Siemens 242 - User Manual - manualsarea.com

Page 3 - Contents; Technical Manual Chapters

7SR242 Duobias Contents The copyright and other intellectual property rights in this document, and in any model or article produced from it (and including any registered or unregistered design rights) are the property of Siemens Protection Devices Limited. No part of this document shall be reproduce...

Page 7 - List of Figures

7SR242 Duobias Description Of Operation List of Figures Figure 1-1 Functional Diagram: 7SR242_-2_A_1-0AA0 Relay............................................................9Figure 1-2 Functional Diagram: 7SR242_-2_A_1-0BA0 Relay..............................................................10Figure 1-...

Page 8 - List of Tables; Symbols and Nomenclature; value

7SR242 Duobias Description Of Operation List of Tables Table 1-1: 7SR242 Ordering Options ....................................................................................................7 Table 2-1 Summary of 7SR24 Relay Configurations ...............................................................

Page 9 - Section 1: Introduction; SR242 Multi-Function 2-Winding Transformer Protection Relay; Current Transformer Circuits

7SR242 Duobias Description Of Operation Section 1: Introduction This manual is applicable to the following relays: x 7SR242 Multi-Function 2-Winding Transformer Protection Relay The 7SR242 relay integrates the protection and control elements required to provide a complete transformer protection. The...

Page 17 - Operator Interface/ Fascia; Relay Information

7SR242 Duobias Description Of Operation 2.4 Power Supply Unit (PSU) The relay PSU can be directly connected to any substation dc system rated from 30V dc to 220V dc. In the event of the station battery voltage level falling below the relay minimum operate level the PSU will automatically switch itse...

Page 18 - ‘PROTECTION HEALTHY’ LED

7SR242 Duobias Description Of Operation Liquid Crystal Display (LCD) A 4 line by 20-character liquid crystal display indicates settings, instrumentation, fault data and control commands. To conserve power the display backlighting is extinguished when no buttons are pressed for a user defined period....

Page 19 - Current Inputs

7SR242 Duobias Description Of Operation initiates operation. The LED illumination colour is assigned in the OUTPUT CONFIG>LED CONFIG menu for both Pickup and Operate initiation. Functions are assigned to the LEDs in the OUTPUT CONFIG>OUTPUT MATRIX menu. Each LED can be labelled by withdrawing ...

Page 20 - Binary inputs

7SR242 Duobias Description Of Operation 2.8 Binary inputs The binary inputs are opto-couplers operated from a suitably rated dc supply. Relays are fitted with 9 or 19 binary inputs (BI). The user can assign any binary input to any of the available functions (INPUT CONFIG > INPUT MATRIX). The Powe...

Page 21 - Notes on Self Reset Outputs; Binary Output Test

7SR242 Duobias Description Of Operation 2.9 Binary outputs (Output Relays) Relays are fitted with 6 or 14 binary outputs. All outputs are fully user configurable and can be programmed to operate from any or all of the available functions. The Power Supply module includes the relay basic I/O. The mod...

Page 22 - Self Monitoring

7SR242 Duobias Description Of Operation Event Output 1 Min Operate Time Hand Reset BO 1 hand reset S R Q OUTPUT CONFIG> OUTPUT MATRIX (Or gates) Logic signals, e.g. '51-1' Reset LEDs & Outputs (TEST/RESET key, Binary Input, Data Comms) & & & 1 1 Event Output n BO n hand reset S R ...

Page 23 - Section 3: Protection Functions

7SR242 Duobias Description Of Operation Section 3: Protection Functions 3.1 Current Protection: Differential Protection Comprises both biased differential and high-set differential elements. The fundamental frequency current is measured with the line CT inputs. These line currents are both multiplie...

Page 24 - Line; Inhibit

7SR242 Duobias Description Of Operation ©2010 Siemens Protection Devices Limited Chapter 1 Page 21 of 52 3.1.2 Overall Biased Differential (87BD) 87BD Initial Setting 1 st Bias Slope Limit Bias (Restraint) Current 2 I I W2 W1 87B D 1 st Bias Slop e 2nd Bias Slope Type W2 W1 I I I W1 I W2 Figure 3-1 ...

Page 29 - definite time delayed

7SR242 Duobias Description Of Operation 3.2.2 Time Delayed Overcurrent Protection (51) Optionally two time delayed overcurrent elements are provided, each can be selected to either winding 1 or winding 2. 51-n Setting sets the pick-up current level. A number of shaped characteristics are provided. A...

Page 34 - Current Protection: High Impedance Restricted Earth

7SR242 Duobias Description Of Operation 3.5 Current Protection: High Impedance Restricted Earth Fault (64H) Two high impedance restricted earth fault elements are provided, one for each transformer winding The relay utilises fundamental current measurement values for this function. The single phase ...

Page 36 - Current Protection: Negative Phase Sequence

7SR242 Duobias Description Of Operation 3.7 Current Protection: Negative Phase Sequence Overcurrent (46NPS) Optionally four NPS current elements are provided – 2 x 46IT and 2 x 46DT. Each element can be selected to either winding 1 or winding 2. The 46IT elements can be configured to be either defin...

Page 38 - ln

7SR242 Duobias Description Of Operation 3.9 Current Protection: Thermal Overload (49) Optionally a phase segregated thermal overload element is provided, this can be selected to either winding 1 or winding 2. The thermal state is calculated using the measured True RMS current. Should the current ris...

