Siemens SIPROTEC 7VU681 User manual

SIPROTEC
Multifunction Automatic
Transfer System
7VU681
V4.60
User Manual
C53000-G1176-C368-1
Preface
Content
Introduction 1
Functions 2
Mounting And Commissioning 3
Technical Data 4
Appendix A
Literature

Siemens Power Automation Ltd. Order No.: C53000-G1176-C368-1
Note
For safety purposes, please note instructions and warnings in the Preface.
Disclaimer of Liability
We have checked the contents of this manual against the hardware
and software described. However, deviations from the description
cannot be completely ruled out, so that no liability can be accepted
for any errors or omissions contained in the information given.
The information given in this document is reviewed regularly and
any necessary corrections will be included in subsequent editions.
We appreciate any suggested improvements.
We reserve the right to make technical improvements without
notice.
Document Version: V04.00.00
Release date: 2012.07
Copyright
Copyright © Siemens AG 2012. Allrights reserved.
Dissemination or reproduction of this document, or evaluation and
communication of its contents, is not authorized except where
expressly permitted. Violations are liable for damages. All rights
reserved, particularly for the purposes of patent application or
trademark registration.
Registered Trademarks
SIPROTEC, SINAUT, SICAM and DIGSI are registered trademarks
of Siemens AG. Other designations in this manual might be
trademarkswhoseuseby thirdpartiesfortheir ownpurposeswould
infringe the rights of the owner.

SIPROTEC, 7VU681, User Manual
C53000-G1176-C368-1, Release Date 07.2012 3
Preface
Purpose of this manual
This manual describes the functions, operation, installation, and commissioning of devices 7VU681-> In par-
ticular, one will find:
• Information regarding the configuration of the scope of the device and a description of the device functions
and settings > Chapter 2;
• Instructions for Installation and Commissioning > Chapter 3;
• Technical Data > Chapter 4;
• As well as a compilation of the most significant data for advanced users > Appendix A.
General information with regard to design, configuration, and operation of SIPROTEC 4 devices are set out in
the SIPROTEC 4 System Description /1/.
Target Audience
Protection engineers, commissioning engineers, personnel concerned with adjustment, checking, and service
of selective protective equipment, automatic and control facilities, and personnel of electrical facilities and
power plants.
Applicability of this Manual
This manual applies to: SIPROTEC 4 Power Supply Transfer Device 7VU681; firmware version V4.6..
Indication of Conformity
Additional Support
Should further information on the System SIPROTEC 4 be desired or should particular problems arise which
are not covered sufficiently for the purchaser's purpose, the matter should be referred to the local Siemens rep-
resentative.
Our Customer Support Center provides a 24-hour service.
Phone: [phone]
Fax: [phone]
e-mail: [email protected]
This conformity has been established by means of tests conducted by Siemens AG in accordance with Article
10 of the Council Directive in agreement with the generic standards EN 61000-6-2 and EN 61000-6-4 for the
EMC directive, and with the standard EN 60255-6 for the low-voltage directive.
The device has been designed and produced for industrial use.
The product conforms with the international standards of the series IEC 60255 and the German standard VDE
0435.
Additional Standards IEEE 37.90

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C53000-G1176-C368-1, Release Date 07.2012
4
Training Courses
Enquiries regarding individual training courses should be addressed to our Training Center:
Energy Sector
Power Distribution Division
Energy Automation
Siemens Power Automation Ltd
Building 4, Hua Rui Industry Park,
88 Cheng Xin Avenue,
Jiangning Economic & Technological
Development Zone
Nanjing 211100, P.R.China
Phone:[phone]
Fax:[phone]
Internet: http://www.siemens.com.cn/ea
Safety Information
This manual does not constitute a complete index of all required safety measures for operation of the equip-
ment (module, device), as special operational conditions may require additional measures. However, it com-
prises important information that should be noted for purposes of personal safety as well as avoiding material
damage. Information that is highlighted by means of a warning triangle and according to the degree of danger,
is illustrated as follows.
DANGER!
Danger indicates that death, severe personal injury or substantial material damage will result if proper precau-
tions are not taken.
WARNING!
indicates that death, severe personal injury or substantial property damage may result if proper precautions are
not taken.
Caution!
indicates that minor personal injury or property damage may result if proper precautions are not taken. This
particularly applies to damage to or within the device itself and consequential damage thereof.
Note
indicates information on the device, handling of the device, or the respective part of the instruction manual
which is important to be noted.

