Basler BE1-67 User manual

INSTRUCTION MANUAL
FOR
PHASE DIRECTIONAL OVERCURRENT RELAY
BE1-67
Publication: 9 1709 00 990
Revision: G 05/2003

BE1-67 Introduction i
W A R N I N G !
TO AVOID PERSONAL INJURY OR EQUIPMENT
DAMAGE, ONLY QUALIFIED PERSONNEL SHOULD
PERFORM THE PROCEDURES PRESENTED IN THIS
MANUAL.
INTRODUCTION
This manual provides information concerning the operation and installation of the BE1-67 Phase Directional
Overcurrent Relay. To accomplish this, the following is provided:
!Specifications
!Functional description
!Verification and operational tests
!Mounting information
!Setting procedure/example

ii Introduction BE1-67
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: September 1988
Printed in USA
Copyright© 1988 - 2003 Basler Electric Co., Highland, IL 62249
May 2003
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 of
all features and options are subject to modification without notice. Should further information be required,
contact Basler Electric Company, Highland, Illinois.
BASLER ELECTRIC
ROUTE 143, BOX 269
HIGHLAND, IL 62249 USA
http://www.basler.com, [e-mail]
PHONE [phone] FAX [phone]

BE1-67 Introduction v
MANUAL REVISION HISTORY
The following information provides a historical summary of the changes made to this instruction manual. These
revisions are in chronological order with the most recent at the top.
Revision/Date and ECO Change
Rev G-05/03-18477
Changed Table 1-9, Style Chart , to make Timing match the BE1-
67N. Corrected the Basler publication number for characteristic
curves on page 1-15. Eliminated reference to a service manual on
pages 2-5 and 6-1 that no longer exists. Changed the
Power
Supply
portion in Sec. 3 regarding wide-range power supply
(similar to the BE1-60). Updated Figures 4-1, 4-3 and 4-4 with the
new style front panels. In
Setting the Pickups , Step 11, page 5-13,
added the Basler publication where the B6, Very Inverse, drawing
can be found. Updated the manual style throughout.
Rev F-11/95-15426 Changed Specifications for Isolation in Section I and Dielectric Test in
Section 4. Corrected
Setting The Relay - An Example in Section 5.
(Changed Time Delay from 5.2 seconds to 0.6 seconds in
Example
Defined
and Step 11.)
Rev E-08/94-14453 Revised the entire manual to the current instruction manual format.
Added internal connection diagrams, typical connection diagrams and
phase rotation sensitivity.
Rev D-07/89-11106 Corrected minor typographical errors.
Rev C-02/89-10811 The arrows indicating trip direction have been reversed in Figures 4-3
and 4-4.
Rev B-12/88-10724 Voltage sensing input rating corrected. Current sensing burden
statement on page 1-10 replaced former table on same page.
Rev A-09/88-10480 Test procedure simplified. Minor editing changes.

BE1-67 Introduction iii
TABLE OF CONTENTS
SECTION 1 !GENERALINFORMATION ............................................... 1-1
DESCRIPTION ................................................................. 1-1
LIMITED REGION OF OPERATION ................................................ 1-2
Load Current Approaches Fault Current .......................................... 1-3
Weak Infeed Condition ........................................................ 1-3
APPLICATION ................................................................. 1-4
SAMPLE APPLICATION CALCULATIONS ........................................... 1-5
Pickup..................................................................... 1-6
AnalysisOfFaultL ........................................................... 1-6
AnalysisOfFaultM .......................................................... 1-6
Conclusions ................................................................ 1-8
MODELANDSTYLENUMBER .................................................... 1-8
Style Number Identification Chart ................................................ 1-8
StyleNumberExample........................................................ 1-9
SPECIFICATIONS .............................................................. 1-9
Current Sensing Input(s) ..................................................... 1-10
CurrentSensingBurden...................................................... 1-10
Time Overcurrent Pickup Range ............................................... 1-10
PickupAccuracy............................................................ 1-10
Dropout Ratio .............................................................. 1-10
TimingCharacteristics ....................................................... 1-11
TimeDelayAccuracy ........................................................ 1-11
Instantaneous Overcurrent .................................................... 1-11
Voltage Sensing Inputs ...................................................... 1-12
Voltage Sensing Burden ...................................................... 1-12
Directional Unit ............................................................. 1-12
Sensitivity ................................................................. 1-12
CharacteristicAngle ......................................................... 1-12
Limited Range of Operation (Optional) ........................................... 1-13
Frequency Range ........................................................... 1-13
Power Supply .............................................................. 1-13
TargetIndicators ........................................................... 1-13
OutputCircuits ............................................................. 1-14
Isolation .................................................................. 1-14
UL Recognized ............................................................. 1-14
Surge Withstand Capability ................................................... 1-14
OperatingTemperature ...................................................... 1-14
Storage Temperature ........................................................ 1-14
Shock .................................................................... 1-14
Vibration .................................................................. 1-14
CHARACTERISTICCURVES .................................................... 1-15
SECTION 2 !HUMAN-MACHINEINTERFACE .......................................... 2-1
SECTION 3 !FUNCTIONAL DESCRIPTION ............................................ 3-1
GENERAL..................................................................... 3-1
INPUT CIRCUITS ............................................................... 3-1
CurrentSensing ............................................................. 3-1
Voltage Sensing ............................................................. 3-2
DIRECTIONALELEMENT ........................................................ 3-2
CharacteristicAngle .......................................................... 3-2
LimitedRegionOfOperation ................................................... 3-3
INDICATORS .................................................................. 3-4

