Basler Electric DECS-100 User Manual

INSTRUCTION MANUA L

FOR

DIGITAL EXCITATIO N CONTROL SYSTEM

DECS-100

Publication: 9287500991 Revision: M 02/15

INTRODUCTION

This instruction manual provides information about the operation and installation of the DECS-100 Digital Excitation Control System. To accomplish this, the following informati on is provid ed:

• General Information and Specifications

• Controls and Indicators

• Functional Description

• Installation

• Maintenance and Troubleshooting

WARNING!

To avoid personal inj ury or equipment damage, only qualified personnel should perform the procedures in this manual.

Lethal voltage is present at the rear pan el when t he u nit is ener gized. Rear pane l connections should be made only when the unit is de-energized.

CAUTION

The Manual mode excitation level must be evaluated prior to enabling this feature. If the level of excit ation current is inappr opriat e for the gener ator, sev ere damage to the generator may occur.

Improper PID numbers will result in poor system performance or system damage. When applying operating power for programming purposes, observe the pre-

cautions called out in Section 4, Installation, Preliminary Setup. When programming the DECS-100 without the generator spinning, the

connections to DECS-100 terminals F+ and F– should be removed. Before uploading a settings file, remove operating power from the DECS-100,

disconnect the field wiring from terminals F+ and F–, and re-apply operating power to the DECS-100.

NOTE

Be sure that the DECS-100 is hard-wired to ear th gro und wit h no sma ller than 1 2 AWG copper wire attache d to the ground terminal on the rear of the unit case. When the DECS-100 is configured in a system with other devices, it is recommended to use a separate lead to the ground bus from each unit.

9287500991 Rev M DECS-100 Introduction i

First Printing: March 2001

Printed in USA

CONFIDENTIAL INFORMATION

of Basler Electric, Highland Illinois, USA. It is loaned for confidential use, subject to return on request, and with the mutual understanding that it will not be used in any manner detrimental to the interest of Basler Electric.

It is not the intent ion of th is manual to cover a ll detai ls and variat ions in eq uipment, n or does this manu al provide data for every pos s ible c ont ing enc y regar di ng i ns tal lat ion or o per at ion . Th e av ai lab ility and des ign of all features and options are subject to modification without notice. Should further information be required, contact Basler Electric. For terms of service relati ng to this product and software, see the Commercial Ter ms of Products and Services document available at www.basler.com/terms.

BASLER ELECTRIC

12570 STATE ROUTE 143

HIGHLAND IL 62249-1074 USA

http://www.basler.com, info@basler.com

PHONE +1 618.654.2341 FAX +1 618.654.2351

ii DECS-100 Introduction 9287500991 Rev M

REVISION HISTORY

Hardware

Version and Date

Change

E, 01/01

• Initial release

F, 05/01

• Deepened potting shell

G, 10/01

• Began supplying mou nti ng s c rew s

H, 02/02

• SIL-PADS were added between power components and the heat sinks Added manufactur i ng origin to the rear label

J, 07/02

• Revised EEPROM

K, 02/03

• Replaced transistor Q8B1 with an improved part

L, 03/03

• Incremental improv em ents to firmw are and B ESTCOMS™

M, 01/04

• Improved flash memory retention

N, 05/05

• Redesigned current transformer

• Enhanced EMI/RF I im mun it y

• Version letter O not used

P, 08/06

• Updated CD-ROM supplied with unit to include English and French

language instruction manuals

• Version letter Q not used

R, 04/07

• Resolved UEL issue with firmware modification

S, 05/07

• Provided German language manual on CD-ROM supplied with DECS-100

T, 07/07

• Released firmware version 2.13.XX

U, 01/08

• Improved power amplifier circuitry with more robust components

V, 03/08

• Added Setpoint Auto Save feature

W, 03/09

• Released BESTCO M S vers ion 1.0 8.X X.

X, 02/10

• Added enhancement for production testing.

Firmware

Version and Date

Change

1.09.XX, 01/01

• Initial release

1.11.XX, 07/01

• Enabled the protection function during the first 5 seconds of operation

• Established minimum voltage regulation at 30% of nominal sensing voltage

1.12.XX, 03/02

• Added register to detect CT type

2.13.XX, 07/07

• Added underexcitation limiting

• Added bus voltage matching provisions

2.14.XX, 03/08

• Added Setpoint Auto Sav e sett ing

2.14.XX, 04/14

• Maintenance release

BESTCOMS for

Version and Date

Change

1.02.XX, 02/01

• Initial Release

1.03.XX, 08/01

• Changed OEL scale from 100 to 1,000 to match the change in firmware

• Changed the default for all protection functions to enabled

The following information provides a historical summary of the changes made to the DECS-100 hardware, firmware, and software. Th e corresponding revisions made to this i nstruction manual (9287500991) ar e also summarized. Revisions are listed in chronological order.

