ABB REL 301 User manual

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I.L. 40-386.3
It is recommended that the user of REL 301/302 equipment become acquainted with the information in this in-
struction leaflet before energizing the system. Failure to do so may result in injury to personnel or damage to
theequipment,andmayaffecttheequipmentwarranty.IftheREL301/302relaysystemismountedinacabinet,
the cabinet must be bolted to the floor, or otherwise secured before REL 301/302 installation, to prevent the
system from tipping over.
All integrated circuits used on the modules are sensitive to and can be damaged by the discharge of static elec-
tricity. Electrostatic discharge precautions should be observed when handling modules or individual
components.
ABB does not assume liability arising out of the application or use of any product or circuit described herein.
ABB reserves the right to make changes to any products herein to improve reliability, function or design. Spec-
ifications and information herein are subject to change without notice. All possible contingencies which may
arise during installation, operation, or maintenance, and all details and variations of this equipment do not pur-
port to be covered by these instructions. If further information is desired by purchaser regarding a particular in-
stallation, operation or maintenance of equipment, the local ABB representative should be contacted.
Copyright ©ASEA BROWN BOVERI, ABB Power T&D Company Inc. 1994
This document contains information that is protected by copyright. All rights are reserved. Reproduction, adap-
tation, or translation without prior written permission is prohibited, except as allowed under the copyright laws.
ABB does not convey any license under its patent rights nor the rights of others.
Trademarks
All terms mentioned in this book that are known to be trademarks or service marks are listed below.
In addition, terms suspected of being trademarks or service marks have been appropriately capitalized.
ABB Power T&D Company Inc. cannot attest to the accuracy of this information. Use of a term in this
book should not be regarded as affecting the validity of any trademark or service mark.
IBM and PC are registered trademarks of the International Business Machines Corporation
WRELCOM is the registered trademark of the ABB Power T&D Company Inc.
INCOM is the registered trademark of the Westinghouse Electric Corporation
!CAUTION

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I.L. 40-386.3
PREFACE
Scope
This manual describes the functions and features of the REL 301(Non-pilot Relay System) and REL
302 (Pilot Relay System). It is intended primarily for use by engineers and technicians involved in the
installation, testing, operation and maintenance of the REL 301/302 system.
Equipment Identification
The REL 301/302 equipment is identified by the Catalog Number on the REL 301/302 chassis name-
plate. The Catalog Number can be decoded by using Catalog Number Table in Section 1.6.6.Both REL
301 and REL 302 can be either vertically or horizontally mounted.
Production Changes
When engineering and production changes are made to the REL 301/302 equipment, a revision no-
tation (SUB #) is reflected on the appropriate schematic diagram, and associated parts information.
Equipment Repair
Repair work is done most satisfactorily at the factory. When returning equipment, contact your field
sales representative for RMR authorization. All equipment should be returned in the original packing
containers if possible. Any damage due to improperly packed items will be charged to the customer.
Document Overview
SECTION 1 provides the Product Description. SECTION 2 presents the Functional Specification.
SECTION 3 presents the Setting Calculations. Installation and Operation are described in SECTION
4. Finally, SECTION 5 covers Acceptance Test, Maintenance Test and Calibration procedures.
Contents of Relay System
The REL 301/302 Relay System includes the style numbers, listed below, for each module.
Module Style Number
FT-10 Surge Protection 1502B35
Backplane Surge Protection 1612C53
Option (Reclosing/synch-check) 1614C19
Filter (Input Module) 1612C34
Microprocessor 1613C55
Display (Optional) 1613C69
Power Supply/Relay Outputs 1612C68
VT 1612C80
CT 1612C79
RS232C Communications (Optional) 1614C94

