Schweitzer Engineering Laboratories SEL-387E User manual

SEL-387E Relay
Current Differential and
Voltage Protection Relay
Instruction Manual
20080110
*PM387E-01-NB*

!
CAUTION: The relay contains devices sensitive
to electrostatic discharge (ESD). When working
on the relay with front or top cover removed,
work surfaces and personnel must be properly
grounded or equipment damage may result.
!
ATTENTION: Le relais contient des pièces
sensibles aux décharges électrostatiques (DES).
Quand on travaille sur le relais avec le panneau avant
ou du dessus enlevé, les surfaces de travail et le
personnel doivent être mis à la terre convenablement
pour éviter les dommages à l'équipement.
!
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. Dispose of used
batteries according to the manufacturer’s
instructions.
!
ATTENTION: Il y a un danger d’explosion si la
pile électrique n’est pas correctement remplacée.
Utiliser exclusivement Ray-O-Vac
®
No. BR2335 ou
un équivalent recommandé par le fabricant. Se
débarrasser des piles usagées suivant les instructions
du fabricant.
!
CAUTION: The continuous rating of the current
inputs is 3 · I
nom
. If any currents in this test will
exceed this rating, reduce the TAPn values as
needed, to prevent possible damage to the input
circuits.
!
ATTENTION: La capacité, en régime permanent,
des entrées de courant est 3 · I
nom
. Si un courant
d’essai dépassait cette valeur, réduire la prise TAPn
pour prévenir les dommages aux circuits d’entrée.
!
CAUTION: The continuous rating of the current
inputs is 3 · I
nom
. For this test, you may want to
choose low values of U87P and TAPn, in order to
limit the required test current to a safe value.
!
ATTENTION: La limite, en régime permanent, des
entrées de courant est 3 · I
nom
. Pour ce test, vous
pourriez choisir de valeurs peu élevées pour U87P et
TAPn, de façon à limiter le courant de test à une
valeur sécuritaire.
!
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 équipement 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 à l'équipement
pourrait être possible. SEL décline toute
responsabilité pour tout dommage résultant de cet
accès non-autorisé.
!
DANGER: Removal of relay front panel exposes
circuitry which may cause electrical shock that
can result in injury or death.
!
DANGER: Le retrait du panneau avant expose à la
circuiterie qui pourrait être la source de chocs
électriques pouvant entraîner des blessures ou la
mort.
!
DANGER: Contact with instrument terminals
may cause electrical shock which can result in
injury or death.
!
DANGER: Le contact avec les bornes de l'
instrument peut causer un choc électrique pouvant
entraîner des blessures ou la mort.
© 2000–2008 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 US 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 manual is provided for informational use only and is subject to change without notice. Schweitzer Engineering Laboratories, Inc.
has approved only the English language manual.
This product is covered by the standard SEL 10-year warranty. For warranty details, visit www.selinc.com or contact your customer service
representative. PM387E-01

Date Code 20080110 Table of Contents i
SEL-387E Instruction Manual
SEL-387E INSTRUCTION MANUAL
TABLE OF CONTENTS
SECTION 1: INTRODUCTION AND SPECIFICATIONS
SECTION 2: INSTALLATION
SECTION 3: PROTECTION FUNCTIONS
SECTION 4: CONTROL LOGIC
SECTION 5: METERING AND MONITORING
SECTION 6: SETTINGS
SECTION 7: COMMUNICATIONS
SECTION 8: FRONT-PANEL OPERATION
SECTION 9: ANALYZING EVENTS
SECTION 10: TESTING AND TROUBLESHOOTING
SECTION 11: APPENDICES
Appendix A: Firmware and Manual Versions
Appendix B: SEL-300 Series Relays Firmware Upgrade Instructions
Appendix C: SEL Distributed Port Switch Protocol (LMD)
Appendix D: Configuration, Fast Meter, and Fast Operate Commands
Appendix E: Compressed ASCII Commands
Appendix F: Unsolicited SER Protocol
Appendix G: Distributed Network Protocol (DNP3)
Appendix H: IEC 61850 Communications
SECTION 12: SEL-387E RELAY COMMAND SUMMARY

