Schweitzer Engineering Laboratories SEL-701

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Date Code 20010719

701 Motor Protection Relay

SEL

OGIC

Control Equations & Relay Logic

Selected Relay Logic Diagrams

B.33

Figure B.11 Current Unbalance Element Logic.

Avg.

|IA|

|IB|

|IC|

lav

FLA

46UBA

46UBT

%UB = (|Iav-lm|/FLA) • 100%

Enable

%UB = (|Iav-lm|/lav) • 100%

46UBA

46UBT

Relay

Word

Bits

46UBAD

Settings

Max.Dev.

• 0.25

Enable

46UBTD

Inputs

IA =

IB =

IC =

FLA =

46UBA =

46UBT =

Avg. =

Iav =

Im =

46UBAD =

46 UBTD =

Phase Current

Full Load Amps Setting

Phase Current Unbalance Alarm Setting

Phase Current Unbalance Trip Setting

Average

Average Phase Current Magnitude

Magnitude of Current Having Max. Deviation From Iav

Phase Current Unbalance Alarm Delay

Phase Current Unbalance Trip Delay

Main Page

Table of Contents3
List of Tables7
List of Figures13
Introduction17
List of Examples19
Manual Change Information21
Section 1: Introduction & Specifications23
- Introduction23
- Typographic Conventions25
- Table 1.125
- SEL-701 Relay Models26
- Table 1.226
- Figure 1.1 SEL-701 Relay Functional Description26
- SEL-701 Relay Applications27
- Figure 1.2 SEL-701 Relay Applications27
- SEL-701 Relay Protection Features28
- SEL-701 Relay Monitoring & Reporting Features29
- Relay Part Number30
- SEL-701 Relay Part Number Creation Table30
- SEL-701 Relay Serial Number Label32
- Figure 1.3 SEL-701 Relay Serial Number Label32
- Specifications33
Section 2: Installation37
- Panel Cut & Drill Plans37
- Figure 2.1 SEL-701 Relay38
- Section 2: Installation39
- Figure 2.2 SEL-701 Relay Cut and Drill Dimensions39
- Relay Mounting40
- Figure 2.3 SEL-701 Relay Panel Mounting Detail40
- Relay Rear-Panel Diagram41
- Figure 2.4 SEL-701 Relay Rear Panel41
- Figure 2.5 SEL-701 Relay Left- and Right-Side Panel Drawings42
- Example AC Wiring Diagrams43
- Figure 2.6 Example AC Wiring Diagram, Four-Wire Wye Voltages and Ground43
- Figure 2.7 Example AC Wiring Diagram, Open-Delta Voltages and Residual in Connection44
- Figure 2.8 Example AC Voltage Wiring Diagram, Single Phase-To-Phase Voltage45
- Figure 2.9 Example AC Voltage Wiring Diagram, Single Phase-To-Neutral Voltage45
- Relay Connections46
- SEL-2600 RTD Module60
Section 3: SEL-701PC Software61
- Introduction61
- System Requirements62
- Table62
  - SEL-701PC Software System Requirements62
- Installation63
Section 4: Settings Calculation65
- Introduction65
- Application Data67
- General Data68
  - Identifier Settings68
  - Table 4.168
- CT Configuration Settings68
  - Figure 4.1 Phase Rotation Settings69
  - Phase Rotation, Nominal Frequency Settings69
  - Table 4.369
  - Table 4.470
  - VT Configuration Settings70
- Basic Motor Protection72
  - Table 4.573
  - Thermal Element Configuration Settings, Setting Method = RATING73
  - Table 4.675
  - Thermal Element Configuration Settings, Setting Method = GENERIC75
  - Figure 4.2 Generic Thermal Limit Curves, Cold Motor77
  - Figure 4.3 3000 HP Example Motor Cold Thermal Limit Curve83
  - Figure 4.4 Ground Fault Currents Using a Window88
- RTD-Based Protection94
- Table 4.23 RTD Location Settings95
- Table 4.24 RTD Type Settings96
- Table 4.25 RTD Alarm and Trip Temperature Settings97
- Table 4.26 RTD Resistance Versus Temperature100
