Basler-electric DECS-250N User Manual

INSTRUCTION MANUAL FOR DECS-250N Digital Excitation Control System Publication: 9440500990 Revision: D May-15

viii 9440500990 Rev D Contents DECS-250N Predefined Stability Settings ...

84 9440500990 Rev D Metering DECS-250N Figure 77. Real-Time Clock Screen Auto Export Metering Found under the Tools menu, the auto export metering

9440500990 Rev D 85 DECS-250N Event Recorder Event Recorder DECS-250N event recorder functions include sequence-of-events recording (SER), data logg

86 9440500990 Rev D Event Recorder DECS-250N Setup When oscillography is enabledA, each record can consist of up to six user-selectable parametersB

9440500990 Rev D 87 DECS-250N Event Recorder Mode Triggers Mode triggers initiate data logging as a result of an internal or external DECS-250N stat

88 9440500990 Rev D Event Recorder DECS-250N Level Triggers Level triggering initiates a data log based on the value of an internal variable. The va

9440500990 Rev D 89 DECS-250N Event Recorder • PSS power HP #1 • PSS pre-limit output • PSS speed HP #1 • PSS synthesized speed • PSS terminal

90 9440500990 Rev D Event Recorder DECS-250N Figure 84. Trend Log Setup A Trending Enable: Se

9440500990 Rev D 91 DECS-250N Power System Stabilizer Power System Stabilizer The optional (style xPxxxxx), integrated power system stabilizer (PSS)

92 9440500990 Rev D Power System Stabilizer DECS-250N Figure 85. PSS Function Blocks and Software Switches

9440500990 Rev D 93 DECS-250N Power System Stabilizer Speed Signal The speed signal is converted to a constant level that is proportional to the sha

9440500990 Rev D ix DECS-250N Contents Programming BESTlogic™Plus...

94 9440500990 Rev D Power System Stabilizer DECS-250N Figure 87. Generator Electrical Power Signal After high-pass filtering, the electrical power

9440500990 Rev D 95 DECS-250N Power System Stabilizer Figure 89. Stabilizing Signal Selection Torsional Filters Two torsional filters, shown in Fig

96 9440500990 Rev D Power System Stabilizer DECS-250N The logic limiter compares the signal from the washout filter with the logic limiter upperJJ a

9440500990 Rev D 97 DECS-250N Power System Stabilizer generator voltage exceeds the terminal voltage setpointQQ. The terminal voltage limiter is ena

98 9440500990 Rev D Power System Stabilizer DECS-250N Figure 96. PSS Parameter Settings

9440500990 Rev D 99 DECS-250N Power System Stabilizer Figure 97. PSS Output Limiter Settings

100 9440500990 Rev D Power System Stabilizer DECS-250N

9440500990 Rev D 101 DECS-250N Stability Tuning Stability Tuning Generator stability tuning in the DECS-250N is achieved through the calculation of

102 9440500990 Rev D Stability Tuning DECS-250N Figure 98. AVR Stability Settings A Gain Optio

9440500990 Rev D 103 DECS-250N Stability Tuning Figure 99. PID Calculator A Kp – Proportional

x 9440500990 Rev D Contents DECS-250N Daylight Saving Time Adjustments ...

104 9440500990 Rev D Stability Tuning DECS-250N Caution PID values calculated by the Auto Tuning function are to be implemented only after their sui

9440500990 Rev D 105 DECS-250N Stability Tuning The derivative gain (Kd)C is multiplied by the derivative of the error between the current setpoint

106 9440500990 Rev D Stability Tuning DECS-250N Other Modes and Functions BESTCOMSPlus Navigation Path: Settings Explorer, Operating Settings, Gain,

9440500990 Rev D 107 DECS-250N Stability Tuning Figure 102. Other Mode and Function Gain Settings

108 9440500990 Rev D Stability Tuning DECS-250N

9440500990 Rev D 109 DECS-250N Mounting Mounting As delivered, the DECS-250N is configured for projection (wall) mounting. Front panel mounting is p

110 9440500990 Rev D Mounting DECS-250N Figure 103. Overall and Projection Mounting Dimensions

9440500990 Rev D 111 DECS-250N Mounting Figure 104. DECS-250N Optional Escutcheon Plate Dimensions (Basler P/N 9440311101) for New Installations

112 9440500990 Rev D Mounting DECS-250N Figure 105. Panel Cutting and Drilling Dimensions for DECS-250N Panel Mounting for New Installations

9440500990 Rev D 113 DECS-250N Mounting Figure 106. DECS-250N Optional Escutcheon Plate Dimensions (Basler P/N 9440506101) for Replacing a DECS-200

9440500990 Rev D xi DECS-250N Contents Protection Settings ...

114 9440500990 Rev D Mounting DECS-250N

9440500990 Rev D 115 DECS-250N Terminals and Connectors Terminals and Connectors DECS-250N terminals and connectors are located on the left side pan

116 9440500990 Rev D Terminals and Connectors DECS-250N Figure 107. Left Side Panel Terminals

9440500990 Rev D 117 DECS-250N Terminals and Connectors Table 5. Left Side Terminal and Connector Descriptions Locator Description A These terminals

118 9440500990 Rev D Terminals and Connectors DECS-250N Figure 108. Right Side Connectors and Terminals

9440500990 Rev D 119 DECS-250N Terminals and Connectors Table 6. Right Side Terminal and Connector Descriptions Locator Description K A second DECS-

120 9440500990 Rev D Terminals and Connectors DECS-250N Terminal Block Maximum Wire Size Compression Terminals Spring Terminals M 16 AWG 1.5 mm2 (so

9440500990 Rev D 121 DECS-250N Typical Connections Typical Connections Typical connection diagrams are provided in this chapter as a guide when wiri

122 9440500990 Rev D Typical Connections DECS-250N Figure 109. Typical DECS-250N Connections for Shunt Powered Applications

9440500990 Rev D 123 DECS-250N Typical Connections Figure 110. Typical DECS-250N Connections for PMG Powered Applications

xii 9440500990 Rev D Contents DECS-250N Maximum Negative Forcing Voltage ...

