Sel SEL-734B User manual

20170207
SEL-734B
Capacitor Bank Control
Field Reference Guide
*PM734B-03*

SEL-734B Capacitor Bank Control Field Reference Guide Date Code 20170207
© 2015–2017 by Schweitzer Engineering Laboratories, Inc. All rights reserved.
All brand or product names appearing in this document are the trademark or registered trademark of their respective holders. No SEL
trademarks may be used without written permission. SEL products appearing in this document may be covered by U.S. and Foreign patents.
Schweitzer Engineering Laboratories, Inc. reserves all rights and benefits afforded under federal and international copyright and patent laws in
its products, including without limitation software, firmware, and documentation.
The information in this document is provided for informational use only and is subject to change without notice. Schweitzer Engineering
Laboratories, Inc. has approved only the English language document.
This product is covered by the standard SEL 10-year warranty. For warranty details, visit selinc.com or contact your customer service
representative. PM734B-03

Date Code 20170207 Field Reference Guide SEL-734B Capacitor Bank Control
Table of Contents
R.Field R eference Gu ide
List of Tables .......................................................................................................................................................iii
List of Figures......................................................................................................................................................v
Preface..................................................................................................................................................................vii
Section 1: Overview
Introduction ..................................................................................................................................................... 1.1
SEL-734B Front Panel ....................................................................................................................................1.2
SEL-734B Rear Panel...................................................................................................................................... 1.3
Enclosure Front ............................................................................................................................................... 1.4
Section 2: Field Connections to the Enclosures
Overview .........................................................................................................................................................2.1
Connections to Full-Size Enclosures............................................................................................................... 2.1
Connections to Compact Enclosures...............................................................................................................2.7
Section 3: Installing the Enclosure
Overview .........................................................................................................................................................3.1
Grounding the Enclosure................................................................................................................................. 3.1
Pole-Mounting the Full-Size and Compact 7-Pin Enclosures.........................................................................3.2
Connecting Full-Size Enclosures to a Control Power Transformer and Switches..........................................3.5
Connecting Full-Size Enclosures to the Sensors.............................................................................................3.5
Mounting Socket-Based Enclosures................................................................................................................3.6
Connecting Socket-Based Enclosures to a Control Power Transformer and Switches................................... 3.6
Section 4: Configuring the SEL-734B
Overview .........................................................................................................................................................4.1
Record the Part Number and Serial Number of the Device ............................................................................4.1
Establish SEL Communication Between PC and the SEL-734B....................................................................4.1
Change Passwords........................................................................................................................................... 4.4
Section 5: Working With the SEL-734B Design Template Settings
Overview .........................................................................................................................................................5.1
Enclosure Model Features...............................................................................................................................5.1
Read Settings From the SEL-734B .................................................................................................................5.2
Save Configuration Settings to the PC Hard Drive .........................................................................................5.2
Settings Window.............................................................................................................................................. 5.3
Section 6: Commissioning
Overview .........................................................................................................................................................6.1
Front-Panel Menu Structure ............................................................................................................................ 6.1
Verify the Measurements................................................................................................................................. 6.2
Close and Open the Capacitor Bank From the Front Panel.............................................................................6.3
View the Sequential Events Recorder .............................................................................................................6.3
Validate SER.................................................................................................................................................... 6.4
Troubleshooting and Common Problems........................................................................................................6.5
Appendix A: Field Reference Guide Versions
Appendix B: Compact Socket-Based Enclosure Revisions