•

• Added front panel Underexcitation Limiting indicator

• Modified the OEL setpoint scale factor to be compatible with BESTCOMS

version 1.03.XX

• Added the scale factor for per-unit gain

• Added takeover-style excitation limiting

Windows® OS

version 1.11.01

• Changed OEL default setting from 1 to 15

9287500991 Rev M DECS-100 Introduction iii

BESTCOMS for

Windows® OS

Version and Date

Change

• Add support for French regional settings

1.04.XX, 04/02

• Made BESTCOMS compatible with older firmware versions

• Changed minimum Ki setpoint from 0 to 0.01

1.05.XX, 05/05

• Added underexcitation limiting capability

• Added provisions for bus voltage matching

1.06.XX, 11/07

• Added compatibility with Microsoft® Vista to BESTCOMS

1.07.XX, 03/08

• Added Setpoint Auto Sav e sett ing.

1.08.XX, 03/09

• Improved comm un icati ons with DEC S-100.

1.09.XX, 01/11

• Added Windows® 7 compatibility and improved field overvoltage shutdown.

1.09.XX, 04/14

• Added Windows® 8 compatibility

BESTCOMS for

Version and Date

Change

1.01.XX, 01/01

• Initial Release

1.02.XX, 08/01

• Added a Check for New Ve r sion button to the Contac t Basler screen

• Added version checking

1.03.XX, 04/02

• Added password protection

• Improved version checking function

NOTE

• BESTCOMS for Palm OS is compatible only with firmware versions

1.12.XX and earlier

Manual

Revision and Date

Change

—, 03/01

• Initial release

A, 03/01

• In Section 5, BESTCOMS Software for the Windows® Operating System

utility for the DECS-100 CD-ROM

B, 08/01

• Added Embedded Software subsection to Section 5, BEST COMS Software

• Corrected various minor errors throughout manual

C, 05/02

• Revised the torque specification for the mounting screws supplied with unit

illustrations were revised to accommodate software enhancements

D, 01/03

• Revised Voltage Matching Time Adjustment Range from 0 to 300 seconds

• Corrected figure number references in Sections 5 and 6

E, 03/04

• Added Operating Power Considerations During DECS-100 Programm ing to

• Corrected CT ratio setting range stated in Section 5

Palm® OS

• Added support for all regional settings

• Enabled reading of secondary CT value for units with firmware version

1.12.01 and higher

• Simplified the Analy s is scr een

• Added feature to calculate and send voltage matching reference for

different generator and bus PT ratios

• Added ability to select either summing point or takeover style OEL

• Added a date/time stamp to the “Save to File” names

and Section 6, BESTCOMS Software for the Palm OS® Platform, Step 2 of Installing BESTCOMS was revised to reflect the addition of an auto-start

for the Windows® Operating System

• In Section 5, BESTCOMS Software for the Windows® Operating System and Section 6, BESTCOMS Software for the Palm® OS Platform, text and

to 1 to 300 seconds throughout manual

Section 4, Installation, Preliminary Setup

• Added caution box regarding application of operating power during DECS100 programming to Section 5, BESTCOMS for Windows® OS and

iv DECS-100 Introduction 9287500991 Rev M

Section 6, BESTCOMS for Palm OS®

Manual

Revision and Date

Change

F, 05/05

• Added material covering added UEL capability

• Revised all drawings to show new front panel with UEL indicator

• Added troubleshooting procedure for a UEL annunciation

G, 03/07

• Corrected illustration and des c riptio ns of BESTCO M S Meter ing, Operation

• Removed expired patent information

H, 05/08

• Added DNV compliance statement to manual specifications

• Added description of BESTCO MS Set poi nt Aut o Save featur e

J, 10/08

• Revised the setting ranges of control gain settings OEL KI, OEL Kg, BESTCOMS version 1.07.01.

K, 05/11

• Revised Introduction to reflect new epoxy-potted package.