Page 42 - or

7SR242 Duobias Description Of Operation 3.11 Voltage Protection: Under/Over Voltage (27/59) Optionally four under/over voltage elements are provided. The relay utilises fundamental voltage measurement values for this function. 27/59-n Setting sets the pick-up voltage level for the element. The sense...

Page 45 - Quick Logic; OFF

7SR242 Duobias Description Of Operation Section 4: Control & Logic Functions 4.1 Quick Logic The ‘Quick Logic’ feature allows the user to input up to 16 logic equations (E1 to E16) in text format. Equations can be entered using Reydisp or at the relay fascia. Each logic equation is built up from...

Page 47 - Section 5: Supervision Functions; Trip Contact

7SR242 Duobias Description Of Operation Section 5: Supervision Functions 5.1 Circuit Breaker Failure (50BF) Two CB Fail elements are provided – one element per winding. Each circuit breaker fail function has two time delayed outputs that can be used for combinations of re-tripping or back-tripping. ...

Page 50 - Demand; FIXED, PEAK or ROLLING; ROLLING

7SR242 Duobias Description Of Operation 5.5 Demand Maximum, minimum and mean values of line currents and voltage (where applicable) are available as instruments which can be read in the relay INSTRUMENTS MENU or via Reydisp. The DATA STORAGE > DEMAND DATA LOG > Data Log Period setting is used ...

Page 51 - t CB Wear

7SR242 Duobias Description Of Operation Section 6: Other Features 6.1 Data Communications Two communication ports, COM1 and COM2 are provided. RS485 connections are available on the terminal blocks at the rear of the relay (COM1). A USB port, COM 2, is provided at the front of the relay for local ac...

Page 52 - Data Storage

7SR242 Duobias Description Of Operation I 2 t CB2 Wear: As CB1 The status of each counter can be viewed in the INSTRUMENTS mode. Binary outputs can be mapped to each of the above counters, these outputs are energised when the user defined Alarm Limit is reached. 6.3 Data Storage 6.3.1 General The re...

Page 53 - Disabled; Metering

7SR242 Duobias Description Of Operation Waveforms are sampled at a rate of 1600Hz. Stored waveforms can be erased using the DATA STORAGE> Clear Waveforms setting. 6.3.4 Fault Records Up to ten fault records can be stored and displayed on the Fascia LCD. Fault records provide a summary of the rela...

Page 54 - Operating Mode; Control Mode

7SR242 Duobias Description Of Operation 6.5 Operating Mode The relay has three operating modes, Local, Remote and Out of Service. The following table identifies the functions operation in each mode. The modes can be selected by the following methods: SYSTEM CONFIG> RELAY MODE setting, a Binary In...

Page 55 - Time Synchronisation – Binary Input; Settings Groups; Active Group No; Password Feature; NONE

7SR242 Duobias Description Of Operation ©2010 Siemens Protection Devices Limited Chapter 1 Page 52 of 52 6.7.1 Time Synchronisation – Data Comms Where the data comms channel(s) is connected to a dedicated substation automation system the relay can be time synchronised using the relevant command with...

Page 59 - LCD Contrast

7SR242 Duobias Settings, Configuration & Instruments Guide Section 1: Introduction 1.1 Relay Menus And Display All relay fascias contain the same access keys although the fascias may differ in appearance from model to model. The basic menu structure is also the same in all products and consists ...

Page 61 - Guide; User Interface Operation; ENTER to CONTROL; READ DOWN; ENTER; CANCEL

7SR242 Duobias Settings, Configuration & Instruments Guide 1.2 Operation Guide 1.2.1 User Interface Operation The basic menu structure flow diagram is shown in Figure 1.2-2. This diagram shows the main modes of display: Settings Mode, Instrument Mode, Fault Data Mode and Control Mode. When the r...

Page 63 - Display; Mode; Instrument Description

7SR242 Duobias Settings, Configuration & Instruments Guide 1.3 Settings Display The Settings Mode is reached by pressing the READ DOWN button from the relay identifier screen. Once the Settings Mode title screen has been located pressing the READ DOWN button takes the user into the Settings mode...

Page 64 - DIFFERENTIAL METERS

7SR242 Duobias Settings, Configuration & Instruments Guide DIFFERENTIAL METERS to view This is the sub-group that includes all the meters that are associated with Current TEST/RESET allows access to this sub-group W1 Line Ia 0.00xIn ---- o Ib 0.00xIn ---- o Ic 0.00xIn ---- o Displays Winding 1 I...

Page 65 - CURRENT METERS

7SR242 Duobias Settings, Configuration & Instruments Guide CURRENT METERS to view This is the sub-group that includes all the meters that are associated with Current TEST/RESET allows access to this sub-group W1 Primary Ia 0.00kA Ib 0.00kA Ic 0.00kA Displays the 3 phase currents Primary RMS valu...

Page 68 - MAINTENANCE METERS

7SR242 Duobias Settings, Configuration & Instruments Guide MAINTENANCE METERS to view This is the sub-group that includes all the meters that are associated with Maintenance TEST/RESET allows access to this sub-group CB1 Manual Close Last Close ms CB1 Manual Open Last Open ms Displays the CB man...

Page 71 - QUICK LOGIC METERS; Fault Data Mode

7SR242 Duobias Settings, Configuration & Instruments Guide QUICK LOGIC METERS to view E 1-8 E 9-16 E1 Equation 0 EQN = 0 TMR 0-0 = 0 CNT 0-1 = 0 En Equation 1.5 Fault Data Mode The Fault Data Mode sub menu lists the time and date of the previous ten protection operations. The stored data about e...