ii
SEL-734B Capacitor Bank Control Field Reference Guide Date Code 20170207
Appendix C: Installation Examples
Full-Size Enclosures With the Combined Sensor Connector .........................................................................C.1
Full-Size Enclosures With Individual Sensor Connectors..............................................................................C.5
Compact 7-Pin Connectorized Enclosures .....................................................................................................C.7
Compact Socket-Based Enclosures.................................................................................................................C.8
Appendix D: Cable Drawings
Control Cables for Full-Size Enclosures With the Combined Sensor Connector...........................................D.1
Sensor Cables for Full-Size Enclosures With the Combined Sensor Connector............................................D.5
Power Supply/Neutral Sensor Cables for Full-Size Enclosures With Individual Sensor Connectors............D.8
Control Cables for Full-Size Enclosures With Individual Sensor Connectors...............................................D.9
Sensor Cables for Full-Size Enclosures With Individual Sensor Connectors...............................................D.11
Control and Sensor Cable for Compact 7-Pin Connectorized Enclosures....................................................D.12
Appendix E: Compact Enclosure Drawings
Compact 4-Jaw Socket-Based Enclosure........................................................................................................ E.2
Compact 6-Jaw Option A Socket-Based Enclosure........................................................................................ E.4
Compact 6-Jaw Option B Socket-Based Enclosure........................................................................................ E.6
Compact 7-Pin Connectorized Enclosure....................................................................................................... E.8
Appendix F: Accessories
Compact Enclosure Accessories......................................................................................................................F.1
Full-Size Enclosure Accessories......................................................................................................................F.1

Date Code 20170207 Field Reference Guide SEL-734B Capacitor Bank Control
List of Tables
R.Field R eference Gu ide
Table 2.1 Pinout of Control Connector for Full-Size Enclosures With the Combined Sensor
Connector.............................................................................................................................. 2.2
Table 2.2 Control Cables for Full-Size Enclosures With the Combined Sensor Connector.................. 2.3
Table 2.3 Pinout of Combined Sensor Connector for Full-Size Enclosures.......................................... 2.3
Table 2.4 Sensor Cables for Full-Size Enclosures With the Combined Sensor Connector................... 2.4
Table 2.5 Pinout of Individual Sensor Connectors J3, J4, and J5..........................................................2.5
Table 2.6 Pinout of Control Connector J1 for Full-Size Enclosures With Individual Sensor
Connectors ............................................................................................................................ 2.5
Table 2.7 Pinout of Power Supply/Neutral Connector J2 for Full-Size Enclosures With Individual
Sensor Connectors................................................................................................................. 2.6
Table 2.8 Power Supply/Neutral Sensor Control Cables for Full-Size Enclosures With Individual
Sensor Connectors................................................................................................................. 2.6
Table 2.9 Control Cables for Full-Size Enclosures With Individual Sensor Connectors.......................2.7
Table 2.10 Sensor Cables for Full-Size Enclosures With Individual Sensor Connectors........................ 2.7
Table 2.11 Socket Stab Configurations....................................................................................................2.8
Table 2.12 Pinout of 7-Pin Connectorized Enclosure..............................................................................2.9
Table 2.13 Control and Sensor Cable for the 7-Pin Connectorized Enclosure........................................ 2.9
Table 4.1 Default Passwords and Access Levels....................................................................................4.2
Table 5.1 Control Features of Enclosure Models................................................................................... 5.1
Table 6.1 Front-Panel Menu Structure................................................................................................... 6.1
Table A.1 Revision History.................................................................................................................... A.1
Table B.1 Compact Socket-Based Enclosure Revision History .............................................................B.1

