COLLAR-TRACK ROLLER 4359430 - Caterpillar

Integrated Voltage Regulator (IVR)
The IVR is a function in the EMCP 4 that controls the generator voltage, optimizes transient performance, and provides feature specification.IVR may control any of the following excitation systems: Self Excitation (SE), Internal Excitation (IE) and Permanent Magnet (PMG) excitation systems.For more information about IVR, see Application and Installation, LEBE0006 and Application and Installation, LEBE0007.EM 10 Excitation Module
Illustration 1 g03457036The EM 10 excitation module provides excitation current to the generator, and is controlled by the IVR function in the EMCP 4 controls.Over-excitation Protection
Illustration 2 g03457278
If a short-circuit fault occurs at the generator terminals, the EM 10 will allow the excitation current to rise to the upper limit value set by the adjustment potentiometer (maximum 10 Amps).
The excitation current will be clamped at the upper limit value for 10 seconds (fixed internally).
After 10 seconds, the excitation current is reduced to a value of 10% of the potentiometer setting.For more information about EM 10, contact your Cat dealer.