- Voltage-Based Protection (Relay Models 0701001X & 0701011X)101
- Table 4.28 Under- and Overvoltage Settings, Phase-To-Neutral Potentials102
- Table 4.30 Underpower Element Settings103
- Table 4.31 Power Factor Element Settings104
- Table 4.32 Frequency Element Settings105
- Output Configuration106
- Table 4.34 Front-Panel Configuration Settings107
- Table 4.35 Display Message Settings108
- Table 4.36 Output Contact Fail-Safe Trip Duration, and Starting Lockout Settings109
- Table 4.38 Factory Logic Settings110
- Figure 4.5 Factory Tripping Logic111
- Figure 4.6 Factory Contact Output Logic112
- Figure 4.7 Factory Contact Input Logic112
- Figure 4.8 Factory Event Triggering Logic113
- Serial Port Settings114
- Table 4.40 SET P Rear-Panel Serial Port Settings, Protocol = MOD115
- Sequential Events Recorder (SER) Settings116
- Table 4.42 Default SER Trigger Setting Relay Word Bits Definitions117
- Table 4.43 SET R SER Enable Alias Settings119
- Table 4.44 SET R SER Alias Settings120
Section 5: Front-Panel Operation121
- Front-Panel Layout121
- Figure 5.1 SEL-701 Relay Front Panel121
- Normal Front-Panel Display122
- Figure 5.2 Default Meter Display Screen122
- Figure 5.3 Default Display Message Screen122
- Front-Panel Automatic Messages123
- Table 5.1123
- Front-Panel Menus & Operations124
  - Figure 5.4 Front-Panel Pushbuttons124
  - Figure 5.5 Access Level Security Padlock Symbol125
  - Front-Panel Pushbutton Functions125
  - Table 5.2125
  - Figure 5.6 Password Entry Screen126
- Front-Panel Main Menu128
- Figure 5.7 Activate Front-Panel Display128
- Figure 5.8 Front-Panel Main Menu128
- Figure 5.9 Main Menu: Start Motor Function129
- Figure 5.10 Main Menu: Emergency Restart Function129
- Figure 5.11 Main Menu: Stop Motor Function129
- Figure 5.12 Main Menu: Reset Trip/Targets Function130
- Figure 5.13 Main Menu: Set Relay Function130
- Figure 5.14 Set Relay\Relay Elements Function131
- Figure 5.15 Set Relay\Ser Setting Categories132
- Figure 5.16 Set Relay\Front Serial Port Settings133
- Figure 5.17 Set Relay\Rear Serial Port Settings134
- Figure 5.18 Set Relay\Date Function134
- Figure 5.19 Set Relay\Time Function135
- Figure 5.20 Set Relay\Password Function135
- Figure 5.21 Main Menu: Meter Values Function136
- Figure 5.22 Meter Values Display Functions136
- Figure 5.23 Meter Values Reset Functions137
- Figure 5.24 Main Menu: History Data Function137
- Figure 5.25 History Data\Display History Function137
- Figure 5.26 History Data\Clear History Function138
- Figure 5.27 Main Menu: Motor Statistics Function138
- Figure 5.28 Motor Statistics\Motor Use Data Function138
- Figure 5.29 Motor Statistics\Average and Peak Data Function139
- Figure 5.30 Motor Statistics\Trip and Alarm Data Function139
- Figure 5.31 Motor Statistics\Reset Statistics Function140
- Figure 5.32 Main Menu: Status of Relay Function140
- Figure 5.33 Main Menu: View Relay Word Function141
- Figure 5.34 Main Menu: Pulse out Contact Function141
- Figure 5.35 Pulse Output Contact Menu Function141
- Figure 5.36 Main Menu: Reset Thermal Model Function142
- Figure 5.37 Main Menu: Reset Learned Param Function142
- Figure 5.38 Reset Learned Param\Reset Cooling Time Function142
- Figure 5.39 Reset Learned Param\Reset Start Therm Cap Function143
Section 6: ASCII Serial Port Operation145