124 9440500990 Rev D Typical Connections DECS-250N Figure 111. Typical DECS-250N Connections for Station Powered Applications

9440500990 Rev D 125 DECS-250N BESTCOMSPlus® Software BESTCOMSPlus® Software General Description BESTCOMSPlus® is a Windows®-based, PC application t

126 9440500990 Rev D BESTCOMSPlus® Software DECS-250N Installation BESTCOMSPlus software is built on the Microsoft® .NET Framework. The setup utilit

9440500990 Rev D 127 DECS-250N BESTCOMSPlus® Software Connect a USB Cable The USB driver was copied to your PC during BESTCOMSPlus installation and

128 9440500990 Rev D BESTCOMSPlus® Software DECS-250N Figure 114. BESTCOMSPlus Splash Screen The BESTCOMSPlus platform window opens. Select New Con

9440500990 Rev D 129 DECS-250N BESTCOMSPlus® Software Figure 116. DECS-250N Connection Screen The DECS-250N plugin opens indicating that activation

130 9440500990 Rev D BESTCOMSPlus® Software DECS-250N Figure 117. Activate Device Plugin Screen Entering an Activation Key Select DECS-250N from th

9440500990 Rev D 131 DECS-250N BESTCOMSPlus® Software Table 10. Upper Menu Bar (BESTCOMSPlus Shell) Menu Item Description File New Create a new se

132 9440500990 Rev D BESTCOMSPlus® Software DECS-250N Lower Menu Bar (DECS-250N Plugin) Lower menu bar functions are listed and described in Table 1

9440500990 Rev D 133 DECS-250N BESTCOMSPlus® Software Settings File Management A settings file contains all DECS-250N settings including logic. A se

9440500990 Rev D xiii DECS-250N Contents CE Compliance ...

134 9440500990 Rev D BESTCOMSPlus® Software DECS-250N (Figure 120). Select the location of the first file under Left Settings Source and select the

9440500990 Rev D 135 DECS-250N BESTCOMSPlus® Software Automatic Metering Export The auto export metering function automatically exports metering dat

136 9440500990 Rev D BESTCOMSPlus® Software DECS-250N Note The latest version of BESTCOMSPlus software should be downloaded from the Basler Electric

9440500990 Rev D 137 DECS-250N BESTCOMSPlus® Software the front panel by navigating to Metering > Status > Alarms. When communications are fun

138 9440500990 Rev D BESTCOMSPlus® Software DECS-250N 7. Click the Upload button and follow the instructions that appear to begin the upgrade proce

9440500990 Rev D 139 DECS-250N BESTlogic™Plus BESTlogic™Plus Introduction BESTlogic™Plus Programmable Logic is a programming method used for managin

140 9440500990 Rev D BESTlogic™Plus DECS-250N Figure 124. BESTlogicPlus Programmable Logic Tree Branch BESTlogic™Plus Composition There are three m

9440500990 Rev D 141 DECS-250N BESTlogic™Plus Name Description Symbol Remote Inputs IN15 - IN24 True when Remote Input x is active. (Available wh

142 9440500990 Rev D BESTlogic™Plus DECS-250N Name Description Symbol Gen Breaker Fail to Open The generator breaker did not open in the close wai

9440500990 Rev D 143 DECS-250N BESTlogic™Plus Name Description Symbol NTP Sync Lost True when NTP server has lost communications. Null Balance

xiv 9440500990 Rev D Contents DECS-250N Contact Inputs ...

144 9440500990 Rev D BESTlogic™Plus DECS-250N Name Description Symbol Setpoint at Upper Limit True when the active modes setpoint is at the upper

9440500990 Rev D 145 DECS-250N BESTlogic™Plus Name Description Symbol Contact Expansion Module, Comms Failure True when there is no communication

146 9440500990 Rev D BESTlogic™Plus DECS-250N Name Description Symbol Analog Expansion Module Remote RTD Inputs 1-8 There are four thresholds for

9440500990 Rev D 147 DECS-250N BESTlogic™Plus Name Description Symbol Off-Page Input Used in conjunction with the Off-Page Output to transform an

148 9440500990 Rev D BESTlogic™Plus DECS-250N Name Description Symbol XNOR Input Output 0 0 1 0 1 0 1 0 0 1 1 1 NOT (INVERTER) Input Output 0 1

9440500990 Rev D 149 DECS-250N BESTlogic™Plus Name Description Symbol Counter True when the count reaches a user-selected number. Count Up increm

150 9440500990 Rev D BESTlogic™Plus DECS-250N Name Description Symbol GENERATOR BREAKER This element is used to connect the breaker open and close

9440500990 Rev D 151 DECS-250N BESTlogic™Plus Name Description Symbol LOAD SHARE DISABLE This element allows load sharing with specific units on t

152 9440500990 Rev D BESTlogic™Plus DECS-250N Name Description Symbol OEL DISABLED IN MANUAL MODE When true, this element disables OEL when the un

9440500990 Rev D 153 DECS-250N BESTlogic™Plus Name Description Symbol PSS SEQ CNTRL SELECTION When true, phase rotation is selected to be ACB. Fal

9440500990 Rev C 1 DECS-250N Introduction Introduction DECS-250N Digital Excitation Control Systems offer precise excitation control and machine pro

154 9440500990 Rev D BESTlogic™Plus DECS-250N Name Description Symbol VAR LIMITER SELECT SECONDARY SETTINGS When true, this elements selects the s

9440500990 Rev D 155 DECS-250N BESTlogic™Plus Sending a Logic Scheme to the DECS-250N To send settings to the DECS-250N, the DECS-250N must be conne

156 9440500990 Rev D BESTlogic™Plus DECS-250N Figure 126. PSS-Disabled Default Logic - Logic Page 2 Tab Figure 127. PSS-Disabled Default Logic -

9440500990 Rev D 157 DECS-250N BESTlogic™Plus Figure 128. PSS-Enabled Default Logic - Logic Page 1 Tab Figure 129. PSS-Enabled Default Logic - Lo

158 9440500990 Rev D BESTlogic™Plus DECS-250N Figure 130. PSS-Enabled Default Logic – Logic Page 3 Tab Figure 131. PSS-Enabled Default Logic - P

9440500990 Rev D 159 DECS-250N BESTlogic™Plus connection to the port is required or missing. A black port indicates that a connection to the port is

160 9440500990 Rev D BESTlogic™Plus DECS-250N Timing accuracy is ±15 milliseconds. Figure 132. Pickup and Dropout Timer Logic Blocks Offline Logic

