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Introduction 1.3 Characteristics Differential Protection for Mini-Busbars and Short Lines Busbar Protection 24 • Tripping characteristic with current restraint • Short tripping time • Insensitivity to DC components and current transformer saturation • High level of stability even with different degrees of current transformer saturation • Monitoring of the current connections with operation currents • Single-phase differential protection for a busbar with up to 7 or 9 or 12 feeders (depending on the variant ordered) • Either one relay per phase or one relay connected via interposed summation current transformers • Tripping characteristic with current restraint • Short tripping time • Insensitivity to DC components and current transformer saturation • High level of stability even with different degrees of current transformer saturation • Monitoring of the current connections with operation currents. Earth Fault Differential Protection • Earth fault protection for earthed transformer windings, generators, motors, shunt reactors, or starpoint formers • Short command duration • High sensitivity for earth faults within the protected zone • High stability against external earth faults using the magnitude and phase relationship of through-flowing earth current. • 2 restricted earth fault protection functions possible (only 7UT613/63x) High-impedance Unit Protection • Highly sensitive fault current detection using a common (external) burden resistor • Short tripping time • Insensitive against DC components and current transformer saturation • High stability with optimum matching • Suitable for earth fault detection on earthed generators, motors, shunt reactors, and transformers, including auto-transformers, with or without earthed starpoint. • Suitable for any voltage measurement (via the resistor current) for application of high-impedance unit protection Tank Leakage Protection • For transformers or reactors the tank of which is installed isolated or with high resistance • Monitoring of the current flowing between the tank and ground • Can be connected via a „normal“ current input of the device or the special highly sensitive current input (3 mA smallest setting). <strong>SIPROTEC</strong>, 7UT6x, Manual C53000-G1176-C230-2, Release date 06.2012
Time Overcurrent Protection for Phase Currents and Residual Current <strong>SIPROTEC</strong>, 7UT6x, Manual C53000-G1176-C230-2, Release date 06.2012 Introduction 1.3 Characteristics • Two definite time delayed overcurrent stages for each of the phase currents and the residual (threefold zero sequence) current, can be assigned to any of the sides of the protected object or to any measuring point • Additionally, one inverse time delayed overcurrent stage for each of the phase currents and the residual current • Selection of various inverse time characteristics of different standards is possible, alternatively a user defined characteristic can be specified • The stages can be combined as desired, different characteristics can be selected for phase currents on the one hand and the residual current on the other • External blocking facility for any stage (e.g. for reverse interlocking) • Instantaneous tripping possible at any stage when closing onto a short-circuit • Inrush restraint using the second harmonic of the measured current • Dynamic switchover of the time overcurrent protection settings, e.g. during cold-load start-up of the power plant • 3 time overcurrent protection functions each for phase currents and zero sequence current possible (only 7UT613/63x) Time Overcurrent Protection for Earth Current • Two definite time delayed overcurrent stages for the earth current, e.g. current between starpoint and earth • Additionally, one inverse time delayed overcurrent stage for the earth current • Selection of various inverse time characteristics of different standards is possible, alternatively a user defined characteristic can be specified • The three can be combined as desired • External blocking facility for any desired stage (e.g. for reverse interlocking) • Instantaneous trip when switching on a dead fault with any desired stage • Inrush restraint function with 2nd harmonic • Dynamic switchover of the time overcurrent parameters, e.g. during cold-loaded start-up of the power plant • 2 time overcurrent protection functions for earth current possible (only 7UT613/63x) 1-phase Overcurrent Protection • Two definite time delayed overcurrent stages which can be combined as desired • For any 1-phase overcurrent detection • Can be assigned to the „normal “1-phase current input or to the highly sensitive current input • Suitable for detection of very small current (e.g. for high-impedance unit protection or tank leakage protection) • Suitable for detection of any desired AC voltage using an external series resistor (e.g. for high-impedance unit protection) • External blocking facility for any stage 25
Page 1 and 2: SIPROTEC Differential Protection 7U
Page 4 and 5: Preface Additional Support Training
Page 6 and 7: Preface Typographic and Symbol Conv
Page 8 and 9: Preface 8 SIPROTEC, 7UT6x, Manual C
Page 10 and 11: Contents 10 2.2 Differential Protec
Page 12 and 13: Contents 12 2.14 Undervoltage Prote
Page 14 and 15: Contents 14 2.23 Average Values, Mi
Page 16 and 17: Contents A Appendix. . . . . . . .