iv Introduction BE1-67
InhibitLED's ................................................................ 3-4
TimingLED's ................................................................ 3-4
PowerLED's ................................................................ 3-4
FunctionTargets .............................................................3-4
ElementTargets .............................................................3-4
POWERSUPPLY ...............................................................3-4
LOGIC CIRCUITS ...............................................................3-5
Microprocessor ..............................................................3-5
Outputs ....................................................................3-5
TARGET INDICATOR CIRCUITS ...................................................3-6
SECTION 4 !INSTALLATION ........................................................ 4-1
GENERAL .....................................................................4-1
OPERATINGPRECAUTIONS......................................................4-1
DIELECTRICTEST ..............................................................4-1
MOUNTING .................................................................... 4-1
CONNECTIONS ................................................................ 4-8
SECTION 5 !TESTING ............................................................. 5-1
GENERAL .....................................................................5-1
Equipment Required ..........................................................5-1
PreliminarySetup ............................................................5-1
VERIFICATIONTESTING ......................................................... 5-3
TimeOvercurrentPickupTest...................................................5-3
Instantaneous Overcurrent Pickup Test ...........................................5-4
Directional Verification .........................................................5-4
TIMINGCURVEVERIFICATION .................................................. 5-10
DIRECTIONAL SETTING PROCEDURE ............................................5-11
CharacteristicAngle .........................................................5-11
LimitedRegionOfOperation...................................................5-11
VerifyingRelaySettings ......................................................5-12
SETTING THE RELAY - AN EXAMPLE .............................................5-12
ExampleDefined ............................................................5-12
SettingThePickups .........................................................5-13
SettingTheDirection.........................................................5-13
Setting The Limited Range Of Operation .........................................5-13
SECTION 6 !MAINTENANCE ........................................................6-1
GENERAL .....................................................................6-1
IN-HOUSE REPAIR ..............................................................6-1
STORAGE .....................................................................6-1
TESTPLUG .................................................................... 6-1

BE1-67 General Information 1-1
SECTION 1 GENERAL INFORMATION
DESCRIPTION
BE1-67 Phase Directional Overcurrent Relays are designed for the protection of transmission and distribution
lines where the direction as well as the magnitude of the fault current (or power flow) are to be considered in
the tripping decision.
BE1-67 relays are directionally controlled, microprocessor based, time overcurrent relays. The directional
element is polarized by the phase-to-phase quadrature voltage of the power system. That is, the directional
element monitoring the phase A current uses the voltage between phases B and C to determine the direction
of current (or power) flow into the fault. Then, if enough current flows in the tripping direction of the relay, the
relay will pickup, time out and trip. The angle of maximum sensitivity for the relay is also adjustable to allow
the directional characteristic to be matched to the line and system conditions. Figure 1-1 illustrates the
operation of the directional element and defines the terms that are used in the following discussion.
Figure 1-1. Single-Phase Directional Overcurrent
Figure 1-1a shows the connections to the sensing circuits for a single phase BE1-67. Figure 1-1b illustrates
the phasor quantities monitored by the relay for a unity power factor condition, and for a single phase fault.
Figure 1-1c shows the protected line on an R-X diagram. The angle alpha in Figures 1-1b and 1-1c are the
characteristic angle settings for the relay.
The directional characteristic of the relay is adjustable to allow the relay to be sensitive for phase faults and
to maximize sensitivity at the characteristic angle representing typical power factor.