Date Code 20080110 Introduction and Specifications i
SEL-387E Instruction Manual
TABLE OF CONTENTS
SECTION 1: INTRODUCTION AND SPECIFICATIONS......................1-1
Introduction...................................................................................................................................1-1
Instruction Manual Overview.......................................................................................................1-1
Relay Functions ............................................................................................................................1-2
Current Differential Protection .............................................................................................1-2
Restricted Earth Fault Protection..........................................................................................1-3
Overcurrent Protection..........................................................................................................1-3
Volts-per-Hertz Protection....................................................................................................1-3
Overvoltage and Undervoltage Protection............................................................................1-3
Frequency Protection ............................................................................................................1-4
Through-Fault Event Monitor...............................................................................................1-4
Programmable Optoisolated Inputs and Output Contacts ....................................................1-4
Model Options ..............................................................................................................................1-4
Conventional Terminal Blocks .............................................................................................1-4
Plug-In Connectors (Connectorized
®
)...................................................................................1-4
Specifications................................................................................................................................1-5
General..................................................................................................................................1-5
Metering Accuracy ...............................................................................................................1-8
Station DC Battery Monitor..................................................................................................1-8
Differential Element .............................................................................................................1-8
Harmonic Element ................................................................................................................1-9
Instantaneous/Definite-Time Overcurrent Elements (Winding) ..........................................1-9
Time Overcurrent Elements (Winding and Combined Current) ..........................................1-9
Over-/Undervoltage Elements ............................................................................................1-10
Frequency Element .............................................................................................................1-10
Volts/Hertz Element ...........................................................................................................1-10
FIGURES
Figure 1.1: SEL-387E Relay Functional Overview ................................................................................1-2

Date Code 20080110 Introduction and Specifications 1-1
SEL-387E Instruction Manual
SECTION 1: INTRODUCTION AND SPECIFICATIONS
I NTRODUCTION
Use this relay to protect two- to three-winding power transformers, buses, reactors, generators,
large motors, or other multiterminal power apparatus. Three- or four-terminal applications
permit separate connection of current transformers from two breakers connected to the same
transformer winding, such as in ring-bus or breaker-and-a-half schemes. The relay settings
permit you to use wye- or delta-connected current transformers with virtually any type of
transformer winding connection.
The SEL-387E Differential Relay provides three differential elements with dual slope
characteristics. The second slope provides security against CT saturation for heavy through
faults. Be sure to conduct detailed analysis of CT performance under worst-case saturation
conditions to set the relay characteristic correctly for bus protection applications. For assistance
with CT selection, obtain SEL Application Guide 99-07 Bus Protection Using a Four-Winding
Low-Impedance Percentage Differential Relay from the SEL Web site (www.selinc.com).
I NSTRUCTION M ANUAL O VERVIEW
This instruction manual applies to the SEL-387E Relay. If you are unfamiliar with this relay, we
suggest that you read the following sections in the outlined order.
Section 1: Introduction and Specifications for an introduction, instruction manual overview,
relay functional overview, and specifications.
Section 3: Protection Functions to understand the protection elements and their associated
settings.
Section 4: Control Logic to understand inputs, the Relay Word, outputs, and logic. Use this
section to understand the settings necessary for implementing your logic.
Section 6: Setting the Relay to understand settings that are not described in Section 3 or
Section 4, for default settings, and for settings sheets.
Section 7: Communications for a description of the serial port commands used to set the relay
for control, obtain target information, and obtain metering information, etc.
Section 8: Front-Panel Operation for a description of how to perform the serial port commands
from the front panel.
Section 5: Metering and Monitoring to learn how to retrieve operations data such as metering,
DC battery monitor, breaker monitor, and relay status.
Section 9: Analyzing Events for a description of event report and sequential events report
generation, event report formats, sequential event reports, and report interpretation.