9440500990 Rev D 161 DECS-250N BESTlogic™Plus Refer to Figure 134. For information on Settings Files management, refer to the BESTCOMSPlus Software

162 9440500990 Rev D BESTlogic™Plus DECS-250N Printing a BESTlogicPlus File To view a preview of the printout, click on the Print Preview icon locat

9440500990 Rev D 163 DECS-250N Communication Communication Local Communication A type B, USB port connects the DECS-250N with a PC operating BESTCOM

2 9440500990 Rev C Introduction DECS-250N • Twelve contact outputs o One, fixed-function output: Watchdog (SPDT configuration) o Eleven programma

164 9440500990 Rev D Communication DECS-250N Modbus™ Communication BESTCOMSPlus Navigation Path: Settings Explorer, Communications, Modbus Setup HMI

9440500990 Rev D 165 DECS-250N Communication Figure 139. Typical RS-485 Connections RS-485 port communication settings are illustrated in Figure 14

166 9440500990 Rev D Communication DECS-250N CAN Communication BESTCOMSPlus Navigation Path: Settings Explorer, Communications, CAN Bus, CAN Bus Set

9440500990 Rev D 167 DECS-250N Communication Figure 142. Remote Module Setup A Contact Expansi

168 9440500990 Rev D Communication DECS-250N Figure 143. DECS-250 Connection Window Figure 144. Scanning for Connected Devices Figure 145. De

9440500990 Rev D 169 DECS-250N Communication 5. At this point you can also add any or all of the detected devices to the Device Directory. This pre

170 9440500990 Rev D Communication DECS-250N PROFIBUS Communication BESTCOMSPlus Navigation Path: Settings Explorer, Communications, Profibus Setup

9440500990 Rev D 171 DECS-250N Configuration Configuration Before the DECS-250N is placed in service, it must be configured for the controlled equip

172 9440500990 Rev D Configuration DECS-250N A Generator Voltage Rating: Adjustable from 1 to

9440500990 Rev D 173 DECS-250N Configuration Figure 150. Sensing Transformer Ratings and Configuration

9440500990 Rev C 3 DECS-250N Introduction Style Number The style number identification chart in Figure 1 defines the electrical characteristics and

174 9440500990 Rev D Configuration DECS-250N Rated Frequency A Rated FrequencyD setting establishes the rated operating power frequency to be expect

9440500990 Rev D 175 DECS-250N Configuration The field flash dropout levelC determines the level of generator voltage where field flashing is withdr

176 9440500990 Rev D Configuration DECS-250N Figure 153. Device Information A Application Par

9440500990 Rev D 177 DECS-250N Configuration Figure 154. Display Units A System Units: Select

178 9440500990 Rev D Configuration DECS-250N

9440500990 Rev D 179 DECS-250N Security Security DECS-250N security is provided in the form of passwords which control the type of operations allowe

180 9440500990 Rev D Security DECS-250N 4. Enter the desired password for the userC. 5. Reenter the password created in step 4 to verify the passw

9440500990 Rev D 181 DECS-250N Security Port Access Configuration Communication port access is configured in BESTCOMSPlus on the Port Access Setup t

182 9440500990 Rev D Security DECS-250N Login Failure A login attempts settingB limits the number of times that login can be attempted. A login time

9440500990 Rev D 183 DECS-250N Timekeeping Timekeeping The DECS-250N clock is used by the logging functions to timestamp events. DECS-250N timekeepi

4 9440500990 Rev C Introduction DECS-250N

184 9440500990 Rev D Timekeeping DECS-250N The Time Priority Setup must be used to enable a connected time source. When multiple, time sources are c

9440500990 Rev D 185 DECS-250N Timekeeping

186 9440500990 Rev D Timekeeping DECS-250N

9440500990 Rev D 187 DECS-250N Testing Testing Testing of the DECS-250N’s regulation and optional power system stabilizer (style XPXXXXX) performanc

188 9440500990 Rev D Testing DECS-250N Graph Parameters Any four of the following parameters may be selected for plotting in the graph areas.• Auxi

9440500990 Rev D 189 DECS-250N Testing BESTCOMSPlus will sweep the range of frequencies and obtain the corresponding magnitude and phase responses.

190 9440500990 Rev D Testing DECS-250N • OelOutput: OEL Controller Output • OelRef • OelState • PF: Power Factor • PositionInd: Position Indica

9440500990 Rev D 191 DECS-250N Testing Signal Input Signal input selections determine the point in the PSS circuitry where the test signal is applie

192 9440500990 Rev D Testing DECS-250N logarithmic sweeps, the test signal frequency is multiplied by 1.0 + step every half-cycle of the system freq

9440500990 Rev D 193 DECS-250N Testing Figure 162. Step Response Analysis - AVR Tab Var and PF Tabs The var and PF tabs are similar in their contro

9440500990 Rev D 5 DECS-250N Controls and Indicators Controls and Indicators All controls and indicators are located on the front panel and consist

194 9440500990 Rev D Testing DECS-250N between 100 to 500 milliseconds. Lowering the history and poll rate may also result in improved PC performanc

9440500990 Rev D 195 DECS-250N CAN Communication CAN Communication Introduction CAN Bus interface 1 facilitates communication between the DECS-250N

196 9440500990 Rev D CAN Communication DECS-250N PGN Name Units SPN Broadcast Rate 0xFE05 Generator Total Real Power Watts 2452 100 ms Genera

9440500990 Rev D 197 DECS-250N CAN Communication Diagnostic Trouble Codes (DTCs) The DECS-250N will send an unsolicited message of a currently activ

198 9440500990 Rev D CAN Communication DECS-250N

9440500990 Rev D 199 DECS-250N Modbus™ Communication Modbus™ Communication Introduction This document describes the Modbus™ communications protocol

200 9440500990 Rev D Modbus™ Communication DECS-250N • Function 08 (08 hex), subfunction 01 - diagnostics: restart communications option • Functio

9440500990 Rev D 201 DECS-250N Modbus™ Communication installation and altered during real-time operation. The DECS-250N Modbus supports baud rates u

202 9440500990 Rev D Modbus™ Communication DECS-250N CRC-32 error check code (on Ethernet) results in an infinitesimal chance of undetected corrupti