Page 72 - Section 2: Setting the Relay Using Reydisp Evolution; Connection; Front USB connection

7SR242 Duobias Settings, Configuration & Instruments Guide Section 2: Setting the Relay Using Reydisp Evolution To set the relay using the communication port the user will need the following:- PC with REYDISP Evolution Installed. (REYDISP can be downloaded from our website www.siemens.com/energy...

Page 73 - Pin

7SR242 Duobias Settings, Configuration & Instruments Guide 2.1.2 Rear RS485 connection Figure 2-2 RS485 connection to PC 2.1.3 Optional rear fibre optic connection Figure 2-3 Fibre Optic Connection to PC Sigma devices have a 25 pin female D connector with the following pin out. Pin Function 2 Tr...

Page 74 - Configuring Relay Data Communication

7SR242 Duobias Settings, Configuration & Instruments Guide ©2010 Siemens Protection Devices Limited Chapter 2 Page 19 of 20 2.1.4 Configuring Relay Data Communication Using the keys on the relay fascia scroll down the settings menu’s into the ‘communications’ menu. All of the below settings may ...

Page 75 - Connecting to the Relay via Reydisp

7SR242 Duobias Settings, Configuration & Instruments Guide ©2010 Siemens Protection Devices Limited Chapter 2 Page 20 of 20 2.1.5 Connecting to the Relay via Reydisp When Reydisp software is running all available communication ports of the PC will automatically be detected. On the start page too...

Page 80 - Parameter Value

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 5 of 45 Section 1: Common Functions 1.1 General 1.1.1 CE Conformity This product is CE compliant to relevant EU directives. 1.1.2 Reference This product complies with IEC 60255-3, IEC 60255-6 and IEC 6...

Page 81 - Energising Quantities

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 6 of 45 1.2 Energising Quantities 1.2.1 Auxiliary Power Supply Nominal Operating Range V AUX 30, 48, 110, 220 VDC 24 to 290 VDC 1.2.1.1 Burden Attribute Value Quiescent (typical) 6.0 W 30V DC Quiescent...

Page 82 - Attribute Value

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 7 of 45 1.2.3 AC Voltage Nominal Operating Range Vn 40 to 160 V Up to 270 V fn 50, 60Hz 47 to 62Hz 1.2.3.1 Burden Attribute Value AC Burden 0.01 VA at 110 V 1.2.4 Binary (Digital) Outputs Contact ratin...

Page 83 - Nominal

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 8 of 45 1.2.5 Binary (Digital) Inputs Nominal Operating Range 19 VDC 17 to 290 VDC V BI 88 VDC 74 to 290 VDC 1.2.5.1 Performance Attribute Value V BI = 19 V 1.5mA Maximum DC current for operation V BI ...

Page 85 - Functional Performance; Fibre optic Data Communication Interface; RS485 Data Communication Interface

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 10 of 45 1.3 Functional Performance 1.3.1 Instrumentation Instrument Value Reference Typical accuracy I Current I t 0.1 x In r 1 % In V Voltage V t 0.8 x Vn r 1 % Vn 1.3.2 USB Data Communication Interf...

Page 86 - Environmental Performance

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 11 of 45 1.4 Environmental Performance 1.4.1 General 1.4.1.1 Temperature IEC 60068-2-1/2 Type Level Operating range -10 q C to +55 q C Storage range -25 q C to +70 q C 1.4.1.2 Humidity IEC 60068-2-3 Ty...

Page 93 - 6BC Open Circuit; Reference; Operate and Reset Level; Operate and Reset Time

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 18 of 45 2.3 46BC Open Circuit 2.3.1 Reference Parameter Value I set NPS to PPS ratio 20,21…100% t f Delay setting 0.03,04,20.0,20.1,100,101,1000,1010…..14400 s Is 46BC-n U/I Guard Setting 0.05, 0.10…5...

Page 94 - 6NPS Negative Phase Sequence Overcurrent

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 19 of 45 2.4 46NPS Negative Phase Sequence Overcurrent 2.4.1 Reference (46DT) Parameter Value I s Setting 0.05, 0.06... 4.0 xIn t d Delay setting 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… 10000, 1...

Page 95 - Tm; Tm

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 20 of 45 2.4.6 Operate and Reset Time (46IT) Attribute Value Starter operate time ( t 2 xIs ) 35 ms, r 10ms char = IEC-NI, IEC-VI, IEC-EI, IEC-LTI > @ Tm K t Is I op u 1 D , r 5 % absolute or r 50 m...

Page 96 - 9 Thermal Overload

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 21 of 45 2.5 49 Thermal Overload 2.5.1 Reference Parameter Value Is Overload setting 0.10, 0.11… 3 xIn W Time constant setting 1, 1.5… 1000 min 2.5.2 Operate and Reset Level Attribute Value I ol Overlo...

Page 97 - Tim e

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 22 of 45 0.1 1 10 100 1000 10000 100000 0 1 2 3 4 5 6 7 8 9 10 Curre nt (m ultiple of se tting) Tim e (se c) W = 1000 mins W = 100 mins W = 10 mins W = 1 min Figure 2-1 Thermal Overload Protection Curv...