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Date Code 20170207 Field Reference Guide SEL-734B Capacitor Bank Control
List of Figures
R.Field R eference Gu ide
Figure 1.1 SEL-734B Model Options in Outdoor-Rated Enclosures......................................................1.1
Figure 1.2 SEL-734B Front Panel ........................................................................................................... 1.2
Figure 1.3 Top Label and Rear Panel ......................................................................................................1.3
Figure 2.1 Bottom View of Enclosure With Combined Sensor Connector.............................................2.1
Figure 2.2 Bottom View of Enclosure With Individual Sensor Connectors............................................ 2.5
Figure 2.3 4- and 6-Jaw Socket Stabs...................................................................................................... 2.8
Figure 2.4 Bottom View of Connectorized Compact Enclosure ............................................................. 2.8
Figure 3.1 SEL-734B Required System Grounding................................................................................3.2
Figure 3.2 Full-Size Enclosure Mounting Dimensions ...........................................................................3.3
Figure 3.3 Compact 7-Pin Enclosure Mounting Dimensions..................................................................3.4
Figure 3.4 Meter Locking Ring for Socket-Based Enclosure..................................................................3.6
Figure 4.1 Default Serial Communication Parameters............................................................................ 4.2
Figure 4.2 QuickSet HMI Status Window Example................................................................................4.3
Figure 4.3 QuickSet Terminal Status Example........................................................................................4.4
Figure 5.1 QuickSet Prompt to Read Settings Groups............................................................................5.2
Figure 5.2 Design Template View ........................................................................................................... 5.3
Figure 5.3 Settings Editor View of a Design Template ........................................................................... 5.4
Figure 5.4 Settings Editor Views.............................................................................................................5.4
Figure 6.1 Aliased SER Report in QuickSet HMI................................................................................... 6.4
Figure C.1 Full-Size Enclosure With Combined Sensor Connector (With a Single Cable for Phase
and Neutral Sensors)...........................................................................................................C.2
Figure C.2 Full-Size Enclosure With Combined Sensor Connector (Installed With Cooper Junction
Box and Separate Neutral Sensor Cable) ...........................................................................C.3
Figure C.3 Full-Size Enclosure With Individual Sensor Connectors (Installed With a Lindsey
Neutral Current Sensor)......................................................................................................C.4
Figure C.4 Full-Size Enclosure With Individual Sensor Connectors (Installed With a Single Sensor
and Generic Neutral Current Sensor) .................................................................................C.5
Figure C.5 Full-Size Enclosure With Individual Sensor Connectors (Installed With a Generic
Neutral Current Sensor)......................................................................................................C.6
Figure C.6 Compact 7-Pin Enclosure.......................................................................................................C.7
Figure C.7 Compact 6-Jaw Option A Socket-Based Enclosure Connection Diagram.............................C.8
Figure E.1 Compact 4-Jaw Socket-Based Enclosure Schematic Diagram ..............................................E.2
Figure E.2 Compact 4-Jaw Socket-Based Enclosure Point-to-Point Wiring Diagram............................E.3
Figure E.3 Compact 6-Jaw Option A Socket-Based Enclosure Schematic Diagram ..............................E.4
Figure E.4 Compact 6-Jaw Option A Socket-Based Enclosure Point-to-Point Wiring Diagram............E.5
Figure E.5 Compact 6-Jaw Option B Socket-Based Enclosure Schematic Diagram...............................E.6
Figure E.6 Compact 6-Jaw Option B Socket-Based Enclosure Point-to-Point Wiring Diagram ............E.7
Figure E.7 Compact 7-Pin Connectorized Enclosure Schematic Diagram..............................................E.8
Figure E.8 Compact 7-Pin Connectorized Enclosure Point-to-Point Wiring Diagram............................E.9

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Date Code 20170207 Field Reference Guide SEL-734B Capacitor Bank Control
Preface
Overview
The SEL-734B Capacitor Bank Control is based on the SEL-734 Advanced
Metering System platform. Devices ship with an outdoor-rated enclosure and
are programmed with control strategies specific to each model option.
The SEL-734B Field Reference Guide provides a general overview of the
SEL-734B and describes the procedures for installation as a capacitor bank
control. This guide also provides troubleshooting and testing methods.
The SEL-734B Data Sheet details the model options available, the features
and control strategies associated with each option, as well as interface options
and compatible accessories.
The SEL-734B Design Template Guides describe the operation of the specific
enclosure model, detail the settings associated with the model option, and
contain logical diagrams for developers. Several design templates are
available, and each template is compatible with a specific enclosure model.
The SEL-734 Instruction Manual details all other features available in the
SEL-734 device, including metering, power quality, and communications.
Safety Information
Dangers, Warnings,
and Cautions
This manual uses three kinds of hazard statements, defined as follows:
Safety Symbols The following symbols are often marked on SEL products.
DANGER
Indicates an imminently hazardous situation
that, if not avoided, will result in death or
serious injury.
WARNING
Indicates a potentially hazardous situation
that, if not avoided, could result in death or
serious injury.
CAUTION
Indicates a potentially hazardous situation
that, if not avoided, may result in minor or
moderate injury or equipment damage.
CAUTION
Refer to accompanying documents.
ATTENTION
Se reporter à la documentation.
Earth (ground) Terre

