Basler-electric DECS-400 User Manual

INSTRUCTION MANUAL FOR DECS-400 Digital Excitation Control System Publication: 9369700990 Revision: R Jan-15

viii 9369700990 Rev R Poor Voltage Regulation ...

88 9369700990 Rev R Protection The Protection screen consists of five tabs: General Protection, 24 Volts/Hertz, Loss of Sensing, EDM, and Relay Set

9369700990 Rev R 89 Generator Undervoltage – Enable/Disable. The generator undervoltage pickup level and delay settings are enabled and disabled by t

90 9369700990 Rev R Figure 55. Protection Screen, 24 Volts/Hz Tab Loss of Sensing Loss of Sensing tab functions are shown in Figure 56 and describ

9369700990 Rev R 91 Loss of Sensing Voltage – Balanced Level. When all three phases of sensing voltage decrease below this setting, the loss of sensi

92 9369700990 Rev R Figure 59. Protection Screen, EDM Tab The Calculator button, adjacent to the Pole Ratio field, can be clicked to access the Po

9369700990 Rev R 93 Relay Setup Relay Setup settings are shown in Figure 61 and described in the following paragraphs. Figure 61. Protection Screen,

94 9369700990 Rev R Figure 62. PSS Screen, Configure Tab The Rate of Change settings are illustrated in Figure 63 and described in the following p

9369700990 Rev R 95 Washout Filter Time Constant. This setting can be used to tailor the response of the PSS rate-of-change function to the applicati

96 9369700990 Rev R Software Switch Settings – SSW 3, PSS Signal. This setting selects between derived speed or frequency (SSW 2) and power as the

9369700990 Rev R 97 Low-Pass/Ramp Tracking – Tr-Time Const. This setting field configures the ramp tracking filter time constant. The time constant h

9369700990 Rev R ix Power System Stabilizer (PSS) ...

98 9369700990 Rev R Figure 66. PSS Screen, Output Limiter Tab Logic Output Limiter – Upper Limit. This per-unit setting adjusts the high limit val

9369700990 Rev R 99 Figure 67. Metering Screen, Operation Tab Tracking. One real-time metering field indicates the setpoint tracking error. Two stat

100 9369700990 Rev R Setpoint Fine Adjust. Clicking the Raise button increases the active operating setpoint. Clicking the Lower button decreases t

9369700990 Rev R 101 Figure 69. Metering Screen, System Status Tab Front Panel LED Status. These indicators mirror the front panel indicator LEDs on

102 9369700990 Rev R Figure 70. Metering Screen, I/O Status Tab Data Log The Data Log screen consists of five tabs: Log Setup, Logic Triggers, Mod

9369700990 Rev R 103 Figure 71. Data Log Screen, Log Setup Tab Data Log Setup – Total Duration (sec). This read-only field displays the total record

104 9369700990 Rev R Figure 72. Sequence of Events Reporting Screen View/Download Data Log. Clicking this button displays the Data Log Viewer scre

9369700990 Rev R 105 Record List. This area of the Data Log Viewer screen displays the list of available data log records. Individual records can be

106 9369700990 Rev R Figure 74. Data Log Screen, Mode Triggers Tab Limiter Mode. This setting enables a data log report to be triggered when the u

9369700990 Rev R 107 Cross Current Comp. Mode. This setting enables a data log report to be triggered when cross-current compensation (reactive diffe

x 9369700990 Rev R Message Structure ...

108 9369700990 Rev R Parameter Unit of Measure Threshold Increment Lower Upper Phase Angle Ia – Vca Degrees –180 to 180 –180 to 180 0.01 Phase Angl

9369700990 Rev R 109 3276710×=tageControlVolalueThresholdV For example, to trigger a data log when the DECS-400 control voltage increases above 7 Vdc

110 9369700990 Rev R Figure 76. Data Log Screen, Logic Triggers Tab Trending Trending tab settings and controls are shown in Figure 77 and describ

9369700990 Rev R 111 Setup. Trend log acquisition is enabled and disabled through this setting. Trend Duration. Trend log duration is configured by t

112 9369700990 Rev R Clear. Clicking this button clears the data points displayed in the graphs. Time in Graph. This setting selects the total time

9369700990 Rev R 113 RTM Frequency Response Clicking the Frequency Response button on the Analysis screen displays the Real-Time-Metering Frequency R

114 9369700990 Rev R Caution Exercise caution when performing frequency response testing on a generator connected to the grid. Frequencies that are

9369700990 Rev R 115 Figure 80. PSS Block Diagram: Transfer Function Input/Output Locations DECS-400 BESTCOMS™ Software

116 9369700990 Rev R Test Signal Clicking the Time Response button on the Analysis screen displays the Test Signal screen shown in Figure 81. This

9369700990 Rev R 117 RTM Step Response Clicking the Step Response button on the Analysis screen displays the Real-Time Metering Step Response screen.

