ABB REX 521 Technical Reference Manual, General
  1. Manuals
  2. Brands
  3. ABB Manuals
  4. Other
  5. REX 521
  6. Technical reference manual, general

ABB REX 521 Technical Reference Manual, General

Protection relay
Hide thumbs Also See for REX 521:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Operator's Manual, Technical Reference Manual, General
REX 521
Protection Relay
Technical Reference Manual, General

Advertisement

Table of Contents
loading

Related Manuals for ABB REX 521

Summary of Contents for ABB REX 521

  • Page 1 REX 521 Protection Relay Technical Reference Manual, General...

  • Page 3: Table Of Contents

    1MRS 751108-MUM Protection Relay REX 521 Issued: 27.6.2001 Technical Reference Manual, Version: B/05.07.2002 General Checked: Approved: MK We reserve the right to change data without prior notice. Contents 1. Safety information ..............5 2. Introduction ................6 2.1. General ..................6 2.2. Application ..................7 2.3.
  • Page 4 “Technical data of the measuring devices”, “Single-pole power outputs (PO)”, “Trip-circuit supervision”, “Technical data”, “Ordering information” - new terminal diagrams and terminal connections (High and Sensor) - new chapters: “Revision history”, “Revision history of the REX 521”, “Index” and “Appendix D”...

  • Page 5: Safety Information

    Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Safety information Dangerous voltages can occur on the connectors, even though the auxiliary voltage is disconnected National and local electrical safety regulations must always be followed The device contains components that are sensitive to electrostatic...

  • Page 6: Introduction

    1MRS 751108-MUM Technical Reference Manual, General Introduction This document provides a general description of the protection relay REX 521 Revision B. For more information about the earlier revisions, please refer to section “Revision history of the REX 521” on page 42.

  • Page 7: Application

    Technical Reference Manual, General 2.2. Application The REX 521 is designed for protection of incoming and outgoing feeders in medium voltage distribution substations. Further, the relay can, e.g., be applied to back-up protection of power transformers and back-up for high voltage line protection relays.

  • Page 8: Requirements

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General Requirements If the environmental conditions differ from those specified in section “Technical data”, as to temperature and humidity, or if the environmental conditions around the protection relay contains chemically active gases or dust, the relay should be visually inspected in association with the secondary testing.

  • Page 9: Technical Description

    Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Technical description 4.1. Functional description 4.1.1. Parametrization To ensure that a protection function block protects the feeder in the desired manner, the default values of parameters must be checked and set before taking the function block into use.

  • Page 10: Relay Setting Tool View

    Technical Reference Manual, General 4.1.1.3. Relay Setting Tool view To improve usability, a REX 521 specific pull-down menu, View, with three views has been created to the Relay Setting Tool. )LJ  5HOD\ 6HWWLQJ 7RRO YLHZV The Settings view includes the parameters for setting of all the function blocks. The Configuration view includes signalling and hardware related settings.

  • Page 11: Real-Time Clock (Rtc)

    The input voltage range of the power supply module is marked on the front panel of the REX 521 unit. The power supply version is specified by a letter in the order number of the protection relay (refer to section “Ordering information” on page 41).

  • Page 12: Low Auxiliary Voltage Indication

    In addition, current sensors (Rogowski coil) and voltage dividers developed by ABB can be used with the REX 521. The different versions of the REX 521 are provided with the following matching transformers and sensor inputs: Version...

  • Page 13: Technical Data Of The Measuring Devices

    The technical data of the measuring devices is set using the Relay Setting Tool or via HMI. The set values (Configuration\Meas.devices\) will affect the measurements carried out by the REX 521. 9DOXHV WR EH VHW IRU D FXUUHQW WUDQVIRUPHU • rated primary current (0...6000 A) of the current transformer •...
  • Page 14 REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General 9DOXHV WR EH VHW IRU D YROWDJH WUDQVIRUPHU • rated voltage of primary voltage transformer (0...440 kV) • rated voltage of voltage input (same as the secondary rated voltage of the primary voltage transformer connected to the voltage input, 100 V, 110 V, 115 V, 120 V) •...

  • Page 15: Digital Inputs

    Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Phase displacement error at voltage U Phase displacement error = - d (d = error in degrees) 5RJRZVNL FRLO Amplitude error at the whole measuring range Amplitude correction factor (e = error in per cent)

  • Page 16: Inversion Of Digital Inputs

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General The figure above illustrates the input filtering. At the beginning, the input signal is at high state, the first low state is filtered and no input status change is detected. The...