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I.L. 40-386.3
TABLE OF CONTENTS
PAGE
SECTION 1PRODUCT DESCRIPTION
1.1 INTRODUCTION..............................................1-1
1.2 REL 301/302 FEATURES......................................1-2
1.3 REL 301/302 CONSTRUCTION...................................1-3
1.4 UNIQUE FEATURES...........................................1-4
1.5 UNIQUE REMOTE COMMUNICATION (WRELCOM®) PROGRAM .............1-6
1.6 SPECIFICATIONS .............................................1-7
SECTION 2FUNCTIONAL DESCRIPTION
2.1 INTRODUCTION..............................................2-1
2.2 LINE MEASUREMENT TECHNIQUES ................................2-1
2.3 MEASUREMENTS ZONES .......................................2-3
2.4 NON-PILOT OPERATION ........................................2-6
2.5 REL 302 PILOT SYSTEM ......................................2-13
2.6 PROGRAMMABLE CONTACT OUTPUTS..............................2-22
2.7 FAULT DATA ..............................................2-22
SECTION 3SETTINGS CALCULATIONS
3.1 MEASUREMENT UNITS AND SETTING RANGES .........................3-1
DISTANCE MEASUREMENTS
OVERCURRENT MEASUREMENTS
UNDERVOLTAGE MEASUREMENTS
3.2 CALCULATION OF REL 301/302 SETTINGS ..........................3-2
3.3 REQUIRED SETTINGS APPLICATIONS ...............................3-7
3.4 RECLOSE INITIATION MODE PROGRAMMING .........................3-12
SECTION 4INSTALLATION AND OPERATION
4.1 SEPARATING THE INNER AND OUTER CHASSIS ........................4-1
4.2 TEST PLUGS AND FTSWITCHES ..................................4-1
4.3 EXTERNAL WIRING ...........................................4-1
4.4 FRONT PANEL MAN-MACHINE INTERFACE ............................4-3
4.5 JUMPER CONTROLS ..........................................4-7
4.6 COMMUNICATION PORT(S)USE ...................................4-8
4.7 FRONT RS-232C COMMUNICATIONS PORT ...........................4-9
4.8 SIXTEEN FAULTS/TARGET DATA .................................4-10
4.9 OSCILLOGRAPHIC DATA .......................................4-10
4.10 PROGRAMMABLE CONTACT OUTPUTS..............................4-11
SECTION 5 REL 301/302 ACCEPTANCE TEST AND MAINTENANCE PROCEDURES
5.1 NON-PILOT ACCEPTANCE TESTS FOR REL 301/302....................5-3
5.2 PILOT ACCEPTANCE TESTS (FOR REL 302 ONLY).....................5-12
5.3 MAINTENANCE PROCEDURES ...................................5-14
5.4 CALIBRATION ..............................................5-15

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LIST OF FIGURES
PAGE
SECTION 1REL 301/302 RELAY ASSEMBLY IN FT-42 CASE (PHOTO)....................1-1
REL 301/302 LAYOUT (VERTICAL)(SHEET 1OF 2) .......................1-10
REL 301/302 LAYOUT (HORIZONTAL)(SHEET 2OF 2......................1-11
REL 301/302 OUTER CHASSIS (PHOTO)...............................1-12
REL 301/302 INNER CHASSIS (PHOTO)...............................1-13
REL 301/302 RELAY PROGRAM FUNCTIONS ............................1-14
SECTION 2REL 301/302 CHARACTERISTICS /R-X DIAGRAM ........................2-23
MHO CHARACTERISTIC FOR PHASE-GROUND FAULTS.......................2-24
MHO CHARACTERISTICS FOR THREE-PHASE FAULTS
(NOLOAD FLOW)..............................................2-25
MHO CHARACTERISTICS FOR PHASE-TO-PHASE AND
TWO PHASE-TO-GROUND FAULTS (NOLOAD FLOW)........................2-25
LOGIC DRAWING SYMBOLS ........................................2-26
REL 301/302 ZONE-1TRIP LOGIC..................................2-27
REL 301/302 ZONE-2TRIP LOGIC..................................2-27
REL 301/302 ZONE-3TRIP LOGIC..................................2-28
REL 301/302 ZONE-1EXTENSION SCHEME ...........................2-28
INVERSE TIME OVERCURRENT GROUND BACKUP LOGIC .....................2-29
LOSS-OF-POTENTIAL LOGIC ........................................2-29
LOSS-OF-POTENTIAL LOGIC (SYSTEM DIAGRAM)..........................2-30
LOSS OF CURRENT MONITORING LOGIC ................................2-30
OVERCURRENT SUPERVISION .......................................2-31
INSTANTANEOUS OVERCURRENT HIGHSET TRIP LOGIC ......................2-31
REL 301/302 CLOSE-INTO-FAULT TRIP (CIFT) LOGIC ....................2-32
REL 301/302 UNEQUAL-POLE-CLOSING LOAD PICKUP TRIP LOGIC ............2-32
LOAD LOSS ACCELERATED TRIP LOGIC ................................2-33
OUT-OF-STEP BLOCK LOGIC .......................................2-33
OUT-OF-STEP BLOCK LOGIC (BLINDER CHARACTERISTICS)...................2-33
RECLOSING INITIATION LOGIC.......................................2-34
POTT/UNBLOCKING PILOT RELAY ...................................2-34
POTT/UNBLOCKING PILOT TRIP LOGIC ................................2-35
CARRIER KEYING/RECEIVING LOGIC IN POTT/UNBLOCKING SCHEMES ..........2-35
PUTT SCHEME ................................................2-36
BLOCKING SYSTEM LOGIC .........................................2-36
PLTG SUPPLEMENTED BY FDOG ....................................2-37
REVERSED POWER ON POTT/UNBLOCKING SCHEMES......................2-37
UNEQUAL POLE CLOSING ON FAULT ..................................2-38
ADDITIONAL LOGIC FOR POTT/UNBLOCKING SCHEMES
ON 3-TERMINAL LINE APPLICATION ..................................2-38
ADDITIONAL LOGIC FOR PUTT SCHEME ON 3-TERMINAL
LINE APPLICATION .............................................2-39
WEAKFEED APPLICATION ..........................................2-39
REVERSIBLE ZONE-3PHASE AND GROUND (REVERSE BLOCK LOGIC)...........2-40
CO-2 CURVE CHARACTERISTICS.....................................2-41
CO-5 CURVE CHARACTERISTICS.....................................2-42
CO-6 CURVE CHARACTERISTICS.....................................2-43