1-2 General Information BE1-67
Figure 1-2. Trip Direction Defined
Twelve standard time-current characteristic curves are available to aid in the coordination of this relay with
other protective devices in the system. These include seven characteristic curves that are standard in North
America and five that are compatible with British or IEC standards requirements. In addition, an option allows
the relay to be supplied with all of these curves any of which may be switch selected to suit requirements at
the time of installation.
Table 1-1. Selection Considerations For Characteristic Curves
Style
Designation
Characteristic
Shape Special Characteristics
B1 Short Inverse Relatively short time, desirable where
preserving system stability is a critical
factor.
B2, E2 Long Inverse Provides protection for starting motors and
overloads of short duration.
B3 Definite Time Definite Time Fixed time delay according to
the time dial setting. Useful for sequential
tripping schemes.
B4, E4 Moderately Inverse Accommodates moderate load changes as
may occur on parallel lines where one line
may occasionally have to carry both loads.
B5, E5 Inverse Provide additional variations of the inverse
characteristic, thereby allowing flexibility in
meeting load variations, or in coordinating
with other relays.
B6. E6 Very Inverse
B7, E7 Extremely Inverse
If the supply to the protected portion of the system is constant, and if the magnitude of the fault current is
determined primarily by the location of the fault on the line, the selection of a more inverse time characteristic
is more desirable to provide selective coordination with adjacent line protection. However, if the capacity of
the supply varies significantly over a period (such as a day), a less inverse time or even the definite time
characteristic, may be preferred to provide smoother coordination.
LIMITED REGION OF OPERATION
A limited region-of-operation option is available to
provide additional protection against false tripping
on mutually coupled lines. Faults on adjacent lines
that share the same poles, towers or right-of-way
may induce currents on the protected line which
appear as fault currents in the tripping direction.
The limited region of operation mode provides
discrimination between faults on the protected line
and faults on the adjacent line. To order this option,
specify option 3-5 or 3-6.
One consideration in applying a phase directional
overcurrent relay is the definition of trip direction.
For most applications, the setting of the relay
directional element is based upon the impedance
characteristics of a given circuit. This angle is then
used as the maximum torque angle and any current
flowing in the half-plane defined by this angle is
considered to be in the trip direction.

BE1-67 General Information 1-3
Figure 1-3. Weak Infeed Phenomenon
Figure 1-4. Limiting the Region of Operation
Figure 1-2 illustrates the trip and non-trip directions.
However, there are at least two situations where the half-plane trip region is not adequate. They are when load
current approaches the fault current and when leading current flows in the non-trip direction above the relay
pickup setting.
Load Current Approaches Fault Current
Pickup settings on a phase overcurrent device are
normally set below the expected fault current
levels on that line by some margin. Consequently,
it is possible for load current to approach (or
exceed) the pickup setting on the relay. This could
lead to an undesirable trip for an acceptable load
condition.
Weak Infeed Condition
During a period of abnormally low system voltage,
leading power factor current above relay pickup
can flow in the non-trip direction of a line.
Probable current sources are outlying capacitor
banks. This could cause the current to be sensed
as lagging current flowing in the trip direction and
leading to an undesirable trip. (A condition often
referred to as
weak infeed because the lower
voltage system - where load is present - attempts
to correct the undervoltage condition on the higher
voltage system.) Refer to Figure 1-3.
Both of the previous conditions can be eased by
limiting the area of the trip region. Specifically, the
angle on each side of the torque angle vector can
be adjusted to be less than 90 degrees. This
limits the trip region area to only a portion of the
half-plane usually defined as the trip direction.
This limited region-of-operation characteristic
(shown in Figure 1-4) is available by specifying
option 3-5 or 3-6.