  • Page 17: Single-Pole Power Outputs (Po)

    Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General )LJ  +LJKVSHHG GRXEOHSROH SRZHU RXWSXW +632 The high-speed power output HSPO1 can also be connected as a single-pole power output where the object to be controlled (e.g. a circuit breaker) is electrically connected in series with the two relay contacts, see the figure below.

  • Page 18: Signalling Outputs (So)

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General 4.1.8.3. Signalling outputs (SO) The signalling relay outputs (SO1 and SO2) are not heavy-duty outputs and thus they cannot be used for controlling e.g. a circuit breaker. Available relay contacts are Normally Open/Normally Closed type (NO/NC), see the figure below.

  • Page 19: Trip-Circuit Supervision

    Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General 4.1.10. Trip-circuit supervision The trip-circuit supervision consists of two functional units: • a current limiter including the necessary hardware elements • a software-based function block, named TCS The supervision of the trip circuit is based on the constant current injection principle.

  • Page 20: Self-Supervision

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General )LJ  2SHUDWLQJ SULQFLSOH RI WKH WULSFLUFXLW VXSHUYLVLRQ ZLWKRXW DQ H[WHUQDO UHVLVWRU 7KH 7&6 EORFNLQJ VZLWFK LV VHW EORFNLQJ WKH 7&6 ZKHQ WKH FLUFXLW EUHDNHU LV RSHQ )LJ  2SHUDWLQJ SULQFLSOH RI WKH WULSFLUFXLW VXSHUYLVLRQ ZLWK DQ H[WHUQDO UHVLVWRU 7KH 7&6 EORFNLQJ VZLWFK LV RSHQ HQDEOLQJ WULSFLUFXLW...
  • Page 21 Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General The microcontroller and the program execution are supervised by a watchdog once every 100 ms. The selector, the A/D converter and other measuring input electronics are tested by checking a very accurate reference voltage once a minute. This is to ensure that a measured signal is real and not caused by a fault or disturbance in some input circuit, all to avoid false output signals.

  • Page 22: 1.Fault Indication

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General Even a total breakdown of the relay, e.g. on loss of power supply, will be detected as the IRF relay operates in a fail-safe mode, causing a signal when the relay drops off.

  • Page 23: Serial Communication

    The protection relay has two serial communication ports, one on the front panel and the other on the rear panel. The connector located on the front panel is a standard ABB optical connector that is intended to be used for setting the parameters of the protection relay. During the transmission of the parameters, an interface cable is connected between the relay and the standard RS-232 interface of a PC, running the Relay Setting Tool.

  • Page 24: 2.Front Panel Optical Connection For A Pc

    4.1.12.2. Front panel optical connection for a PC The front connector is standardized for ABB relay products and requires an opto- cable (ABB art. No 1MKC950001-1). The connector supports only the SPA bus protocol, and is connected to the RS-232 port of a standard PC.

  • Page 25: 4.Spa Bus

    Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General 4.1.12.4. SPA bus The SPA bus protocol uses an asynchronous serial communication protocol (1 start bit, 7 data bits + even parity, 1 stopbit). Adjustable parameters are “Baud rate” (default 9,6 kbps) and “SPA address” (slave number). The communication parameters for the front and the rear communication ports can be set individually.

  • Page 26: 5.Lon Bus

    The system very often resembles the system in the figure below. The protection, control or alarm functions are implemented by using the REX 521 protection relays and other RED 500 series protection relays, SPACOM units or other SPA bus devices (devices connected to the system via the SPA bus).
  • Page 27 15 seconds according to LAG 1.4. From the front panel, the user should configure the “Node number”, the “Subnet number” and the “Bit rate” of the REX 521 device. The LON bus event buffer includes 150 last events.

  • Page 28: 6.Iec 60870-5-103 Bus

    The physical bus topology is star-based. A star-coupler unit, e.g. RER 125, is needed for connecting the REX 521 unit to a control system.The line idle state of the fibre- optic interface is configurable (“light on” and “light off”) with a parameter “Tx mode”.

  • Page 29: Time Synchronization

    Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General 4.1.13. Time synchronization The time synchronization (Configuration\Time) of the protection relay can be given from different sources: 1. The time can always be given manually from the front panel. 2. The time synchronization can also be given externally. The master parameter for external synchronization source selection is called “Sync.