- Introduction145
- You will Need146
- Connect Your PC to the Relay147
- Configure Your Terminal Emulation Software149
  - SEL-701 Relay Serial Communication Default Settings149
  - Table 6.2149
- Using Terminal Commands150
- Table 6.3150
- Serial Port Access Levels151
- Command Summary152
  - SEL-701 Serial Port Command Summary152
  - Table 6.4152
- Command Explanations154
- Figure 6.3 HELP Command Response154
- Figure 6.4 2AC Command Example155
- Figure 6.5 ANA Command Example155
- Table156
- EVE Command Examples157
- Serial Port Automatic Messages176
Section 7: Commissioning177
- Introduction177
- Relay Commissioning Procedure178
- Selected Functional Tests184
- 100-Ohm Platinum RTD Type (Rtds 7-12)192
- Table 7.10 120-Ohm Nickel RTD Type (Rtds 1–6)193
- Table 7.12 100-Ohm Nickel RTD Type (Rtds 1–6)194
- Table 7.14 10-Ohm Copper RTD Type (Rtds 1–6)195
- Table 7.16 Power Measuring Accuracy Test Values, Wye Voltages196
- Table 7.17 Power Measuring Accuracy Test Values, Delta Voltages197
Section 8: Metering & Monitoring199
- Introduction199
- Max/Min Recorded Values201
- Energy Meter Values203
- Power Measurement Conventions204
- Figure 8.1 Power Measurement Conventions204
- Load Profiling205
- Motor Operating Statistics207
- Figure 8.3 MOTOR Command Example209
- Motor Start Report210
- Figure 8.4 Motor Start Report Example211
- Motor Start Trending212
- Figure 8.5 Motor Start Trending Report Example212
Section 9: Event Analysis213
- Introduction213
- Front-Panel Target Leds214
  - SEL-701 Relay Front-Panel Target LED Definitions214
  - Table 9.1214
- Front-Panel Messages216
- History Data & Event Summaries217
- Event Reports219
  - Event Commands220
  - Table 9.2220
- EVE Command Options220
- Sequential Events Recorder (SER) Report225
  - Retrieving SER Reports225
  - Table 9.6225
- Example Event Report228
- Figure 9.1 Example Event Report229
- Example Sequential Events Recorder (SER) Report230
- Figure 9.2 Example Sequential Events Recorder (SER) Event Report230
- Table 9.7 Example Sequential Events Recorder (SER) Report Explanations231
Section 10: Maintenance & Troubleshooting233
- Routine Maintenance Checks233
- Table 10.1 Data Capture234
- Self-Testing235
- Troubleshooting Procedure238
- Table 10.6 Relay Does Not Respond to Command from Device Connected to Serial Port239
- Power Supply Fuse Replacement240
- Real-Time Clock Battery Replacement241
- Firmware Upgrade Installation242
- Factory Assistance245
Table A.1 SEL-701 Relay Firmware Versions247
Appendix A Firmware Versions247
Ogic247
- Appendix B: SEL OGIC Control Equations & Relay Logic249
- Introduction249
- Relay Functional Overview250
- Relay Word Bits252
Table B.2 Relay Word Bit Definitions for SEL-701253
- SEL OGIC Control Equations257
- Figure B.2 Result of Falling-Edge Operator on a Deasserting Underfrequency Element258
- Factory Default Logic Settings261
- Front-Panel Display Message Configuration263
- Nondedicated SEL OGIC Control Equation Variable Settings264
- Figure B.3 SEL OGIC Control Equation Variable Timer Logic264
- Latch Control Switch Settings265
- Figure B.4 Traditional Latching Relay265
- Figure B.5 Latch Control Switches Drive Latch Bits LT1 through LT4265
- Stop/Trip Logic267
- Breaker Auxiliary Contact SEL OGIC Control Equation Setting270