Preface
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WARNING!
Qualified Personnel
Commissioning and operation of the equipment (module, device) as set out in this manual may only be carried
out by qualified personnel. Qualified personnel in terms of the technical safety information as set out in this
manual are persons who are authorized to commission, activate, to ground and to designate devices, systems
and electrical circuits in accordance with the safety standards.
Use as prescribed
The operational equipment (device, module) may only be used for such applications as set out in the catalogue
and the technical description, and only in combination with third-party equipment recommended or approved
by Siemens.
The successful and safe operation of the device is dependent on proper handling, storage, installation, opera-
tion, and maintenance.
When operating an electrical equipment, certain parts ofthe device are inevitably subject to dangerous voltage.
Severe personal injury or property damage may result if the device is not handled properly.
Before any connections are made, the device must be grounded to the ground terminal.
All circuit components connected to the voltage supply may be subject to dangerous voltage.
Dangerous voltage may be present in the device even after the power supply voltage has been removed (ca-
pacitors can still be charged).
Operational equipment with exposed current transformer circuits may not be operated.
The limit values as specified in this manual or in the operating instructions may not be exceeded. This aspect
must also be observed during testing and commissioning.

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6
Typographic and Symbol Conventions
The following text formats are used when literal information from the device or to the device appear in the text
flow:
Parameter Names
Designators of configuration or function parameters which may appear word-for-word in the display of the
device or on the screen of a personal computer (with operation software DIGSI), are marked in bold letters in
monospace type style. The same applies to the titles of menus.
1234A
Parameter addresses have the same character style as parameter names. Parameter addresses contain the
suffix Ain the overview tables if the parameter can only be set in DIGSI via the option Display additional set-
tings
Parameter Options
Possible settings of text parameters, which may appear word-for-word in the display of the device or on the
screen of a personal computer (with operation software DIGSI), are additionally written in italics. The same
applies to the options of the menus.
"Message“
Designators for information, which may be output by the relay or required from other devices or from the switch
gear, are marked in a monospace type style in quotation marks.
Deviations may be permitted in drawings and tables when the type of designator can be obviously derived from
the illustration.
The following symbols are used in drawings:
Besides these, graphical symbols are used in accordance with IEC 60617-12 and IEC 60617-13 or similar.
Some of the most frequently used are listed below:
Device-internal logical input signal
Device-internal logical output signal
Internal input signal of an analog quantity
External binary input signal with number (Binary input, input indication)
External binary output signal with number (device indication)
External binary output signal with number (device indication) used as
input signal
Example of a parameter switch designated FUNCTION with address
1234 and the possible settings ON and OFF

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■
Input signal of analog quantity
AND-gate operation of input values
OR-gate operation of input values
Exclusive OR-gate (antivalence): output is active, if only one of the
inputs is active
Coincidence gate (equivalence): output is active, if both inputs are
active or inactive at the same time
Dynamic inputs (edge-triggered) above with positive, below with nega-
tive edge
Formation of one analog output signal from a number of analog input
signals
Limit stage with setting address and parameter designator (name)
Timer (pickup delay T, example adjustable) with setting address and
parameter designator (name)
Timer (dropout delay T, example non-adjustable)
Dynamic triggered pulse timer T (monoflop)
Static memory (RS-flipflop) with setting input (S), resetting input (R),
output (Q) and inverted output (Q)