9440500990 Rev D 203 DECS-250N Modbus™ Communication DECS-250N Modbus™ via Ethernet Modbus can communicate through Ethernet if the IP address of the

6 9440500990 Rev D Controls and Indicators DECS-250N Table 1. Front Panel Control and Indicators Descriptions Locator Description A Display. The

204 9440500990 Rev D Modbus™ Communication DECS-250N CRC Lo error check Restart Communications Option This query causes the remote communications fu

9440500990 Rev D 205 DECS-250N Modbus™ Communication • There are several instances of registers that are grouped together to collectively represent

206 9440500990 Rev D Modbus™ Communication DECS-250N CRC Lo error check Response The response message echoes the Query message after the register h

9440500990 Rev D 207 DECS-250N Modbus™ Communication Long Integer Data Format (Uint32) The Modbus long integer data format uses two consecutive hold

208 9440500990 Rev D Modbus™ Communication DECS-250N K+3 (Lo Byte) ‘D’ Example: If the above string is changed to “P”, the new string will read as

9440500990 Rev D 209 DECS-250N Modbus™ Communication Group Name Register Type Bytes R/W Range Time Time 40169 String 16 R 0 - 16 Unit Information St

210 9440500990 Rev D Modbus™ Communication DECS-250N Group Name Register Type Bytes R/W Range Alarms Programmable Alarm 9 40901 bit 8 Uint16 2 R Tru

9440500990 Rev D 211 DECS-250N Modbus™ Communication Group Name Register Type Bytes R/W Range 27P Block 40904 bit 11 Uint16 2 R True=1 False=0 27P P

212 9440500990 Rev D Modbus™ Communication DECS-250N Group Name Register Type Bytes R/W Range Configurable Protection 4 Configurable Protection Thre

9440500990 Rev D 213 DECS-250N Modbus™ Communication Group Name Register Type Bytes R/W Range Contact Inputs Input 13 40911 bit 1 Uint16 2 R True=1

9440500990 Rev D 7 DECS-250N Controls and Indicators Figure 3. Menu Structure Overview Adjusting Settings A setting adjustment is made at the front

214 9440500990 Rev D Modbus™ Communication DECS-250N Group Name Register Type Bytes R/W Range Contact Expansion Module Input 7 40914 bit 4 Uint16 2

9440500990 Rev D 215 DECS-250N Modbus™ Communication Group Name Register Type Bytes R/W Range AEM Configuration RTD Input 7 Out of Range 40917 bit 7

216 9440500990 Rev D Modbus™ Communication DECS-250N Group Name Register Type Bytes R/W Range AEM Protection 6 Threshold 3 Trip 40920 bit 10 Uint16

9440500990 Rev D 217 DECS-250N Modbus™ Communication Group Name Register Type Bytes R/W Range RTD Protection 5 Threshold 1 Pickup 40923 bit 13 Uint1

218 9440500990 Rev D Modbus™ Communication DECS-250N Group Name Register Type Bytes R/W Range Network Load Share Receiving ID 3 40927 bit 0 Uint16 2

9440500990 Rev D 219 DECS-250N Modbus™ Communication Group Name Register Type Bytes R/W Unit Range Generator Voltage Meter Magnitude 1 VAB 41018 Flo

220 9440500990 Rev D Modbus™ Communication DECS-250N Group Name Register Type Bytes R/W Unit Range Generator Current Meter Magnitude 1 IA 41206 Floa

9440500990 Rev D 221 DECS-250N Modbus™ Communication Group Name Register Type Bytes R/W Unit Range Energy Meter Negative varhour total 41336 Float 4

222 9440500990 Rev D Modbus™ Communication DECS-250N Group Name Register Type Bytes R/W Unit Range Per Unit Meter Vab Pickup 41416 Float 4 R n/a -10

9440500990 Rev D 223 DECS-250N Modbus™ Communication Group Name Register Type Bytes R/W Unit Range AEM Metering Thermocouple 1 Raw Value 41512 Float

8 9440500990 Rev D Controls and Indicators DECS-250N Screen Scrolling The display can be set to automatically scroll through a user-selected lis

224 9440500990 Rev D Modbus™ Communication DECS-250N Name Register Type Bytes R/W Unit Range OEL Scale Enable 41760 Uint32 4 R W n/a Disabled=0 Auxi

9440500990 Rev D 225 DECS-250N Modbus™ Communication Name Register Type Bytes R/W Unit Range UEL Secondary Curve Y5 41828 Float 4 R W kilovar 0 – 1.

226 9440500990 Rev D Modbus™ Communication DECS-250N Name Register Type Bytes R/W Unit Range Field Current Regulation Pre-position Mode 1 42204 Uint

9440500990 Rev D 227 DECS-250N Modbus™ Communication Name Register Type Bytes R/W Unit Range Droop Value 42280 Float 4 R W Percent 0 - 30 L-Drop Val

228 9440500990 Rev D Modbus™ Communication DECS-250N Group Name Register Type Bytes R/W Unit Range PLC Timed Element Settings Logic Timer 7 Output

9440500990 Rev D 229 DECS-250N Modbus™ Communication Group Name Register Type Bytes R/W Unit Range System Configuration DECS Auxiliary Summing Mode

230 9440500990 Rev D Modbus™ Communication DECS-250N Group Name Register Type Bytes R/W Unit Range DECS Control Startup Primary Soft-start Time 4267

9440500990 Rev D 231 DECS-250N Modbus™ Communication Group Name Register Type Sz R/W Unit Range 27P Secondary Mode 43184 Uint32 4 R W n/a Disabled=0

232 9440500990 Rev D Modbus™ Communication DECS-250N Group Name Register Type Sz R/W Unit Range 24 Secondary Definite Time Pickup 1 43282 Float 4 R

9440500990 Rev D 233 DECS-250N Modbus™ Communication Name Register Type Bytes R/W Unit Range AVR Kp Secondary 43854 Float 4 R W n/a 0 - 1000 AVR Ki

9440500990 Rev D 9 DECS-250N Power Inputs Power Inputs Power is applied to two separate inputs: control power and operating power. The control power

234 9440500990 Rev D Modbus™ Communication DECS-250N Name Register Type Bytes R/W Unit Range RMS Generator Volts Phase A to B 47251 Float 4 R n/