viii
SEL-734B Capacitor Bank Control Field Reference Guide Date Code 20170207
Preface
Safety Information
Safety Marks The following statements apply to this device.
Protective earth (ground) Terre de protection
Direct current Courant continu
Alternating current Courant alternatif
Both direct and alternating current Courant continu et alternatif
Instruction manual Manuel d’instructions
General Safety Marks
CAUTION
There is danger of explosion if the battery is incorrectly replaced.
Replace only with Ray-O-Vac®no. BR2335 or equivalent recommended
by manufacturer. See Owner's Manual for safety instructions. The
battery used in this device may present a fire or chemical burn hazard
if mistreated. Do not recharge, disassemble, heat above 100°C or
incinerate. Dispose of used batteries according to the manufacturer’s
instructions. Keep battery out of reach of children.
ATTENTION
Une pile remplacée incorrectement pose des risques d’explosion.
Remplacez seulement avec un Ray-O-Vac®no BR2335 ou un produit
équivalent recommandé par le fabricant. Voir le guide d’utilisateur
pour les instructions de sécurité. La pile utilisée dans cet appareil peut
présenter un risque d’incendie ou de brûlure chimique si vous en faites
mauvais usage. Ne pas recharger, démonter, chauffer à plus de 100°C
ou incinérer. Éliminez les vieilles piles suivant les instructions du
fabricant. Gardez la pile hors de la portée des enfants.
For use in Pollution Degree 2 environment. Pour l'utilisation dans un environnement de Degré de Pollution 2.
Ambient air temperature shall not exceed 40°C (104°F). La température ambiante de l'air ne doit pas dépasser 40°C (104°F).
Terminal Ratings Valeurs nominales des bornes
Wire Material
Copper Matériau de fil Cuivre
Tightening Torque
Other Terminal Blocks: 0.8 Nm (7.0 in-lb) Couple de Serrage Autres borniers : 0,8 Nm (7,0 livres-pouce)
Hazardous Locations Safety Marks
WARNING – EXPLOSION HAZARD
Open circuit before removing cover.
AVERTISSEMENT – DANGER D'EXPLOSION
Ouvrir le circuit avant de déposer le couvercle.
WARNING – EXPLOSION HAZARD
Substitution of components may impair suitability for Class I,
Division 2.
AVERTISSEMENT – DANGER D'EXPLOSION
La substitution de composants peut détériorer la conformité à
Classe I, Division 2.
Operating Temperature Range: –40°C to +85°C (–40°F to
+185°F). Plage de température de fonctionnement : –40°C à +85°C (–40°F à +185°F).
Hazardous Locations Operating Temperature Range: –20°C to
+40°C (–4°F to +104°F). Emplacements Plage de température de fonctionnement d’emplacements dangereux : –20°C à +40°C (–4°F à +104°F).
Other Safety Marks (Sheet 1 of 2)
DANGER
Disconnect or de-energize all external connections before opening this
device. Contact with hazardous voltages and currents inside this
device can cause electrical shock resulting in injury or death.
DANGER
Débrancher tous les raccordements externes avant d’ouvrir cet
appareil. Tout contact avec des tensions ou courants internes à
l’appareil peut causer un choc électrique pouvant entraîner des
blessures ou la mort.
DANGER
Contact with instrument terminals can cause electrical shock that can
result in injury or death.
DANGER
Tout contact avec les bornes de l’appareil peut causer un choc
électrique pouvant entraîner des blessures ou la mort.