1-4 General Information BE1-67
APPLICATION
Without the ability to act on the direction of current flow, it is difficult to coordinate the settings of time
overcurrent relays on lines that interconnect a series of substations. Without this capability, either undesired
tripping of adjacent lines may occur. Or a fault may go undetected because of the high settings required by
non-directional relays.
With directional time overcurrent relays, the settings and time delays can be decreased and the undesired
tripping eliminated. Figure 1-5 illustrates the use of directional overcurrent relays on a group of interconnected
distribution substations fed from a common source. In this example, non-directional overcurrent relays (51)
are used to protect the lines leaving the supply bus because there is only one source of fault current. However,
the breakers at the load buses (C, D, E and F) are protected by directional time overcurrent relays (67) to
prevent overtripping in the event of a fault. This will remove the faulted line and retain service to the connected
loads.
In the case where two sources of power can supply fault current, as shown in Figure 1-6, directional
overcurrent relays will need to be applied to each end of the protected lines to prevent undesired tripping.
Figure 1-5. Substations Fed From One Source

BE1-67 General Information 1-5
Figure 1-7. Significant Faults for Breaker A
Figure 1-6. Substations Fed From Two Sources
SAMPLE APPLICATION CALCULATIONS
In this sample illustrated by Figure 1-7, a three-phase, 60 hertz, BE1-67 relay is used at breaker position A.
Assumed options for the relay include switch-selectable characteristic curves, switch-selectable characteristic
angle and a directional instantaneous output.

1-6 General Information BE1-67
Using this relay under the stated conditions, there are five settings to be established:
!Pickup of the timed element
!Time dial
!Timing characteristic
!Torque angle
!Pickup of the directional instantaneous unit
In arriving at a satisfactory setting for each variable, consideration must be given as to how the relay
coordinates with other upstream and downstream tripping devices. In particular, the time-current
characteristics of all relevant devices must be systematically considered for each fault condition that can
occur.
The ensuing analysis considers pickup settings first, followed by a detailed examination of the three scenarios
indicated in Figure 1-7 as faults L, M and N. These will be individually considered with regard to the five
settings listed previously and particularly the last four.
Pickup
When considering relay pickup, it is desirable to set the relay above the maximum load that the feeder is
expected to supply at any given time in the defined direction. Often this quantity is limited only by the breaker
size or the current carrying capacity of the line itself.
Returning to Figure 1-7, if it is assumed that the maximum lead current is 1,200 amperes for line AC and a
maximum CT ratio of 400:1, then:
Timed pickup setting = (1200)(1 ÷ 400)(1.25) = 3.75 amperes
(The 1.25 factor represents a margin of safety.)
Analysis Of Fault L
In Figure 1-7, assume the following fault L currents.
!IA(L) = 3,000 amperes at an angle of -65 degrees
!ID(L) = 6,400 amperes at an angle of -60 degrees
Based on these fault currents, the BE1-67 relay at A will pickup and begin to time out. But the primary concern
is that the relay at D trips before the one at A. This is accomplished by selecting the appropriate pickup, time
dial and characteristic for the 67 Adevice. Note in Figure 1-8, illustration a, that the 67Dcharacteristic curve
must be completely under the 67 Acurve for current greater than the 67Apickup point. A coordinating time
interval of0.2 to 0.5 seconds between the curves is usually recommended to accommodate breaker clearing
time plus a safety margin. The
Time Dial should be set to provide this coordination margin.
Usually, time-characteristic curves are chosen to coordinate with existing system devices. Consequently, if
67Dis extremely inverse, the 67Arelay might well be set to the B7 curve (extremely inverse). To select the
curve, use the rotary switch behind the front panel of the relay.
The fault current level seen by IA(3,000 amperes) also confirms that the setting chosen (3.75 A x 400 = 1,500
primary amperes) is sensitive enough to detect remote end faults. This is assuming that the fault current is
not limited by fault impedance.
Analysis Of Fault M
In Figure 1-7, assume the following fault M currents:
!IA(M) = 4,600 amperes at an angle of -60 degrees
!IE(M) = 400 amperes at an angle of -65 degrees

BE1-67 General Information 1-7
The 67Amust be coordinated with the upstream 67Edevice. Again, the primary concern is that the 67Arelay
trips before the 67Erelay. Accordingly, the time current characteristic curve for each relay must be selected
such that the 67Acurve is entirely under the 67Ecurve for currents above the 67Epickup, plus some margin.
(See Figure 1-8, illustration b.)
Be sure to check time dial settings to verify proper coordination. The fault current level seen by IAalso allows
the directional instantaneous unit to be set to trip for high current close-in faults.
Directional Instantaneous Setting = 4,600 (1 ÷ 400) (0.8 margin) = 9.2 amperes.
Figure 1-8. Coordination of Time Characteristic Curves
Since the impedance characteristic of the system is approximately 60 degrees (as defined by system R+jX),
the torque angle should be selected as 60 degrees for maximum sensitivity. A torque angle of 60 degrees will
also ensure that 67Bwill see fault N, but that 67Awill not. (The response of the BE1-67 Directional Unit is
approximately 1 cycle, thereby blocking the overcurrent unit before it will see the fault current in the reverse
direction.)

