Basler BE1-951 User manual

INSTRUCTION MANUAL
FOR
OVERCURRENT PROTECTION SYSTEM
Publication: 9 3289 00 990
Revision: F 08/2002
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BE1-951 Introduction i
W A R N I N G !
TO AVOID PERSONAL INJURY OR EQUIPMENT DAMAGE, ONLY
QUALIFIEDPERSONNELSHOULDPERFORMTHEPROCEDURES
PRESENTED IN THIS MANUAL.
INTRODUCTION
ThisinstructionmanualprovidesinformationabouttheoperationandinstallationoftheBE1-951Overcurrent
Protection System. A summary of the information provided is listed below.
 General information, specifications, and a
Quick Start guide.
 Functional description and setting parameters for the inputs and outputs, protection and control
functions, metering functions, and reporting and alarm functions.
 BESTlogic programmable logic design and programming.
 Documentation of the preprogrammed logic schemes and application tips.
 DescriptionofsecurityandtheuserinterfacesetupincludingASCIIcommunicationandtheHuman-
Machine Interface (HMI).
 Installation procedures, dimension drawings, and connection diagrams.
 Description of the front panel HMI and ASCII command interface with write access security
procedures.
 A summary of setting, metering, reporting, control, and miscellaneous commands.
 Testing and maintenance procedures.
 Appendices containing characteristic curves, an ASCII command–HMI cross reference, relay
settings record forms, terminal emulation guidelines, and an index.
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ii Introduction BE1-951
CONFIDENTIAL INFORMATION
OF BASLER ELECTRIC COMPANY, HIGHLAND, IL. IT IS LOANED FOR
CONFIDENTIAL USE, SUBJECT TO RETURN ON REQUEST, AND WITH THE
MUTUAL UNDERSTANDING THAT IT WILL NOT BE USED IN ANY MANNER
DETRIMENTAL TO THE INTEREST OF BASLER ELECTRIC COMPANY.
First Printing October 1999
Printed in USA
© 1999 - 2002 Basler Electric Co., Highland, IL 62249
August 2002
It is not the intention of this manual to cover all details and variations in equipment, nor does this manual
provide data for every possible contingency regarding installation or operation. The availability and design
ofallfeaturesandoptionsaresubjecttomodificationwithoutnotice. Shouldfurtherinformationberequired,
contact Basler Electric Company.
BASLER ELECTRIC
ROUTE 143, BOX 269
HIGHLAND, IL 62249 USA
http://www.basler.com, [email protected]
PHONE [phone] FAX [phone]
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BE1-951 Introduction iii
PRODUCT REVISION HISTORY
The following information provides a historical summary of the changes made to the embedded software
(firmware)andhardwareofthisdevice.Thecorrespondingrevisionsmadetothisinstructionmanualarealso
summarized.Thisrevisionhistoryisseparatedintothreecategories:ApplicationProgramFirmwareVersion,
Hardware Changes, and Manual Revisions. All revisions are listed in chronological order.
APPLICATION
PROGRAM
FIRMWARE
VERSION Change
2.52.01/10-01-01
1.51.00/3-1-01
Added real time clock with 8 hour capacitor backup on all BE1-951 version 2
relays.
Added support for 4000 point load profile demand log and battery backup for
real time clock.
Added or revised the following protection and control functions:
 Added the 32 overpower element
 Added the 159X auxiliary Overvoltage element
 Added the 86 and 186 virtual lockout switches
 Updated the 25 Sync-Check so that when operating in FG > BF mode, a
minimum slip frequency is required for a sync output.
 Updated the 67 function to be user selectable for reference and tripping
elements.
Added or revised the following reporting and alarm functions:
 The relay now performs a 2-cycle pre-dropout fault recording for use when
the 951 does not trip.
1.50.02/7-17-00 Added or revised the following protection and control functions:
 Corrected bug in 25VM, Sync Check Voltage Monitor function logic.
 Revised the 60FL, VT Fuse Loss function logic. Old algorithm required
breaker status to be true “closed” to enable the function.
 Corrected bug inautomatic setting group selection associatedwith changing
groups based upon recloser shot counter.
Added or revised the following reporting and alarm functions:
 Revised target display function for the front panel HMI to include Distance to
Fault.
1.50.01/6-12-00 Added or revised the following protection and control functions:
 Revised 60FL function. Reduced fixed time delay from 100 mSec to 50
mSec and coordinated order of processing of this functions with voltage
tripping functions that it supervises.
 Revised the 81, Over/Under frequency function logic. Old algorithm
allowed a trip on two consecutive cycles beyond the threshold setting.
Added or revised the following communications functions:
 Revised DNP3 protocol to pass level 2 compliance testing.
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APPLICATION
PROGRAM
FIRMWARE
VERSION Change
iv Introduction BE1-951
1.50.00/4-5-00 This version was released to provide major upgrades to the original
functionality provided by BE1-951 Overcurrent Protection System and was
mailed to all purchasers.
Added support (metering and recording) for optional VX, Auxilliary Voltage
input sensing. Added or revised the following functions associated with this
input:
 Added 25/25VM, Sync Check with Voltage Monitor function.
 Added 27X, Auxiliary Undervoltage element.