1-2 Introduction and Specifications Date Code 20080110
SEL-387E Instruction Manual
Section 2: Installation to learn how to configure, install, and wire your relay.
Section 10: Testing and Troubleshooting for test procedures and a troubleshooting guide. You
can use this section as a tutorial to check your understanding of the relay's operation.
R ELAY F UNCTIONS
52
52
52
24
V/Hz Under-/
Overfrequency
81
Undervoltage
27
Time Overcurrent
Phase
Ground
Neg. Seq.
Overcurrent
Phase
Ground
Neg. Seq.
Time Overcurrent
Phase
Ground
Neg. Seq.
Three-Phase
Current
Differential
Overcurrent
Phase
Ground
Neg. Seq.
Time Overcurrent
Phase
Ground
Neg. Seq.
Overcurrent
Phase
Ground
Neg. Seq.
Combined
Time Overcurrent
Phase
Ground
Overvoltage
59
50
P
G
Q
51
P
G
Q
50 87
P
G
Q
51
P
G
Q
50
P
G
Q
51
51
P
G
Q
SEL-387E Relay
P
G
Auto-
transformer
3
3
SELOGIC
®
Control Equations
Event Reports and
Sequential Events Recorder
Breaker Wear Monitor
Station Battery Monitor
ASCII, Binary, and Distributed
Port Switch Communications
Remote and Local
Control Switches
Accurate Metering
Restrained and Unrestrained
Differential Elements
Second- and Fifth-
Harmonic Blocking
CT and Transformer
Connection Compensation
*Additional I/O
*Optional Functions
3
Figure 1.1: SEL-387E Relay Functional Overview
Current Differential Protection
The SEL-387E Relay includes independent restrained and unrestrained current differential
elements. The restrained element has a dual-slope, variable-percentage restraint characteristic.
Use the fifth-harmonic element to prevent relay misoperation during allowable overexcitation
conditions. Even-harmonic elements (second and fourth harmonic) provide security against
inrush currents during transformer energization, complemented by the dc element which
measures the dc offset. The even-harmonic element offers the choice between harmonic
blocking and harmonic restraint. In the blocking mode, the user selects either blocking on an
individual phase basis or on a common basis, as per application and philosophy. The second-,
fourth-, and fifth-harmonic thresholds are set independently, and the dc blocking and harmonic
restraint features are enabled independently. A separate unrestrained differential element
provides faster clearance of high-magnitude internal faults.

Date Code 20080110 Introduction and Specifications 1-3
SEL-387E Instruction Manual
Restricted Earth Fault Protection
The SEL-387E Relay provides sensitive detection of internal ground faults via the Restricted
Earth Fault (REF) protection element. The Winding 3 inputs are used for introduction of neutral
CT polarizing current. Operating current is derived from the residual current calculated for the
protected winding. A directional element determines whether the fault is internal or external.
Tripping is supervised by zero-sequence current thresholds and a positive-sequence current
restraint setting. The REF function is applicable to a single grounded wye winding or an
autotransformer with one breaker and set of CTs at one terminal and one breaker and set of CTs
at the other terminal. Since the Winding 3 inputs are used for the neutral CT, only two of the
winding inputs may be used for normal differential or overcurrent protection purposes.
Overcurrent Protection
The SEL-387E Relay provides nondirectional overcurrent elements for each winding/terminal:
• Phase Overcurrent: Three-level instantaneous; definite time; inverse time
• Residual Overcurrent: Instantaneous; definite time; inverse time
• Negative-Sequence Overcurrent: Instantaneous; definite time; inverse time
In addition, the SEL-387E Relay has two special overcurrent functions:
• Combined overcurrent (inverse time, phase, and ground) for summed currents from
Windings 1 and 2
• Restricted Earth Fault (REF) protection for sensitive ground fault detection in grounded
wye-connected windings
Overcurrent element pickup settings and operating characteristics are independent of the
differential element settings. Most elements can be torque controlled.
Volts-per-Hertz Protection
The SEL-387E Relay provides sensitive dual-level elements to detect voltage overexcitation.
Level 1 volts-per-hertz elements provide instantaneous and definite-time operation for alarm or
trip. Level 2 elements provide one of three selectable inverse-time/definite-time composite
characteristics, or one user-definable inverse-time characteristic, for alarm or trip. Both volts-
per-hertz protection levels may be torque controlled.
Overvoltage and Undervoltage Protection
The SEL-387E Relay provides eight overvoltage and undervoltage elements. Elements include
phase undervoltage and overvoltage elements, phase-to-phase undervoltage and overvoltage
elements, as well as positive sequence, negative sequence, and residual overvoltage elements.
Phase and phase-to-phase elements operate when any individual phase exceeds the respective
setting. Combine these elements with SEL
OGIC control equations to provide time delays for up
to 999999 cycles. The elements have many applications in protection, control, and indication.