9440500990 Rev D 235 DECS-250N Modbus™ Communication Name Register Type Bytes R/W Unit Range Annunciation Status Bit Flags 1 47303 Uint16 2 R n/

236 9440500990 Rev D Modbus™ Communication DECS-250N Name Register Type Bytes R/W Unit Range Reserved 29 47553 Uint16 2 R n/a n/a Auxiliary Inpu

9440500990 Rev D 237 DECS-250N Modbus™ Communication Name Register Type Bytes R/W Unit Range PF Mode Traverse Rate 47637 Float 4 R W Second 10 -

238 9440500990 Rev D Modbus™ Communication DECS-250N Name Register Type Bytes R/W Unit Range AVR Maximum Setpoint 47709 Float 4 R n/a Setpoint a

9440500990 Rev D 239 DECS-250N Modbus™ Communication Name Register Type Bytes R/W Unit Range Index into Table of Gain Constants 47861 Float 4 R

240 9440500990 Rev D Modbus™ Communication DECS-250N Name Register Type Bytes R/W Unit Range Reserved 15 47941 Float 4 R n/a n/a Reserved 16 479

9440500990 Rev D 241 DECS-250N Modbus™ Communication Name Register Type Bytes R/W Unit Range Reserved 16 bit 29 48221-223 Uint16 2 R W n/a 0 - 6

242 9440500990 Rev D Modbus™ Communication DECS-250N

9440500990 Rev D 243 DECS-250N PROFIBUS Communication PROFIBUS Communication On units equipped with the PROFIBUS communication protocol (style xxxxx

10 9440500990 Rev D Power Inputs DECS-250N

244 9440500990 Rev D PROFIBUS Communication DECS-250N DECSCONTROL_IN_FCR_MODE and so on. The three highest bits in this instance are unused and thus

9440500990 Rev D 245 DECS-250N PROFIBUS Communication Table 38. Instance 11 Parameters Instance Name Inst. # Type RW Key Name Range Local Conta

246 9440500990 Rev D PROFIBUS Communication DECS-250N 2. Using PLC configuration software, import the DECS-250N GSD file. This allows the DECS-250N

9440500990 Rev D 247 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Synchronizer Metering Cyclic 5 Float R Slip

248 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Local Contact Inputs Cyclic 10 UINT8 R CONTA

9440500990 Rev D 249 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Gen Metering 16 Float R VAB GG (Gen Voltage

250 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Bus Metering Per Unit 21 Float R bus vavg pu

9440500990 Rev D 251 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Control Panel Status 30 UINT8 R DECSCONTROL

252 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range System Status 31 UINT8 R DECSCONTROL DECS AU

9440500990 Rev D 253 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range AEM Analog Input Meter 34 Float R AnalogInpu

9440500990 Rev D 11 DECS-250N Power Stage Power Stage The DECS-250N supplies regulated dc excitation power to the field of a brushless exciter. Exci

254 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range AEM Analog Input Status 35 UINT8 R AEMPROTEC

9440500990 Rev D 255 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range AEM RTD Input Status 37 UINT8 R AEMCONFIG RT

256 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range AEM RTD Input Status 37 UINT8 R RTDPROTECTIO

9440500990 Rev D 257 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range CEM Output Status 41 UINT8 R CEM OUTPUT 2 O

258 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Config. Prot. Status 44 UINT8 R CONFIGPROT2

9440500990 Rev D 259 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Front Panel Settings 46 UINT32 R LCD Backlig

260 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range System Param 66 Float R/W Rated Field Curr

9440500990 Rev D 261 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range FVR Setpoints 72 Float R/W Exc Vol Setpoint

262 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Aux Input Settings 77 UINT32 R/W Decs Aux S

9440500990 Rev D 263 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Startup 86 Float R/W Startup Sec Soft Start

12 9440500990 Rev D Power Stage DECS-250N

264 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range AVR Gains 88 Float R/W Avr Ki Sec GG No Unit

9440500990 Rev D 265 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Voltage Match Gains 106 Float R/W Vm Ki GG N

266 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range OEL Takeover 112 Float R/W Oel Sec Takeover

9440500990 Rev D 267 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range SCL Settings 120 Float R/W Scl Pri Time Hi G

268 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range OEL Scaling 124 Float R/W Oel Scale Takeover

9440500990 Rev D 269 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range PSS Control Primary 131 UINT32 R/W PssPriSwi

270 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range PSS Filter Parameter Primary Int 135 UINT32

9440500990 Rev D 271 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range PSS Parameter Secondary Filters Int 141 UINT

272 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range PSS Output Limiter Primary 148 Float R/W Pss

9440500990 Rev D 273 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Synchronizer 152 Float R/W Sync Fail Activat

9440500990 Rev D 13 DECS-250N Voltage and Current Sensing Voltage and Current Sensing The DECS-250N senses generator voltage, generator current, and

274 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Bus Condition Detection (Gen Sensing) 158 Fl

9440500990 Rev D 275 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Gen Undervolt 164 Float R/W Pickup PS V 1 -

276 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Reverse Power 173 UINT32 R/W Mode PS No Unit

9440500990 Rev D 277 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Exciter Diode Monitor 184 Float R/W Exciter

278 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Config Prot 1 188 Float R/W Threshold2Pickup

9440500990 Rev D 279 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Config Prot 2 190 Float R/W Threshold2 Activ

280 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Config Prot 3 192 Float R/W Threshold3Pickup

9440500990 Rev D 281 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Config Prot 4 194 Float R/W Threshold3 Activ

282 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Config Prot 5 196 Float R/W Threshold4Pickup

9440500990 Rev D 283 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Config Prot 6 198 Float R/W Threshold4 Activ

9440500990 Rev D i DECS-250N Preface Preface This instruction manual provides information about the installation and operation of the DECS-250N Digi

14 9440500990 Rev D Voltage and Current Sensing DECS-250N Information about configuring the DECS-250N the generator sensing voltage is provided in t

284 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Config Prot 8 201 UINT32 R/W Param Selection

9440500990 Rev D 285 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Remote Analog In 1 203 UINT32 R/W Threshold

286 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Remote Analog In 2 206 Float R/W Arming Dela

9440500990 Rev D 287 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Remote Analog In 3 208 Float R/W Threshold 3

288 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Remote Analog In 4 210 Float R/W Current Max