9369700990 Rev R 1 General Information The DECS-400 Digital Excitation Control System is a microprocessor-based controller that offers excitation con

118 9369700990 Rev R FCR Tab FCR tab functions are shown in Figure 83 and described in the following paragraphs. The FCR tab of the RTM Step Respon

9369700990 Rev R 119 provided to return the FVR setpoint to its original value before any step changes were invoked. This original value is the FVR s

120 9369700990 Rev R and PF Step Point 2. The PF Step Point 1 value is selected by clicking the increment (up arrow) button and the PF Step Point 2

9369700990 Rev R 121 Installation When not shipped as part of assembled equipment, DECS-400 Digital Excitation Control Systems are delivered in sturd

122 9369700990 Rev R Figure 87. DECS-400 with Escutcheon Plate, Overall Dimensions Installation DECS-400

9369700990 Rev R 123 Figure 88. Panel Cutting and Drilling Dimensions DECS-400 Installation

124 9369700990 Rev R Figure 89. Field Isolation Module Dimensions Figure 90. Isolation Transformer (BE31449001) Dimensions Installation DECS

9369700990 Rev R 125 Connections DECS-400 connections are dependent on the application and excitation scheme used. Observe the following guidelines w

126 9369700990 Rev R Figure 91. Rear Panel Terminals Installation DECS-400

9369700990 Rev R 127 Field Isolation Module Terminations Field Isolation Module terminations consist of screw terminals and a D-type connector. Input

2 9369700990 Rev R o Generator undervoltage o Generator overvoltage o Loss of sensing voltage o Generator frequency less than 10 hertz o Loss

128 9369700990 Rev R Generator and bus voltage sensing terminals are listed in Table 9. Table 9. Generator and Bus Voltage Sensing Terminals Termin

9369700990 Rev R 129 Table 12. Contact Input Terminals Terminal Description B1 (START) ∗ Positive terminal of Start contact input B2 (COM) Common ter

130 9369700990 Rev R Communication Ports DECS-400 units have five communication ports: Com 0, Com 1, Com 2, Com 3, and J1. Com 0, located on the fr

9369700990 Rev R 131 Terminal Description A23 (GND) Shield connection for meter driver #1 and #2 A24 (M2+) Meter driver #2 positive terminal A25 (M2–

132 9369700990 Rev R Table 18. Field Current Sensing Terminals Terminal Description SH+ Connects to positive output terminal of current shunt –50 C

9369700990 Rev R 133 Typical Interconnections Figure 94 and Figure 95 illustrate typical interconnections for a DECS-400 used in an excitation system

134 9369700990 Rev R Figure 94. Typical AC Connection Diagram Installation DECS-400

9369700990 Rev R 135 Figure 95. Typical DC Connection Diagram DECS-400 Installation

136 9369700990 Rev R Communication Connections DECS-400 communication ports consist of a front-panel RS-232 port (Com 0), a rear-panel RS-485 port

9369700990 Rev R 137 Figure 97. Com 1 Connections for Redundant DECS-400 Operation Figure 98 illustrates the Com 2 connections used for multiple DEC

9369700990 Rev R 3 Power System Stabilizer (Style 1XXX) An optional, integrated PSS duplicates the excellent performance of the Basler PSS-100 power

138 9369700990 Rev R Pin Signal Function Direction 6 RD– Receive data - To DECS-400 7 Not used 8 Not used Figure 99. Com 3 Pin Assignments J1

9369700990 Rev R 139 Commissioning This chapter provides generic procedures and information for testing the DECS-400 during excitation system commiss

140 9369700990 Rev R Figure 100. BESTCOMS Metering Screen, Operation Tab • Verify that field flashing and shutdown occurs with the start and sto

9369700990 Rev R 141 • Use the AVR/FCR tab of the BESTCOMS Setting Adjustment screen to set the generator no-load setpoint in FCR mode. The recommen

142 9369700990 Rev R Recommended settings for var/power factor. • Set Ki at 10 ...

9369700990 Rev R 143 • The generator voltage should build to a percentage of the rated voltage. (The FCR setpoint was set to 20% of the rated excite

144 9369700990 Rev R • Verify that the FCR setpoint follows (auto-tracks) the AVR setpoint, then transfer. ... ________ • Use the

9369700990 Rev R 145 Excitation Performance Evaluation In the following performance evaluation, temporary settings will enable you to test excitation

146 9369700990 Rev R • Parallel the generator with the bus. ...