• Corrected various minor errors throughout manual

L, 07/13

• Section 1: Added maritime agency recognition.

capacitors while in storage.

M, 02/15

• Added UL recognition for UL6200.

• Minor text edits.

• Updated all illustrations of rear panel to show revised CT

• Added discussion of summing point and takeover style OEL limiting

• Revised voltage matching description to cover Maintain and Revert modes

• Corrected the hole drilling diameter shown in Figure 4-2

• Added illustration/description for using the ICRM-7 with the DECS-100

• Removed Section 6, BESTCOMS Software for the Palm® OS Platform and

moved Maintenance and Troubleshooting to Section 6

and Alarms screen, Operation tab

UEL KI, and UEL Kg from 0–1,000 to 0–300 to reflect changes made in

• Removed “(optional feature)” from note 5 of Figures 4-7 to 4-10, due to the setpoint option now being standard.

• Added storage / electrolytic capacitors procedure to Section 6.

• Section 1: Added Power Dissipation to specifications.

• Section 4: Added maritime agency conditions of acceptability.

• Section 4: Added note box r egardi ng 24 Vdc operat ing power bei ng us ed

for programming the DECS-100.

• Section 5: Added caution box regarding PID calculations and instruction to allow 5 seconds after sending settings or firmware to the DECS-100.

• Section 5: Added description for Derivative Gain TD.

• Section 6: Added energizing procedure for maintaining electrolytic

• Added EAC certification.

• Added ferrite clamp recommendations for CE compliant installation.

9287500991 Rev M DECS-100 Introduction v

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vi DECS-100 Introduction 9287500991 Rev M

A detailed table of contents is provided at the start of each manual section. The manual sections are ordered as follows.

SECTION 1 • GENERAL INFORMATION ................................................................................................. 1-1

SECTION 2 • HUMAN-MACHINE INTERFACE ........................................................................................ 2-1

SECTION 3 • FUNCTIONAL DESCRIPTION ............................................................................................ 3-1

SECTION 4 • INSTALLATION ................................................................................................................... 4-1

SECTION 5 • BESTCOMS™ SOFTWARE ............................................................................................... 5-1

SECTION 6 • MAINTENANCE AND TROUBLESHOOTING .................................................................... 6-1

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viii DECS-100 Introduction 9287500991 Rev M

SECTION 1 • GENERAL INFO RMATION

TABLE OF CONTENTS

SECTION 1 • GENERAL INFORMATION ................................................................................................ 1-1

INTRODUCTION.................................................................................................................................... 1-1

FEATURES ............................................................................................................................................ 1-1

Model and STYLE NUMBERs ............................................................................................................... 1-1

Style Number ...................................................................................................................................... 1-1

SPECIFICATIONS ................................................................................................................................. 1-2

Operating Power ................................................................................................................................ 1-2

Generator Voltage Sensing ................................................................................................................ 1-2

Generator Current Sensing ................................................................................................................ 1-2

Bus Voltage Sensing (Optional) ......................................................................................................... 1-2

Accessory Input .................................................................................................................................. 1-3

Communication Port ........................................................................................................................... 1-3

Contact Input Circuits ......................................................................................................................... 1-3

Common Alarm Output ....................................................................................................................... 1-3

Field Output ........................................................................................................................................ 1-3

AVR Operating Mode ......................................................................................................................... 1-3

FCR (Manual) Operating Mode .......................................................................................................... 1-4

Var Operating Mode (Optional) .......................................................................................................... 1-4

PF Operating Mode (Optional) ........................................................................................................... 1-4

Parallel Compensation ....................................................................................................................... 1-4

Field Overvoltage Protection .............................................................................................................. 1-4

Generator Overvoltage Protection ..................................................................................................... 1-4

Overexcitation Limiter ......................................................................................................................... 1-5

Underexcitation Limiter ....................................................................................................................... 1-5

Soft Start Function (AVR Mode Only) ................................................................................................ 1-5

Voltage Matching ................................................................................................................................ 1-5

Metering (BESTCOMS™) .................................................................................................................. 1-5

Environment ....................................................................................................................................... 1-6

Type Tests .......................................................................................................................................... 1-6

Physical .............................................................................................................................................. 1-6

Maritime Recognition .......................................................................................................................... 1-6

EAC Mark (Eurasian Conformity) ....................................................................................................... 1-6

UL Recognized Component ............................................................................................................... 1-6

CE Compliance .................................................................................................................................. 1-6

Figures

Figure 1-1. DECS-100 Style Chart ................................