Page 98 - 0 instantaneous overcurrent

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 23 of 45 2.6 50 instantaneous overcurrent 2.6.1 Reference Parameter Value Is Setting 0.05, 0.10… 25, 25.5… 50 x In t d Delay setting 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… 10000, 10100… 14400 s...

Page 99 - 0N instantaneous Derived Earth Fault

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 24 of 45 2.7 50N instantaneous Derived Earth Fault 2.7.1 Reference Parameter Value Is Setting 0.05, 0.10… 25, 25.5… 50 x In t d Delay setting 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… 10000, 10100...

Page 100 - 0G Instantaneous Measured Earth Fault

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 25 of 45 2.8 50G Instantaneous Measured Earth Fault 2.8.1 Reference Parameter Value Is Setting 0.005…25.0 x In t d Delay setting 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… 10000, 10100… 14400 s 2.8...

Page 101 - 1 Time Delayed Overcurrent; Parameter; Attribute

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 26 of 45 2.9 51 Time Delayed Overcurrent 2.9.1 Reference Parameter Value Is Setting 0.05, 0.1… 2.5 xIn char Characteristic setting IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL Tm Time Multiplier sett...

Page 103 - 1N Time Delayed Derived Earth Fault

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 28 of 45 2.10 51N Time Delayed Derived Earth Fault 2.10.1 Reference Parameter Value Is Setting 0.05, 0.1… 2.5 xIn char Characteristic setting IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL Tm Time Mult...

Page 105 - 1G Time Delayed Measured Earth Fault

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 30 of 45 2.11 51G Time Delayed Measured Earth Fault 2.11.1 Reference Parameter Value Is Setting 0.005, 0.10… 1.0 xIn Char Characteristic setting IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL Tm Time M...

Page 107 - T ime; Long Time Inverse

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 32 of 45 0.1 1 10 100 1000 1 10 100 Current (multiples of setting) T ime (sec) 2 3 4 5 6 8 20 30 40 50 60 80 Long Time Inverse Normal Inverse Very Inverse Extremely Inverse Figure 2-2 IEC IDMTL Curves ...

Page 108 - Moderately Inverse

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 33 of 45 0.1 1 10 100 1000 1 10 100 Current (multiples of setting) T ime (sec) 2 3 4 5 6 8 20 30 40 50 60 80 Moderately Inverse Extremely Inverse Very Inverse Figure 2-3 ANSI IDMTL Operate Curves (Time...

Page 110 - 9N Neutral Voltage Displacement

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 35 of 45 2.12 59N Neutral Voltage Displacement 2.12.1 Reference (59NDT) Parameter Value V s Setting 1, 1.5… 100V t d Delay setting 0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… 10000, 10100… 14400 s 2...

Page 112 - 4H Restricted Earth Fault Protection

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 37 of 45 2.13 64H Restricted Earth Fault Protection 2.13.1 Reference Parameter Value I s Setting 0.005, 0.010… 0.95 x In t d Delay setting 0.00, 0.01… 20.0, 20.1… 100.0, 101.…1000, 1010 … 10000 , 10100...

Page 115 - and

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 40 of 45 Operate and Reset Level Attribute Value Operate level 2 nd Bias Slope Type = Line B) I (for I M I and I M I and I I RESTRAIN RESTRAIN 2 OPERATE RESTRAIN 1 OPERATE SETTING INITIAL 87 OPERATE ! ...

Page 118 - 4TCS/CCS Trip/Close Circuit Supervision

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 43 of 45 3.2 74TCS/CCS Trip/Close Circuit Supervision 3.2.1 Reference Parameter Value t d Delay setting 0, 0.02…60 s 3.2.2 Operate and Reset Time Attribute Value t basic Element basic operate time 30ms...

Page 119 - 1HBL2 Inrush Detector

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 44 of 45 3.3 81HBL2 Inrush Detector 3.3.1 Reference Parameter Value I Setting (Ratio of 2nd Harmonic current to Fundamental component current) 0.10, 0.11... 0.5 3.3.2 Operate and Reset Level Attribute ...

Page 120 - 1HBL5 Overfluxing Detector

7SR242 Duobias Performance Specification ©2010 Siemens Protection Devices Limited Chapter 3 - Page 45 of 45 3.4 81HBL5 Overfluxing Detector 3.4.1 Reference Parameter Value I Setting (Ratio of 5th Harmonic current to Fundamental component current) 0.10, 0.11... 0.5 3.4.2 Operate and Reset Level Attri...

Page 124 - Section 2: Physical Connection; COMMUNICATIONS MENU

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 4 of 43 Section 2: Physical Connection The relay provides one ‘Front’ USB communication interface (Com2) located on the fascia and one RS485 (Com1) located on the ‘Rear’. Optional Fibre optic ports can also be...

Page 125 - Communication ports; USB Interface; Station Address

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 5 of 43 2.1 Communication ports 2.1.1 USB Interface The USB communication port is connected using a standard USB cable with a type B connection to the relay and type A to the PC. The PC will require a suitable...

Page 127 - Fibre Optic Interface

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 7 of 43 2.1.3 Fibre Optic Interface When connecting via the optional fibre optic interface the selection of fibre-optic cable is important. Fibres must be terminated with STTM (BFOC/2.5) connectors. The recomm...

Page 131 - Introduction; Cause of Transmission

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 11 of 43 Section 3: IEC 60870-5-103 Definitions 3.1 Introduction This section describes the IEC 60870-5-103 protocol implementation in the relays. This protocol is used for the communication with REYDISP softw...