9440500990 Rev D 289 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Remote Analog In 6 213 UINT32 R/W Threshold

290 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Remote Analog In 7 216 Float R/W Threshold 1

9440500990 Rev D 291 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Remote Analog In 8 218 Float R/W Threshold 4

292 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Remote RTD In 2 221 UINT32 R/W Threshold 3 T

9440500990 Rev D 293 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Remote RTD In 3 224 Float R/W Threshold 4 Ac

9440500990 Rev D 15 DECS-250N Voltage and Current Sensing Note If a machine is taken offline, then the secondary winding of that machine’s cross-cur

294 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Remote RTD In 5 228 Float R/W Threshold 1 Ac

9440500990 Rev D 295 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Remote RTD In 7 231 UINT32 R/W Threshold 3 T

296 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Remote RTD In 8 234 Float R/W Threshold 4 Ac

9440500990 Rev D 297 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Remote TC In 2 238 Float R/W Threshold 3 Pic

298 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Remote Analog Out 2 241 UINT32 R/W Param Sel

9440500990 Rev D 299 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range Remote Analog Out 3 243 UINT32 R/W Param Sel

300 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Remote Analog Out 4 245 UINT32 R/W Param Sel

9440500990 Rev D 301 DECS-250N PROFIBUS Communication Instance Name Inst. # Type RW Key Name Unit Range User Programmable Alarms 248 Float R/W Prog

302 9440500990 Rev D PROFIBUS Communication DECS-250N Instance Name Inst. # Type RW Key Name Unit Range Logic Timers 250 Float R/W Logic Timer 12 Ou

9440500990 Rev D 303 DECS-250N Maintenance Maintenance Warning! These servicing instructions are for use by qualified personnel only. To reduce the

16 9440500990 Rev D Voltage and Current Sensing DECS-250N

304 9440500990 Rev D Maintenance DECS-250N Troubleshooting The following troubleshooting procedures assume the excitation system components are

9440500990 Rev D 305 DECS-250N Maintenance d. Accessory inputs (should be zero) e. Var/PF and droop (should be disabled) If the problem persists,

306 9440500990 Rev D Maintenance DECS-250N

9440500990 Rev D 307 DECS-250N Specifications Specifications DECS-250N electrical and physical characteristics are listed in the following paragraph

308 9440500990 Rev D Specifications DECS-250N DC Input Nominal Input ... 125 Vdc Input Range ...

9440500990 Rev D 309 DECS-250N Specifications Accessory Inputs Current Input Range ... 4 to 20 mAdc Burd

310 9440500990 Rev D Specifications DECS-250N RS-485 Type ... RS-485, half duplex Interface ...

9440500990 Rev D 311 DECS-250N Specifications Relay Output 10 ... RLY 10, RLY 10 Relay Output 11 ...

312 9440500990 Rev D Specifications DECS-250N Steady-State Stability ... ±0.25% at rated PF with constant generator frequency an

9440500990 Rev D 313 DECS-250N Specifications Overfrequency (81O) and Underfrequency (81U) Pickup Range ...

9440500990 Rev D 17 DECS-250N Synchronizer Synchronizer DECS-250N controllers with a style number of xxxxAxx are equipped with an automatic synchron

314 9440500990 Rev D Specifications DECS-250N Loss of PMG Pickup Single-Phase Source ... <10 Vac Three-Phase Source ...

9440500990 Rev D 315 DECS-250N Specifications Maximum Field Flash Time Range ... 1 to 50 s Increment ...

316 9440500990 Rev D Specifications DECS-250N Data Logging (Oscillography) Up to 6 variables can be logged. The sampling rate is 1,200 data points p

9440500990 Rev D 317 DECS-250N Specifications to +120°C (–148 to +248°F)), vibration tests (of 5 to 45 G at +20°C (68°F)), and temperature/vibration

318 9440500990 Rev D Specifications DECS-250N EAC Mark (Eurasian Conformity) • TP TC 004/2011 • TP TC 020/2011

9440500990 Rev D 319 DECS-250N Analog Expansion Module Analog Expansion Module General Information The optional AEM-2020 is a remote auxiliary devic

320 9440500990 Rev D Analog Expansion Module DECS-250N Communication Interface The AEM-2020 communicates with the DECS-250N through CAN1. CAN Bus Di

9440500990 Rev D 321 DECS-250N Analog Expansion Module CE Compliance This product has been evaluated and complies with the relevant essential requir

322 9440500990 Rev D Analog Expansion Module DECS-250N Figure 168. AEM-2020 Overall Dimensions Connections Analog Expansion Module connections are

9440500990 Rev D 323 DECS-250N Analog Expansion Module Connectors and headers may contain tin- or gold-plated conductors. Tin-plated conductors are

18 9440500990 Rev D Synchronizer DECS-250N this percentage. This setting also appears on the Voltage Matching screen, below. When the value is chang

324 9440500990 Rev D Analog Expansion Module DECS-250N Figure 169. Input and Output Terminals Table 43. Input and Output Terminals Connector Descr

9440500990 Rev D 325 DECS-250N Analog Expansion Module Figure 170. Analog Inputs - Voltage Input Connections Figure 171. Analog Inputs - Current

326 9440500990 Rev D Analog Expansion Module DECS-250N External RTD Input Connections External 2-wire RTD input connections are shown in Figure 172.

9440500990 Rev D 327 DECS-250N Analog Expansion Module Note 1. If the AEM-2020 is providing one end of the J1939 bus, a 120 Ω, ½ watt terminating

328 9440500990 Rev D Analog Expansion Module DECS-250N Communications BESTCOMSPlus Navigation Path: Settings, Communications, CAN bus, Remote Module

9440500990 Rev D 329 DECS-250N Analog Expansion Module Figure 177. Remote Analog Input Settings

330 9440500990 Rev D Analog Expansion Module DECS-250N damaged RTD input wire. When enabled, Stop Mode InhibitE turns off RTD input protection when

9440500990 Rev D 331 DECS-250N Analog Expansion Module Each thermocouple input can be independently configured for over or under modeE to annunciate

332 9440500990 Rev D Analog Expansion Module DECS-250N Figure 180. Remote Analog Output Settings

9440500990 Rev D 333 DECS-250N Analog Expansion Module RTD Inputs BESTCOMSPlus Navigation Path: Metering, Status, Inputs, Remote RTD Inputs HMI Navi

