Basler BE1-79M User manual

INSTRUCTION MANUAL
FOR
MULTIPLE SHOT RECLOSING RELAY
BE1-79M
P0046-01
Publication: 9170100990
Revision: K 11/06

BE1-79M Introduction i
INTRODUCTION
This manual provides information concerning the operation and installation of the BE1-79M Multiple Shot
Reclosing Relay. To accomplish this, the following is provided.
•Specifications
•Functional description
•Mounting information
•Operational Test Procedure
WARNING!
To avoid personal injury or equipment damage, only qualified personnel should perform
the procedures presented in this manual.

ii BE1-79M Introduction
First Printing: January 1986
Printed in USA
© 1997, 1998, 2006 Basler Electric Co, Highland, IL 62249
November 2006
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.
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]

BE1-79M Introduction iii
REVISION HISTORY
Substantive changes in this manual to date are summarized below.
Revision Summary of Changes
A Manual revised to reflect software changes, which introduced an additional category
(Unsuccessful Reclosures) to the Reclose Event Memory.
B Page 3-3: Subsection entitled Instantaneous Trip Enable clarified.
C Page 3-2: Added footnote to Table 3-1.
Page 3-6: Added two paragraphs beginning with "Each reclose attempt..."
Page 3-7: Figure 3-2 corrected.
D Page 3-9: Subsection entitled Reclosing Event Memory rewritten
for clarification.
Pages 4-2 through 4-5: Operational test procedure revised.
Pages 5-2 through 5-4: Subsection entitled Test Plug Adapter added.
Added qualifications to specifications listing, revised isolation test and dielectric test.
E Operational test procedure revised.
Pages 5-5 and 5-6 added.
Section 6 added.
F Manual revision to support the following relay changes.
•Six additional control output options
•Two additional reclose time delay options
•Y-type power supply option
•Reset timer 1-100 second time delay option
•Four additional special contact assignment options
•A four function field selectable logic switch
•Moved sensing input power module from outside the case to inside the case
Added Section 7, Difference Data to support BE1-79M Relay revision D and previous.
G Changed Style Number Identification Chart first character from A to B in response to ECA
12237, changed operational Test Procedure, Section 4 to improve procedures and
correct typographical error, and added old Style Number Identification Chart to Section 7.
H Changed Introduction to include Service Manual, Publication 9 1701 00 623, and added
new Figures 4-3 and 4-9.
I/01-97 Corrected Figure 1-1 by adding 7, 8 to note #2.
Changed Specifications to reflect the updates in the Outputs, RFI, and Surge Withstand
Capability.
Clarified first paragraph on page 3-3.
Changed “INST” to “2ND TIME DELAY” in Figure 3-7.
Added disconnects to 20 and 11 in Figure 4-3.
Revised Section 5, paragraph 1 to include both Service Manual numbers.
Also corrected an error on page 5-2.

iv BE1-79M Introduction
Revision Summary of Changes
J/06-98 Deleted reference to Service Manuals.
Replaced Power Supply paragraph on page 3-6 starting with "Basler Electric enhanced
the power supply...”
Deleted Figure 3-4 and added Table 3-3.
Corrected the Figure numbering following Figure 3-4.
Changed the burden data for new power supply in Table 1-2.
Separated Section 4 into two sections. Now Section 5 is TESTS AND ADJUSTMENTS.
Revised all numbers referring to figures, tables, and sections involved in this change.
Added new dimension figures to include all options available (S1 Double-Ended and both
mounting positions).
Also added case ground to Figure 4-9.
Changed the format of the manual.
K/11-06 Added Notes 1 and 4 to style chart in Section 1.