Page 138 - Address Description

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 18 of 43 Section 4: Modbus Definitions 4.1 Introduction This section describes the MODBUS-RTU protocol implementation in the relays. This protocol is used for communication with a suitable control system. This...

Page 145 - Device Profile

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 25 of 43 Section 5: DNP3.0 Definitions 5.1 Device Profile The following table provides a “Device Profile Document” in the standard format defined in the DNP 3.0 Subset Definitions Document. While it is referre...

Page 147 - Yes

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 27 of 43 DNP V3.0DEVICE PROFILE DOCUMENT (Also see the DNP 3.0 Implementation Table in Section 5.2, beginning on page 28.)Sends Multi-Fragment Responses: 7 Yes No Configurable Sequential File Transfer Support:...

Page 148 - Implementation Table

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 28 of 43 5.2 Implementation Table The following table identifies which object variations, function codes, and qualifiers the Triangle MicroWorks, Inc. DNP 3.0 Slave Source Code Library supports in both request...

Page 153 - Point List; Binary Input Points

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 33 of 43 5.3 Point List The tables below identify all the default data points provided by the implementation of the Triangle MicroWorks, Inc. DNP 3.0 Slave Source Code Library. Binary Input Points The default ...

Page 161 - Setting the Remote Modem

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 41 of 43 Section 6: Modems The communications interface has been designed to allow data transfer via modems. However, IEC 60870-5-103 defines the data transfer protocol as an 11 bit format of 1 start, 1 stop, ...

Page 162 - Connecting to the Remote Modem

7SR242 Duobias Data Communications ©2010 Siemens Protection Devices Limited Chapter 4 Page 42 of 43 6.1.3 Connecting to the Remote Modem Once the remote modem has been configured correctly, it should be possible to dial up the modem and make connection to the relay. As the settings on the remote mod...

Page 168 - Section 2: Equipment Operating Conditions

7SR242 Duobias Installation Guide Section 2: Equipment Operating Conditions 2.1 Current Transformer Circuits The secondary circuit of a live CT must not be open circuited. Non-observance of this precaution can result in injury to personnel and/or damage to equipment. ! 2.2 External Resistors Where e...

Page 169 - Section 3: Dimensions and Panel Fixings

7SR242 Duobias Installation Guide ©2010 Siemens Protection Devices Limited Chapter 5 Page 6 of 13 Section 3: Dimensions and Panel Fixings 3.1 Relay Dimensions and Weight Relays are supplied in size E8 and E10 cases. The drawing below provide panel cut-out and mounting details. Overall Dimensions and...

Page 170 - Fixings

7SR242 Duobias Installation Guide 3.2 Fixings 3.2.1 Crimps Ring tongued crimps with 90˚ bend are recommended. 3.2.2 Panel Fixings Typical mounting screw kit per Relay) Consists of 4 off M4x10mm Screws 4 off M4 Nuts 4 off M4 Lock Washer Typical rear terminal block fixing kit (1kit per terminal block ...

Page 171 - Section 4: Rear Terminal Drawings; E8 STANDARD COMMS + ADDITIONAL PORTS

7SR242 Duobias Installation Guide ©2010 Siemens Protection Devices Limited Chapter 5 Page 8 of 13 Section 4: Rear Terminal Drawings 4.1 E8 CASE E8 STANDARD COMMS + ADDITIONAL PORTS i.e.:- USB FRONT PORT, RS485 (SEE NOTE 2) IRIG B, 2 X F.O. (S.T. CONNECTORS) Notes 1) RECOMMENDED TERMINATIONS ARE PRE-...

Page 172 - Notes

7SR242 Duobias Installation Guide ©2010 Siemens Protection Devices Limited Chapter 5 Page 9 of 13 4.2 E10 CASE Notes 1) RECOMMENDED TERMINATIONS ARE PRE-INSULATED & MUST BE CRIMPED USING APPROVED TOOLING. 2) RS485 (BLOCK”B”TERMS 14, 16, 18, 20) CONNECTION TO THIS COMMUNICATION FACILITY IS BY SCR...

Page 173 - Wiring Diagram: 7SR242 Relay

7SR242 Duobias Installation Guide Section 5: Connection/Wiring/Diagrams 5.1 Wiring Diagram: 7SR242 Relay Figure 5.1-1 7SR242 Wiring Diagram ©2010 Siemens Protection Devices Limited Chapter 5 Page 10 of 13

Page 174 - Section 6: Data Comms Connections

7SR242 Duobias Installation Guide ©2010 Siemens Protection Devices Limited Chapter 5 Page 11 of 13 Section 6: Data Comms Connections 6.1 RS485 Connection The RS485 communication port terminals are located on the rear of the relay and can be connected using a suitable RS485 120 screened twisted pair ...

Page 175 - Fibre Optic Connections

7SR242 Duobias Installation Guide 6.3 Fibre Optic Connections Where fitted rear Data Comms ports 3 and 4 comprise Fibre–Optic ST™ (BFOC/2.5) bayonet connectors-4 per product. 62.5 / 125m glass fibre is recommended for all lead lengths. When installing fibre, ensure that the fibres’ bend radii comply...

Page 176 - Section 7: Connection Diagrams

Page 181 - Safety

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 5 of 56 Section 1: Common Functions 1.1 Overview Commissioning tests are carried out to prove: a) Equipment has not been damaged in transit. b) Equipment has been correctly connected and inst...