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CO-7 CURVE CHARACTERISTICS.....................................2-44
CO-8 CURVE CHARACTERISTICS.....................................2-45
CO-9 CURVE CHARACTERISTICS.....................................2-46
CO-11 CURVE CHARACTERISTICS ....................................2-47
SECTION 4REL 301/302 TERMINALS ........................................4-13
REL 301/302 SYSTEM EXTERNAL CONNECTIONS (2 SHEETS) ............4-14, 4-15
SECTION 5FILTER (INPUT)MODULE ..........................................5-17
POWER SUPPLY (OUTPUT)MODULE ...................................5-18
MICROPROCESSOR MODULE........................................5-19
TEST CONNECTIONS FOR:
AØ-GROUND TEST ..........................................5-20
BØ-GROUND TEST..........................................5-21
CØ-GROUND TEST..........................................5-22
AØ-GROUND TEST (DUAL POLARIZING)............................5-23
TABLES
PAGE
SECTION 2PHASE AND GROUND SETTINGS (5 TABLES) ............................2-4, 2-5
SECTION 3TRIP TIME CONSTANTS FOR CURVES ....................................3-14
RECLOSING INITIATION MODE PROGRAMMING ..............................3-14
SECTION 4SETTING DISPLAY (4 SHEETS).........................................4-16
METERING DISPLAY................................................4-20
TARGET (FAULT DATA)DISPLAY (2 SHEETS)...............................4-21
PROGRAMMABLE CONTACT OUTPUTS ....................................4-23
COMMUNICATIONS CABLE REQUIREMENTS ................................4-24
DIP SWITCH SETTING CHART .........................................4-24
SECTION 5FILTER MODULE JUMPER SETTINGS .....................................5-2
POWER SUPPLY MODULE JUMPER SETTINGS................................5-2
MICROPROCESSOR MODULE JUMPER SETTINGS .............................5-2
SETTINGS (NON-PILOT SYSTEM).......................................5-24
SETTINGS (PILOT SYSTEM)...........................................5-25

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I.L. 40-386.3
REL 301 AND REL 302 Version 1.7
Features added and improvements made to Version 1.11
1. REL 301 AND 302
1.1 Modified Ground distance units from partially crossed-polarized mho to self-polarized mho
units for Zone1, Zone2, Zone3, and Pilot zone. The modification requires the addition of one
reverse reach setting for each zone. New settings are as follows:
• Zone1G R
• Zone2G R
• Zone3G R
• PilotG R
1.2 Improved 3 – phase fault distance trip performance by modifying the algorithms calculation
method.
1.3 Modified LED target coordination with stored target data for faulted phases.
1.4 Modified the performance of the programmable contact outputs for Low V (low voltage) signal
operation.Low V flagisset(contactwilloperate)when any phasegoesbelowtheLowVsetting
output to AND-45 A, reduces the likelihood of transient blocking logic being incorrectly enabled
for close-in faults in the forward direction.
2. REL 302 ONLY
2.1 Disabled reclose initiate from weakfeed logic. A weakfeed trip will not produce a reclose initiate
output.