BE1-79M Introduction v
CONTENTS
SECTION 1 INFORMATION.......................................................................................................... 1-1
Purpose.....................................................................................................................1-1
Application ................................................................................................................1-1
Model and Style Number..........................................................................................1-2
Style Number Example......................................................................................1-2
Style Number Change.......................................................................................1-2
Compatibility.......................................................................................................1-2
Style Number Identification Chart......................................................................1-3
Specifications............................................................................................................1-4
SECTION 2 HUMAN-MACHINE INTERFACE............................................................................. 2-1
SECTION 3 FUNCTIONAL DESCRIPTION ................................................................................. 3-1
General .....................................................................................................................3-1
Functional Description..............................................................................................3-1
Contact Sensing.................................................................................................3-1
Contact Interface................................................................................................3-3
Logic Switch.......................................................................................................3-3
Thumbwheels.....................................................................................................3-4
Instantaneous Trip Enable (Optional) ...............................................................3-4
Microprocessor ..................................................................................................3-4
Program Monitor................................................................................................3-4
Power Loss Detector.........................................................................................3-4
Outputs...............................................................................................................3-5
Power Supply.....................................................................................................3-5
Operational Characteristics......................................................................................3-6
Power-up............................................................................................................3-6
Reset.........................................................................................................................3-7
Lockout......................................................................................................................3-7
Reclosing Sequences........................................................................................3-8
Reclose Fail .......................................................................................................3-8
Maximum Cycle .................................................................................................3-8
Block Load Tap Changer...................................................................................3-8
Control Outputs and Special Contact Assignments ...................................... 3-11
Reclosing Event Memory ...................................................................................... 3-11
Purpose........................................................................................................... 3-11
Data Retrieval................................................................................................. 3-12
Data Retention................................................................................................ 3-12
Clearing Stored Data...................................................................................... 3-13
SECTION 4 INSTALLATION.........................................................................................................4-1
General .....................................................................................................................4-1
Relay Operating Precautions...................................................................................4-1
Dielectric Test...........................................................................................................4-1
Mounting...................................................................................................................4-1
Connections..............................................................................................................4-1
SECTION 5 TESTS AND ADJUSTMENTS ................................................................................5-1
General .....................................................................................................................5-1
Required Test Equipment.........................................................................................5-1
Operational Test Procedure.....................................................................................5-1

vi BE1-79M Introduction
CONTENTS - Continued
SECTION 5 TESTS AND ADJUSTMENTS (CONTINUED)
Reclosing Event Memory (REM).............................................................................5-5
Data Retrieval....................................................................................................5-5
Data Retention...................................................................................................5-6
Clearing Stored Data.........................................................................................5-6
SECTION 6 MAINTENANCE......................................................................................................... 6-1
General.....................................................................................................................6-1
In-House Repair.......................................................................................................6-1
Storage.....................................................................................................................6-1
Test Plug...................................................................................................................6-1
BE1-79M Test Set....................................................................................................6-2
General..............................................................................................................6-2
SYNC Switch.....................................................................................................6-2
52a Lamp (Red).................................................................................................6-2
52b Lamp (Green).............................................................................................6-2
BE1-79M Test Set....................................................................................................6-3
SECTION 7 DIFFERENCE DATA................................................................................................. 7-1
General.....................................................................................................................7-1
Differences ...............................................................................................................7-1
Compatibility.............................................................................................................7-1
Connections..............................................................................................................7-1
Style Number Identification Chart............................................................................7-2
Test Plug Adapter.....................................................................................................7-3
Function.............................................................................................................7-3
Assembling Adapter to Test Plug .....................................................................7-4

BE1-79M General Information 1-1
SECTION 1 • GENERAL INFORMATION
PURPOSE
The BE1-79M Multiple Shot Reclosing Relay automatically recloses circuit breakers, which have been
tripped by protective relays or other devices in power transmission and distribution systems.
•Over 90% of faults occurring on overhead lines may be cleared by momentarily de-energizing the
line. Once the circuit breaker has been opened to de-energize the line, the BE1-79M provides a
reliable automatic reclosure. The advantages are:
•Improved Service Continuity - returns the line to service quickly, preserving line integrity and
minimizing outage effects on critical loads.
•System Stability - prevents disjointing of the system grid.
•Higher Line Loading - decreases likelihood of loss of line.
APPLICATION
Four major factors should be considered when establishing a reclosing philosophy.
•Desired number of reclosure attempts.
•Time delay between breaker opening and reclosure.
•Supervisory control.
•System coordination.
The first major factor is the desired number of reclosure attempts. Where most faults are attributable to
heavy tree exposure, as in distribution networks, multiple reclosure attempts are common. This is
possible because of low voltage levels and is desirable considering customer inconvenience during
outages. The BE1-79M is programmable for up to four reclosure attempts per sequence. This allows
tailoring of the reclosing sequence to the specific needs of the circuit.
The second major factor is the time delay between breaker opening and reclosure. On subtransmission
and distribution networks, it is necessary to ensure that motors are no longer running and that local
generation is off-line prior to attempting reclosure. At the same time, a rapid reclosure minimizes damage,
ionization, and system shock in transmission networks. After the first reclosure attempt, additional
attempts are generally delayed to allow for de-ionization of the interrupter. The BE1-79M incorporates
one instantaneous reclosing attempt with bypass capability, and up to three individually adjustable, time-
delayed, reclosing attempts.
A third major factor to be considered in reclosing is supervisory control. Supervisory control allows the
operator to maintain control of the system at all times. The BE1-79M has inputs available to bypass the
instantaneous reclose attempt and to drive the relay to LOCKOUT inhibiting relay operation at any time.
In addition, a separate input is available which may be used to initiate a pilot reclosing sequence.
The fourth major factor is system coordination. The BE1-79M has outputs available which may be used to
block or enable instantaneous tripping of the circuit breaker and block a transformer's automatic load tap
changer operation during a reclosing sequence.