Page 182 - Test Equipment; Use of PC to facilitate testing; Precautions

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 6 of 56 1.2.3 Test Equipment Required test equipment is: Secondary injection equipment with integral time interval meter Primary injection equipment A d.c. supply with nominal voltage within ...

Page 183 - Applying Settings

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 7 of 56 1.2.5 Applying Settings The relay settings for the particular application should be applied before any secondary testing occurs. If they are not available then the relay has default s...

Page 184 - Tests; Secondary Injection Tests; Putting into Service

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 8 of 56 1.3 Tests 1.3.1 Inspection Ensure that all connections are tight and correct to the relay wiring diagram and the scheme diagram. Record any deviations. Check that the relay is correct...

Page 185 - AC Energising Quantities

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 9 of 56 1.4 AC Energising Quantities Voltage and current measurement for each input channel is displayed in the Instrumentation Mode sub-menus, each input should be checked for correct connec...

Page 186 - Binary Inputs

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 10 of 56 1.5 Binary Inputs The operation of the binary input(s) can be monitored on the ‘Binary Input Meters’ display shown in ‘Instruments Mode’. Apply the required supply voltage onto each ...

Page 188 - Section 2: Protection Functions

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 12 of 56 Section 2: Protection Functions This section details the procedures for testing each protection function of the 7SR24 relay. These tests are carried out to verify the accuracy of the...

Page 190 - Secondary Injection Testing

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 14 of 56 2.1 Biased Differential (87BD, 87HS) Figure 2-1 Biased Differential Voltage Inputs: None Current Inputs: W1-I L1 (I A ),W1-I L2 (I B ),W1-I L3 (I C ), and W2-I L1 (I A ),W2-I L2 (I B...

Page 193 - Primary Injection Testing

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 17 of 56 2.1.2 Primary Injection Testing Primary injection is recommended to prove the relay connections, CT polarity and settings before putting the protection scheme into service. Primary i...

Page 199 - ANSI Reset

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 23 of 56 2.2.2.1 Element Blocking The Measured Earth Fault elements can be blocked by Binary Input Inhibit, VT Supervision and Inrush Detector operation. The Characteristic can be made non-di...

Page 203 - Element; Value; Measured

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 27 of 56 2.4 Restricted Earth fault (64H) Figure 2-6 Restricted Earth Fault Voltage Inputs: n/a Current Inputs: I G1 , I G2 Disable: 50G, 51G, 50BF Map Pickup LED: 64H-n - Self Reset The exte...

Page 207 - Negative Phase Sequence Overcurrent (46NPS)

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 31 of 56 2.6 Negative Phase Sequence Overcurrent (46NPS) Figure 2-8 Negative Phase Sequence Overcurrent Voltage Inputs: n/a Current Inputs: W1-I L1 (I A ), W1-I L2 (I B ), W1-I L3 (I C ), or ...

Page 218 - sec; onds

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 42 of 56 2.10.1 Definite Time (59NDT) If DTL setting is small, gradually increase single phase voltage until element operates. If DTL is large apply 0.9x setting, check for no operation, appl...

Page 223 - Section 3: Supervision Functions

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 47 of 56 Section 3: Supervision Functions 3.1 CB Fail (50BF) Figure 3-1 CB Fail Voltage Inputs: n/a Current Inputs: W1-I L1 (I A ), W1-I L2 (I B ), W1-I L3 (I C ), I G1 or W2-I L1 (I A ), W2-...

Page 230 - Troubleshooting Guide; Change password

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 54 of 56 Section 5: Testing and Maintenance 7SR24 relays are maintenance free, with no user serviceable parts. 5.1 Periodic Tests During the life of the relay, it should be checked for operat...

Page 231 - Observation Action

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 55 of 56 Observation Action Cannot communicate with the relay. Check that all of the communications settings match those used by ReyDisp Evolution. Check that the Tx and Rx fibre-optic cables...

Page 232 - Defect Report

7SR242 Duobias Commissioning & Maintenance Guide ©2010 Siemens Protection Devices Limited Chapter 6 Page 56 of 56 5.4 Defect Report Please copy this sheet and use it to report any defect that may occur. Contact Name: Telephone No: Customers Name & Address: Fax No: Supplied by: Date when inst...

Page 236 - Transformer – Non-standard Secondary

7SR242 Duobias Applications Guide ©2010 Siemens Protection Devices Limited Chapter 7 Page 4 of 56 List of Figures Figure 1-1 Example Use of Alternative Settings Groups ......................................................................5 Figure 1-2 Example of Transformer Alarm and Trip Wiring .......

Page 237 - Section 1: Common Functions

7SR242 Duobias Applications Guide Section 1: Common Functions 1.1 Multiple Settings Groups Alternate settings groups can be used to reconfigure the relay during significant changes to system conditions e.g. Primary plant switching in/out. Summer/winter or day/night settings. switchable earthing conn...

Page 238 - Alarm and Tripping Inputs

7SR242 Duobias Applications Guide 1.2 Binary Inputs Each Binary Input (BI) can be programmed to operate one or more of the relay functions, LEDs or output relays. These could be used to bring such digital signals as Inhibits for protection elements, the trip circuit supervision status, autoreclose c...

Page 239 - The Effects of Capacitance Current

7SR242 Duobias Applications Guide The Effects of Capacitance Current The binary inputs have a low minimum operate current and may be set for instantaneous operation. Consideration should be given to the likelihood of mal-operation due to capacitance current. Capacitance current can flow through the ...