1-8 General Information BE1-67
Conclusions
Taking into consideration the requirements imposed by each of three possible fault conditions, the five
required settings for the relay at breaker A in this application are summarized in Table 1-2.
Table 1-2. Required Breaker Settings
Variable Suitable Setting
Pickup for timed element 3.75 A (low range, TAP 1)
Time dial As required for proper coordination margin
Timing characteristic B7 (rotary switch position 7)
Directional instantaneous element 9.20 A (potentiometer adjustment)
Torque angle 60° characteristic angle
MODEL AND STYLE NUMBER
Style Number Identification Chart
BE1-67 Phase Directional Overcurrent Relay electrical characteristics and operational features are defined
by a combination of letters and numbers that make up the style number. Refer to Figure 1-9 for the Style
Number Identification Chart. Model numbers BE1-67 designate the relay as a Basler Electric, Class 100,
Phase Directional Overcurrent Relay. The model number together with the style number describes the options
included in a specific device and appear on the front panel, drawout cradle and inside the case assembly.
Upon receipt of a relay, be sure to check the style number against the requisition and the packing list to ensure
that they agree.
Figure 1-9. Style Number Identification Chart

BE1-67 General Information 1-9
Style Number Example
Suppose, for example, it was decided that three-phase packaging of the directional overcurrent function (67)
would be best for an application. Then the first character of the style number would be B.
Suppose further that this is a 60 hertz power system and that the pickup setting for the time overcurrent func-
tion is to be 4.6 amperes. Then the second character of the style would then be 1. At this point it should be
noted on the installation instructions and drawings that the relay should be connected for the HIGH range and
that the front panel TAP RANGE plate should be adjusted so that the word HIGH shows.
If normally open output contacts are to be used for tripping the breaker, output option E is selected as the third
character.
If the required characteristic curve shape is not known prior to the installation of the protection package, timing
option Z2 could be specified. This allows the proper characteristic curve to be set in the field. (This also allows
a relay type to be stocked and used in other applications, thereby reducing stocking requirements.)
Continuing this hypothetical example, if a majority of the substations in the system have either 48 or 125 Vdc
station battery supplies, a type Y power supply option provides further standardization in the ordering and
stocking process.
The next style character is B if current operated targets are desired. These have an advantage over internally
operated targets because they confirm that a current signal flowed in the output circuit and resulted in a trip.
(However, as the style chart notes, current operated targets are only available when a normally open contact
is specified.) Internally operated targets only provide an indication that the associated contact attempted to
trip the breaker.
If a directional instantaneous overcurrent element is needed, the eighth character of the style number will then
be 3.
Will the breaker be periodically trip tested? If the normal procedure calls for the technician to close the relay
contacts, the push-to-energize output option (C) provides the convenience to do this.
If a fixed characteristic angle is preferred to a continuously adjustable angle and it is useful to have a contact
monitoring the power supply of the relay, option 3 should be a 4.
Finally, if relays are to be semi-flush mounted in the panel, the last style character is F. (These relays are
always supplied in an M1-size drawout case.)
Summarizing the above example of the selection process, the total style number for the specified relay is BE1-
67 B1E-Z1Y-B3C4F:
BE1-67 - Model number
B- Three-phase sensing
1- 0.5 to 12 A sensing range (60 Hz)
E- Normally open output contacts
Z1 - Switch selectable timing characteristics
Y- 48/125 Vdc Power supply
B- Current operated targets
3- Directional instantaneous overcurrent output
C- Push-to-Energize output feature
4- Switch selectable characteristic angle and power supply status output
F- Semi-flush case mounting, M1-size case
SPECIFICATIONS
BE1-67 Phase Directional Overcurrent Relays are available in either single-phase or three-phase
configurations with the following features and capabilities.