  • Page 30: Indication Leds

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General • optically isolated serial communication port $GGLWLRQDO IHDWXUHV RI WKH GLVSOD\ • contrast adjustment with temperature compensation • backlight control 4.1.15. Indication LEDs The relay is provided with three indication LEDs (green, yellow and red). With latching/non-latching, steady/blinking light the LEDs indicate different states and operations of the relay.
  • Page 31 Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Table 4.2.1-3 Digital inputs Type PS_87H PS_87L (REX521xxHxx) (REX521xxLxx) Operating range, dc 80…265 V dc 18...265 V (for DI9 18...265 V) Input voltage, dc 110/125/220 V (for DI9 24/48/60 /110/125/220 V...
  • Page 32 REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General Table 4.2.1-7 Standard tests Insulation tests Dielectric test Test voltage 2 kV, 50 Hz, 1 min. IEC 60255-5 Impulse voltage test Test voltage 5 kV, unipolar impulses, waveform 1,2/50 µ s, IEC 60255-5 source energy 0.5 J...
  • Page 33 Table 4.2.1-9 Data communication Rear interface, connector X3.2 Fibre-optic interface and X3.3 IEC_103 bus or SPA bus, selectable. Also LON bus in the REX 521 xxxxL versions. data transfer rates SPA bus: 4.8/9.6/19.2 kbps LON bus: 78.0 kbps/1.25 Mbps IEC_103 bus: 9.6/19.2 kbps...

  • Page 34: Terminal Diagram Of The Rex 521: Basic

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General 4.2.2. Terminal diagram of the REX 521: Basic )LJ  7HUPLQDO GLDJUDP RI WKH 5(;  %DVLF...

  • Page 35: Terminal Diagram Of The Rex 521: Medium

    Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General 4.2.3. Terminal diagram of the REX 521: Medium )LJ  7HUPLQDO GLDJUDP RI WKH 5(;  0HGLXP...

  • Page 36: Terminal Diagram Of The Rex 521: High

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General 4.2.4. Terminal diagram of the REX 521: High )LJ  7HUPLQDO GLDJUDP RI WKH 5(;  +LJK...

  • Page 37: Terminal Diagram Of The Rex 521: Sensor

    Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General 4.2.5. Terminal diagram of the REX 521: Sensor )LJ  7HUPLQDO GLDJUDP RI WKH 5(;  6HQVRU...

  • Page 38: Terminal Connections

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General 4.2.6. Terminal connections X4.1 X3.1 Service pin 1 X4.2 X3.2 X3.3 Made in Finland )LJ  5HDU YLHZ RI WKH 5(;  %DVLF X4.1 X3.1 Service pin X4.2 X3.2 X3.3...
  • Page 39 Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General X4.1 X3.1 Service pin X4.2 X3.2 X3.3 Made in Finland )LJ  5HDU YLHZ RI WKH 5(;  +LJK X4.1 X3.1 X2.1 X2.2 X2.3 Service pin X4.2 X3.2 X2.4 X3.3 X2.5...

  • Page 40: Service

    To achieve the best possible operation accuracy, all parts of a REX 521 product have been calibrated together. Thus, each product forms a whole for which no separate spare parts can be supplied.

  • Page 41: Ordering Information

    Order No: REX521BMHPSM01C. )LJ  2UGHU QXPEHU RI WKH 5(;  English is always available in the REX 521. When ordering, the other additional language must be defined according to the table below. Table 6.-1 Display language codes...

  • Page 42: Revision History Of The Rex 521

    Revision history of the REX 521 7.1. Revision identification The main releases of the REX 521 products are differentiated with the revision and configuration revision letters in the order number (refer to “Ordering information” on page 41). Table 7.1.-1 5HYLVLRQV RI WKH 5( X 521...

  • Page 43: References

    • Installation Manual 1MRS 750526-MUM • Technical Descriptions of Functions (CD-ROM) 1MRS750889-MCD 3DUDPHWHU DQG HYHQW OLVWV IRU WKH 5(;  • Parameter List for REX 521 1MRS751999-RTI • Event List for REX 521 1MRS752000-RTI • General Parameters for REX 521 1MRS752156-RTI •...

  • Page 44: Index

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General Index Analogue channels ..................12 Auxiliary power ..................12, 30 Auxiliary voltage ................11, 12, 30 Communication ..................33 CPU module ....................47 Current transformer ..................13 Customer feedback ..................46 Digital inputs Filtering ....................
  • Page 45 Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Power supply ....................11 Protocols IEC 60870-5-103 ............... 24, 28, 29, 48 LON ................... 24, 26, 29, 33 SPA ................ 24, 25, 27, 29, 33, 57 Rated values ....................12 Real-time clock ................... 11 Relay Setting Tool ..................9...

