Limiters ...................................................................................................................................................... 55

Overexcitation Limiter .............................................................................................................................. 55

Underexcitation Limiter ............................................................................................................................ 59

Stator Current Limiter .............................................................................................................................. 61

Var Limiter ............................................................................................................................................... 62

Limiter Scaling ......................................................................................................................................... 63

Underfrequency Limiter ........................................................................................................................... 63

Metering ..................................................................................................................................................... 67

Metering Explorer .................................................................................................................................... 67

Metered Parameters ................................................................................................................................ 68

Status Indication ...................................................................................................................................... 74

Auto Export Metering ............................................................................................................................... 82

Event Recorder .......................................................................................................................................... 83

Sequence-of-Events Recording .............................................................................................................. 83

Data Logging ........................................................................................................................................... 83

Trending .................................................................................................................................................. 87

Power System Stabilizer ........................................................................................................................... 89

Supervisory Function and Setting Groups............................................................................................... 89

Theory of Operation ................................................................................................................................. 89

Stability Tuning ......................................................................................................................................... 99

AVR Mode ............................................................................................................................................... 99

FCR and FVR Modes ............................................................................................................................ 103

Other Modes and Functions .................................................................................................................. 104

Mounting .................................................................................................................................................. 107

Mounting Considerations ....................................................................................................................... 107

Projection Mounting ............................................................................................................................... 107

Behind-the-Panel Mounting ................................................................................................................... 107

Terminals and Connectors ..................................................................................................................... 111

Overview ................................................................................................................................................ 111

Terminal Types ...................................................................................................................................... 115

Typical Connections ............................................................................................................................... 117

BESTCOMSPlus

General Description ............................................................................................................................... 121

Installation ............................................................................................................................................. 122

Activation of the DECS-250 Plugin for BESTCOMSPlus

Menu Bars ............................................................................................................................................. 126

Settings Explorer ................................................................................................................................... 128

Metering Explorer .................................................................................................................................. 129

Settings File Management ..................................................................................................................... 129

Automatic Metering Export .................................................................................................................... 131

Firmware Updates ................................................................................................................................. 132

BESTCOMSPlus

BESTlogic™Plus ..................................................................................................................................... 137

Introduction ............................................................................................................................................ 137

Overview of BESTlogic™Plus ............................................................................................................... 137

Logic Schemes ...................................................................................................................................... 151

Programming BESTlogic™Plus ............................................................................................................ 156

BESTlogic™Plus File Management ...................................................................................................... 158

BESTlogic™Plus Examples .................................................................................................................. 159

Communication ....................................................................................................................................... 161

Local Communication ............................................................................................................................ 161

Communication with a Second DECS ................................................................................................... 161

Modbus™ Communication ..................................................................................................................... 162

Preface

CALL US TODAY

1-888-POWER-58

Software ..................................................................................................................... 121

Updates .................................................................................................................... 135

parts@genpowerusa.com

..................................................................... 122

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