1-10 General Information BE1-67
Current Sensing Input(s)
The unit is designed to operate from the secondary of a standard current transformer rated at 5 amperes. The
unit has a pickup adjustment range covering 0.5 to 12 amperes. The maximum continuous current rating of
each input is 20 amperes.
The one-second current rating of each input is 50 times tap or 500 amperes, whichever is less. Ratings at less
than one second are calculated as follows:
where I = Maximum current
T = Time that current flows (in seconds)
Current Sensing Burden
Less than 0.01 ohm per input.
Time Overcurrent Pickup
Range
Pickup of the time overcurrent elements is continuously adjustable over theentire range of 0.5 to 12 amperes.
(See Table 1-3.) This is accomplished through the selection of external connections (LOW RANGE 0.5 to 4.0
amperes; HIGH RANGE 1.5 to 12 amperes), a TAP selector switch and TAP CAL adjustment.
A TAP RANGE plate is provided on the front panel to define the external connections and the range of
adjustment available when the unit is installed in the protection panel.
Table 1-3. Sensing Input Ranges And Connections
TAP Range
Plate or
Pickup
TAP Selector Current Sensing
Terminals
ABCD E F GH I J NANBNC
Single-Phase
High 2.25 3.00 4.50 5.25 6.75 7.50 9.00 9.75 11.2
5
12.0
0
8,7 ----- -----
Low 0.75 1.00 1.50 1.75 2.25 2.50 3.00 3.25 3.75 4.00 9,7 ----- -----
Three-Phase
High 2.25 3.00 4.50 5.25 6.75 7.50 9.00 9.75 11.2
5
12.0
0
8,7 14,15 17,18
Low 0.75 1.00 1.50 1.75 2.25 2.50 3.00 3.25 3.75 4.00 9,7 13,15 16,18
Pickup Accuracy
The accuracy of the pickup setting established by the TAP selector switch when the TAP CAL adjustment is
fully clockwise, is ±5%. The TAP CAL adjustment allows the relay to be set anywhere between the value
established by the TAP selector switch position and the next lower setting position.
The setting of the relay is repeatable within ±2%.
Dropout Ratio
Better than 95% of the established pickup level.

BE1-67 General Information 1-11
Figure 1-10. Typical Instantaneous Response Time
Timing Characteristics
The relay includes a choice of characteristics. A two-character designation within the style number defines
the timing characteristic. (See Table 1-4.)
Table 1-4. Characteristic Curves and Switch Positions
Switch Position
For Z2 Option
Characteristic
Curve Characteristic Description
Drawing
Number
3 B1 Short Inverse 99-0932
1 B2 Long Inverse 99-0931
5 B3 Definite 99-0933
2 B4 Moderately Inverse 99-0930
4 B5 Inverse 99-0929
6 B6 Very Inverse 99-0928
7 B7 Extremely Inverse 99-0927
8 E2 Long Inverse (BS 142) 99-1093
9 E4 Inverse (1.3 Sec.) (BS 142) 99-1094
A E5 Inverse (2.9 Sec.) (BS 142) 99-1095
B E6 Very Inverse (BS 142) 99-1096
C, D, E, F E7 Extremely Inverse (BS 142) 99-1097
Time Delay Accuracy
The time delay of the time overcurrent element is within ±5 percent or 50 milliseconds (whichever is greater)
of the characteristic curves for any combination of TIME DIAL, TAP and TAP CAL settings at 25°C.
Instantaneous Overcurrent
Pickup Range
Continuously adjustable over the range of one to 40 times the pickup setting established for the time
overcurrent element.
Response Time

1-12 General Information BE1-67
Figure 1-11. Characteristic Angle
Pickup Accuracy
The setting of the relay is repeatable within ±2 percent.
Dropout Ratio
The dropout ratio is better than 92 percent of the established pickup level.
Voltage Sensing Inputs
The continuous rating of these inputs are 240 Vac.
Voltage Sensing Burden
The voltage sensing burden is greater than 25 kilo-ohm at 120 Vac per input.
Directional Unit
The polarizing for the directional unit is derived by the phase relationship between the measured phase current
(A) and the sensed quadrature voltage (b-c). The directional element defines a region as shown in Figure 1-11
for which tripping will be allowed. The characteristic angle of the relay is defined as the angle between Izand
its ordinate, I. Note that Izis normal to the characteristic boundary. Resolution of direction requires less than
1 cycle.
Sensitivity
Proper directional decisions are assured when the current applied to the relay exceeds 25% of TAP value and
the voltage exceeds 1.0 Vac at the setting of the characteristic angle. When polarizing voltage is less than the
1.0 Vac threshold, relay operation will be inhibited.
Characteristic Angle
Adjustment
The BE1-67 is available with two types of adjustment for the characteristic angle.