ix
Date Code 20170207 Field Reference Guide SEL-734B Capacitor Bank Control
Preface
General Information
General Information
Technical Assistance Obtain technical assistance from the following:
Schweitzer Engineering Laboratories, Inc.
2350 NE Hopkins Court
Pullman, WA 99163-5603 U.S.A.
Tel: [phone]
Fax: [phone]
Internet: selinc.com
Email: [email protected]
WARNING
Use of this equipment in a manner other than specified in this manual
can impair operator safety safeguards provided by this equipment.
AVERTISSEMENT
L’utilisation de cet appareil suivant des procédures différentes de
celles indiquées dans ce manuel peut désarmer les dispositifs de
protection d’opérateur normalement actifs sur cet équipement.
WARNING
Have only qualified personnel service this equipment. If you are not
qualified to service this equipment, you can injure yourself or others,
or cause equipment damage.
AVERTISSEMENT
Seules des personnes qualifiées peuvent travailler sur cet appareil. Si
vous n’êtes pas qualifiés pour ce travail, vous pourriez vous blesser
avec d’autres personnes ou endommager l’équipement.
WARNING
This device is shipped with default passwords. Default passwords
should be changed to private passwords at installation. Failure to
change each default password to a private password may allow
unauthorized access. SEL shall not be responsible for any damage
resulting from unauthorized access.
AVERTISSEMENT
Cet appareil est expédié avec des mots de passe par défaut. A
l’installation, les mots de passe par défaut devront être changés pour
des mots de passe confidentiels. Dans le cas contraire, un accès non-
autorisé á l’équipement peut être possible. SEL décline toute
responsabilité pour tout dommage résultant de cet accès non-autorisé.
CAUTION
Equipment components are sensitive to electrostatic discharge (ESD).
Undetectable permanent damage can result if you do not use proper
ESD procedures. Ground yourself, your work surface, and this
equipment before removing any cover from this equipment. If your
facility is not equipped to work with these components, contact SEL
about returning this device and related SEL equipment for service.
ATTENTION
Les composants de cet équipement sont sensibles aux décharges
électrostatiques (DES). Des dommages permanents non-décelables
peuvent résulter de l’absence de précautions contre les DES.
Raccordez-vous correctement à la terre, ainsi que la surface de travail
et l’appareil avant d’en retirer un panneau. Si vous n’êtes pas équipés
pour travailler avec ce type de composants, contacter SEL afin de
retourner l’appareil pour un service en usine.
CAUTION
Use of controls or adjustments, or performance of procedures other
than those specified herein, may result in hazardous radiation
exposure.
ATTENTION
L’utilisation de commandes ou de réglages, ou l’application de tests de
fonctionnement différents de ceux décrits ci-après peuvent entraîner
l’exposition à des radiations dangereuses.
CAUTION
Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate
the equipment.
ATTENTION
Les changements ou modifications qui ne sont pas expressément
approuvés par l'autorité responsable de se prononcer sur la
conformité pourraient annuler le pouvoir de l'usager à actionner
l'équipement.
CAUTION
Connect only 120 Vac nominal to the SEL-734B socket stab VOLTAGES
connector.
ATTENTION
Connecter seulement 120 Vca nominal au connecteur de prise VOLTAGES
(Tensions) du SEL-734B
CAUTION
Ground the SEL-734B Capacitor Bank Control cabinet chassis before
making any other connections to the cabinet.
ATTENTION
Mettre à la terre le châssis de l'armoire du Contrôle de batterie de
condensateurs SEL-734B avant de faire toute autre connexion à
l'armoire.
Other Safety Marks (Sheet 2 of 2)