Preface
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Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.1 Application Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
1.2 Function Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.3 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.1 ATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
2.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
2.1.1.1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
2.1.1.2 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
2.1.2 Power Supply Transfer between Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.1.2.1 Primary Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.1.2.2 Transfer Mode Line1->Line2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
2.1.2.3 Transfer Mode Line2->Line1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
2.1.3 Power Supply Transfer between Busbars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
2.1.3.1 Primary Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
2.1.3.2 Transfer Mode Busbar1->Busbar2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
2.1.3.3 Transfer Mode Busbar2->Busbar1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
2.1.4 Power Supply Transfer between Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
2.1.4.1 Primary Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
2.1.4.2 Transfer Mode Transformer1->Transformer2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
2.1.4.3 Transfer Mode Transformer2->Transformer1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
2.1.5 User-specified ATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
2.1.6 Load Shedding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
2.1.7 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
2.1.8 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
2.2 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
2.2.1 Phase Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
2.2.1.1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
2.2.1.2 Information List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
2.2.2 Zero Sequence Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
2.2.2.1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
2.2.2.2 Information List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
2.2.3 Phase O/C for Busbar Energization Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
2.2.3.1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
2.2.3.2 Information List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
2.2.4 Earth O/C for Busbar Energization Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
2.2.4.1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
2.2.4.2 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Contents
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2.3 Monitor Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
2.3.1 PT Broken Wire Supervision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
2.3.1.1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
2.3.1.2 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
2.3.2 Busbar Voltage Sequence Supervision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
2.3.2.1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
2.3.2.2 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
3 Mounting And Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
3.1 Mounting And Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
3.1.1 Configuration Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
3.1.2 Hardware Modification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
3.1.2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
3.1.2.2 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
3.1.2.3 Switching Elements on the Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3.1.2.4 Interface Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
3.1.2.5 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
3.1.3 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
3.1.3.1 Panel Flush Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
3.1.3.2 Rack and Cubical Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
3.2 Checking Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
3.2.1 Checking Data Connections of Serial Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
3.2.2 System Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
3.2.3 Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
3.2.4 Time Synchronization Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
3.2.5 Optical Fibres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
3.2.6 Checking Device Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
3.2.7 Checking System Incorporation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
3.3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
3.3.1 Test Mode/Transmission Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
3.3.2 Test System Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
3.3.3 Checking the Binary Inputs and Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
3.3.4 Test User-defined Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
3.3.5 Commissioning Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
3.3.6 Checking the Voltage Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
3.3.7 Checking the Current Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
3.3.8 Creating A Test Fault Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
3.4 Final Preparation of the Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
4 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
4.2 Rated Electrical Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
4.3 Functional Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
4.3.1 ATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
4.3.2 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
4.3.3 Electrical Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Contents
SIPROTEC, 7VU681, User Manual
C53000-G1176-C368-1, Release Date 07.2012 11
A Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
A.1 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
A.2 Terminal Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
A.2.1 7VU681 Terminal Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
A.3 Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
A.3.1 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
A.3.1.1 7VU681 LED default configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
A.3.2 Binary Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
A.3.2.1 7VU681BI default configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
A.3.3 Binary Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
A.3.3.1 7VU681 BO default configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
A.3.4 Default Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
A.4 Dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Contents
SIPROTEC, 7VU681, User Manual
C53000-G1176-C368-1, Release Date 07.2012
12

SIPROTEC, 7VU681, User Manual
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Introduction 1
This chapter indroduces the power supply transfer devices 7VU681. It presents an overview of the scope of
application, the properties ,and functional scope of the 7VU681.
1.1 Application Scope 14
1.2 Function Configuration 14
1.3 Characteristics 14

Introduction
1.1 Application Scope
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1.1 Application Scope
In power plant, industrial plant and network substation, in order to ensure the continuity of load operation, two
power supplies are provided for important loads . One power supply is working as the operating power supply,
another is the backup.
When the operating power supply is shut down because of system fault or equipment maintenance or
deliberate operation, the load busbar will be transferred to the standby power supply immediately by the power
supply transfer devices.
1.2 Function Configuration
7VU681 supports the power supply transfer between transformers, lines and busbars. You can also define own
ATS logic through CFC.
Besides power supply transfer functions, 7VU681 have the protection functions, the protected object is the tie-
CB of the busbar. When the standby power supply is connected to a fault source by a power supply transfer
operation, the standby power supply can be disconnected immediately. When the tie-CB is closing, if a busbar
is fault, the tie-CB will be opened immediately and the power supply transfer operation will be blocked.
7VU681 have the load-shedding function to maintain the system stability after busbar transfer.
1.3 Characteristics
General
• Low power consumption, good for device long-term running.
• Powerful information recording with fault record, event log , trip log etc.
• Powerful analysis and configuration tool - DIGSI.
• Flexible to define own logic by CFC.
• Support protocols: IEC61850, Redundant T103, T103, ModBus and ProfiBus - DP.
• High qualified Hardware, good performance of EMC.
ATS
• Support typical transfer modes.
• Support user defined logic.
• Protection functions for tie-CB integrated.
■