1-2 BE1-79M General Information
MODEL AND STYLE NUMBER
The electrical characteristics and operational features included in a specific relay are defined by a
combination of letters and numbers, which constitutes the device's style number. 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. The model number BE1-79M designates
the relay as a Basler Electric, Class 100, Multiple Shot Reclosing Relay.
Style Number Example
The following style number identification chart illustrates the features and options for BE1-79M relays. For
example, if the style number were BE1-79M B6A A6J C0L0F, the device would have the following
features:
BE1-79M Model Number
BMultiple shot
6Lockout and reset with reclose fail and maximum cycle
AInstantaneous trip enable
A6Reclose time delay adjustable from 0.1 to 99.9 seconds
JOperating power derived from 125 Vdc or 120 Vac source
CReset time delay adjustable from 10 to 1000 seconds
0Standard contact assignment
LNon-isolated contact sensing
0No option 3 available
FSemi-flush mounting
Style Number Change
Effective November 18, 1991 (serial number 2812 and subsequent), the BE1-79M Multiple Shot
Reclosing Relay, style number identification for multiple shot is changed from A to B. This style number
change was made to differentiate relays with sensing input power module on the outside of the case
(style number A) and relays with the sensing input power module inside the case (style number B).
Section 7 of this manual provides difference data for style number A relays.
Compatibility
Relays with style number B are backwards compatible. That is, they may be used in place of relays with
style number A. The only exception is for a relay with a type Z power supply (250 Vdc/230 Vac) and
isolated sensing. For details, see section 7 of this manual.
Relays with style number A are NOT forward compatible. They may NOT be used in place of relays with
style number B.

BE1-79M General Information 1-3
Figure 1-1. Style Number Identification Chart

1-4 BE1-79M General Information
SPECIFICATIONS
The BE1-79M Relay is available with the following features and capabilities.
Contact Sensing
Reclose Initiate
Breaker (52b)
Pilot Initiate
Instantaneous Reclose
Bypass
Drive to Lockout
The contact sensing circuits require user-supplied contacts with a
minimum rating of 0.025 A at 250 Vdc. Sensing current is supplied by
the relay in styles with isolated sensing. Styles with non-isolated
sensing require an applied sensing voltage equal to the relay dc power
supply input rating. Burden per contact for non-isolated sensing,
dependent on power supply type, is listed in Table 1-1.
Power Supply Refer to Table 1-2.
Outputs Output contacts are rated as follows:
Resistive
120 Vac Make, break, and carry 7 Aac continuously.
250 Vdc Make and carry 30 Adc for 0.2 seconds, carry 7 Adc
continuously, break 0.3 Adc.
500 Vdc Make and carry 15 Adc for 0.2 seconds, carry 7 Adc
continuously, break 0.3 Adc.
Inductive
120 Vac, 125 Vdc, 250 Vdc Break 0.3 A (L/R = 0.04)
Timing
Reclose
Pilot (Optional)
Adjustable from 00.1 to 99.9 seconds in 0.1 second increments.
Accurate within 1% of setting or 0.05 seconds, whichever is greater.
Optionally adjustable from 1 to 999 seconds in one second increments
for the second and third reclose time delays. Accurate within 1% of
setting or 0.5 seconds, whichever is greater.
Optionally adjustable from 0.03 to 0.99 seconds in 0.01 increments.
Accurate to within 0.005 seconds of setting. If reclose time delay option
A8 is not specified, pilot reclose time is less than 0.030 seconds.
Reset Adjustable from 10 to 1,000 seconds in 10-second increments or
optionally adjustable from 1 to 100 seconds in 1 second increments. A
setting of 00 indicates a 1000 second reset time or optionally a 100
second reset time. Accurate within 1% of setting or 0.5 seconds,
whichever is greater.
Reclose Fail (Optional) Adjustable from 0.1 to 9.9 seconds in 0.1 second increments. Accurate
within 1% of setting or 0.05 seconds, whichever is greater.
Maximum Cycle (Optional) Adjustable from 1 to 1000 seconds in 1 second increments. Accurate
within 1% of setting or 0.5 seconds, whichever is greater.