Figure 1-2. Typical V/Hz Curves ................................................................................................................ 1-4

9287500991 Rev M DECS-100 General Information i

............................................................................ 1-1

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ii DECS-100 General Information 9287500991 Rev M

SECTION 1 • GENERAL INFOR MATION

INTRODUCTION

The Basler Digital Excitation Control System (DECS-100) is an electronic, solid-state, microprocessor based control device. The DECS-100 regulates the output voltage of a brushless, ac generator by controlling the current int o the generator ex citer field. Input power to the DECS-100 can be from a mul tipole, high-frequency , permanent magnet ge nerator (PMG) or from t he generator outp ut when used as a conventional, shunt-excited, excitation system.

The DECS-100 is supplied in an epoxy-potted package designed for behind-the-panel mounting. The DECS-100 is held in place by thread-forming screws that thread into its plastic shell. Front panel indicators (LEDs) annunc iate DEC S-100 status and system c onditions. D ECS-100 c onnections ar e made through quarter-inch, q uick-connect terminals on the r ear panel. A 9-p in DB-9 type conn ector on the rear panel provides communication between the DECS-100 and an IBM compatible PC.

FEATURES

DECS-100 units have the following features and capabilities:

• Four control modes: automatic voltage regulation (AVR), manual or field current regulation (FCR), power factor (PF) regulation, and reactive power (var) regulation.

• Programmable stability settings.

• Soft start and voltage buildup control with an adjustable ramp in AVR control mode.

• Overexcitation limiting (OEL) and underexcitation limiting (UEL) in AVR, Var, and PF control modes.

• Underfrequency (volts/hertz) regulation.

• Three-phase or single-phase generator voltage (rms) sensing/regulation in AVR mode.

• Single-phase bus voltage (rms) sensing.

• Single-phase generator current sensing for metering and regulation purposes.

• Field current and field voltage sensing.

• One analog input for proportional remote control of the setpoint.

• Five contact sensing inputs for system interface.

• One common output relay for alarm indication and trip functions.

• Three protection functions: field overvoltage, generator overvoltage, and loss of sensing.

• Generator paralleling with reactive droop compensation and reactive differential compensation.

• Rear RS-232 communication port for personal computer communication using BESTCOMS™

Windows® based software for fast, user-friendly, setup and control.

MODEL AND STYLE NUMBERS

The model number, together w ith the style number, describes the options included in a specific device, and appear on a label affixed to the r ear panel. Upon receipt of a DEC S-100, be sur e to check the style number against the requisition and the packing list to ensure that they agree.

Style Number

DECS-100 electrical c haracteristics and oper ational features are defi ned by a combination of let ters and numbers that make up the style number. The DECS-100 style number chart is shown in Figure 1-1.

Figure 1-1. DECS-100 Style Chart

9287500991 Rev M DECS-100 General Information 1-1

Style Number Example

For example, a DECS-100 with a style number of A15 would have the following characteristics and operating features.

A ------- No var or power factor control 1 -------- Voltage matching 5 -------- 5 ampere current sensing

SPECIFICATIONS

DECS-100 specifications and qualifications are listed in the following paragraphs.

Operating Power

Refer to Section 4, Installation for special requirements concerning the application of operating power during DECS-100 programming and the application of station power.

Voltage: 88 to 250 Vac, single-phase or three-phase (L-L) Frequency: 50 to 400 Hz Power Dissipation: 40 W (maximum continuous) Burden: 650 VA Voltage Buildup: ≥6 Vac Terminals: 3, 4, 5

Generator Voltage Sensing

Type: 1-Phase/3-Phase, 4 ranges Burden: <1 VA per phase Terminals: E1, E2, E3

50 Hertz Sensing

Range 1: 100 Vac (85 to 132 Vac) Range 2: 200 Vac (190 to 220 Vac) Range 3: 400 Vac (380 to 440 Vac) Range 4: N/A

60 Hertz Sensing

Range 1: 120 Vac (85 to 132 Vac) Range 2: 240 Vac (170 to 264 Vac) Range 3: 480 Vac (340 to 528 Vac) Range 4: 600 Vac (540 to 660 Vac)

Generator Current Sensing

Type: 1-phase (B-phase), 50/60 Hz Style XX1: 1 Aac maximum continuous Style XX5: 5 Aac maximum continuous Burden: <0.1 VA Terminals: CT1, CT2