 Revised 59X, Auxiliary Over voltage function to allow it to monitor the
frequency measured on the VX, Auxiliary Voltage input.
Added or revised the following additional protection and control functions:
 Added 24, Volts/Hertz Overexcitation element.
 Added 67, Directional Control for all Over current tipping elements.
Added or revised the following additional reporting and alarm functions:
 Added Distance to Fault function.
 Added optional load profile recording function.
 Revised the COMTRADE oscillographic recording function to allow the 240
cycles of oscillographic memory to be partitioned into 6 to 16 records.
Added *.HDR, COMTRADE header file to record the fault summary and
active settings associated with the fault.
 Revised power fail recovery logic and self diagnostics function to prevent
inadvertent resets of the microprocessor when operated on marginal AC
power supply source.
Added or revised the following communications functions:
 Corrected bugs in Modbus protocol.
1.02.02/4-7-00 This version was released after release of version 1.50.00, which was a major
upgrade in functionality for the relay. This version was released to correct bugs
in the original functionality and was mailed to all purchasers of the BE1-951
Over current Protection System.
 Revised power fail recovery logic and self diagnostics function to prevent
inadvertent resets of the microprocessor when operated on marginal AC
power supply source.
 Corrected bugs in Modbus protocol.
 Revised the COMTRADE oscillographic download function to prevent an
invalid COMTRADE file from being created if the oldest record is being
overwritten by a trigger in the middle of the process of transferring the file.
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APPLICATION
PROGRAM
FIRMWARE
VERSION Change
BE1-951 Introduction v
1.02.01/1-31-00
1.02.00/11-10-99
1.01.00/8-26-99
Revised the following reporting and alarm functions:
 Revised power fail recovery logic and self diagnostics function to reduce
the possibility of inadvertent resets of the microprocessor when operated
on marginal AC power supply source.
Added or revised the following protection and control functions:
 Revised the ASCII command interface to use SG-CTG as the command to
set the CT ratio for the Optional Independent Ground input. Originally, the
command was SG-CTN. The change was made to make it consistent with
the conventions used. IN, the neutral current, is the residual of the three-
phase current input. IG, the ground current, is the current measured at the
independent ground current input.
Note
The above change makes all previous versions of firmware incompatible with
BESTCOMS, Graphical User Interface Software.
 Revised the 60FL, VT fuse Loss logic function to allow automatic blocking
logic to be individually set for current and voltage functions.
 Corrected bug in 51/27R voltage control phase time Over current function
that blocked Over current tripping for a 60FL condition when voltage
control was set to Mode C but disabled by setting (S#-27R=0,C)
Added or revised the following reporting and alarm functions:
 Revised oscillographic recording function to increase memory allocation to
240 cycles of sample data.
 Revised the target reporting function to allow various functions to adapt the
targets that they post based upon user setup parameters.
 Revised the TCM, Trip Circuit Monitor function to allow its application with
AC tripping voltages.
 Revised Watt/VAR metering and demand functions for full four quadrant
metering.
 Revised the V2, negative sequence volgate measurement function to
properly scale to V phase to neutral base regardless of the three phase VT
connection parameter setting.
1.00.01/5-12-99 Initial Release
Hardware Version Change
10-5-01
05-30-99
Added battery backup to H1 case only. Change overlay to incorporate new
adhesive label.
Initial Release.
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vi Introduction BE1-951
Manual Version
and ECO/ECA Change
E/15059
D/12499
C/10201
B/9101
A/7036
Updated Sections 1,3,4,12, and 13 to reflect required information about battery
backup, real time clock, and control input jumper configurations.
Updated Section 4 to reflect the changes in the protection and control
elements. Updated the remaining sections of the manual in accordance to the
relays new functions.
Updated the drawings and text of the manual to reflect the UL and CSA
approval. Added a new testing section. Completed a general read through of
the manual, updating text in order to clarify given information and complete an
overall consistency in the manuals appearance.
Manual was revised to reflect to reflect Phase II information. This included
adding new functions such as the 24, 25, and 67 elements. Auxiliary elements
for 27 and 59 elements were added. Distance to fault was added. Added
information on Variable length Oscillographic recording. Increased the style
number to 7 digits. Revised manual to single volume binder from 3 volume
bound set.
This manual revision includes the following changes.
1. Volume1, Section 4, Protection and control, VT fuse Loss
Detection was updated to cover enhancements made to the 60FL
function.
2. A combined index for both volumes was placed at the end of
each volume.
3. Minor revisions and corrections were made throughout the
manual.