Page 18 and 19: Introduction 1.1 Overall Operation
Page 20 and 21: Introduction 1.1 Overall Operation
Page 22 and 23: Introduction 1.2 Application Scope
Page 26 and 27: Introduction 1.3 Characteristics Un
Page 28 and 29: Introduction 1.3 Characteristics Ex
Page 30 and 31: Introduction 1.3 Characteristics 30
Page 32 and 33: Functions 2.1 General 2.1 General 3
Page 34 and 35: Functions 2.1 General 2.1.1.3 Infor
Page 36 and 37: Functions 2.1 General 2.1.3 Configu
Page 38 and 39: Functions 2.1 General Differential
Page 40 and 41: Functions 2.1 General Single-phase
Page 42 and 43: Functions 2.1 General Undervoltage
Page 44 and 45: Functions 2.1 General 44 Addr. Para
Page 46 and 47: Functions 2.1 General 2.1.4 Power S
Page 48 and 49: Functions 2.1 General 48 Figure 2-2
Page 50 and 51: Functions 2.1 General 50 Note If yo
Page 52 and 53: Functions 2.1 General Special Consi
Page 54: Functions 2.1 General 54 Current co
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Page 61 and 62: Assignment of Voltage Measuring Inp
Page 63 and 64: Figure 2-9 Power measurement at gen
Page 66 and 67: Functions 2.1 General 66 The mode o
Page 68 and 69: Functions 2.1 General Figure 2-12 R
Page 70 and 71: Functions 2.1 General Current Trans
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Functions 2.1 General 74 Hereinafte
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Functions 2.1 General 76 Figure 2-1
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Functions 2.1 General 80 As the abo
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Functions 2.1 General 2.1.4.4 Circu
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Functions 2.1 General 84 Addr. Para
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Functions 2.1 General 2.1.5 Setting
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SIPROTEC, 7UT6x, Manual C53000-G117
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Addr. Parameter C Setting Options D
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No. Information Type of Information
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2.2 Differential Protection SIPROTE
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Figure 2-25 Tripping logic of the d
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Earthed Starpoint SIPROTEC, 7UT6x,
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Use on Single-phase Auto-transforme
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2.2.3 Differential Protection for G
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2.2.5 Differential Protection for M
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2.2.6 Single-phase Differential Pro
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Functions 2.2 Differential Protecti
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Functions 2.3 Restricted Earth Faul
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2.4.1.2 Inverse Time Overcurrent Pr
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2.4.1.5 Inrush Restraint SIPROTEC,
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Figure 2-74 Fast busbar protection
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Functions 2.4 Time Overcurrent Prot
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2.4.2.3 Information List No. Inform
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Functions 2.6 Dynamic Cold Load Pic
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Functions 2.6 Dynamic Cold Load Pic
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Functions 2.7 Single-Phase Time Ove
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Functions 2.7 Single-Phase Time Ove
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2.8 Unbalanced Load Protection SIPR
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Pickup, Trip Dropout SIPROTEC, 7UT6
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Thermal Stage Pickup, Warning Therm
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Logic SIPROTEC, 7UT6x, Manual C5300
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Example: Machine I N = 483 A SIPROT
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Functions 2.9 Thermal Overload Prot
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Functions 2.9 Thermal Overload Prot
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Functions 2.11 Overexcitation Prote
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Delay and Logic Two delay times are
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Functions 2.13 Forward Power Superv
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Functions 2.14 Undervoltage Protect
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2.15.1 Function Description SIPROTE
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Figure 2-106 Logic diagram of frequ
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2.16.4 Information List No. Informa
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Delay Time and Breaker Failure Trip
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Initiation SIPROTEC, 7UT6x, Manual
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2.18 External Trip Commands 2.18.1
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Functions 2.19 Monitoring Functions
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The following figure shows the logi
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No. Information Type of Information
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Functions 2.20 Protection Function
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Functions 2.20 Protection Function
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Functions 2.21 Disconnection of Mea
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Functions 2.22 Additional Functions
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2.22.4 Differential and Restraining
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2.22.10 Commissioning Aids SIPROTEC
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2.23 Average Values, Minimum and Ma
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2.23.2 Min/Max Measurement Setup 2.
