Basler BE1-67N User manual

INSTRUCTION MANUAL
FOR
BE1-67N
GROUND DIRECTIONAL OVERCURRENT RELAY
Publication: 9 1907 00 990
Revision: B

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
installationoftheBE1-67NGroundDirectionalOvercurrentRelay. To
accomplish this, the following is provided.
Specifications
Functional description
Mounting information
Setting procedure/example.
A Service Manual, publication 9 1907 00 620, is available on special
order as an aid in troubleshooting and repair.
REV A B
ECA 12956 13351

ii
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: May 1992
Printed in USA
June 1993
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, BOX 269 HIGHLAND, IL 62249 USA
PHONE [phone] FAX [phone]

iii
CONTENTS
Section 1 GENERAL INFORMATION 1-1
Purpose ..........................................1-1
Applications .......................................1-1
Zero Sequence Current ...........................1-1
Zero Sequence Voltage ...........................1-1
Dual Sequence Current and Voltage .................1-1
Output Contacts ....................................1-3
Relay Status Alarm ...............................1-3
Tripping .......................................1-3
Auxiliary .......................................1-3
Push-To-Energize ...................................1-4
Targets ...........................................1-4
Power Supply Options ...............................1-4
Power-Up Delay ....................................1-4
Model and Style Number .............................1-4
Style Number Example ............................1-4
Style Number Identification Chart ....................1-5
Specifications ......................................1-5
Characteristic Curves ................................1-9
Section 2 CONTROLS and INDICATORS 2-1
Section 3 FUNCTIONAL DESCRIPTION 3-1
General ...........................................3-1
Functional Description ...............................3-1
Current Sensing .................................3-1
Voltage Sensing .................................3-2
Directional Unit ..................................3-2
Overcurrent Elements ............................3-5
Power Supply ...................................3-6
Output Contacts .................................3-6
Push-to-Energize Output Switches ...................3-7
Targets ........................................3-7
Section 4 INSTALLATION 4-1
General ...........................................4-1
Relay Operating Precautions ..........................4-1
Dielectric Test ......................................4-1
Mounting ..........................................4-1
Connections .......................................4-1
Sensing Input Connections (Two Winding Transformer) . . 4-2
Sensing Input Connections (Three Winding Transformer) . 4-3
Typical Output Connections ........................4-4
Typical Internal Connections .......................4-5
Operational Test Procedure (Sensing Input Ranges 1 and 2) . 4-6
Preliminary Test Setup ............................4-6

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CONTENTS - Continued
Section 4 INSTALLATION - Continued
Time Overcurrent Pickup Test ......................4-6
Instantaneous Overcurrent Pickup Test (Non-directional . . 4-7
Instantaneous Overcurrent Pickup Test (Directional) .....4-8
VODirectional Verification ..........................4-8
IODirectional Verification ..........................4-9
Operational Test Procedure (Sensing Input Ranges 3 and 4) 4-11
Preliminary Test Setup ...........................4-11
Time Overcurrent Pickup Test .....................4-11
Instantaneous Overcurrent Pickup Test (Non-directional . 4-12
Instantaneous Overcurrent Pickup Test (Directional) ....4-12
VODirectional Verification .........................4-13
IODirectional Verification .........................4-13
Timing Curve Verification ............................4-13
Timing Curve Verification (Sensing Input Ranges 1 and 2)4-13
Timing Curve Verification (Sensing Input Ranges 3 and 4)4-14
Blank Graph Forms .................................4-16
Outline Dimensions, Front View .......................4-17
Outline Dimensions, Rear View .......................4-18
Outline Dimensions, Side View - Semi-Flush Mounting .....4-19
Outline Dimensions, Side View - Projection Mounting ......4-20
Panel Drilling Diagram - Semi-Flush Mounting ............4-21
Panel Drilling Diagram - Projection Mounting .............4-22
Section 5 MAINTENANCE 5-1
General ...........................................5-1
In-House Repair ....................................5-1
Storage ...........................................5-1
Section 6 MANUAL CHANGE INFORMATION 6-1

