9287500991 Rev K DECS-100 Introduction i
INTRODUCTION
This instruction manual provides information about the operation and installation of the DECS-100 Digital
Excitation Control System. To accomplish this, the following information is provided:
General Information and Specifications
Controls and Indicators
Functio nal Description
Ins tallation
Maintenance and Troubleshooting
WARNING!
To avoid person al injury o r equipment damage, only qualified person nel should
perform the procedures in this manual.
Lethal voltage is present at the rear panel when the unit is energized. Rear panel
connections should be made only when the unit id de-energized.
NOTE
Be sure that the DECS-100 is hard-wired to earth ground with no smaller than 12
AWG copper wire atta ched to the grou nd terminal o n the rea r of the unit ca se.
When the DECS-10 0 is configu red in a system with other device s, it is
recommended to use a separate lead to the ground bus from each unit.
CAUTION
The Man ual mode excit ation level must be eva luated pri or to enabling t his
feature. If the level of excitation cu rrent is inappropriate for the generator, severe
damage to the generator may occur.
Improper PID numbers will result in poor system performance or system damage.
When ap plying ope rating power for programming purposes, o bserve th e pre-
cautions called out in Section 4, Installation, Preliminary Setup.
When p rogramming th e DECS -100 wit hout th e gen erator spin ning, t he
connections to DECS-100 terminals F+ and F– should be removed.
Before uploading a settings file, remove ope rating power f rom t he DECS-100,
disconnect the field wirin g from termin als F+ a nd F–, and re -apply operatin g
power to the DECS-100.
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