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Functions 2.24 Command Processing C
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Functions 2.24 Command Processing 3
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Mounting and Commissioning 3.1 Moun
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Mounting and Commissioning 3.1 Moun
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RTD-Box SIPROTEC, 7UT6x, Manual C53
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The ratings of the fuse are printed
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Board Arrangement 7UT613/63x SIPROT
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3.1.2.3 Switching Elements on Print
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Processor Module C-CPU-2 SIPROTEC,
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Input/Output Board C-I/O-2 (only 7U
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The input/output board C-I/O-2 carr
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Input/Output Board C-I/O-9 (only 7U
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Table 3-22 Assignment of jumpers fo
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Note SIPROTEC, 7UT6x, Manual C53000
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Table 3-24 Exchange Interface Modul
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RS485 Interface SIPROTEC, 7UT6x, Ma
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3.1.3 Mounting 3.1.3.1 Panel Flush
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3.1.3.2 Rack and Cubicle Mounting S
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Figure 3-25 Installation of a 7UT63
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System interface SIPROTEC, 7UT6x, M
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RTD box SIPROTEC, 7UT6x, Manual C53
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3.3.1 Test Mode / Transmission Bloc
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Structure of the Dialog Box SIPROTE
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Structure of the Dialog Box SIPROTE
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An update is made: Exiting the Proc
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Table 3-30 Indications on matching
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Flexible Functions Current Function
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Mounting and Commissioning 3.3 Comm
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Figure 3-46 Phasor Diagram of the P
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Mounting and Commissioning 3.4 Fina
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Technical Data 4.1 General 4.1 Gene
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Technical Data 4.1 General 4.1.5 Co
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Operating Range Frequency (Transfor
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Operating Times (Generators, Motors
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Operating Time (Busbars, Short Line
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Technical Data 4.4 Time Overcurrent
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Technical Data 4.8 Unbalanced Load
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Technical Data 4.8 Unbalanced Load
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Technical Data 4.11 Overexcitation
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Technical Data 4.20 User-defined Fu
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Technical Data 4.20 User-defined Fu
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Time Synchronisation Commissioning
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4.23.3 Panel Surface Mounting (Encl
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4.23.5 Panel Surface and Cabinet Mo
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4.23.7 RTD box Figure 4-26 Dimensio
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Appendix A This appendix is primari
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Additional Specification L for Furt
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Additional Specification L for Furt
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1) Only in connection with position
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Exchangeable Interface Modules SIPR
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SIMATIC CFC 4 Varistor SIPROTEC, 7U
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7UT613*-*D/E Figure A-2 Overview di
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7UT633*-* D/E Figure A-3 General di
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7UT633*-* P/Q Figure A-4 General di
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7UT635*-* D/E Figure A-5 General di
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7UT635*-* P/Q Figure A-6 General di
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7UT613*-* B Figure A-8 General diag
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7UT633*-* B Figure A-9 General diag
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7UT633*-* N Figure A-10 General dia
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7UT635*-* B Figure A-11 General dia
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7UT635*-* N Figure A-12 General dia
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Figure A-22 Connection example 7UT6
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A.3.2 Voltage Transformer Connectio
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A.3.3 Assignment of Protection Func
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Appendix A.5 Default Settings A.5 D
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Appendix A.5 Default Settings A.5.5
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Appendix A.5 Default Settings A.5.6
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Addr. Parameter Setting Options Def
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A.8 Settings Addresses which have a
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Addr. Parameter Function C Setting
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A.9 Information List SIPROTEC, 7UT6
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No. Description Function Type of In
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Appendix A.9 Information List 640 N
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Literature /1/ SIPROTEC 4 System Ma
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LVU Master Metered value MLFB Modem
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Index A Acknowledgement of commands
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Fault Value Storage Storage Criteri
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P Parameter Group Changeover 36, 97
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Z Zero Current 124 Zero Sequence Cu
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