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BE1-951 Introduction vii
CONTENTS
SECTION 1 General Information ....................................... 1-1
SECTION 2 Quick Start .............................................. 2-1
SECTION 3 Input and Output Functions ................................. 3-1
SECTION 4 Protection and Control ..................................... 4-1
SECTION 5 Metering ................................................ 5-1
SECTION 6 Reporting and Alarm Functions .............................. 6-1
SECTION 7 BESTlogic Programmable Logic ............................. 7-1
SECTION 8 Application .............................................. 8-1
SECTION 9 Security ................................................ 9-1
SECTION 10 Human-Machine Interface ................................. 10-1
SECTION 11 ASCII Command Interface ................................. 11-1
SECTION 12 Installation ............................................. 12-1
SECTION 13 Testing and Maintenance ................................. 13-1
APPENDIX A Time-Current Characteristics ................................ A-1
APPENDIX B Command Cross Reference ................................ B-1
APPENDIX C Relay Setting Record ...................................... C-1
APPENDIX D Setting Terminal Communications ............................ D-1
INDEX ..........................................................i
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BE1-951 General Information i
SECTION 1 • GENERAL INFORMATION
TABLE OF CONTENTS
SECTION 1 • GENERAL INFORMATION ............................................... 1-1
DESCRIPTION ................................................................. 1-1
FEATURES ................................................................... 1-1
Input and Output Functions ................................................... 1-1
Power System Measurement Functions ....................................... 1-1
Contact Sensing Inputs .................................................... 1-2
Contact Outputs .......................................................... 1-2
Protection and Control Functions ............................................... 1-2
Directional Overcurrent Protection ........................................... 1-2
Voltage Protection ........................................................ 1-2
Directional Power Protection ................................................ 1-3
Frequency Protection ..................................................... 1-3
Breaker Failure Protection ................................................. 1-3
Fuse Loss Protection ...................................................... 1-3
General Purpose Logic Timers .............................................. 1-3
Setting Groups ........................................................... 1-3
Virtual Control Switches ................................................... 1-3
Virtual Lockout Protection .................................................. 1-3
Metering Functions .......................................................... 1-4
Reporting and Alarm Functions ................................................. 1-4
Energy Data Reporting .................................................... 1-4
Relay Identification ....................................................... 1-4
Clock .................................................................. 1-4
General Status Reporting .................................................. 1-4
Demand Reporting ....................................................... 1-4
Breaker Monitoring ....................................................... 1-4
Trip Circuit Monitoring ..................................................... 1-4
Fault Reporting .......................................................... 1-5
Sequence Of Events Recorder .............................................. 1-5
Alarm Function .......................................................... 1-5
Version Report .......................................................... 1-5
BESTlogic Programmable Logic ................................................ 1-5
Write Access Security ........................................................ 1-5
Human-Machine Interface (HMI) ................................................ 1-6
Communication ............................................................. 1-6
PRIMARY APPLICATIONS ....................................................... 1-6
MODEL AND STYLE NUMBER DESCRIPTION ....................................... 1-7
General ................................................................... 1-7
Sample Style Number ........................................................ 1-7
OPERATIONAL SPECIFICATIONS ................................................. 1-8
Metered Current Values And Accuracy ........................................... 1-8
Metered Voltage Values And Accuracy ........................................... 1-8
Metered Frequency Values And Accuracy ........................................ 1-8
Calculated Values And Accuracy ............................................... 1-8
Energy Data Reporting ....................................................... 1-8
Real Time Clock ............................................................ 1-9
IRIG ...................................................................... 1-9
Contact Inputs Recognition Time ............................................... 1-9
Time Overcurrent Functions ................................................... 1-9
Time-Current Characteristic Curves ............................................ 1-10
Instantaneous Overcurrent Functions ........................................... 1-10
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ii General Information BE1-951
Directional Element(67) ......................................................1-10
Volts/HZ (24) ...............................................................1-11
Directional Power (32, 132) ...................................................1-11
Sync-Check (25) ............................................................1-11
Sync-Check, Voltage Monitor (25VM) ...........................................1-11
Phase Undervoltage Function (27P) ............................................1-11
Auxiliary Undervoltage Function (27X) ...........................................1-12
Negative Sequence Voltage Protection (47) ......................................1-12
Phase Overvoltage Function (59P) .............................................1-12
Auxiliary Overvoltage Function (59X, 159X) ......................................1-12
Over/Underfrequency Functions (81, 181, 281, 381, 481, 581) .......................1-13
VT Fuse Loss Detection (60FL) ................................................1-13
ReclosingTimers(79)........................................................1-13
Breaker Fail Timer (BF) ......................................................1-13
General Purpose Timers (62, 162) .............................................1-13
Automatic Setting Group Characteristics ........................................1-14
BESTlogic Update Rate ......................................................1-14
GENERAL SPECIFICATIONS ....................................................1-14
AC Current Inputs With 5 A CT .................................................1-14
AC Current Inputs with 1 A CT .................................................1-14
Phase AC Voltage Inputs .....................................................1-14
Auxiliary AC Voltage Inputs ...................................................1-14
Analog To Digital Converter ...................................................1-14
Power Supply ..............................................................1-15
Output Contacts ............................................................1-15
Control Inputs ..............................................................1-15
Communication Ports ........................................................1-15
Display ...................................................................1-15
Surge Withstand Capability ...................................................1-16
Radio Frequency Interference (RFI) .............................................1-16
Electrostatic Discharge (ESD) .................................................1-16
CE Qualified ...............................................................1-16
CSA Certification ............................................................1-16
DNP Certified ..............................................................1-16
Environment ...............................................................1-17
Shock ....................................................................1-17
Vibration ..................................................................1-17
Weight ....................................................................1-17
Case Size .................................................................1-17
Figures
Figure 1-1. Style Chart ...............................................................1-7
Tables
Table 1-1. Burden .................................................................1-15
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BE1-951 General Information 1-1
SECTION 1 • GENERAL INFORMATION
DESCRIPTION
TheBE1-951OvercurrentProtectionSystemisaneconomical,microprocessorbased,multifunctionsystem
that is available in a drawout, H1 (half-rack) or S1 package. BE1-951 features include:
 Directional Three-Phase Overcurrent Protection
 Directional Ground Overcurrent Protection
 Directional Negative Sequence Overcurrent Protection
 Directional Power Protection
 Control Protection
 Breaker Failure Protection
 Automatic Reclosing
 Voltage Protection
 Frequency Protection
 Breaker Monitoring
 Metering Functions
 Communication
BE1-951relayshavefourprogrammablecontactsensinginputs,fiveprogrammableoutputs,and onealarm
output. Outputs can be assigned to perform protection, control, or indicator operations through logical
programming. For example, protection functions could be programmed to cause a protective trip. Control
functionscouldbeprogrammedtocauseamanualtrip,manualclose,orautomaticreclose. Indicatorscould
be configured to annunciate relay failure, a settings group change, and others.