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Date Code 20170207 Field Reference Guide SEL-734B Capacitor Bank Control
Section 1
Overview
Introduction
The SEL-734B Capacitor Bank Control, with low-energy analog (LEA)
inputs, provides advanced capabilities for capacitor bank control and feeder
monitoring. Design templates are custom settings interfaces, built for the Full-
Size Enclosure and Compact Enclosure models, which configure the
SEL-734B for capacitor bank control.
This Field Reference Guide describes procedures by which the user can
perform the following actions.
➤Install any type of SEL-734B enclosure model
➤Establish initial communications
➤Configure critical settings applicable to all design templates
➤Commission, troubleshoot, and test the system
For model-specific operation and functions, please refer to the appropriate
design template guide, located at selinc.com.
SEL offers the SEL-734B device installed inside of an outdoor-rated
enclosure and preconfigured for capacitor bank control. Figure 1.1 shows the
SEL-734B model options.
Figure 1.1 SEL-734B Model Options in Outdoor-Rated Enclosures
NOTE: The SEL-734B is also available
as a loose device, not installed in an
enclosure and not programmed for
capacitor bank control.
Full-Size Enclosure
Compact Enclosure Options
(4-Jaw, 6-Jaw, 7-Pin)
SEL-734B Device

1.2
SEL-734B Capacitor Bank Control Field Reference Guide Date Code 20170207
Overview
SEL-734B Front Panel
SEL-734B Front Panel
This section describes the general front-panel functionality of the SEL-734B.
Refer to the associated Capacitor Bank Control Design Template Guide for
information on the front-panel functionality when the device is factory-
programmed for capacitor bank control.
The function of front-panel LEDs and pushbuttons are factory-programmed
based on your enclosure model option. Blank labels shipped with the device
can be used to indicate new functionality. Figure 1.2 depicts the front panel of
the SEL-734B with default labels installed as on the standalone device.
Figure 1.2 SEL-734B Front Panel
ENABLED LED This LED shows the diagnostics status of the SEL-734B. An illuminated
ENABLED LED indicates that the SEL-734B is operating properly. If the
ENABLED LED turns off, the SEL-734B requires service.
Configurable LEDs
and Pushbuttons
All front-panel LEDs except for the ENABLED LED are configurable. The
SEL-734B has four control pushbuttons and one TARGET RESET button. Custom
labels on the front panel and settings in the device define the functionality of
the pushbuttons and LEDs. Refer to the appropriate design template guide for
details on the functionality of the capacitor bank control program.
Test Front-Panel LEDs Press the TARGET RESET button to illuminate all front-panel LEDs for test. This
pushbutton is configurable and performs other functions for capacitor bank
control. Please refer to the appropriate design template guide for details on the
programmed functionality of the TARGET RESET pushbutton.
Menu Pushbuttons The menu pushbuttons provide access to the front-panel menu and are not
configurable. You can use the menu to perform the following tasks:
➤View the status and diagnostics of the SEL-734B
➤View metering data
➤View and change device settings
➤View event data
ENABLED LED
TARGET RESET
Button
Menu Pushbuttons
Six Configurable
LEDs
Four Pushbuttons
and Eight Configurable LEDs

1.3
Date Code 20170207 Field Reference Guide SEL-734B Capacitor Bank Control
Overview
SEL-734B Rear Panel
SEL-734B Rear Panel
Figure 1.3 shows a diagram of the rear-panel connections on a typical
SEL-734B model.
Figure 1.3 Top Label and Rear Panel
A label on the top of the SEL-734B defines the function of each rear-panel
terminal or communications port.
The rear panels are divided into six slots: Slot A, B, C, D, E, and Z. Terminals
are designated by the slot letter and the terminal number. For example, Slot D
terminals are designated D01 through D14.
Power Supply Board Slot A contains the circuit board to power the SEL-734B. This slot also
contains two Form A output contacts, one Form C output contact, and two
digital inputs. In the Full-Size Enclosure option, the two Form A contacts
operate the capacitor bank switch.