9369700990 Rev R 147 • Using BESTCOMS, set the SCL high limit to 50% greater than the metered current. ... ________ • Using BESTCOMS set

4 9369700990 Rev R Field Current Regulation Mode When operating in FCR mode, the DECS-400 regulates the dc output current of the power bridge. Beca

148 9369700990 Rev R Closed-Loop Voltage Regulator Response Measurements Proper operation of the automatic voltage regulator and exciter are criti

9369700990 Rev R 149 Maintenance DECS-400 preventative maintenance consists of regular checks to ensure that the DECS-400 connections are clean and t

150 9369700990 Rev R e. Field flash dropout level f. Generator soft start bias g. Generator soft start time Check the external field flashing co

9369700990 Rev R 151 High Generator Voltage (In AVR Mode) Check the for the following settings: a. AVR voltage setpoint b. AVR Kg loop gain (too h

152 9369700990 Rev R DECS-400 Reboots Frequently If a single input power source is used and the input power is less than the minimum as specified o

9369700990 Rev R 153 install the firmware. Firmware files may be supplied as an email message file attachment, a file downloaded from the Basler Elec

154 9369700990 Rev R c. Print To File d. You will be asked to supply some information on the unit, like a serial number. i. This information wi

9369700990 Rev R 155 b. Connect c. RS232-COM0 d. Select the communications port of the host PC. e. Click Connect f. Type the password for your u

156 9369700990 Rev R Maintenance DECS-400

9369700990 Rev R 157 Specifications DECS-400 electrical and physical specifications are listed in the following paragraphs. Operating Power AC Input

9369700990 Rev R 5 52 L/M contact inputs are closed). In FCR mode, the DECS-400 provides indication that a stator overcurrent condition exists, but l

158 9369700990 Rev R Generator Current Sensing Configuration ... 1-, 2-, or 3-phases. Separate cross-current c

9369700990 Rev R 159 Programmable Inputs Any of the 10 programmable inputs can be configured, through the integrated programmable logic, with the fol

160 9369700990 Rev R Current Control Output Range ... 4 to 20 mAdc Terminals...

9369700990 Rev R 161 Com 1 Interface ... RS-485 Connection Type ... Rear-panel screw ter

162 9369700990 Rev R Temperature Stability……………..±0.5% between 0 and 50°C (32 and 122°F) at constant load and frequency Response Time ...

9369700990 Rev R 163 Traverse Rate Range ... 1 to 80 s Increment ... 0.1

164 9369700990 Rev R Summing Point Overexcitation Limiter Three on-line setpoint levels ... 1 (high), 2 (medium), and 3 (low). Limiter response

9369700990 Rev R 165 Stator Current Single- or three-phase summing-point limiter with PI control loop. Limiter has two steps…High and Low. Setpoint R

166 9369700990 Rev R Volts per Hertz (24) Setting Range ... 0.5 to 6 V/Hz Integrating Reset Range ... 0 to

9369700990 Rev R 167 Note For applications where battery backup is not desired, refer to the Maintenance chapter, for instructions on removing the ba

6 9369700990 Rev R Metering Two programmable, 4 to 20 mAdc, analog meter drivers are provided. The meter side is isolated from DECS-400 circuitry.

168 9369700990 Rev R Specifications DECS-400

9369700990 Rev R 169 Programmable Logic The DECS-400 utilizes programmable logic functionality in the form of multiplexors, AND gates, OR gates, NOT

170 9369700990 Rev R Figure 105. Logic Timer Configuration Logic Schemes Logic schemes provided with the DECS-400 include a default scheme that is

9369700990 Rev R 171 Figure 106. Default Logic Start InputStop InputAVR InputManual InputRaise InputLower InputSwitch Input 1Alarm ResetSwitch In

172 9369700990 Rev R Figure 107. Single DECS-400 With PSS (Part 1 of 3) Start Input(Input Buffer)Start Initiate(Output Buffer)Stop Input(Input

9369700990 Rev R 173 Figure 108. Single DECS-400 With PSS (Part 2 of 3) Switch Input 10Disable RemoteCommunication(Input Buffer)RS-485 Communica

174 9369700990 Rev R Figure 109. Single DECS-400 With PSS (Part 3 of 3) OEL Active(Input Buffer)Output Relay #3Common Limiter(s)(Output Buffer

9369700990 Rev R 175 Figure 110. Single DECS-400 Without PSS (Part 1 of 3) Start Input(Input Buffer)Start Initiate(Output Buffer)Stop Input(Inp