1-4 Introduction and Specifications Date Code 20080110
SEL-387E Instruction Manual
Frequency Protection
The SEL-387E Relay provides six levels of under-/overfrequency elements. Each element can
operate as either an underfrequency or as an overfrequency element, depending on its pickup
setting. Should any phase voltage fall below a user-defined value, the relay disables all
frequency elements, providing security against loss-of-potential conditions. The relay tracks the
system frequency from 40.1 to 65 Hz to provide measurement of frequency excursions over a
wide range. Apply the elements readily to underfrequency load shedding and restoration control
systems.
Through-Fault Event Monitor
Through faults are a major cause of transformer damage and failure. Fault currents cause
cumulative mechanical damage by displacing transformer windings every time a fault occurs.
Thermal stress from fault currents damages insulation. The SEL-387E Relay provides a through-
fault event monitor to gather fault current level, duration, and date/time for each through fault.
The monitor performs a simple I
2
t calculation and cumulatively stores calculation results for each
phase. Use these through-fault event data to schedule proactive maintenance for transformers
and to help justify possible system enhancements to mitigate through faults.
Programmable Optoisolated Inputs and Output Contacts
The SEL-387E Relay is equipped with enhanced SEL
OGIC control equations that allow design of
a custom tripping or control scheme. SEL
OGIC control equation functions include independent
timers, tripping, closing, event report triggering, and relay output contact control.
M ODEL O PTIONS
Conventional Terminal Blocks
This model includes hardware that supports nine current inputs, three voltage inputs, six
optoisolated inputs, seven programmable output contacts, one alarm contact, three EIA-232
ports, one EIA-485 port, and IRIG-B time code. It uses terminal blocks that support #6 ring
terminals. This robust package meets or exceeds numerous industry standard type tests.
This relay is available in a 3.50" (2U) or 5.25" (3U) rack-mount package or 4.9" or 6.65"
panel-mount package. Additional optoisolated inputs and programmable output contacts are
available with the larger packages.
Plug-In Connectors (Connectorized
®
)
This model includes hardware that supports all of the features of the conventional terminal
blocks model. It differs in its use of plug-in connectors instead of terminal blocks. In addition,
it provides
• Quick connect/release hardware for rear-panel terminals.
• Level-sensitive optoisolated inputs.