BE1-79M General Information 1-5
Temperature
Operating -40°C (-40°F) to 70°C (158°F)
Storage -65°C (-85°F) to 100°C (212°F)
Radio Frequency
Interference (RFI) Maintains proper operation when tested for interference in accordance
with IECC C37.90.2-1989, Trial-Use Standard Withstand Capability of
Relay Systems to Radiated Electromagnetic Interference from
Transceivers, and 99-1188, field tested using a 5 watt, hand held
transceiver operating at random frequencies centered around 144 MHz
and 440 MHz, with the antenna located 6 inches from the relay in both
horizontal and vertical planes.
Shock In standard tests, the relay has withstood 15g in each of three mutually
perpendicular planes without structural damage or degradation of
performance.
Vibration In standard tests the relay has withstood 2g in each of three mutually
perpendicular planes swept over the range of 10 to 500 Hz for six
sweeps, 15 minutes each sweep, without structural damage or
degradation of performance.
Isolation At terminals 1 through 4 and 11 through 20, the maximum voltage
applied must be no greater than 300 V because of the MOV
suppressors employed at these locations. At the remaining terminals,
2,500 Vac at 60 Hz for one minute may be applied in accordance with
IEC 255-5 and ANSI/IEEE C37.90-1989 (Dielectric Test).
Surge Withstand Capability
Oscillatory
Fast Transient
Qualified to ANSI/IEEE C37.90.1-1989 Standard Surge Withstand
Capability (SWC) Tests for Protective Relays and Relay Systems.
Qualified to ANSI/IEEE C37.90.1-1989 Standard Surge Withstand
Capability (SWC) Tests for Protective Relays and Relay Systems.
Impulse Test Qualified to IEC 255-5.
GOST-R Certification
GOST-R certified No. POCC US.ME05.B03391; complies with the
relevant standards of Gosstandart of Russia. Issued by accredited
certification body POCC RU.0001.11ME05.
Weight 13 pounds
Case Size S1

1-6 BE1-79M General Information
Table 1-1. Burden (Nominal) Per Non-isolated Sensing Contact
Power Supply Type K J L Z
Nominal Burden Per Input 0.75 W 1.60 W 0.70W 2.20 W
NOTE: For type Y Power supply, use burden for type K or type J power supply depending on nominal
operating voltage.
Table 1-2. Power Supplies
Type Nominal Input
Voltage Input Voltage Range Burden at Nominal (Maximum)
K (Mid Range) 48 Vdc 24 to 150 Vdc 5.4 W
J (Mid Range) 125 Vdc
120 Vac 24 to 150 Vdc 90 to 132 Vac 5.3 W 13.2 VA
L(Low Range) ∗24 Vdc 12 to 32 Vdc 5.3 W
Y (Mid Range) 48 Vdc
125 Vdc 24 to 150 Vdc 24 to 150 Vdc 5.4 W 5.3 W
Z (High Range) 250 Vdc
240 Vac 62 to 280 Vdc 90 to 270 Vac 5.4 W 14.1 VA
∗Type L power supply may initially require 14 Vdc to begin operating. Once operating, the voltage may
be reduced to 12 Vdc and operation will continue.