176 9369700990 Rev R Figure 111. Single DECS-400 Without PSS (Part 2 of 3) Switch Input 10Disable RemoteCommunication(Input Buffer)RS-485 Com

9369700990 Rev R 177 Figure 112. Single DECS-400 Without PSS (Part 3 of 3) OEL Active(Input Buffer)Output Relay #3Common Limiter(s)(Output Buffer

9369700990 Rev R 7 An internal modem is also provided to remotely access DECS-400 settings and alarms. Password Protection All DECS-400 parameters ca

178 9369700990 Rev R Figure 113. Dual DECS-400 With PSS (Part 1 of 3) Start Input(Input Buffer)Start Initiate(Output Buffer)Stop Input(Input B

9369700990 Rev R 179 Figure 114. Dual DECS-400 With PSS (Part 2 of 3) Switch Input 10Disable RemoteCommunication(Input Buffer)RS-485 Communicati

180 9369700990 Rev R Figure 115. Dual DECS-400 With PSS (Part 3 of 3) OEL Active(Input Buffer)Output Relay #3Common Limiter(s)(Output Buffer)Tra

9369700990 Rev R 181 Figure 116. Dual DECS-400 Without PSS (Part 1 of 3) Start Input(Input Buffer)Start Initiate(Output Buffer)Stop Input(Inpu

182 9369700990 Rev R Figure 117. Dual DECS-400 Without PSS (Part 2 of 3) Switch Input 10Disable RemoteCommunication(Input Buffer)RS-485 Comm

9369700990 Rev R 183 Figure 118. Dual DECS-400 Without PSS (Part 3 of 3) OEL Active(Input Buffer)Output Relay #3Common Limiter(s)(Output Buffer)Tr

184 9369700990 Rev R Logic Scheme Modification If desired, a predefined logic scheme can be altered to accommodate the specific needs of an applica

9369700990 Rev R 185 Open “Single DECS-400 Without PSS” Logic Scheme for Editing 1. Open the “Single DECS-400 Without PSS” logic scheme in BESTCOMS

186 9369700990 Rev R =====> DESTINATION: Layer2 InputBuffer.Contact Switch 3 ---> Mux1.Input Layer1.Not2.Output ---> Mux2.Input Layer1.O

9369700990 Rev R 187 Delete Unneeded Logic Associations All logic connections and components that will be affected by the modifications to be made mu

8 9369700990 Rev R General Information DECS-400

188 9369700990 Rev R 2. Figure 122 illustrates the DECS Logic window settings associated with this step. Disconnect the Field Overcurrent Active i

9369700990 Rev R 189 Create New Logic Associations After all unneeded logic associations are deleted, new logic associations can be made. Table A-2 l

190 9369700990 Rev R 2. Figure 125 illustrates the DECS Logic window settings associated with this step. Connect the Field Overcurrent Active inpu

9369700990 Rev R 191 4. Figure 127 illustrates the DECS Logic window settings associated with this step. Connect output1 of multiplexer 1 on layer 4

192 9369700990 Rev R Verify and Finalize Modified Logic Scheme Logic scheme modifications can be verified by reviewing the logic associations displ

9369700990 Rev R 193 4. Figure 130 illustrates the DECS Logic window settings associated with this step. a. Under Source, select Input as the Layer

194 9369700990 Rev R Figure 131. Disconnect Load Compensation Input Figure 132. Layer2.Mux1.Output2 ---> Layer1.Mux1.Input Programmable L

9369700990 Rev R 195 Logic Definitions Logic definitions for DECS-400 inputs and outputs are described in the following paragraphs. Logic Inputs Star

196 9369700990 Rev R PF Mode Status indication of PF (0=off, 1=on) (DECS-400 does not need to be in Start). Note FCR, AVR, VAR, and PF mode indica

9369700990 Rev R 197 Below 10 Hz Indication of a below 10 Hz protection alarm. EDM Open Indication of an open exciter diode protection alarm. EDM Sho

9369700990 Rev R 9 Human-Machine Interface This chapter describes the DECS-400 human-machine interface (HMI) and illustrates navigation of the menu t

198 9369700990 Rev R Current Unbalance Indication that the power system stabilizer is disabled by a current unbalance condition. Power Below Thresh

9369700990 Rev R 199 Manual Puts the DECS-400 in manual mode (latching). Pre Position 1 Returns the active setpoint to its programmed pre position 1

200 9369700990 Rev R Secondary Protect Activates secondary protection settings only when it is active (non-latching). Field Over Voltage 0=Disabled

9369700990 Rev R 201 OEL Style 0=Summing Point, 1=Takeover (default=1) OEL Off-Line/On-Line Option Activates on-line overexcitation limiter settings