Date Code 20080110 Introduction and Specifications 1-5
SEL-387E Instruction Manual
This robust package meets or exceeds numerous industry standard type tests. It is available in a
5.25" (3U) rack-mount package or a 6.65" panel-mount package.
S PECIFICATIONS
General
Terminal Rear Screw-Terminal Tightening Torque
Connections: Terminal Block:
Minimum: 8 in-lb (0.9 Nm)
Maximum: 12 in-lb (1.4 Nm)
Connectorized (for further information, see SEL Application Guide 2001-03, Installing and
Servicing Connectors for Connectorized
®
Relays):
Minimum: 4.4 in-lb (0.5 Nm)
Maximum: 8.8 in-lb (1.0 Nm)
Terminals or stranded copper wire. Ring terminals are recommended. Minimum temperature
rating of 105°C.
AC Current Inputs:
5 A nominal: 15 A continuous, 500 A for 1 s, linear to 100 A symmetrical
1250 A for 1 cycle
Burden: 0.27 VA @ 5 A, 2.51 VA @ 15 A
1 A nominal: 3 A continuous, 100 A for 1 s, linear to 20 A symmetrical,
250 A for 1 cycle
Burden: 0.13 VA @ 1 A, 1.31 VA @ 3 A
AC Voltage Inputs: 300 V
L-N
, three-phase, four-wire connection
300 V continuous (connect any voltage from 0 to 300 Vac)
600 V for 10 s
Burden: 0.03 VA @ 67 V; 0.06 VA @ 120 V; 0.8 VA @ 300 V
Power Supply:
Rated: 125/250 Vdc or Vac
Range: 85–350 Vdc or 85–264 Vac
Burden: <25 W
Interruption: 45 ms at 125 Vdc
Ripple: 100%
Rated: 48/125 Vdc or 125 Vac
Range: 38–200 Vdc or 85–140 Vac
Burden: <25 W
Interruption: 160 ms at 125 Vdc
Ripple: 100%
Rated: 24/48 Vdc
Range: 18–60 Vdc polarity dependent
Burden: <25 W
Interruption: 110 ms at 48 Vdc
Ripple: 100%
Note: Interruption and Ripple per IEC 60255-11 [IEC 255-11]:1979.
Output Contacts:
Standard:
Make: 30A; Carry: 6 A continuous carry at 70°C, 4 A continuous carry at 85°C;
1 s rating: 50 A; MOV protected: 270 Vac, 360 Vdc, 40 J;
Pickup time: Less than 5 ms; Dropout time: Less than 5 ms, typical
Breaking Capacity (10000 operations):
24 V 0.75 A L/R = 40 ms
48 V 0.50 A L/R = 40 ms
125 V 0.30 A L/R = 40 ms
250 V 0.20 A L/R = 40 ms

1-6 Introduction and Specifications Date Code 20080110
SEL-387E Instruction Manual
Cyclic Capacity (2.5 cycles/second):
24 V 0.75 A L/R = 40 ms
48 V 0.50 A L/R = 40 ms
125 V 0.30 A L/R = 40 ms
250 V 0.20 A L/R = 40 ms
High Current Interrupting Option:
Make: 30A; Carry: 6 A continuous carry at 70°C, 4 A continuous carry at 85°C;
1 s rating: 50 A; MOV protected: 330 Vdc, 130 J;
Pickup time: Less than 5 ms; Dropout time: Less than 8 ms, typical
Breaking Capacity (10000 operations):
24 V 10 A L/R = 40 ms
48 V 10 A L/R = 40 ms
125 V 10 A L/R = 40 ms
250 V 10 A L/R = 20 ms
Cyclic Capacity (4 cycles in 1 second, followed by 2 minutes idle for thermal dissipation):
24 V 10 A L/R = 40 ms
48 V 10 A L/R = 40 ms
125 V 10 A L/R = 40 ms
250 V 10 A L/R = 20 ms
Note: Do not use high current interrupting output contacts to switch ac control signals. These outputs
are polarity dependent.
Note: Make per IEEE C37.90-1989; Breaking and Cyclic Capacity per IEC 60255-23
[IEC 255-23]: 1994.
Optoisolated Inputs: 250 Vdc: Pickup 200–300 Vdc; Dropout 150 Vdc
125 Vdc: Pickup 105–150 Vdc; Dropout 75 Vdc
110 Vdc: Pickup 88–132 Vdc; Dropout 66 Vdc
48 Vdc: Pickup 38.4–60 Vdc; Dropout 28.8 Vdc
24 Vdc: Pickup 15.0–30 Vdc
Note: 24, 48, and 125 Vdc optoisolated inputs draw approximately 4 mA of current, 110 Vdc inputs
draw approximately 8 mA of current, and 250 Vdc inputs draw approximately 5 mA of current.
All current ratings are at nominal input voltage.
Routine V, I inputs, optoisolated inputs, output contacts: 2500 Vac for 10 s;
Dielectric Strength: Power supply: 3100 Vdc for 10 s; EIA-485 communications port: 2200 Vdc
Frequency System Frequency: 50 or 60 Hz; Phase Rotation: ABC or ACB;
and Rotation: Frequency Tracking Range: 40.1–65.0 Hz
Note: V
A
required for frequency tracking.
Serial
Communications
Ports: EIA-232: 1 front and 2 rear; EIA-485: 1 rear, 2100 Vdc isolation; Baud rate: 300–19200 bps
Ethernet
Communications
Port:
Application Protocols
FTP to Card: 1 server session (supports IEC 61850 CID files)
Telnet to Card: 1 server session (supports SEL ASCII)
Telnet to Host: 1 server session (supports SEL ASCII, SEL Compressed ASCII,
Fast Meter, and Fast Operate)
IEC 61850: 6 MMS sessions
16 incoming GOOSE messages
8 outgoing GOOSE messages
Protocol Stacks
TCP/IP
OSI

