IVR is a new installation, or a R450 or VR6 voltage regulator is being replaced, the parameters can be programmed to the default values with a low loop gain starting in the region

1.0%-5.0%. Note that the default parameters should provide stable voltage control for most generator sets, however some optimization and tuning may be required to achieve the desired performance. The following subsections provide further detail on each individual setpoint, including range, resolution and default values.

Page 236 All rights reserved.