1.4
SEL-734B Capacitor Bank Control Field Reference Guide Date Code 20170207
Overview
Enclosure Front
Main CPU Board Slot B contains the main CPU board. This slot also contains two EIA-232
communications ports. The optional Ethernet port is also located on this
board.
Optional
Communications
Board
Slot C may contain an optional communications or analog input board.
Typically, this slot is empty.
Input/Output Board Slot D contains an input/output (I/O) board. The board contains the output
contacts to operate the capacitor bank switches. All output contacts on this
board operate the capacitor bank switches.
Voltage and Current
Measurement Board
Slot E contains the low-energy analog (LEA) input board. Three voltage
sensors and three current sensors connect to this board. Optionally, the board
can have a fourth neutral current channel.
Note: There are two versions of the LEA cards for the SEL-734B for use
depending on the application.
➤4 LEA Current Sense Inputs and 3 LEA Voltage Sense
Inputs (1 Minput impedance, 0.1–12.5 Vac and 10 M
input impedance, 0.4–25.0 Vac, respectively). This card is
used in Full-Size Enclosures in which sensing and control of
the three phases are typically independent, and combination
line post sensors are used (which provide both voltage and
current signals for each phase).
➤4 LEA Current Sense Inputs and 3 Single-Phase Voltage
Sense Inputs (1 Minput impedance, 0.1–12.5 Vac and
10 Minput impedance, 57–150 Vac, respectively). This
card is used in compact enclosures in which there is typically
only one phase of sensing and the three capacitor switches are
operated simultaneously. In these applications, a single
current-only line post sensor is used, and the control power
transformer voltage is used as the voltage sensing input.
Integrated 15 Vdc
Power Supply Board
Slot Z optionally contains the integrated 15 Vdc power supply for accessories.
This module provides a 15 Vdc source to power accessories in the cabinet.
Enclosure Front
The following section provides a description of the front of the enclosure.
Front-Panel Voltage
Jacks
The voltage test jacks labeled LINE and NEUTRAL are for use with a handheld
voltage meter to measure the voltage provided to the cabinet. These jacks are
not designed to be used as external power jacks.
Fuse Holders The device is electrically protected by a 12 A fuse labeled LINE on the front
panel. The fuse labeled Neutral MOV protects the neutral leg of the MOV surge
arrestor. This fuse will not disconnect the neutral from the cabinet; it only
disconnects the neutral of the MOV to protect against damage in the unlikely
event of an MOV failure.

1.5
Date Code 20170207 Field Reference Guide SEL-734B Capacitor Bank Control
Overview
Enclosure Front
Serial and Ethernet
Patch Cables
Socket-based compact enclosures have patch cables connected to the
communications ports at the back of the SEL-734B.
If an SEL-3060 radio is installed in the enclosure, the Ethernet port is
connected to the radio; otherwise, an RJ45 Ethernet patch cable is accessible
from the front of the enclosure.
Two serial patch cables connect to PORT 2 and PORT 3 of the SEL-734B. The
patch cables are accessible from the front of the enclosure. The cables have a
male DB-9 connector, and one female/female DB-9 gender changer is
provided with the enclosure.
Front Door Label Socket-based compact enclosures provide a schematic diagram on the inside
of the enclosure door. The following information is also included on the label:
➤Serial number
➤Model option number
SEL-3060 Ethernet
Radio
Socket-based compact enclosures are available with the SEL-3060 Ethernet
Radio. When the enclosure is ordered with the radio, SEL installs an N-type
surge arrestor on the bottom of the enclosure to allow connection of an
antenna. The antenna and cable are sold separately.
SEL-3031 Serial Radio Full-size enclosures with the combined sensor connector are available with the
SEL-3031 Serial Radio pre-installed. The antenna, cable, and N-type surge
arrestor are sold separately.
SEL-2401 Satellite-
Synchronized Clock
Compact Enclosure
Socket-based compact enclosures are available with the SEL-2401 Satellite-
Synchronized Clock. Enclosures ordered with the SEL-2401 come with a low-
profile satellite antenna on top of the enclosure and the SEL-2401 output
connected to the IRIG-B input on the SEL-734B.
Full-Size Enclosure With Combined Sensor Connector
Full-size enclosures with the combined sensor connector are available with the
SEL-2401 pre-installed. Enclosures ordered with the SEL-2401 come with the
SEL-2401 output connected to the IRIG-B input on the SEL-734B and a
TNC-type surge arrestor and connector installed on the bottom of the
enclosure to allow for connection of a satellite antenna. The antenna and cable
are sold separately.
Open Door
Indications
Some enclosure models have a door switch wired to a digital input on the
SEL-734B. The digital input changes state when the door is opened and the
indication is mapped to the DNP Binary Inputs for SCADA. Check the
ordering option of your enclosure to determine if your model supports an open
door indication switch.