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Function 2
This chapter describes the individual functions available on the SIPROTEC 4 device 7VU681. It show the
setting possibilities for each function in maximum configuration.
2.1 ATS 16
2.2 Protection Function 47
2.3 Monitor Function 56

Function
2.1 ATS
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2.1 ATS
2.1.1 General
Here are the basic requirements of ATS function:
1. When the busbar voltage is dead, the standby voltage is normal and there is no blocking condition, ATS start.
2. ATS cannot start when the CB of the operating power supply is opened manually.
3. Before ATS releases the close command to the CB of the standby power supply, it must confirm that the CB
of operating power supply is opened.
4. Transfer operation can be started only after ATS is Ready.
The control conditions of the ATS can be divided to 3 categories: Ready condition, blocking condition and
pickup condition.
When all Ready conditions are fulfilled without any blocking condition, ATS becomes Ready after a time delay
(8938 Time Delay to Ready Status). When all pickup conditions are fulfilled, ATS starts after a time delay and
transfers the power supply.
The following diagram shows the general logic of Ready conditions, blocking conditions and pickup conditions.

Function
2.1 ATS
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Figure 2-1 The General Logic Diagram of ATS
7VU681 supports some typical power supply transfer logics for different primary diagrams. Transfer mode
defines each power transfer logic. The transfer modes can be switched ON or OFF separately with settings. In
the next chapter, it describes the details of the Ready conditions, Unready conditions, pickup conditions , and
CB operation logics for each mode of ATS.

Function
2.1 ATS
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If the default transfer modes cannot fulfill requirements, you can define a new ATS logic via CFC function to
meet the particular conditions and logics. Through CFC, you can do small logic changes of the existing transfer
modes.
When ATS is Ready, it becomes Unready with any blocking condition immediately; it will become Unready after
a delay (8939 Time Dealy to Un-Ready Status) with any Unready condition. When ATS is Unready, the signal
Ready is gone.
When one transfer mode starts, other transfer modes will be blocked. This action is to make sure that only one
mode of ATS can transfer the power supply during the same time.
After the transfer operation is finished, you can reset the ATS by manual reset and automatic reset. The reset
mode can be set via the parameter 0231 Manual Reset ATS. When it is set Yes, ATS will wait for the external
reset signal 17759 >Manual to restart or press the reset button (LED button) on the front panel after a transfer
operation. When it is set No, the ATS will automatically reset after a successful transfer operation. No matter
what the setting of 0231 Manual Reset ATS is, if the transfer operation fails, the ATS can only be reset by
manual.
When ATS is reset, the ATS will try to get Ready again.

Function
2.1 ATS
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The logic diagram of Voltage components and current components used in ATS logic is shown as followed.
Figure 2-2 Logic Diagram of Voltage Components and Current Components

Function
2.1 ATS
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The logics of Circuit breaker operation and supervision are shown as followed
Figure 2-3 Logic Diagram of CB operation
Note
1. The device does not support separate control function, it is not possible to operate the CB via front panel.
2. CB positions (52a and 52b) can be routed with 2 BIs as a double point signal. It also can be routed 1BI (H-
52a L-52b) as a normal open/close single point signal. If the default routing of CB is changed to single point
signal, the default display can be pdated with the single point signal. Otherwise the display of CB positions
on the display panel is incorrect. For example, CB1 position is changed to a single point signal, 17621 >CB1
52a routed with BI1"H" and 17622 >CB1 52b routed with BI1"L", or 17621 >CB1 52a routed with BI1"L"and
17622 >CB1 52b routed with BI1"H". 17621 >CB1 52a should be linked to the CB1 on the default display.
3. When testing ATS function is offline, simulation of CB closing/opening operation needs to be finished in 1s.
Otherwise the device releases warning messages of operation failure.