202 9369700990 Rev R Relay Output 1 through 6 Direct link to relay outputs 1 through 6. Programmable Logic DECS-400

9369700990 Rev R 203 Modbus™ Communication This chapter describes the Modbus communication protocol employed by the DECS-400, and how to exchange inf

204 9369700990 Rev R Modbus protocol limits a device address from 1 to 247. The address is user selectable at installation, and can be altered duri

9369700990 Rev R 205 Setting Programmable Y (Yes)/N (No) Default Value Value Range Parity Y None ‘N’=None, ‘O’=Odd, ‘E’=Even Stop Bits Y 2 1 or 2 Mod

206 9369700990 Rev R Code Name Meaning 02 Illegal Data Address A register referenced in the data block does not support queried read/write; For Fun

9369700990 Rev R 207 Response The response message contains the data queried. The data block contains the block length in bytes followed by the data

10 9369700990 Rev R Locator Description H Reset Pushbutton. This button is pressed to reset DECS-400 alarms or cancel a settings editing session. I

208 9369700990 Rev R Query message format is: Device Address Function Code = 10 (hex) Starting Address High Starting Address Low Number of Registe

9369700990 Rev R 209 Loop Back Diagnostic Test (FC=8) with Diagnostic Sub Function, Return Query Data This query contains data to be returned (looped

210 9369700990 Rev R It should be noted that an ASCII string is not a DECS-400 generic data type. An ASCII string will be considered as a sequence

9369700990 Rev R 211 Floating Point (R23_32) Data Format The specific floating point format matches the floating point format used for the Modicon 98

212 9369700990 Rev R exclusive-ORed with the fixed polynomial value A001 (hex) prior to the next shift. Once all bytes of the message have undergon

9369700990 Rev R 213 DECS-400 Register Tables Each data to be transmitted via Modbus is identified by its holding register(s). The following tables p

214 9369700990 Rev R Registers Data Description Access Data Format 40045 2nd character of the boot program version R UINT8 40046 3rd character of t

9369700990 Rev R 215 Registers Data Description Access Data Format 40211 Relay output states b0 = watchdog, b1 = on/off, b2 = Relay 1, b3 = Relay 2,

216 9369700990 Rev R Holding Registers for System Configuration Table 37. Information Category C3—System Configuration Registers Data Description A

9369700990 Rev R 217 Holding Registers for Operating Mode Parameters Table 38. Information Category C4—Operating Mode Parameters Registers Data Descr

9369700990 Rev R 11 6. Limiters. System limiters such as overexcitation and underexcitation. 7. PSS. The power system stabilizer menu consists of f

218 9369700990 Rev R Registers Data Description Access Data Format 40726 Enables traverse rate to the pre-position 1 for the mode RW UINT16 40727 E

9369700990 Rev R 219 Registers Data Description Access Data Format 40779 AVR mode traverse rate, adjustable from 10 to 200 seconds in 1 second increm

220 9369700990 Rev R Registers Data Description Access Data Format 40839 Step size for PF mode setpoint's adjustable maximum (in % of rated fi

9369700990 Rev R 221 Registers Data Description Access Data Format 41191 Loss of Sensing Balanced Level RW FLOAT 41193 Loss of Sensing Unbalanced Lev

222 9369700990 Rev R Registers Data Description Access Data Format 41443 to 41469 Reserved for future C7 use RW Not Defined 41471 Active SCL Limite

9369700990 Rev R 223 Registers Data Description Access Data Format 41855 Var limiter initial delay for secondary selection RW FLOAT 41856 to 42474 Re

224 9369700990 Rev R Registers Data Description Access Data Format 42608 Defined 42609 Loop gain for var limiter RW FLOAT 42611 Integral gain for v

9369700990 Rev R 225 Holding Registers for Exciter Diode Monitor Parameters Table 44. Information Category C10—Exciter Diode Monitor Parameters Regis

226 9369700990 Rev R Registers Data Description Access Data Format 43628 Relay 3 Contact Status RW UINT16 43629 Relay 3 Momentary Time RW UINT16 43

9369700990 Rev R 227 Holding Registers for Metering Parameters, Group 2 Table 47. Information Category C13—Metering, Group 2 Registers Data Descripti

12 9369700990 Rev R PF MODE FVR MODE \PREP_SET2 AVR MODE FCR MODE VAR MODE PF MODE FVR MODE \D400\GAIN LOOP GAINS \P_AVR_GAINS PRI S

228 9369700990 Rev R Registers Data Description Access Data Format 44345 Primary Logic Output Limiter Time Delay RW FLOAT 44347 Primary Logic Limit