Bus Voltage Sensing (Optional)

Type: 1-phase, 4 ranges Burden: <1 VA per phase Terminals: B1, B3

50 Hertz Sensing

Range 1: 100 Vac (85 to 132 Vac) Range 2: 200 Vac (190 to 220 Vac) Range 3: 400 Vac (380 to 440 Vac) Range 4: N/A

60 Hertz Sensing

Range 1: 120 Vac (85 to 132 Vac) Range 2: 240 Vac (170 to 264 Vac) Range 3: 480 Vac (340 to 528 Vac) Range 4: 600 Vac (540 to 660 Vac)

1-2 DECS-100 General Information 9287500991 Rev M

Accessory Input

Voltage Range: –3 Vdc to +3 Vdc Setpoint Range: –30% to +30% shift Burden: 1 kΩ Terminals: A, B

Communication Port

Interface: Full duplex RS-232 Connection: Rear panel DB-9 connector Baud: 4800 Data Bits: 8 Parity: None Stop Bit: 1

Contact Input Circuits

Type: Dry contacts Interrogation Voltage: 13 Vdc (supplied by DECS-100)

Terminal Assignments for Standard Functions

Raise: 6U, 7 Lower: 6D, 7 Var/PF Enable: 52J, 52K Parallel Control: 52L, 52M Voltage Matching: VM, VMC

Common Alarm Output

Type: Form A Rated Load: 7 Aac/Adc continuous Make: 30 Aac/Adc, carry for 0.2 sec Break: 7 Aac/0.1 Adc Operating Voltage: 240 Vac/250 Vdc maximum Terminals: AL1, AL2

Field Output

Continuous Rating: 63 Vdc, 7 Adc Field Resistance: 9 Ω minimum Terminals: F+, F–

10 Second Forcing Rating

200 Vac Power Input: 135 Vdc, 15 Adc 110 Vac Power Input: 90 Vdc, 10 Adc (9Ω field) 75 Vdc, 15 Adc (5Ω field)

AVR Operating Mode

Adjustment Range: See Generator Voltage Sensing Voltage Regulation: ±0.25% over load range at rated power factor and constant generator

frequency.

±0.5% with 3-phase sensing and shunt power at 40% THD of the voltage

waveform (due to a six SCR load). Temperature Drift: ±0.5% for a 40°C change V/Hz Characteri stic: Slope from 0 to 3PU is adjustable in 0.01PU increments. Transition

(Corner) frequency is adjustable from 40 to 65 Hz. See Figure 1-2 for the

V/Hz curves. Response Time: Within 1 cycle

9287500991 Rev M DECS-100 General Information 1-3

Figure 1-2. Typical V/Hz Curves

FCR (Manual) Operating Mode

Adjustment Range: 0 to 7 Adc Increment: 0.01 Adc

Var Operating Mode (Optional)

Adjustment Range: –100 to 100% Increment: 0.1%

PF Operating Mode (Optional)

Adjustment Range: 0.6 lag to 0.6 lead Increment: 0.001

Parallel Compensation

Modes: Reactive Droop and Reactive Differential (cross-current)∗ Droop Adjust Range: 0 to 10% Increment: 1%

∗ Burden can exceed 1 VA if external resistors are added to the CT circuit.

Field Overvoltage Protection

Pickup Range: 0 to 250 Vdc Time Delay: 10 s (fixed)

Generator Overvoltage Protection

Pickup

Range: 100 to 120% of system voltage setting Increment: 1.0%

Alarm Time Delay

Range: 0 to 10 s Increment: 1 s

1-4 DECS-100 General Information 9287500991 Rev M

Overexcitation Limiter

Pickup

Range: 0 to 15 Adc Increment: 0.001 Adc

Alarm Time Delay

Range: 0 to 10 s Increment: 1 s

Underexcitation Limiter

Pickup

Range: 0 to 100% of rated vars Increment: 1%

Alarm Time Delay

Range: 0 to 10 s Increment: 1 s

Soft Start Function (AVR Mode Only)

Time Adjust Range: 1 to 7,200 s Increment: 1 s

Voltage Matching

Accuracy: Generator rms voltage is matched with the bus rms voltage to within

±0.5% of the generator voltage.