9440500990 Rev D 19 DECS-250N Synchronizer

334 9440500990 Rev D Analog Expansion Module DECS-250N Figure 184. Remote Analog Input Values Metering When connected to a DECS-250N, the Calibrate

9440500990 Rev D 335 DECS-250N Analog Expansion Module Analog Outputs BESTCOMSPlus Navigation Path: Metering, Status, Outputs, Remote Analog Outputs

336 9440500990 Rev D Analog Expansion Module DECS-250N

9440500990 Rev D 337 DECS-250N Contact Expansion Module Contact Expansion Module General Information The optional CEM-2020 is a remote auxiliary dev

338 9440500990 Rev D Contact Expansion Module DECS-250N Vibration Swept over the following ranges for 12 sweeps in each of three mutually perpendicu

9440500990 Rev D 339 DECS-250N Contact Expansion Module Physical Weight CEM-2020 ... 2.25 lb (1.02 kg) CEM-2020H ...

340 9440500990 Rev D Contact Expansion Module DECS-250N Figure 187. CEM-2020 Overall Dimensions See Figure 188 for CEM-2020H overall dimensions. A

9440500990 Rev D 341 DECS-250N Contact Expansion Module Figure 188. CEM-2020H Overall Dimensions Connections Contact Expansion Module connections a

342 9440500990 Rev D Contact Expansion Module DECS-250N Caution By mating conductors of dissimilar metals, galvanic corrosion could occur which dete

9440500990 Rev D 343 DECS-250N Contact Expansion Module Figure 189. CEM-2020 Input Contact and Output Contact Terminals

20 9440500990 Rev D Synchronizer DECS-250N the DECS-250N when issuing open and close commands to the breaker. When setting the pulse times, the open

344 9440500990 Rev D Contact Expansion Module DECS-250N Figure 190. CEM-2020H Input Contact and Output Contact Terminals CAN bus Interface These t

9440500990 Rev D 345 DECS-250N Contact Expansion Module Note 1. If the CEM-2020 is providing one end of the J1939 bus, a 120 Ω, ½ watt terminating

346 9440500990 Rev D Contact Expansion Module DECS-250N Communications BESTCOMSPlus Navigation Path: Settings, Communications, CAN bus, Remote Modul

9440500990 Rev D 347 DECS-250N Contact Expansion Module Figure 194. Remote Contact Inputs Settings Contact Outputs BESTCOMSPlus Navigation Path: Se

348 9440500990 Rev D Contact Expansion Module DECS-250N Metering Contact Inputs BESTCOMSPlus Navigation Path: Metering, Status, Inputs, Remote Conta

9440500990 Rev D 349 DECS-250N Revision History Revision History Table 47 provides a historical summary of the changes made to the DECS-250N hardwar

350 9440500990 Rev D Revision History DECS-250N Firmware Version and Date Change 1.03.00, Feb-15 • Added Chinese language • Added Generator/Moto

9440500990 Rev D 351 DECS-250N Revision History Software Version and Date Change 3.07.03, Jan-15 • Modified autotuning 3.08.00, Feb-15 • Added sup

352 9440500990 Rev D Revision History DECS-250N

9440500990 Rev D 21 DECS-250N Synchronizer Generator Condition A dead generator is recognized by the DECS-250N when the generator voltage decreases

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.

22 9440500990 Rev D Synchronizer DECS-250N Figure 13. Generator and Bus Condition Detection Settings

9440500990 Rev D 23 DECS-250N Synchronizer

ii 9440500990 Rev D Preface DECS-250N 12570 State Route 143 Highland IL 62249-1074 USA www.basler.com [email protected] Tel: +1 618.654.2341 Fa

24 9440500990 Rev D Synchronizer DECS-250N

9440500990 Rev D 25 DECS-250N Regulation Regulation The DECS-250N precisely regulates the level of supplied excitation power in each of the five ava

26 9440500990 Rev D Regulation DECS-250N • The BESTCOMSPlus Control Panel screen (available in the BESTCOMSPlus Metering Explorer) • A raise or l

9440500990 Rev D 27 DECS-250N Regulation Power Factor When operating in Power Factor (PF) mode, the DECS-250N controls the var output of the generat

28 9440500990 Rev D Regulation DECS-250N inactive setpoint at the pre-position value and override the tracking function. A portion of the pre-positi

9440500990 Rev D 29 DECS-250N Regulation Operation with Paralleled Generators BESTCOMSPlus Navigation Path: Settings Explorer, Operating Settings, P

30 9440500990 Rev D Regulation DECS-250N ID number to share load with the currently connected DECS-250N. It is not necessary for the Load Share ID t

9440500990 Rev D 31 DECS-250N Regulation Figure 19. Paralleled Generators and Line Drop Compensation Settings

32 9440500990 Rev D Regulation DECS-250N The following examples demonstrate the advantages of internal tracking: • If the excitation system is oper

9440500990 Rev D 33 DECS-250N Auxiliary Control Auxiliary Control BESTCOMSPlus Navigation Path: Settings Explorer, Operating Settings, Auxiliary Inp

9440500990 Rev D iii DECS-250N Preface This product contains, in part, open source software (software licensed in a way that ensures freedom to run,

34 9440500990 Rev D Auxiliary Control DECS-250N AVR Mode In AVR mode, the auxiliary control signal is multiplied by the AVR gain settingC. The resul

9440500990 Rev D 35 DECS-250N Auxiliary Control A Input Type: Select Voltage or Current. B Inp

36 9440500990 Rev D Auxiliary Control DECS-250N

9440500990 Rev D 37 DECS-250N Contact Inputs and Outputs Contact Inputs and Outputs Sixteen isolated, contact sensing inputs are available for initi

38 9440500990 Rev D Contact Inputs and Outputs DECS-250N Figure 23. Contact Input Label Text

9440500990 Rev D 39 DECS-250N Contact Inputs and Outputs Figure 24. Contact Output Label Text

40 9440500990 Rev D Contact Inputs and Outputs DECS-250N

9440500990 Rev D 41 DECS-250N Protection Protection The DECS-250N offers protection relating to generator voltage, frequency, power, field parameter

42 9440500990 Rev D Protection DECS-250N Figure 25. V/Hz Characteristic – Time Shown on Vertical Axis Figure 26. V/Hz Characteristic – Time Shown