9369700990 Rev R 229 Registers Data Description Access Data Format 44581 Secondary Torsional Filter #1 Zeta Denominator RW FLOAT 44583 Secondary Tors

230 9369700990 Rev R Modbus™ Communication DECS-400

9369700990 Rev R 231 Revision History Table 49 provides a historical summary of the changes made to the DECS-400 hardware. Application firmware chang

232 9369700990 Rev R Firmware Version and Date Change 1.04, Nov-06 • Decreased contact input recognition time • Expanded setting range of rated

9369700990 Rev R 233 Software Version and Date Change 1.07.01, Feb-10 • Expanded range of allowable generator ratings and protection settings 1.07.0

234 9369700990 Rev R Manual Revision and Date Change E, Dec-07 • Made Battery Backup a standard feature and updated manual accordingly F, Jan-08 •

9369700990 Rev R 235 Manual Revision and Date Change N, Jun-13 • Restored previously removed descriptions for Modbus registers 40602 and 40612 • Co

236 9369700990 Rev R Revision History DECS-400

9369700990 Rev R 13 \V/HZ_PROT2 DLAY2 PKUP DLAY2 TIME CURVE EXP \PROT_ENAB1 FIELD OV FIELD OC STATOR OV STATOR UV NO SENSING NO SNS-&

www.basler.com 12570 State Route 143 Highland IL 62249-1074 USA Tel: +1 618.654.2341 Fax: +1.618.654.2351 email: info@basler.

14 9369700990 Rev R \D400\LIMIT LIMITERS \OPTION_1 OEL STYLE OEL OPTION UEL STYLE OEL GROUP UEL GROUP SCL GROUP \OPTION_2 UF OR V/HZ

9369700990 Rev R 15 \S_UEL_CRV_Y PNT 1 VARS PNT 2 VARS PNT 3 VARS PNT 4 VARS PNT 5 VARS \P_SCLIM SCL HI LIM HI LIM TIME SCL LO LIM IN

16 9369700990 Rev R \D400\PSS\PARAMETER PSS PARAMETERS \P_FILTER1 QUADTURE XQ SCALER KPE LP FLTR T11 LP FLTR T12 LP FLTR T13 RT FLTR TR

9369700990 Rev R 17 \D400\PSS\LIMTERS PSS LIMITERS \P_OUTPUT_LMT UPPER LIMIT LOWER LIMIT GAIN \S_OUTPUT_LMT UPPER LIMIT LOWER LIMIT GAIN \

9369700990 Rev R i Preface This instruction manual provides information about the installation and operation of the DECS-400 Digital Excitation Contr

18 9369700990 Rev R \CONFIGURE CONFIGURATION \CONFG\CNFG_DATA_1 FIELD TYPE VLTAGE SNSE MOTOR MODE CURRNT SNSE CT SELECT \CNFG\CNFG_DATA_2

9369700990 Rev R 19 FVR TRAVEL FVR RATE \PMODE\PREP_MODE2 AVR MODE FCR MODE VAR MODE PF MODE FVR MODE \PREP2_RATES1 AVR TRAVEL AVR RA

20 9369700990 Rev R COMB FLM \CONTRAST LCD CONTRAST \CLOCK CLOCK \RTC\CLK_FORMAT TIME FORMAT DST FORMAT DATE FORMAT Editing Settings DEC

9369700990 Rev R 21 Edit pushbutton. Kp, Ki, and Kd may not be edited when the stability setting number is set at 1 through 20. If the DECS-400 is op

22 9369700990 Rev R DECS-400 units are delivered with the same global and setpoint access password: DECS4. When the global and setpoint passwords a

9369700990 Rev R 23 Metering Label Description Hz/sec Rate of frequency change I Avg Average of three generator line currents Ia A-phase generator li

24 9369700990 Rev R Alarms Message The alarms message line remains blank during normal operating conditions. If an enunciable condition occurs, “AL

9369700990 Rev R 25 message. If a condition that led to an annunciation is still present when the alarm message screen is cleared, then a new annunci

26 9369700990 Rev R Human-Machine Interface DECS-400

9369700990 Rev R 27 Functional Description This chapter describes how the DECS-400 functions and explains its operating features. To ease under-stand

ii 9369700990 Rev R 12570 State Route 143 Highland IL 62249-1074 USA www.basler.com [email protected] Tel: +1 618.654.2341 Fax: +1 618.654.2351

28 9369700990 Rev R Generator Voltage Generator sensing voltage is supplied to DECS-400 terminals A9 (E1), A10 (E2), and A11 (E3) through external,

9369700990 Rev R 29 In AVR mode, the accessory input signal is multiplied by the AVR mode gain setting, which defines the setpoint change as a percen