BE1-67 General Information 1-13
(a) Continuously adjustable over the range of 0 to 90°
(b ) Switch selectable settings of 30°, 45°, 60° and 75°
Repeatability
Repeatability is ±5° from the setting at nominal system frequency.
Limited Range of Operation (Optional)
The front panel control is continuously adjustable over the range of +5°to +90°. The total individual angle of
the Limited Range of Operation will accordingly vary from 10° to 180°.
Frequency Range
The unit is designed to operate on power systems with a nominal frequency of either 50 or 60 hertz. The unit
has been type-tested for proper operation over the frequency range of 45 to 55 hertz for 50 hertz systems and
55 to 65 hertz for 60 hertz systems.
Power Supply
Power for the internal circuitry may be derived from a variety of ac or dc external power sources as indicated
in Table 1-5.
Table 1-5. Power Supply Specifications
Type
Nominal
Input
Voltage
Input
Voltage
Range
Burden
at
Nominal
K 48 Vdc 24 to 60 Vdc 7.0 W
J 125 Vdc
120 Vac
62 to 150 Vdc
90 to 132 Vac
10.0 W
20.0 VA
*L24 Vdc 12 to 32 Vdc 7.0 W
†Y 48 Vdc
125 Vdc
24 to 60 Vdc
62 to 150 Vdc
7.0 W
7.5 W
Z 250 Vdc
230 Vac
140 to 280 Vdc
190 to 270 Vac
8.5 W
22.0 VA
NOTES: All references are at 50/60 Hz.
*
Type L Power Supply may require 14 Vdc to begin operation. Once operating, the
voltage may be reduced to 12 Vdc.
†Type Y Power Supply is field-selectable for 48 or 125 Vdc. Selection must be implemented
at time of installation. This power supply option is factory set for 125 Vdc.
Target Indicators
Function targets may be specified as either internally operated or current operated by a minimum of 0.2
amperes through the output trip circuit. When current operated, the output circuit must be limited to 30
amperes for 0.2 seconds, 7 amperes for 2 minutes and 3 amperes continuously.
Single-Phase Units
When specified by the style number, either an internally operated or a current operated target will be supplied
for each of the tripping outputs included within the relay (i.e., the time and instantaneous overcurrent
functions).

1-14 General Information BE1-67
Three-Phase Units
When targets are specified by the style number, internally operated targets are included to indicate the phase
elements (A, B, C) involved in the tripping of the relay. Additionally, either internally operated or current
operated targets (as selected) indicate the function (time or instantaneous) that caused tripping.
Output Circuits
Output contacts are rated as follows:
Resistive
120/240 Vac Make 30 amperes for 0.2 seconds, carry 7 amperes continuously and break at 7
amperes.
250 Vdc Make and carry 30 amperes for 0.2 seconds, carry 7 amperes continuously and break
at 0.3 amperes.
500 Vdc Make and carry 15 amperes for 0.2 seconds, carry 7 amperes continuously and break
at 0.1 amperes.
Inductive
120/240 Vac, Make and carry 30 amperes for 0.2 seconds, carry 7 amperes continuously and
125/250 Vdc break at 0.3 amperes. (L/R = 0.04).
Isolation
In accordance with IEC 255-5 and ANSI/IEEE C37.90, one minute dielectric (high potential) tests as follows:
All circuits to ground: 2,121 Vdc
Input to output circuits: 1,500 Vac or 2,121 Vdc
UL Recognized
UL recognized per Standard 508, UL File No. E97033. Note: Output contacts are not UL recognized for
voltages greater than 250 volts.
Surge Withstand Capability
Qualified to ANSI/IEEE C37.90.1-1989, Standard Surge Withstand Capability (SWC) Tests for Protective
Relays and Relay Systems.
Operating Temperature
The operating temperature range is from -40°C (-40°F) to +70°C (+158°F).
Storage Temperature
The storage temperature range is from -65°C (-85°F) to +100°C (+212°F).
Shock
In standard tests, the relay has withstood 15 g in each of three mutually perpendicular planes without
structural damage or degradation of performance.
Vibration
In standard tests, the relay has withstood 2 g in each of three mutually perpendicular planes, swept over the
range of 10 to 500 Hz for a total of six sweeps, 15 minutes each sweep without structural damage or
degradation of performance.