Protectionschemedesignersmayselectfromanumberofpre-programmedlogicschemesthatperformthe
most common protection and control requirements. Alternately, a custom scheme can be created using
BESTlogic.
A simplified "How To Get Started" procedure for BE1-951 users is provided in Section 2,
Quick Start.
FEATURES
The BE1-951 relay includes many features for the protection, monitoring, and control of power system
equipment. These features include protection and control functions, metering functions, and reporting and
alarm functions. A highly flexible programmable logic system called BESTlogic allows the user to apply the
available functions with complete flexibility and customize the system to meet the requirements of the
protected power system. Programmable I/O, extensive communication features, and an advanced HMI
(Human-Machine Interface) provide easy access to the features provided.
The following informationsummarizes the capabilities of this multifunction device. Each feature, along with
how to set it up and how to use its outputs, is described in complete detail in the later sections of this
manual.
Input and Output Functions
InputfunctionsconsistofPowerSystemMeasurementandContactSensingInputs.ProgrammableContact
Outputsmakeuptheoutputfunctions.InputandOutputfunctionsaredescribedinthefollowingparagraphs.
Power System Measurement Functions
Three-phase currents and voltages are digitally sampled and the fundamental is extracted using a Discrete
Fourier Transform (DFT) algorithm.
Thevoltagesensingcircuitsautomaticallyconfigurethemselvesinternallyforsingle-phase,threewireorfour
wirevoltagetransformercircuits.Voltagesensingcircuitryprovidesvoltageprotection,frequencyprotection,
and watt/var metering. Neutral (residual) and negative sequence voltage magnitudes are derived from the
three-phase voltages. Digital sampling of the measured frequency provides high accuracy at off-nominal
values.
An auxiliary voltage sensing input provides protection capabilities for over/undervoltage monitoring of the
first and third harmonic of the VT source connected to the Vx input. This capability is useful for ground fault
protection or sync-check functions.
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1-2 General Information BE1-951
Each current sensing circuit is low burden and isolated. Neutral (residual) and negative sequence current
magnitudes are derived from the three-phase currents. An optional independent ground current input is
available for direct measurement of the current in a transformer neutral, tertiary winding, or flux balancing
current transformer.
Contact Sensing Inputs
Four programmable contact sensing inputs (IN1, IN2, IN3, and IN4) with programmable signal conditioning
provide a binary logic interface to the protection and control system. Each input function and label is
programmable using BESTlogic. A user-meaningful label can be assigned to each input and to each state
(open and closed) for use in reporting functions.
Contact Outputs
Five programmable general purpose contact outputs (OUT1, OUT2, OUT3, OUT4, and OUT5) provide a
binary logic interface to the protection and control system. One programmable, fail-safe contact output
(OUTA) provides an alarm output. Each output function and label is programmable using BESTlogic. A
user-meaningful name can be assigned to each output and to each state (open and closed) for use in
reporting functions. Output logic can be overridden to open, close, or pulse each output contact for testing
or control purposes. All output contacts are trip rated.
Protection and Control Functions
ProtectionfunctionsconsistofOvercurrent,Voltage,Frequency,BreakerReclosing,FuseLoss,andBreaker
Failure protection and general purpose logic timers. Setting Groups and Virtual Control Switches make up
the control functions. The following paragraphs describe each protection and control function.
Directional Overcurrent Protection
Directional overcurrent protection is provided by six instantaneous overcurrent functions and four
time-overcurrent functions. Digital signal processing filters out unwanted harmonic components while
providing fast overcurrent response with limited transient overreach and overtravel.
Each instantaneous overcurrent function has a settable time delay. Phase elements include 50TP and
150TP.Neutralelementsinclude50TNand150TN.NegativeSequenceelementsinclude50TQand150TQ.
Inversetime-overcurrentfunctionsareprovidedforphase,neutral,andnegativesequenceprotection.A51P
phase element, 51N and 151N neutral elements, and a 51Q negative sequence element are provided.