30 9369700990 Rev R field current (FCR) or the level of field voltage (FVR). Manual contact input connections are made at terminals B6 (MAN) and B5

9369700990 Rev R 31 Input resistance is nonlinear and approximately 4 kΩ at 3.5 Vdc and 3 kΩ at 20 Vdc. IRIG signal connections are made at terminals

32 9369700990 Rev R On/Off The SPST On/Off output contacts close when the DECS-400 is enabled and open when the DECS-400 is disabled. On/Off output

9369700990 Rev R 33 Ethernet Port A rear-panel, RJ-45 connector, designated Com 3, enables communication with the DECS-400 over a 10BASE-T Ethernet n

34 9369700990 Rev R Figure 5. Soft Start Voltage Reference Failure to Build Up The failure to build up function monitors if the active control mod

9369700990 Rev R 35 AVR AVR mode is selected by a momentary contact input applied to terminals B4 and B5. AVR mode may also be selected through BESTC

36 9369700990 Rev R var setpoint from one limit to the other is controlled by the Var Traverse Rate setting. The Var Traverse Rate is adjustable fr

9369700990 Rev R 37 Transient Boost Note Effective with firmware version 1.09, transient boost voltage settings are based on the voltage setpoint. I

9369700990 Rev R iii This publication contains confidential information of Basler Electric Company, an Illinois corporation. It is loaned for confide

38 9369700990 Rev R Typical field overcurrent timing curves are illustrated in Figure 6. Notice that field current levels below 103% cause an annun

9369700990 Rev R 39 DECS-400 can be configured to transfer to FCR mode when a loss of sensing voltage condition is detected. Two Level settings are p

40 9369700990 Rev R Figure 7. Generator Capability Curve Versus 40Q Response Figure 8. Motor Capability Curve Versus 40Q Response Field Overtemp

9369700990 Rev R 41 nNOMINALMEASUREDTTHzVHzVDT−=1// 100××=FSTEDTTRR Where: TT = time to trip TR = time

42 9369700990 Rev R Figure 10. V/Hz Characteristic—Time Shown on Horizontal Axis Exciter Diode Monitor (EDM) The EDM function in the DECS-400 moni

9369700990 Rev R 43 Exciter Diode Monitor Settings It is especially difficult to detect open diode conditions when the number of generator and excite

44 9369700990 Rev R Stator Current Limiter The stator current limiter (SCL) monitors the level of stator current and limits it to prevent stator ov

9369700990 Rev R 45 Figure 12. Summing Point, Off-Line Overexcitation Limiting There are three sets of summing point OEL settings for on-line operat

46 9369700990 Rev R Figure 14. Inverse Time Characteristic for Takeover-Style OEL The inverse time characteristic is defined by the following equa

9369700990 Rev R 47 (0.49 x kWpu x kWpu − 1.0) x kvar_level Where: kw_pu = metered kW level in per-unit kvar_level = user setting for kvar i

iv 9369700990 Rev R Preface DECS-400

48 9369700990 Rev R Figure 16. Typical Underfrequency Compensation Curve Volts per Hertz Limiter The volts per hertz limiter prevents the regulati

9369700990 Rev R 49 hertz limiter and can be adjusted from 0 to 3 in increments of 0.01. The V/Hz Time Limiter setting establishes the time delay for

50 9369700990 Rev R Autotracking The DECS-400 provides automatic tracking (following) of the controlling mode setpoint by the non-controlling setpo

9369700990 Rev R 51 • Lower • Raise • Start • Stop • Switch Input 1 • Switch Input 2 • Switch Input 3 • Switch Input 4 • Switch Input 5 • S

52 9369700990 Rev R Data recording may be triggered by logic triggers, level triggers, or manually through BESTCOMS. Logic triggers allow data rec

9369700990 Rev R 53 PSS features include user-selectable speed-only sensing, two- or three-wattmeter power measurement, optional frequency based oper

54 9369700990 Rev R Speed Signal The speed signal is converted to a constant level that is proportional to the shaft speed (frequency). Two high-pa

9369700990 Rev R 55 The derived integral of mechanical power signal is then passed through a mechanical-power, low-pass filter and ramp tracking filt

56 9369700990 Rev R Torsional filters 1 and 2 are controlled by a zeta numerator (Zeta Num), zeta denominator (Zeta Den), and a frequency response

9369700990 Rev R 57 Figure 25. Washout Filter and Logic Limiter Output Stage Prior to connecting the stabilizer output signal to the voltage regulat