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Date Code 20170207 Field Reference Guide SEL-734B Capacitor Bank Control
Section 2
Field Connections to the Enclosures
Overview
This section describes the field connections to the enclosure. A description of
the control and sensor cables is also given. Detailed drawings of the various
cables are provided in Appendix D: Cable Drawings.
Connections to Full-Size Enclosures
SEL offers two versions of the Full-Size Enclosure. The Combined Sensor
Connector version contains one 14-pin sensor connector and one 19-pin
control connector. The Individual Sensor Connector version contains three
4-pin sensor connectors, one 19-pin control connector, and one 4-pin power
supply/neutral sensor connector.
Combined Sensor
Connector Version
Figure 2.1 shows the bottom view of the Full-Size Enclosure model with the
combined sensor connector. All three phase sensors and the neutral sensor
connect to the 14-pin connector on the bottom of the enclosure. Optionally,
you can connect a neutral current sensor to terminal blocks inside the
enclosure and route the cabling through openings on the bottom of the
enclosure. The 19-pin connector routes the control power to the switches from
the enclosure.
Figure 2.1 Bottom View of Enclosure With Combined Sensor Connector
CAUTION
Ground the SEL-734B Capacitor Bank
Control cabinet before making any
other connections to the cabinet.
14-Pin Sensor
Connector J1
Style 3102
Insert Arrangement
22-19P
19-Pin Control Connector J2
Style 3102
Insert Arrangement
22-14P
Ground Lug
Clock Antenna
Surge Arrestor Type TNC
0.88” Diameter
Penetration
10.02”
16.00”
Lockable
Latches, 0.38”
(2 Places)

2.2
SEL-734B Capacitor Bank Control Field Reference Guide Date Code 20170207
Field Connections to the Enclosures
Connections to Full-Size Enclosures
19-Pin Control Connector
The control connector sends open and close signals to each capacitor bank
switch, contains provisions to monitor the auxiliary (52a and 52b) contacts,
and connects to the control power transformer. Table 2.1 lists the functions of
the connector’s pins.
Control Cables for Enclosures With the Combined Sensor Connector
Each of the following cables connect to the 19-pin control connector. Use
Table 2.2 to identify the control cable compatible with your installation.
Table 2.1 Pinout of Control Connector for Full-Size Enclosures With the
Combined Sensor Connector
Pin Number Description
A 120 Vac Control Power Transformer
B Control Power Transformer Neutral
C Open A-Phase
DCloseA-Phase
E Reserved
F Open B-Phase
G Close B-Phase
H Reserved
J Open C-Phase
KCloseC-Phase
L Reserved
M A-Phase 52a Auxiliary Contact
N A-Phase 52b Auxiliary Contact
P B-Phase 52a Auxiliary Contact
R B-Phase 52b Auxiliary Contact
S C-Phase 52a Auxiliary Contact
T C-Phase 52b Auxiliary Contact
U Reserved
V Reserved