  • Page 46: Customer Feedback

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General Customer feedback Date: To fax: +358 10 224 1094 Category: Comment Query Complaint In case of feedback related to a specific product, please state the name of the product. Product:...
  • Page 47 Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Service report for the REX 521 Name of the station/project ___________________________________________________ (Fill in this form. Use one form per relay.) Date and time_______________________ Relay information Environment Marking strip MicroSCADA version ___________________ Order No.

  • Page 48: Appendix A: The Iec 60870-5-103 Bus

    Private definitions are basically used because of two reasons: 1. The standard does not define the signal. 2. The signal is defined by the standard but the REX 521 application signal interface differs from this model. Class 1 data buffering and priorities The internal IEC 60870-5-103/Class 1 buffer inside the REX 521 unit can store up to 50 spontaneous events.

  • Page 49: The Principle Of The Protection Functions Mapping

    Meas I ASDU can have four different profiles and Meas II has one profile. These five profiles are supported in the REX 521. In addition, there are five more private class 2 ASDU frames defined. The user can choose which one of these eleven measurand sets to use.

  • Page 50: Default Mappings

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General 11.5. Default mappings Explanations to the Table 11.5.-1: Status According to the IEC 60870-5-103 standard According to “Digitale Stationsleittechnik - Ergänze Empfehlungen zur Anwendung in Verteilnetzstationen” Private definition Function type Ftyp Note: If stated as *), the signal type Ftyp corresponds with the unit function type.
  • Page 51 Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Table 11.5.-1Class 1 data signals Function block Function block Ftyp IEC name (ABB name) Io> Non-directional earthfault general START 1, 9 NEF1Low Io> Non-directional earthfault TRIP> NEF1Low Io>> Non-directional earthfault TRIP>>...
  • Page 52 REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General Table 11.5.-1Class 1 data signals Function block Function block Ftyp IEC name (ABB name) 0-->I AR: CB opened manually or remotely AR5Func 0-->I AR: CB opening failure AR5Func 0-->I AR: closing inhibited AR5Func 0-->I...
  • Page 53 Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Table 11.5.-1Class 1 data signals Function block Function block Ftyp IEC name (ABB name) SYNC1 Synchro-check/voltage check, St 1, SC Ok SCVCSt1 SYNC1 Synchro-check/voltage check, St 1, Alarm not passed...
  • Page 54 REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General Commands Explanations to the Table 11.5.-2: Status According to the IEC 60870-5-103 standard According to “Digitale Stationsleittechnik - Ergänze Empfehlungen zur Anwendung in Verteilnetzstationen” Private definition Function type Ftyp Note: If stated as *), the signal type Ftyp corresponds with the unit function type.
  • Page 55 Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Class 2 measurand sets Explanations to the Table 11.5.-3: Class 2 measurand set No (1...11) SetNo According to the IEC 60870-5-103 standard Private definition Measurand class I or II Meas...
  • Page 56 REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General ([DPSOH If the set No 11 is used, the ASDU octets will look like in the following figure: )LJ  ([DPSOH RQ $6'8 RFWHWV...

  • Page 57: Appendix B: Parameters Visible Only In The Relay

    Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Appendix B: Parameters visible only in the relay Input 1 state Input 2 state Input 3 state Input 4 state Input 5 state Input 6 state Input 7 state Input 8 state...

  • Page 58: Appendix C: Parameters Which Cause Reset

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General Appendix C: Parameters which cause reset Rated frequency Select Io Voltage combine IL1: scaling IL2: scaling IL3: scaling Io: scaling Iob: scaling Uo: scaling Second. current Current trafo 1 Current trafo 1...
  • Page 59 Protection Relay REX 521 1MRS 751108-MUM Technical Reference Manual, General Current trafo 5 Corr. factor 2 Current trafo 5 Displ. error 2 Voltage trafo 1 Second. voltage Primary voltage Voltage trafo 1 Voltage trafo 1 Corr. factor Displ. error Voltage trafo 1 Voltage trafo 2 Second.

  • Page 60: Appendix D: Parameters Which Require Test Mode

    REX 521 Protection Relay 1MRS 751108-MUM Technical Reference Manual, General Appendix D: Parameters which require test mode Input 1 state Input 2 state Input 3 state Input 4 state Input 5 state Input 6 state Input 7 state Input 8 state...
  • Page 64 ABB Oy Substation Automation P.O. Box 699 FIN-65101 VAASA Finland Tel. +358 10 22 11 Fax. +358 10 224 1080 www.abb.com/substationautomation...

Table of Contents