9369700990 Rev R v Contents General Information ...

58 9369700990 Rev R The limiter reduces the stabilizer’s upper limit, VPSS_ULMT, at a fixed rate until zero is reached or overvoltage is no longer

9369700990 Rev R 59 BESTCOMS™ Software BESTCOMS-DECS400 is a Windows® based application that provides a user-friendly environment for programming and

60 9369700990 Rev R Figure 27. BESTCOMS Screen Components Open Settings From File. Clicking this button displays an “Open Settings File” window th

9369700990 Rev R 61 Information Bar When the cursor is placed in a setting field, the information bar displays the setting description, the setting l

62 9369700990 Rev R Connecting BESTCOMS can connect to a networked DECS-400 by using one of two methods. If the static IP address for the DECS-400

9369700990 Rev R 63 Figure 32. NTP Settings The Update Time setting determines how frequently the DECS-400 accepts updates from the network time ser

64 9369700990 Rev R Figure 33. System Configuration Screen, Product Identification Tab Unit Information. When communication between BESTCOMS and t

9369700990 Rev R 65 Figure 34. System Configuration Screen, Rated Data Tab Field Rated Data – Current. The rated main field or exciter field current

66 9369700990 Rev R Figure 35. System Configuration Screen, Options Tab Temperature Mode. This setting determines the scale that BESTCOMS and the

9369700990 Rev R 67 Figure 36. System Configuration Screen, Auxiliary Input Tab Input Type. This setting selects either voltage (–10 Vdc to +10 Vdc)

vi 9369700990 Rev R Digital to Analog Converter ...

68 9369700990 Rev R • Auxiliary Voltage Input • AVR PID Error Signal Input • Bus Frequency • Bus Voltage • Comp. Freq. Deviation • Control Ou

9369700990 Rev R 69 Figure 38. System Configuration Screen, System Data Tab Generator PT – Primary Voltage. The primary voltage rating of the genera

70 9369700990 Rev R Field Current Sensing – Shunt Rating. The maximum current rating of the field shunt is entered in this setting field. (The fiel

9369700990 Rev R 71 Fault Current Threshold. The threshold for fault current is entered in this field. A setting of 0 to 400 may be entered in 0.1% i

72 9369700990 Rev R Automatic Voltage Regulator (AVR) – Max (% of rated). The generator maximum voltage, expressed as a percentage, is entered in t

9369700990 Rev R 73 FCR Pre-position 1 – Traverse Rate/Enable. When enabled, this setting controls the amount of time required to drive the operating

74 9369700990 Rev R Figure 41. Setting Adjustment Screen, VAR/PF Tab Reactive Power Control (VAR) – DECS Setpoint. This read-only field displays t

9369700990 Rev R 75 VAR Pre-position 2 – Mode. This setting determines whether or not the DECS-400 will respond to further var setpoint change comman

76 9369700990 Rev R Figure 42. Setting Adjustment Screen, Startup Tab The Primary and Secondary buttons select between the primary and secondary S

9369700990 Rev R 77 Volts/Hz Limiter Settings –V/Hz Time Limiter. The time delay for the volts per hertz limiter is entered in this setting field. A

9369700990 Rev R vii Rate of Frequency Change Blocking ...

78 9369700990 Rev R When tuning the proportional gain, consider the following guidelines. If the transient response has too much overshoot, then Kp

9369700990 Rev R 79 T’do – Gen. Time Constant (sec). The time constant of the generator is entered in this field. The generator time constant and exc

80 9369700990 Rev R Figure 45. Gain Settings Screen, FCR Gain Tab Other Gain Other Gain tab functions are shown in Figure 46 and described in the

9369700990 Rev R 81 VAR – Ki Integral Gain. This setting adjusts the integral gain, which determines the characteristic of the DECS-400 dynamic respo

82 9369700990 Rev R Figure 47. Limiters Screen, Configuration Tab OEL Voltage Dependency – dv/dt Level. This setting controls the level of voltage

9369700990 Rev R 83 Figure 48. Limiters Screen, Summing Point OEL Tab On-Line – High Level. This setting configures the high-level current setpoint

84 9369700990 Rev R Figure 49. Limiters Window, UEL Tab Reactive Power (Leading kVAR). When the Curve Selection setting is “Custom”, these setting

9369700990 Rev R 85 Figure 50. Limiters Screen, Takeover OEL Tab Offline and Online Curve Checkboxes. Checking these boxes displays a plot of the ta

86 9369700990 Rev R Figure 51. Limiters Screen, SCL Tab VARL The VARL tab has two setting groups: Primary and Secondary. The Primary and Secondary

9369700990 Rev R 87 Setpoint. This setting configures the threshold where the level of exported reactive power is limited. The Setpoint setting range