Time Adjustment

Range: 1 to 300 s Increment: 0.01 s

Metering (BESTCOMS™)

Generator Voltage

Range: 10 V to 79 kV Accuracy: ±0.5% (at 25°C)

Generator Current

Range: 0.04 to 3,000 Aac for 1 A CT (Not to exceed nominal CT rating)

0.2 to 15,000 Aac for5 A CT (Not to exceed nominal CT rating) Accuracy: ±0.5% (at 25°C)

Frequency

Range: 40 to 65 Hz Accuracy: ±0.2 Hz (at 25°C)

Field Voltage

Range: 0 to 200 Vdc Accuracy: ±5.0% (at 25°C)

Field Current

Range: 0 to 20 A Accuracy: ±0.5% (at 25°C)

Bus Voltage

Range: 10 V to 79 kV Accuracy: ±0.5% (at 25°C)

Auxiliary DC Input

Range: –3 V to +3 V Accuracy: ±0.5% (at 25°C)

9287500991 Rev M DECS-100 General Information 1-5

Power (Apparent, Real, and Reactive)

Range: 0 to 99 MVA, MW, Mvar Accuracy: ±3.0% (at 25°C)

Power Factor

Range: –1.0 to –0.6, +0.6 to +1.0 Accuracy: ±0.02 at rated current (25°C), CT input ≥10% nominal rating

Phase Angle

Range: 0 to 360 degrees Accuracy: ±2.0 degrees (at 25°C), CT input ≥10% nominal rating

Environment

Operating Temperature

DECS-100: –40 to 70°C (–40 to 158°F)

Storage Temperature

DECS-100: –40 to 85°C (–40 to 185°F) CD-ROM: 0 to 50°C (32 to 122°F)

Type Tests

Shock: Withstands 20 G in three perpendicular planes Vibration: Withstands 1.2 G at 5 to 26 Hz Withstands 0.914 mm (0.036 in) double amplitude at 27 to 52 Hz Withstands 5 G at 53 to 500 Hz Salt Fog: Qualified per MIL-STD-810E

Physical

Weight

Unit: 1.10 kg (2.42 lb) Shipping: 1.31 kg (2.88 lb)

Shipping Carton Dimensions (W x H x D)

Single Unit: 299 x 79 x 146 mm (11.75 x 3.125 x 5.75 in) 48 Units: 841 x 653 x 352 mm (33.13 x 25.69 x 13.88 in)

Maritime Recognition

Recognized per standard IACS UR (sections E10 and E22) by the following:

• Bureau Veritas (BV) – BV Rules Pt. C, Ch. 3

• Det Norske Veritas (DNV) – No. 2.4

• Germanischer Lloyd (GL) – VI-7-2

IEC 60092-504 is the base standard for IACS UR sec tion E10. I ACS UR is the ba se standar d for the B V, DNV, and GL rules listed above. Additional conditions must be met in order to comply with maritime agency standards, see Section 4, Installation for further instructions.

EAC Mark (Eurasian Conformity)

• TP TC 004/2011

• TP TC 020/2011

UL Recognized Component

The DECS-100 is recognized to applicable Canadian and US safety standards and requirements by UL. Standards used for evaluation: UL6200

CE Compliance

LVD 2006/95/EC

BS EN 50178 – Electronic Equipment for use in Power Installations

EMC 2004/108/IEC

IEC 61000-6-2 – Electromagnetic Compatibility (EMC) Immunity for Industrial Environments IEC 61000-6-4 – Electromagnetic Compatibility (EMC) Emissions Standard for Industrial Environments

1-6 DECS-100 General Information 9287500991 Rev M

SECTION 2 • HUMAN-MACHINE INTERFACE

TABLE OF CONTENTS

SECTION 2 • HUMAN-M ACHINE INTERF ACE ....................................................................................... 2-1

INTRODUCTION.................................................................................................................................... 2-1

FRONT PANEL INDICATORS ............................................................................................................... 2-1

Overexcitation Shutdown ................................................................................................................... 2-1

Generator Overvoltage ....................................................................................................................... 2-1

Loss of Generator Sensing ................................................................................................................. 2-1

Overexcitation Limiting ....................................................................................................................... 2-2

Underexcitation Limiting ..................................................................................................................... 2-2

Var/P.F. Mode Active ......................................................................................................................... 2-2

Manual Mode Active ........................................................................................................................... 2-2

Underfrequency Active ....................................................................................................................... 2-2

COMMUNICATION PORT ..................................................................................................................... 2-2