- Start and Emergency Restart Logic271
- Figure B.7 Start Logic271
- ACCESS2 SEL OGIC Control Equation Setting273
- TARR SEL OGIC Control Equation Setting274
- Speed Switch SEL OGIC Control Equation Setting275
- Event Triggering SEL OGIC Control Equation276
- Contact Output Control277
- Remote Control Switches278
- Figure B.8 Remote Control Switches Drive Remote Bits RB1 through RB4278
- Selected Relay Logic Diagrams280
- Figure B.9 Undervoltage Element Logic280
- Figure B.10 Underpower Element Logic280
- Figure B.12 Phase Reversal Element Logic282
- Figure B.13 Overcurrent Element Logic283
- Figure B.14 Power Factor Elements Logic284
- Figure B.15 Overvoltage Element Logic285
- Figure B.17 Load-Jam Elements Logic288
- Figure B.18 Load-Loss Logic; no Voltage Option288
- Figure B.19 Load-Loss Logic; Voltage Option Included289
- Figure B.20 Reactive Power Elements Logic290
- Figure B.21 Speed Switch Tripping Logic290
Appendix C: Modbus291
- RTU Communications Protocol291
- Introduction291
- Modbus RTU Communications Protocol291
Table C.2 SEL-701 Relay Modbus Function Codes293
- 01H Read Coil Status Command295
- 02H Read Input Status Command296
- 03H Read Holding Registers Command297
- 04H Read Input Registers Command298
- 05H Force Single Coil Command299
- 06H Preset Single Register Command300
- 07H Read Exception Status Command301
- 08H Loopback Diagnostic Command302
- 10H Preset Multiple Registers Command303
- Controlling Output Contacts & Remote Bits Using Modbus304
Table C.15 Modbus Command Codes305
- Reading the Relay Status Using Modbus306
- User-Defined Modbus Data Region307
- Reading Event Data Using Modbus308
Table C.17 Assign Event Report Channel Using Address 0392H308
- Modbus Register Map309
Table C.18 Modbus Register Map309
Appendix Dsel-2020/2030 & SEL-701PC Compatibility Features347
- Introduction347
- Fast Binary Message Lists348
- Fast Binary Message Definitions349
Table D.4 A5C1 Fast Meter Configuration Block350
Table D.5 A5D1 Fast Meter Data Block355
- Demand Fast Meter Configuration Messages356
- Table D.7 A5D2/A5D3 Demand/Peak Demand Fast Meter Message359
- Table D.8 A5CE Fast Operate Configuration Block360
- Table D.9 A5E0 Command362
- Table D.10 A5E3 Command363
- Compressed ASCII Commands365
- CASCII Command366
- CSTATUS Command370
- CHISTORY Command371
- CEVENT Command372
- CME E Command374
- CME M Command375
- CME T Command XXXXXX376
Appendix E Motor Thermal Element377
- Introduction377
- Purpose of Motor Thermal Protection379
- Figure E.1 Motor Thermal Limit Characteristic Plotted with Motor Starting Current380
- The Basic Thermal Element381
- Figure E.2 Electrical Analog of a Thermal System381
- Figure E.3 Typical Induction Motor Current, Torque, and Rotor Resistance Versus Slip382
- Motor Starting Protection384
- Figure E.4 Motor Starting Thermal Element384
- Motor Running Protection385
- Figure E.5 Motor Running Thermal Element with Resistance and Trip Level Undefined385
- Figure E.6 Calculating the Normal Operating Energy Using Locked Rotor Trip Times385
- Figure E.7 Motor Running Thermal Element386
- Interpreting Percent Thermal Element Capacity Values388
- Motor Starting Thermal Capacity389
- Appendix F: SEL-701 Relay Settings Sheets443
Glossary443
Index453

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