BE1-79M Human-Machine Interface 2-1
SECTION 2 • HUMAN-MACHINE INTERFACE
CONTROLS AND INDICATORS
Figure 2-1 illustrates the location of controls and indicators on the front panel. Table 2-1 explains the call-
outs shown in Figure 2-1. Table 2-2 lists the functions enabled per logic switch (S23) position.
P0046-02
Figure 2-1. Location of Controls and Indicators

2-2 BE1-79M Human-Machine Interface
Table 2-1. BE1-79M Controls and Indicators (Refer to Figure 2-1)
Locator Control or Indicator Function
ARECLOSE TIME
Controls (1, 2, 3) Establish reclose time delays for corresponding time-
delayed reclosure attempts. Individually thumbwheel
adjustable from 00.1 to 99.9 seconds in 00.1 second
increments or if reclose time delay option is A7, second and
third RECLOSE TIME thumbwheels are adjustable from
001 to 999 seconds in one second increments. A setting of
000 on a RECLOSE TIME thumbwheel indicates the
reclosing attempt is not desired and sends the relay to
lockout at this point in the reclosing sequence.
BRESET Control Establishes automatic reset interval. Thumbwheel
adjustable from 10 to 1000 seconds in 10 second
increments. Optionally adjustable from 1 to 100 seconds in
1 second increments. A setting of 00 indicates a reset time
of 1000 seconds or optionally, 100 seconds.
CRESET Switch Momentary toggle switch, which extinguishes STATUS
LEDs (except LOCKOUT). Accessible by linkage, which
extends through bottom of front cover.
DRESET LED ON when relay is in RESET.
EPILOT or RESET INHIBIT
LED (Optional)
With PILOT option, LED is ON when pilot output relay coil
is energized. Remains ON until activation of manual
RESET lever, power loss, or when relay reaches RESET if
STATUS LED reset is optionally selected by logic switch
S23. With RESET INHIBIT option, LED is ON when reset
inhibit input is closed.
FPOWER LED ON when the power supply is delivering a nominal ±12 Vdc
to internal circuitry.
GOUTPUT ENERGIZE LED ON when reclose output relay coil is energized.
HRELAY FAIL LED ON when relay is not operable. Also ON during power-up
sequence.
ISTATUS LEDs (INST., 1, 2,
3)
(LOCKOUT)
Latched ON to indicate progression of reclosing sequence.
Extinguished by RESET lever, power loss, or when relay
reaches RESET if STATUS LED reset is optionally selected
by logic switch S23.
ON when relay is in LOCKOUT. (Non-latching.)
JINSTANTANEOUS TRIP
(Optional) Five toggle switches, which enable or block instantaneous
tripping of circuit breaker. Numbers correspond to the relay
state or a specific trip depending on the type of reclosing
sequence in progress.
KRECLOSE FAIL LED
(Optional) ON when circuit breaker 52b contact does not open within
selected time after reclose output has been energized.
LRECLOSE FAIL Control
(Optional) Limits duration of reclose command signal. Thumbwheel
adjustable from 0.1 to 9.9 seconds in 0.1 second
increments. For a setting of 00, the reclose command
signal is continuous until the breaker closes.
MMAX. CYCLE LED
(Optional) ON when maximum cycle limit, as established by the MAX.
CYCLE control, has been exceeded.

BE1-79M Human-Machine Interface 2-3
Locator Control or Indicator Function
NMAX. CYCLE or PILOT TIME
Control (Optional) With MAX. CYCLE, establishes maximum cycle limit
(maximum allowable interval from initiation of reclosing
sequence until RESET or LOCKOUT). Thumbwheel
adjustable from 1 to 1000 seconds in 1 second increments.
A setting of 000 allows a 1000-second maximum cycle.
With reclose time delay option A8 (PILOT TIME), the two
least significant digits are used for the pilot time delay for a
pilot reclose attempt. Thumbwheel adjustable from 0.03 to
0.99 seconds. A setting of .00, .01, and .02 is equivalent to
.03 setting.
ONORMAL/TEST Switch Provides selection of relay operating mode.
PLogic Switch Field selectable, 16 position switch (S23) enables
combinations of the following functions.
•Memory save
•Power-up to reclose
•Recognition dropout
•Status LED reset
Refer to Table 2-2 for switch positions and functions
enabled. To be enabled, function changes require relay
power removal and power-up after setting switch position.
CAUTION
With Power-up to Reclose enabled, relay will close the breaker during power-up if relay was
in RESET when powered-down and Pilot Initiate or Reclose Initiate is present during power-
up.
Table 2-2. Logic Switch (S23) Positions and Functions Enabled
Position Functions Enabled
0∗∗
1 RD
2 SL
3 SL RD
4
PR∗
5
PR∗RD
6
PR∗SL
7
PR∗SL RD
8 MS
9 MS RD
A MS SL
B MS SL RD