Time-overcurrent functions employ a dynamic integrating timing algorithm covering a range from pickup to
40 times pickup with selectableinstantaneous or integrated reset characteristics. Time-overcurrent curves
conform to the IEEE PC37.112 document and include seven curves similar to Westinghouse/ABB CO
curves, five curves similar to GE IAC curves, a fixed time curve, and a user programmable curve. Phase
time-overcurrent functions can be voltage restrained or controlled for generator backup applications.
Each overcurrent element can be individually set for forward, reverse, or non-directional control.
Voltage Protection
Onevoltsperhertzprotectiveelement provides overexcitationprotectionforageneratorand/ortransformer
(24).
One phase overvoltage and one phase undervoltage element provides over/undervoltage protection (27P,
59P). Phase overvoltage protection can be set for one of three, two of three, or three of three logic. When
a four-wire voltage transformer connection is used, overvoltage protection can be set for either phase-to-
phase voltage or phase-to-neutral voltage.
Two auxiliary overvoltage and one auxiliary undervoltage element provides over/undervoltage protection
(27X, 59X, 159X). Auxiliary voltage protection elements can be set to individually monitor the auxiliary
voltagefundamental,thirdharmonic,or phase3V0voltages.Groundunbalance protectionisprovidedwhen
the optional auxiliary voltage input is connected to a source of 3V0such as a broken delta VT.
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BE1-951 General Information 1-3
Withtheoptionalauxiliaryvoltageinputconnectedtothebus,onesync-checkfunctionprovidessynchronism
protection (25). Sync-check protection checks for phase angle difference, magnitude difference, frequency
difference (slip), and optionally, if the three-phase VT frequency is greater than the auxiliary VT frequency.
Two voltage monitor outputs (25VM1 and 25VM2) provide independent dead/live voltage closing logic.
One negative sequence overvoltage elementprovides protection for phase unbalance or a reverse system
phase sequence (47).
Voltage transformer circuit monitoring adds security by detecting problems in the voltage transformer
sensing circuits and preventing misoperations of the 27P, 47, 59P, and the 51/27 function (60FL).
Directional Power Protection
One directional power element(32) is included in the BE1-951 and can be set for forward or reverse power
protection. The relay can be used for any application requiring directional power flow detection including
intertieprotection(interconnectsbetweenanelectricutilityandasourceofnon-utilitygeneration).Thepower
measurement algorithm is adapted as appropriate for any possible three-phase or single-phase voltage
transformer connection. Directional Power is calibrated on a three-phase basis regardless of the voltage
transformer connection used.
Frequency Protection
Six over/underfrequency protection function blocks are provided: 81, 181, 281, 381, 481, and 581. Each
function block can be set for overfrequency or underfrequency operation.
Breaker Failure Protection
One breaker failure protection block (BF) provides programmable breaker failure protection.
Fuse Loss Protection
A fuse loss function protects against false tripping due to a loss of voltage sensing.
General Purpose Logic Timers
Two general purpose logic timers (62, 162) with six modes of operation are provided.
Setting Groups
Four setting groups allow adaptive relaying to be implemented to optimize BE1-951 settings for various
operating conditions. Automatic and external logic can be employed to select the active setting group.
Virtual Control Switches
BE1-951 virtual control switches include one virtual breaker control switch and four virtual switches.
Tripandclosecontrolofaselectedbreakercanbecontrolledbythevirtualbreakercontrolswitch(101).The
virtual breaker control switch is accessed locally from the front panel human machine interface (HMI) or
remotely from the communication ports.
Additional control is provided by the four virtual switches:43, 143,243, and 343. These virtual switches are
accessed locally from the front panel HMI or remotely from the communication ports. Virtual switches can
be used to trip and close additional switches or breakers, or enable and disable certain functions.
Virtual Lockout Protection
The BE1-951 includes two virtual lockout functions (86 and 186) that emulate electric reset lockout relays
andoperateasasimpleflip/flop.Whenthetripinputisasserted,theoutputofthefunctiontogglestothetrue
state and when the reset input is asserted, the output of the function toggles to the false state. If both inputs
are asserted at the same time, the trip input always has priority. The state of the lockout (latch) is stored in
non-volatile memory.
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1-4 General Information BE1-951
Metering Functions
Meteringisprovided for all measured currents,voltages and frequencyand all derived neutraland negative
sequence currents and voltages. Three phase watts, vars, and power factor is provided. Per phase watts
and and vars is also provided when the VT connection is 4W.
Reporting and Alarm Functions
Several reporting and alarm functions provide fault reporting, demand, breaker and trip circuit monitoring,
as well as relay diagnostic and firmware information.
Energy Data Reporting
Ener
gy
information inthe form of watt-hours and var-hours is measured and re
p
orted b
y
theBE1-951.Both
positive and negative values are reported in three-phase, primary units.
Relay Identification
Twofree-formfields are providedfortheusertoenterinformationto identifytherelay.Thesefieldsareused
bymanyofthereportingfunctionstoidentifytherelaythatthereportis from.Examplesofrelayidentification
field uses are station name, circuit number, relay system, purchase order, and others.
Clock
A real-time clock is included with a capacitor backup and is available with an optional battery backup.
Depending upon conditions, capacitor backup maintains timekeeping during an eight to 24 hour loss of
operating power. Battery backup maintains timekeeping when operating power is removed for five yearsor
longer.