1-1
SECTION 1
GENERAL INFORMATION
PURPOSE
BE1-67N Ground Directional Overcurrent Relays provide ground fault protection for transmission and
distribution lines by sensing the flow of ground (zero sequence) current into or out of protected zones. Zero
sequence quantities provide a secure reference for the directional element because these quantities are
defined by the total source impedance of the power system.
APPLICATION
BE1-67N Ground Directional Overcurrent Relays are recommended for multigrounded systems to provide
coordination necessary to selectively trip the faulted line. A directional overcurrent relay operates by
comparing the measured current to a reference quantity to determine whether current is flowing into or out
of the protected zone. Reference quantity is also referred to as polarizing quantity.
BE1-67N relays use one of the following quantities for polarization :
Zero sequence current
Zero sequence voltage
Dual zero sequence current and voltage
The polarizing quantity is field selectable using a switch mounted on the analog circuit board.
Zero Sequence Current
Zero sequence current polarization is preferred for applications with low ground source impedance. Refer
to Figure 1-1 for relay connections that obtain zero sequence current (3O) from a separate current
transformer in the grounded neutral of a two winding wye-delta power transformer. Refer to Figure 1-2 for
relayconnectionsthatobtainzero sequencecurrentfromacurrent transformer(s)inthe groundedneutral(s)
of a three winding transformer. The magnitude of the zero sequence current used for polarizing may be
different from that of the ground current seen by the measuring element(s) of the relay.
Zero Sequence Voltage
Zero sequence voltage polarization is preferred for higher ground source impedances. Refer to Figures 1-1
and 1-2 for relay connections that obtain zero sequence voltage (3VO) from a set of grounded wye-broken
delta voltage transformers. The voltage polarized relay has a directional polarization adjustment to match
the impedance angle of the protected line to the characteristic angle of the relay. This is the angle about
which the directional angle is centered. A choice of line angles allows the relay to be adjusted to include
the resistance component of the ground fault.
Dual Zero Sequence Current and Voltage
Dual polarization is preferred where ground source impedance varies, or to provide redundant polarization.
Dual polarization is achieved using a polarizing signal which is the phasor sum of the current and voltage
polarizing signals.

BE1-67N General Information
1-2
Figure 1-1. Zero Sequence Polarizing (Two Winding Transformer)

BE1-67N General Information
1-3
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OUTPUT CONTACTS
BE1-67N relays have the following output contacts: relay status alarm (relay fail), tripping, and auxiliary
(optional).
Relay Status Alarm
A relay status alarm output contact (relay fail) indicates that proper voltages are not being supplied to the
internal relay circuitry or that the microprocessor self-diagnostics has detected an error. This alarm output
contact is normally closed.
Tripping
Normally open or normally closed tripping contacts are included for each function within the relay.
Configuration of these contacts are defined by the relay style number. These output contacts are used with
optionally selected target indicator circuits.
Auxiliary
Normally open, normally closed, or single pole double throw (SPDT) auxiliary contact configurations are
provided to act in parallel with the tripping function(s) of the relay. Configuration of the auxiliary output
contacts are also defined by the relay style chart.

BE1-67N General Information
1-4
An auxiliary contact can be configured (via internal switches) to operate in parallel with any combination of
trippingoutputs. Configurable auxiliary outputs permit useof the BE1-67N relay invarious carrier schemes.
PUSH-TO-ENERGIZE
A push-to-energize pushbutton is included for each tripping output contact. These pushbuttons provide a
means of verifying the correct operation of external control circuit wiring without the need to supply test
signals to the relay. Control power must be applied for this function to operate. The pushbuttons are
recessed behind the relay front panel and are not accessible with the cover installed.
TARGETS
One target is included for each tripping function as specified by style number. Targets are operated either
by the internal signal initiating tripping (internally operated) or by a minimum of 0.2 amperes (dc) flowing
through the series circuit consisting of the target coil and output relay contacts (current operated). Within
a specific relay, all targets must be operated the same way.
POWER SUPPLY OPTIONS
Various power supply options are available to allow the BE1-67N relay to be used with standard supply
voltages. See the Style Chart for details.
POWER-UP DELAY
Apower-updelaytimerisinitiateduponapplicationof controlpowertotherelay topreventundesiredcontact
transitions when sensing signals are present. Operation of measuring circuits and output circuits are
inhibited (less than 0.5 seconds) until the power-up delay period has expired.
MODEL AND STYLE NUMBER
Electrical characteristics and operational features included in a specific relay are defined by a combination
of letters and numbers that makes up the style number. Refer to Figure 1-3 for the Style Number
Identification Chart. The style number together with the model number describe the features and options
in a particular device and appear on the front panel, drawout cradle, and inside the case assembly. Model
number BE1-67N designates the relay as a Basler Electric, Class 100, Ground Directional Overcurrent
Relay.
Style Number Example
Electrical characteristics and operational features in BE1-67N relays are identified by the style number. For
example, if the style number were A1E Z2J B4C0F the device would have the following features and
options.
BE1-67N Model Number
AZero sequence current, voltage, or dual polarized
10.25 to 6.0 A sensing range (60 Hz)
ENormally open output contacts
Z2 Switch selectable timing characteristics
JOperating power derived from 125 Vdc or 100/120 Vac
BCurrent operated targets
4Two instantaneous elements (directional and non-directional)
CPush-to-energize outputs (pushbuttons)
0No auxiliary output contacts
FSemi-flush mounting

BE1-67N General Information
1-5
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SPECIFICATIONS
Current Sensing (IOP)
Inputs Pickup adjustment range is:
0.25 - 6.0 amperes for sensing input ranges 1 and 2.
0.05 - 1.2 amperes for sensing input ranges 3 and 4.
Refer to Table 1-1 for maximum current carrying capacities.
Table 1-1. Maximum Current Capacities
Current Sensing Input Range
1 and 2 3 and 4
Continuous 7.5 amp 1.5 amp
5 min 20 amp 4 amp
1 sec 150 amp 30 amp