I.L. 40-386.3
1-2 (10/94)
1. 2. REL 301/302 FEATURES
1.2.1 Standard Features for REL 301 (Non-Pilot)
• 3-Zone distance phase and ground relay, with reversible Zone3 phase and ground;
4 impedance units per zone: 3 phase-to-ground; 1 phase-to-phase.
• T1 timer (0 to 15 cycles)
• Independent timers for phase and ground
• Overcurrent supervision of phase and ground distance
• Selectable Zone2 torque controlled overcurrent (phase or ground)
• Inverse time directional or non-directional (selectable) overcurrent ground backup
logic
• Loss of potential supervision
• Loss of current monitoring
• Instantaneous forward directional phase and ground high set overcurrent trip
• Close Into Fault Trip
• Unequal-pole-closing load pickup logic
• Selectable Loss-of-Load accelerated trip logic
• Selectable Zone1 extension
• Current change fault detector (∆I)
• Voltage change fault detector (∆V)
• Fault data can be re-accessed by moving down to the Last Fault or Previous Fault
display mode
• Line voltage, current and phase angle monitoring
• Selectable polarizing for directional overcurrent ground units (zero sequence, nega-
tive sequence and dual
• Programmable Reclose initiation and reclose block outputs
• 100% Numerical processing
• Fault location capability
• Self-checking software
• Breaker trip circuit test
• Push-to-close test for output contacts
• Binary input test of contact input circuits
• Software switches for functional tests, e.g., (Carrier Send and Carrier Receivers)
• Trip contact sealed in by trip current, and selectable dropout delay of 0 or 50 ms
• 16 fault records with setting selectable data capture choices which trigger fault re-
cording
• Real-time clock
• Low voltage pickup setting for weakfeed logic and close into fault trip
• Setting positive sequence to zero sequence ratio
• Double blinder logic for out of step blocking
• RS-232C PONI or INCOM/PONI
• 16 sets of oscillographic data and intermediate target data. Each set includes 7 an-
alog graphic inputs and 24 digital. Each oscillographic target contains 1 prefault
and 7 fault cycles of data. Data collection can be started by TRIP, Z2 and trip, Z2Z3
and trip or ∆V∆I

I.L. 40-386.3
(10/94) 1-3
1.2.2 Standard Features for REL 302 (Pilot)
• All features listed as standard for the REL 301 are included in the REL 302 also
• Independent pilot phase and ground distance units
• Permissive Overreach Transfer Trip (POTT) /Simplified Unblocking
• Permissive Underreach Transfer Trip
• Directional Comparison Blocking Scheme
• POTT or Simplified Unblocking Weakfeed Terminal Logic
• Instantaneous Forward Directional Overcurrent Function for High Resistance
Ground Fault Supplement to Overreach Pilot
• Instantaneous Reverse Directional Overcurrent Ground Function for Carrier Start
on Blocking Scheme
• Reclose Block on Breaker Failure Squelch
• 3-Terminal Line Application
1.2.3 Optional Features for the Non-Pilot REL 301 and Pilot REL 302
• Self-polarized ground distance characteristics (Version 1.7X)
• RS-232C front communications port
• 5 programmable contact outputs
• Man Machine Interface (LCD Display)
• Reclosing with or without synchronism/Voltage Check
• 0 to 4 reclose attempts
• Instantaneous or time delay
• Reset Timer
• Live-Line Dead-Bus/Dead-Line Live-Bus logic
• Synchronism check
•120 Volt phase-to-phase synchronism voltage input (reference VS, VSR,
Figure 4-2)
1. 3. REL 301/302 CONSTRUCTION
All of the relay circuitry, with the exception of the first-line surge protection, is mount-
ed on the inner chassis, to which the front panel is attached. The outer chassis has a
backplate, which is a receptacle for all external connections, including a communica-
tion interface.The FT-10 switches permit convenient and safe disconnection of trip, ac
and dc input circuits, and provide for injection of test signals.
1.3.1 REL 301/302 Outer Chassis
This is an FT-42 case, where all the input/output signals are surge protected. All ex-
ternal connections are made through the rear of the case.
The outer chassis (Figure 1-4)consists of 2 surge protection modules, a backplane
surge protection module, a metal case, FT-switches and an communication interface
consisting of a Product Operated Network Interface (PONI) INCOM®or RS-232C that
is mounted on the back of the case from the inside on the backplane module.
1.3.2 REL 301/302 Inner Chassis
The inner chassis (Figure 1-5) consists of a frame, 2 switchjaws and the following mod-
ules. Each module is identified by silk screen label.