A standard IRIG inputis provided for receiving time synchronization signals from a master clock. Automatic
daylight saving time compensation can be enabled.Time reporting is settable for 12 or 24-hour format. The
date can be formatted as mm/dd/yy or dd/mm/yy.
General Status Reporting
The BE1-951 provides extensive general status reporting for monitoring, commissioning, and
troubleshooting. Status reports are available from the front panel HMI or communication ports.
Demand Reporting
Ampere demand registers monitor phase A, B, C, Neutral, ±Power (kW), ±Reactive Power (kvar), and
NegativeSequencevalues.Thedemandintervalanddemandcalculationmethodareindependentlysettable
for phase, neutral, and negative sequence measurements. Demand reporting records today's peak,
yesterday's peak, and peak since reset with time stamps for each register.
Breaker Monitoring
Breaker statistics are recorded for a single breaker. They include the number of operations, accumulated
interrupted I or I2and breaker time to trip. Each of these conditions can be set to trigger an alarm.
Trip Circuit Monitoring
A trip circuit monitor function is provided to monitor the trip circuit of a breaker or lockout relay for loss of
voltage(fuseblown)orloss of continuity(tripcoilopen).Themonitoringinputisinternallyconnectedacross
OUT1. Additional trip or close circuit monitors can be implemented in BESTlogic using additional inputs,
logic timers, and programmable logic alarms.
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BE1-951 General Information 1-5
Fault Reporting
Faultreportsconsistofsimpletargetinformation,faultsummaryreports,anddetailedoscillographyrecords
to enable the user to retrieve information about disturbances in as much detail as is desired. The relay
records and reports oscillography data in industry standard IEEE, Comtrade formatto allow using any fault
analysissoftware.BaslerElectricprovidesaWindows®basedprogramcalledBESTwavethatcanreadand
plot binary or ASCII format files that are in the COMTRADE format.
Sequence Of Events Recorder
A 255 event Sequence of Events Recorder (SER) is provided that records and time stamps all relay inputs
and outputs as well as all alarm conditions monitored by the relay. Time stamp resolution is to the nearest
half-cycle. I/O and Alarm reports can be extracted from the records as well as reports of events recorded
during the time span associated with a specific fault report.
Alarm Function
Extensive self diagnostics will trigger a fatal relay trouble alarm if any of the relay core functions are
adversely affected. Fatal relay trouble alarms are not programmable and are dedicated to the Alarm output
(OUTA)andthefrontpanelRelayTroubleLED.Additionalrelaytroublealarmsandallotheralarm functions
are programmable for major or minor priority. Programmed alarms are indicated by major and minor alarm
LEDs on the front panel. Major and minor alarm points can also be programmed to any output contact
including OUTA. Over 20 alarm conditions are available to be monitored including user definable logic
conditions using BESTlogic.
Active alarms can be read and reset from the front panel HMI or from the communication ports. A historical
sequence of events report with time stamps lists when each alarm occurred and cleared.These reports are
available through the communication ports.
Version Report
Theversionoftheembeddedsoftware(firmware)isavailablefromthefrontpanelHMIorthecommunication
ports. The unit serial number and style number is also available through the communication port.
BESTlogic Programmable Logic
Each BE1-951 protection and control function is implemented in an independent function element. Every
function block is equivalent to its single function, discrete device counterpartso it is immediately familiar to
the protection engineer. Each independent function block has all of the inputs and outputs that the discrete
component counterpart might have. Programming with BESTlogic is equivalent to choosing the devices
requiredbyyourprotectionandcontrolschemeandthendrawingschematicdiagrams toconnectthe inputs
and outputs to obtain the desired operating logic.
Several preprogrammed logic schemes and a set ofcustom logic settings are provided. A preprogrammed
scheme can be activated by merely selecting it. Custom logic settings allow you to tailor the relay
functionality to match the needs of your operation's practices and power system requirements.
Write Access Security
Security can be defined for three distinct functional access areas: Settings, Reports, and Control. Each
access area can be assigned its own password. A global password provides access to all three functional
areas. Each of the four passwords can be unique or multiple access areas can share the same password.
Aseconddimensionofsecurityisprovidedbyallowingtheusertorestrictaccessforanyoftheaccessareas
to only specific communication ports. For example, you could set up security to deny access to control
commands from the rear RS-232 port that is connected through a modem to a telephone line.
Security settings only affect write access. Read access is always available in any area through any port.
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1-6 General Information BE1-951
Human-Machine Interface (HMI)
Each BE1-951 comes with a front panel display with five LED indicators for Power Supply Status, Relay
Trouble Alarm, MinorAlarm, Major Alarm,and Trip.The lighted,liquid crystaldisplay (LCD)allowstherelay
to replace local indication and control functions such as panel metering, alarm annunciation, and control
switches. Fourscrolling pushbuttons onthe front panel provide a means to navigatethrough themenu tree.
Edit and Reset pushbuttons provide access to change parameters and reset targets, alarms, and other
registers. In Edit mode, the scrolling pushbuttons provide data entry selections. Edit mode is indicated by
an Edit LED on the Edit pushbutton.