2-4 BE1-79M Human-Machine Interface
Position Functions Enabled
C MS
PR∗
D MS
PR∗RD
E MS
PR∗SL
F MS
PR∗SL RD
NOTES:
∗∗ Default position from factory
RD = Recognition Dropout
SL = Status LED Reset
PR∗= Power-up to Reclose (Refer to Caution preceding Table 2-2)
MS = Memory Save

BE1-79M Functional Description 3-1
SECTION 3 • FUNCTIONAL DESCRIPTION
GENERAL
The BE1-79M Multiple Shot Reclosing Relay is a microprocessor-based device, which responds to the
state of external contacts. In responding, the Relay provides automatic reclosure once the circuit breaker
has opened to de-energize the line. Refer to Section 1 for major factors to consider when establishing a
reclosing philosophy.
FUNCTIONAL DESCRIPTION
The following paragraphs describe the Relay circuit functions illustrated in Figure 3-1.
Contact Sensing
Depending on style, contact-sensing current is obtained either directly from the Multiple Shot Reclosing
Relay or from any power source with a voltage rating the same as the Relay power supply dc input
voltage. When the Relay provides the contact sensing current, isolated contact sensing is employed.
When another power source provides the contact sensing current, non-isolated contact sensing is
employed. Relays with a Y type wide range power supply have a field selectable link (J2) on the contact
sensing board to match the nominal power supply input voltage of 48 Vdc or 125 Vdc. Selection must be
done at the time of installation and prior to application of power. This option is factory set for 125 Vdc.
Figure 3-2 shows the link set to the 125 Vdc position.
Table 3-1. Function of Sensing Contacts
Contacts Designation Function
Pilot Initiate
(Optional)
(Note Δ1) PI Form A contact which, when closed, initiates a pilot reclosing
(Optional) sequence. This contact is also required during the
sequence to initiate each reclose attempt.∗
Breaker 52b
Form B auxiliary contact of the controlled breaker utilized to
determine the state of the breaker.
Reclose Initiate
(Note Δ2) RI
Form A contact which, when closed, initiates a normal reclosing
sequence. This contact is also required during the sequence to
initiate the individual time delays and subsequent reclose output
closures.*
Instantaneous
Reclose Bypass IRB Form A contact which, when closed, cause the instantaneous reclosure attempt to be bypassed.
Drive to Lockout DTL Form A contact which, when closed, instantaneously drives the
Multiple Shot Reclosing Relay into lockout.
NOTES:
∗If the appropriate initiate contact (RI or PI) is not received within the corresponding period, the relay
is forced to the lockout state.
Δ1. Input is Reset Inhibit (RES INH) if option 1 is 1.
Δ2. Input is Reclose Wait (REC WAIT) if option 1 is 2. Input is Reclose Permissive (RP) if option 1 is 4.

3-2 BE1-79M Functional Description
RECLOSE RECLOSE FAIL PILOT/ TRIP INSTANTANEOUS ENABLE
TAP LOAD BLOCK CHANGER LOCKOUT FAIL RELAY
BUFFER
DRIVER
RELAY
FAIL
INST. 123
LOCKOUT
MAX RECLOSE OUTPUT PILOT/ RESET
CYCLE FAIL ENERGIZE
LED INDICATORS
PROGRAM
MONITOR
REGULATOR
VOLTAGEPOWER
SUPPLY
POWER
POWER
LOSS
DETECTOR
RECOGNITION DROPOUT STATUS LED RESET MEMORY
SEQUENCE
RECLOSE
MICROPROCESSOR
ENABLE
TRIP
INST.
MEMORY SAVE POWER UP TO RECLOSE
RESET
MAX
THUMBWHEELS
CYCLE/ FAIL
RECLOSE RECLOSE
123
B U
F F
E R
C O N T A C T I N T E R F A C E
RECLOSE
INITIATE
(RI)
BREAKER
(52B)
PILOT
INITIATE
(PI)
INST
RECLOSE
BYPASS
(IRB)
DRIVE
TO
LOCKOUT
(DTL)
10-21-91
D714-006
BE1-79M
LOGIC SWITCH
RESET
INHIBIT
PILOT
TIME
INPUT IS RESET INHIBIT (RES INH) IF OPTION 1 IS 1. INPUT IS RECLOSE WAIT (REC WAIT) IF OPTION 1 IS 2. INPUT IS RECLOSE PERMISSIVE (RP) IF OPTION 1 IS 4.
321
1
23
PRE-LOCKOUT
Figure 3-1. Functional Block Diagram