Page 241 - Binary Outputs; LED

7SR242 Duobias Applications Guide 1.3 Binary Outputs Binary Outputs are mapped to output functions by means of settings. These could be used to bring out such digital signals as trips, a general pick-up, plant control signals etc. All Binary Outputs are trip rated Each can be defined as Self or Hand...

Page 244 - Interposing CT Selection Guide

7SR242 Duobias Applications Guide Interposing CT Selection Guide Power Transformer Vector Group HV Interposing CT Selection LV Interposing CT Selection Yy0, YNy0, Yyn0, YNyn0, Ydy0, Yndy0, Ydyn0, Yndyn0, Dz0 Ydy0,0 q Ydy0,0 q Yd1, YNd1 Yd1,-30 q Yy0,0 q Yd1, YNd1 + Earthing Transformer Yd1,-30 q Ydy...

Page 245 - Bias Slope Limit Setting (1 to 20 x In)

7SR242 Duobias Applications Guide ©2010 Siemens Protection Devices Limited Chapter 7 Page 13 of 56 2.1.3 Biased Differential (87BD) Settings The 87BD elements provide differential protection for phase and earth faults. The limiting factors for protection sensitivity are dictated by the need to ensur...

Page 246 - 7BD Inrush Action; ENABLED

7SR242 Duobias Applications Guide When a through fault occurs, saturation of one or more CTs may cause a transient differential current to be detected by the relay. The bias slope limit is chosen to ensure the biased differential function is stable for high through fault currents coincident with CT ...

Page 247 - 7HS Delay Setting

7SR242 Duobias Applications Guide 2.1.4 Differential Highset (87HS) Settings The element operates on the differential current measured by the relay. The 87HS element is generally applied as an unrestrained differential element to provide fast tripping for heavy internal faults. 87HS Delay 87HS I W1 ...

Page 251 - W1 Internal Earth Fault

7SR242 Duobias Applications Guide 2.1.5.1 Example 1 – Further Analysis Having established settings to ensure stability under load, transient and external fault conditions the following considers the operating levels for internal faults. The ‘fault setting’ for internal fault conditions is affected b...

Page 252 - W1 Internal Phase-Phase Fault

7SR242 Duobias Applications Guide W1 Internal Phase-Phase Fault Figure 2-8: Relay Currents - Star Winding Internal Phase Fault Notes B - C fault causes current to flow in the A, B and C elements The Yd ICT connection causes a 1:2:1 current distribution and introduces a 1/3 multiplying factor. Relay ...

Page 253 - W2 Internal Earth Fault; W2 Internal Phase-Phase Fault

7SR242 Duobias Applications Guide W2 Internal Earth Fault Figure 2-9: Relay Currents - Delta Winding Internal Earth Fault W2 Internal Phase-Phase Fault Figure 2-10: Relay Currents - Delta Winding Internal Phase Fault ©2010 Siemens Protection Devices Limited Chapter 7 Page 21 of 56

Page 255 - Example 2 – Relay Replacement Using Existing CTs

7SR242 Duobias Applications Guide 2.1.6 Example 2 – Relay Replacement Using Existing CTs Figure 2-11 Relay Replacement It is recommended to wire all line CTs in star when connecting to the 7SR24 relay. Where the 7SR24 is used to replace an older biased differential relay the existing CTs will often ...

Page 256 - Step 1 – Connection of CTs

7SR242 Duobias Applications Guide Step 1 – Connection of CTs Remove all interposing CTs from the secondary circuit. Connect all line CT secondary wiring in star. HV load current = A 132,000 3 10 45 6 8 . 196 u u Re-use 300/1A CTs. LV load current = A 33,000 3 10 45 6 9 . 747 95 . 0 u u u Re-use 560/...

Page 261 - High Impedance Restricted Earth Fault (64H)

7SR242 Duobias Applications Guide 2.4 High Impedance Restricted Earth Fault (64H) Restricted earth fault (REF) protection can be applied to either or both windings of the transformer. The 7SR24 provides a high impedance REF (64H) element for each transformer winding. Low leakage reactance CTs (Class...

Page 262 - Determination of Stability; Establishing the Primary Operating Current (Fault Setting); Establishing the Required Stabilising Resistor Value

7SR242 Duobias Applications Guide The relay current setting is calculated taking into account: the required operate level for in-zone earth faults (fault setting). Determination of Stability The stability of the high impedance REF scheme depends upon the operate voltage setting being greater than th...

Page 264 - 9 Time Constant Setting

7SR242 Duobias Applications Guide 2.8 Thermal Overload (49) Thermal protection is provided to supplement the Winding Temperature device. This function provides a general overload thermal protection i.e. not a winding hot spot protection. Outputs can be assigned to both alarm and trip levels. The def...

Page 267 - Earth

7SR242 Duobias Applications Guide 2.10 Neutral Overvoltage (59N) Neutral Overvoltage Displacement (Residual Overvoltage) protection is used to detect an earth fault where little or no earth current flows. This can occur where a transformer feeder has been tripped at its HV side for an earth fault, b...

Page 268 - Application with Capacitor Cone Units

7SR242 Duobias Applications Guide 2.10.1 Application with Capacitor Cone Units Capacitor cones provide a cost effective method of deriving residual voltage. The wide range of capacitor cone component values used by different manufacturers means that the relay cannot be connected directly to the cone...