The LCD has automatic priority logic to govern what is being displayed on the screen so that when an
operator approaches, the information ofmost interest is automatically displayed without having to navigate
the menu structure. The order of priorities are:
Å
Recloser active
Æ
Targets
Ç
Alarms
È
Programmable automatic scrolling list
Up to 16 screens can be defined in the programmable, automatic scroll list.
Communication
Threeindependent,isolatedcommunicationportsprovideaccesstoallfunctionsintherelay.COM0isanine
pin RS-232 port located on the front of the case. COM1 is anine pin RS-232 port located on the back of the
case. COM2 is a two wire RS-485 port located on the back of the case.
An ASCII command interface allows easy interaction with the relay using standard, off the shelf
communicationsoftware.TheASCIIcommandinterfaceis optimizedtoallowautomationoftherelaysetting
process. Settings files can be captured from the relay and edited using any software that supports the *.txt
file format. These ASCII text files can then be used to set the relay using the send text file function of your
communication software.
ASCII, ModbusTM , DNP 3.0 and Basler®TNP protocols are optionally available for the RS-485
communication port. A separate instruction manual is available for each available protocol. Consult the
product bulletin or the factory for availability of these options and instruction manuals.
PRIMARY APPLICATIONS
The BE1-951 Overcurrent Protection System provides complete circuitprotection with multiple overcurrent
elements and is intended for use in any directional or non-directional overcurrent application. Its unique
capabilities make it ideally suited for applications where:
• Applications that require low burden to extend the linear range of CTs.
• Applicationsthatrequirehighaccuracyacrossawidefrequencyrangesuchasformotor,generator,
and generator step-up transformer protection, or in co-generation facilities.
• Applications that requirethe flexibilityprovided by wide settings range,multiple setting groups, and
multiple coordination curves in one unit.
• Applications that require the economy and space savings provided by a multifunction, multiphase
unit. This one unit can provide all of the protection, control, metering, and local and remote
indication functions required on a typical circuit.
• Applications that require directional control and fault locating.
• Applications requiring protection of an intertie between dispersed storage and generation facilities
(DSG) and a utility.
• Transformer backup applications where overexcitation protection is required.
• Applications that require communications and protocol support.
• Applications where the capabilities of a digital multifunction relay are required, yet draw out
construction is also desirable.
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BE1-951 General Information 1-7
Figure 1-1. Style Chart
• ApplicationswherebusprotectionisprovidedbyahighspeedOvercurrentblocking schemeonthe
transformer bus mains instead of a dedicated bus differential circuit.
• Applications where the small size and limited behind-panel projection facilitates modernizing
protection and control systems in existing substations.
MODEL AND STYLE NUMBER DESCRIPTION
General
TheBE1-951Relayelectricalcharacteristicsandoperationalfeaturesaredefinedbyacombinationofletters
and numbers that make up thestyle number. Themodel number, together with the style number, describe
the options included in a specific device, and appear in the clear window on the front panel and on a sticker
located inside the case. Upon receipt of a relay, be sure to check the style number against the requisition
and the packing list to ensure that they agree.
Sample Style Number
Style number identification chart, Figure 1-1, defines the electrical characteristics and operational features
included in BE1-951 Relays. For example, if thestyle number were E3N1H0N, the device would have the
following characteristics and features.
BE1-951 - Three-phase current and three-phase voltage inputs
(E) - 5 ampere nominal system with 5 ampere independent ground input
(3) - Three-phase sensing
(N) - Not applicable (H1 case)
(1) - 48/125 Vac/Vdc power supply
(H) - H1 case
(0) - ASCII communication
(N) - None
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1-8 General Information BE1-951
OPERATIONAL SPECIFICATIONS
BE1-951 relays have the following features and capabilities.
Metered Current Values And Accuracy
Current Range: 5A: 0.5 to 15
1A: 0.1 to 3.0
Accuracy: ±1% of reading, ±1 least significant digit at 25  C
Temperature Dependence:  ±0.02% per  C
Metered Voltage Values And Accuracy
Voltage Range
3 wire: 0 to 300 VL-L
4 wire: 0 to 300 VL-L
Accuracy (10 to 75 hertz)
50 V to 300 V: ±0.5% of reading, ±1 least significant digit at 25  C
Temperature Dependence:  ±0.02% per  C
Metered Frequency Values And Accuracy
Frequency Range: 10 to 75 hertz
Accuracy: ±0.01 hertz, ±1 least significant digit at 25  C
Sensing Input
3-wire: Phase A – B
4-wire: Phase A – Neutral
Minimum Frequency Tracking Voltage: 10 V RMS
Calculated Values And Accuracy
Demand
Range: 0.1 to 1.5 nominal
Type: Exponential
Accuracy: ±1% of reading ± 1 digit at 25  C
Temperature Dependence:  ±0.02% per  C
Interval: 1 to 60 minutes
True Power
Range:
5 Ampere CT: -7,500 kW to +7,500 kW
1 Ampere CT: -1,500 kW to + 1,500 kW
Accuracy: ±1% at unity power factor
Reactive Power
Range:
5 Ampere CT: -7,500 kvar to +7,500 kvar
1 Ampere CT: -1,500 kvar to +1,500 kvar
Accuracy: ±1% at zero power factor
Energy Data Reporting
Range: 5 Ampere Unit: 100MWh
1 Ampere Unit: 100MWh
Units of Measure: Kilo, Mega, Giga
Rollover value of Registers: 100,000
Accuracy: ±1% at unity power factor
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BE1-951 General Information 1-9
Real Time Clock
Accuracy: 1 second per day at 25  C (free running) or
±2 milliseconds (with IRIG synchronization)
Resolution: 1 millisecond
Date and Time Setting Provisions: Front panel, communications port, and IRIG.