9440500990 Rev D 43 DECS-250N Protection Figure 27. Overexcitation Protection Settings A Defin

iv 9440500990 Rev D Revision History DECS-250N

44 9440500990 Rev D Protection DECS-250N Generator Overvoltage An overvoltage pickup condition occurs when the sensed generator terminal voltage inc

9440500990 Rev D 45 DECS-250N Protection A Voltage Balanced Level: Adjustable from 0 to 100% i

46 9440500990 Rev D Protection DECS-250N Figure 32. Underfrequency Protection Settings A Under

9440500990 Rev D 47 DECS-250N Protection pickup response is illustrated in Figure 34. BESTCOMSPlus settings are described below and shown in Figure

48 9440500990 Rev D Protection DECS-250N Figure 35. Loss of Excitation Protection Settings A P

9440500990 Rev D 49 DECS-250N Protection during overexcitation. The field current must fall below the dropout ratio (95%) for the function to begin

50 9440500990 Rev D Protection DECS-250N Figure 37. Field Overcurrent Protection Settings A F

9440500990 Rev D 51 DECS-250N Protection Note If the number of poles for the exciter armature and the generator rotor is unknown, the EDM function w

52 9440500990 Rev D Protection DECS-250N Figure 38. Exciter Diode Monitor Protection Settings

9440500990 Rev D 53 DECS-250N Protection selected power input configurationC is shown as a read-only value. Power input failure pickup and trip elem

9440500990 Rev D v DECS-250N Contents Contents Introduction ...

54 9440500990 Rev D Protection DECS-250N Figure 40. Sync-Check Protection Settings A Sync-Chec

9440500990 Rev D 55 DECS-250N Protection • Kilovarhours • Kilowatthours • Negative Sequence Current • Negative Sequence Voltage • Positive Sequ

56 9440500990 Rev D Protection DECS-250N Figure 41. Configurable Protection Settings A Label T

9440500990 Rev D 57 DECS-250N Limiters Limiters DECS-250N limiters ensure that the controlled machine does not exceed its capabilities. Overexcitati

58 9440500990 Rev D Limiters DECS-250N Figure 43. Summing Point, Online, Overexcitation Limiting The online, low-level OEL threshold is determined

9440500990 Rev D 59 DECS-250N Limiters Figure 44. Inverse Time Characteristic for Takeover OEL Primary and secondary setting groups provide additi

60 9440500990 Rev D Limiters DECS-250N Figure 45. OEL Configuration Settings Figure 46. Summing Point OEL Settings

9440500990 Rev D 61 DECS-250N Limiters Figure 47. Takeover OEL Settings A OEL Enable: Select c

62 9440500990 Rev D Limiters DECS-250N UEL operates in all regulation modes. UEL behavior in manual mode can be configured to limit excitation or is

9440500990 Rev D 63 DECS-250N Limiters Figure 49. UEL Custom Curve Screen A UEL Configuration

vi 9440500990 Rev D Contents DECS-250N Power Factor ...

64 9440500990 Rev D Limiters DECS-250N Figure 50. Stator Current Limiting Low-Level Limiting When the stator current exceeds the low-level settingB

9440500990 Rev D 65 DECS-250N Limiters Var Limiter BESTCOMSPlus Navigation Path: Settings Explorer, Operating Settings, Limiters, var HMI Navigation

66 9440500990 Rev D Limiters DECS-250N Figure 53. Limiter Scaling Settings A OEL and SCL Scale

9440500990 Rev D 67 DECS-250N Limiters Figure 54. Typical Underfrequency Compensation Curve Volts per Hertz The volts per hertz limiter prevents th

68 9440500990 Rev D Limiters DECS-250N Figure 56. Underfrequency/Volts per Hertz Limiter Settings

9440500990 Rev D 69 DECS-250N Metering Metering The DECS-250N provides comprehensive metering of internal and system conditions. These capabilities

70 9440500990 Rev D Metering DECS-250N Dragging the blue square anywhere other than one of the arrow/tab boxes places the selected metering screen a

9440500990 Rev D 71 DECS-250N Metering Figure 59. Power Primary-Values Figure 60. Energy When operating in motor mode, values for var and power f

72 9440500990 Rev D Metering DECS-250N Figure 61. Bus Primary-Values Metering Field BESTCOMSPlus Navigation Path: Metering Explorer, Field HMI Navi

9440500990 Rev D 73 DECS-250N Metering Figure 63. PSS Primary-Values Metering Synchronization BESTCOMSPlus Navigation Path: Metering Explorer, Sync

9440500990 Rev D vii DECS-250N Contents Underexcitation Limiter ...

74 9440500990 Rev D Metering DECS-250N The metered setpoint tracking error between DECS-250N operating modes is displayed on the Tracking metering s

9440500990 Rev D 75 DECS-250N Metering the FVR indicator changes from gray to green. FCR mode is selected by clicking the FCR button. FVR mode is se

76 9440500990 Rev D Metering DECS-250N Figure 68. Metering Summary Screen Status Indication Status indication is provided for DECS-250N system func

9440500990 Rev D 77 DECS-250N Metering Figure 69. System Status Indication Screen Inputs BESTCOMSPlus Navigation Path: Metering Explorer, Status, I

78 9440500990 Rev D Metering DECS-250N Figure 70. DECS-250N Contact Inputs Status Indication Screen CEM-2020 Contact Inputs The status of the 10 co

9440500990 Rev D 79 DECS-250N Metering Figure 71. DECS-250 Contact Outputs Status Indication Screen Network Load Share The screen shown in Figure 7

80 9440500990 Rev D Metering DECS-250N Figure 73. Configurable Protection Indication Status Screen Alarms BESTCOMSPlus Navigation Path: Metering E

9440500990 Rev D 81 DECS-250N Metering AEM Input 6 Threshold 4 Trip AEM Input 7 Out of Range AEM Input 7 Threshold 1 Trip AEM Input 7 Threshold 2 Tr

82 9440500990 Rev D Metering DECS-250N RTD Input 7 Out of Range RTD Input 7 Threshold 1 Trip RTD Input 7 Threshold 2 Trip RTD Input 7 Threshold 3 Tr

9440500990 Rev D 83 DECS-250N Metering Each alarm provides a logic output that can be connected to a physical output or other logic input using BEST