Page 271 - Vk 4 x I; Advice on CT Selection.

7SR242 Duobias Applications Guide Section 3: CT Requirements The specification of CTs must meet the requirements of all protection functions utilised e.g. overall differential, REF and backup over current protections. The relay has 1A and 5A rated terminals for each CT input and any combination of t...

Page 272 - Worked Example

7SR242 Duobias Applications Guide Worked Example Figure 3-1 CT Requirements Suitability of HV Current Transformers: 126.5V 1 3.5 0.14 400 10 132 3 10 90 4 V 3 6 K u u u u u u u t i.e. less than 250V Suitability of LV Current Transformers: V 12 0.14 00 10 33 3 10 90 4 V 3 6 K 9 . 449 4 16 u u u u u u...

Page 274 - Cross

7SR242 Duobias Applications Guide Section 5: Supervision Functions 5.1 Inrush Detector (81HBL2) 87 Inrush Element (Enable, Disable) When a transformer is energized transient magnetizing inrush currents flow in each phase of the energised winding. Inrush currents only flow into one transformer windin...

Page 276 - OUTPUT CONFIG>BINARY OUTPUT

7SR242 Duobias Applications Guide 5.3 Circuit Breaker Fail (50BF) Where a circuit breaker fails to operate to clear fault current the power system will remain in a hazardous state until the fault is cleared by remote or back-up protections. To minimise any delay, CB Failure protection provides a sig...

Page 278 - Trip Circuit Supervision Connections

7SR242 Duobias Applications Guide 5.4 Trip Circuit Supervision (74TCS) Binary Inputs may be used to monitor the integrity of the CB trip circuit wiring. Current flows through the B.I. confirming the integrity of the auxiliary supply, CB trip coil, auxiliary switch, C.B. secondary isolating contacts ...

Page 280 - Close Circuit Supervision Connections

7SR242 Duobias Applications Guide ©2010 Siemens Protection Devices Limited Chapter 7 Page 48 of 56 5.4.2 Close Circuit Supervision Connections R BI +ve -ve + BO 1 BO n Remote Alarm BO R CLOSE COIL 52a 52b - Circuit Breaker Resistor:30V dc Nominal: R = 3K9 48V dc Nominal: R = 5K6 110V dc Nominal: R =...

Page 281 - Section 6: Application Considerations and Examples

7SR242 Duobias Applications Guide Section 6: Application Considerations and Examples 6.1 The Effects of An In Zone Earthing Transformer The in zone earthing transformer is a source of zero-sequence fault current. An earth fault on the delta side of the transformer external to the differential protec...

Page 283 - Protection of Star/Star Transformer With Tertiary

7SR242 Duobias Applications Guide 6.2 Protection of Star/Star Transformer With Tertiary Winding Figure 6-4: The provision of the tertiary winding in star/star transformers both stabilises the neutral potential and can allow earth fault current to flow in the secondary connections i.e. reduces the ze...

Page 284 - Yd11 Transformer Connected as Yd9 (90; Solution 1

7SR242 Duobias Applications Guide 6.3 Transformer with Primary Connections Crossed on Both Windings Yd11 Transformer Connected as Yd9 (90 0 ) The phase-shift between the W1 and W2 primary systems may necessitate that primary connections to each winding of the transformer have to be crossed. Fig. 6.4...

Page 285 - Solution 2

7SR242 Duobias Applications Guide Solution 2 Figure 6.4-2 shows use of the ICT Connection settings to correct for the phase shift introduced by the transformer connection i.e. ICT1 Connection is set to to Yd9, -90° and ICT2 Connection is set to Ydy0, 0°. ICT1 = Yd9 W1/W2 Yd11 (30 o ) 17 18 1 2 5 6 9...

Page 286 - Transformer with Primary Connections Crossed on One

7SR242 Duobias Applications Guide 6.4 Transformer with Primary Connections Crossed on One Winding Reversing the connections on only one side of the transformer will reverse the phase sequence of the system. For this arrangement W1 and W2 CT secondary wiring must be crossed over to replicate the cros...

Page 287 - Protection of Auto Transformers

7SR242 Duobias Applications Guide 6.5 Protection of Auto Transformers The transformer has a phase shift of zero. To prevent undesired tripping of the overall differential protection for external faults a zero sequence shunt is required, this is implemented by selecting star/delta ICT Connection sett...

Page 288 - Reactor and Connections Protection

7SR242 Duobias Applications Guide 6.6 Reactor and Connections Protection 17 18 1 2 5 6 9 10 14 13 I G1 2 1 6 5 10 9 W1 I L1 W1 I L2 W1 I L3 ICT1 = Yy0 ICT2 = Yy0 A 17 18 I G2 1 2 5 6 9 10 W2 I L1 W2 I L2 W2 I L3 A B Figure 6-10 AC Connections for Reactor and Connections Protection Settings must take...

Page 289 - Siemens Protection Devices Limited

Siemens Protection Devices Limited 2 5 Siemens Protection Devices Limited P.O. Box 8 Nor th Farm Road Hebburn Tyne & Wear NE31 1TZ United Kingdom Phone: +44 (0)191 401 7901 Fax: +44 (0)191 401 5575 Web: www.siemens.com/energy PTD 24h Customer Support Phone: +49 180 524 7000 Fax: +49 180 524 2471...

Siemens 242 - User Manual

Table of Contents:

Summary

Other Siemens Models