Leap year and selectable daylight saving time
correction provided.
Clock Power Supply Holdup
Capacitor: 8 to 24 hours, depending on conditions
Battery: Greater than 5 years.
Backup Battery (Optional): Lithium battery 3.6 Vdc, 0.95 AH
(Basler P/N: 9 3187 00 012)
(Applied Power P/N: BM551902)
IRIG Supports IRIG Standard 200-98, Format B002
Input Signal: Demodulated (dc level-shifted digital signal)
Logic-High Voltage: 3.5 Vdc, minimum
Logic-Low Voltage: 0.5 Vdc, maximum
Input Voltage Range: ±20 Vdc, maximum
Resistance: Non-linear, approximately 4 k
$
at 3.5 Vdc,
approximately 3 k
$
at 20 Vdc
Contact Inputs Recognition Time Programmable, 4 to 255 milliseconds
Time Overcurrent Functions
Current Pickup, Phase & Neutral (51P, 51N, 151N) Dropout/pickup ratio: 95%
Pickup Accuracy:
5 Ampere CT: ±2% or ±50 mA
1 Ampere CT: ±2% or ±10 mA
Current Pickup, Negative Sequence (51Q) Dropout/pickup ratio: 95%
Pickup Accuracy:
5 Ampere CT: ±3% or ±75 mA
1 Ampere CT: ±3% or ±15 mA
Current Input All 51 Functions
5 Ampere CT:
Range: 0.50 to 16.0 A
Increments: 0.01 from 0.50 to 9.99, 0.1 from 10.0 to 16.0
1 Ampere CT:
Range: 0.10 to 3.2 A
Increments: 0.01 A
NOTE
All timing specifications are for the worst case response. This includes output
contact operate times and standard BESTlogic operation timing, but excludes
input debounce timing and non standard logic configurations. If a non-standard
logicschemeinvolvesfeedback,thenoneor more BESTlogic update rate delays
must be included to calculate the worst case delay. An example of feedback is
Virtual Outputs driving Function Block Inputs. For more information, see Section
7,
BESTlogic Programmable Logic .
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1-10 General Information BE1-951
Time-Current Characteristic Curves
TimingAccuracy(All51Functions): Within±5%or±1½cycles whichever is greater for
timedialsettingsgreaterthan0.1andmultiplesof
2 to 40 times the pickup setting but not over 150
A for 5 A CT units or 30 A for 1 A CT units.
SeeAppendixA,Time-CurrentCharacteristicsfor
information on available timing curves.
Instantaneous Overcurrent Functions
Current Pickup Accuracy, Phase and Neutral
(50TP, 50TN, 150TP, 150TN): Dropout/pickup ratio: 95% or higher
5 Ampere CT: ±2% or ±50 mA
1 Ampere CT: ±2% or ±10 mA
Current Pickup Accuracy, Negative Sequence
(50TQ, 150TQ): Dropout/pickup ratio: 95% or higher
5 Ampere CT: ±3% or ±75 mA
1 Ampere CT: ±3% or ±15 mA
Current Pickup Ranges (50T, 150T):
5 Ampere CT
Range: 0.5 to 150.0 A
Increments: 0.01 from 0.50 to 9.99 A, 0.1 from 10.0 to 99.9 A,
and 1.0 from 100 A to 150 A
1 Ampere CT
Range: 0.1 to 30.0 A
Increments: 0.01 from 0.01 to 9.99 A, 0.1 from 10.0 to 30.0 A
Settable Time Delay Characteristics (50T, 150T): Definite time for any current exceeding pickup
Time Range: 0.00 to 60.0 seconds
Time Increments: One millisecond from 0 to 999 milliseconds, 0.1
secondfrom1.0to9.9seconds,1secondfrom10
to 60 seconds
Timing Accuracy (50TP, 50TN, 150TP, 150TN): ±0.5% or ±½ cycle whichever is greater plus trip
time for instantaneous response (0.0 setting)
Timing Accuracy (50TQ, 150TQ): ±0.5% or ±1 cycle whichever is greater plus trip
time for instantaneous response (0.0 setting)
Trip Time: For 0.0 delay setting:
(50TP, 50TN, 150TP, 150TN): 2¼ cycles maximum for currents  5 times the
pickup setting. Three cycles maximum for a
current of 1.5 times pickup. Four cycles
maximum for a current of 1.05 times the pickup
setting
Trip Time: For 0.0 delay setting:
(50TQ, 150TQ, and 50T/150T): 3¼ cycles maximum for currents  5 times the
pickup setting. 4 cycles maximum for a current of
1.5 times pickup. Five cycles maximum for a
current of 1.05 times the pickup setting
Directional Element(67)
Mode: Forward, Reverse, Nondirectional
67P Polarization: Positive Sequence w/Memory
Negative Sequence
67Q Polarization: Negative Sequence
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