Date Code 20080110 Introduction and Specifications 1-7
SEL-387E Instruction Manual
Ports (PORT 5 and PORT 6)
PORT 5 is supported.
PORT 6 will be enabled with a future firmware upgrade.
Physical Layer Options (PORT 5 and PORT 6)
10/100BASE-T: 10/100 Mbps, RJ-45 connector
100BASE-FX: 100 Mbps, LC connector
Indicators (PORT 5 and PORT 6)
Link: Green LED is on when the link is operational
Activity: Red LED blinks when there is transmit or receive activity
Time-Code Input: Relay accepts demodulated IRIG-B time-code input at Port 1 or 2. Relay is time synchronized to
within ±5 ms of time source input.
Operating Temp.:
–40°to +85°C (–40°to +185°F)
Weight: 2U rack unit height: 15 lbs (6.8 kg); 3U rack unit height: 17.75 lbs (8 kg)
Type Tests: *Generic Emissions, Heavy Industrial: EN 50081-2:1993, Class A
*Generic Immunity, Heavy Industrial: EN 50082-2:1995
*Radiated and Conducted Emissions: EN 55011:1998, Class A
*Conducted Radio Frequency: EN 61000-4-6:1996,
ENV 50141:1993,
10 Vrms
Radiated Radio Frequency
(900 MHz with modulation): ENV 50204:1995, 10 V/m
Cold: IEC 60068-2-1 [IEC 68-2-1]:1990, EN 60068-2-1:1993,
Test Ad, 16 hours at –40ºC
Dry Heat: IEC 60068-2-2 [IEC 68-2-2]:1974, EN 60068-2-2:1993, Test
Bd, 16 hours at +85ºC
Damp Heat, Cyclic: IEC 60068-2-30 [IEC 68-2-30]:1980, Test Db, 25° to 55ºC,
6 cycles, 95% humidity
Dielectric Strength: IEC 60255-5 [IEC 255-5]:1977 and IEEE C37.90-1989
2500 Vac on analogs, contact inputs, and contact outputs; 3100
Vdc on power supply; 2200 Vdc on EIA-485 communications
port
Impulse: IEC 60255-5 [IEC 255-5]:1977, 0.5 J, 5000 V
Vibration: IEC 60255-21-1 [IEC 255-21-1]:1988, Class 1
Shock and Bump: IEC 60255-21-2 [IEC 255-21-2]:1988, Class 1
Seismic: IEC 60255-21-3 [IEC 255-21-3]:1993, Class 2
1 MHz Burst Disturbance: IEC 60255-22-1 [IEC 255-22-1]:1988, Class 3
Electrostatic Discharge: IEC 60255-22-2 [IEC 255-22-2]:1996,
IEC 61000-4-2 [IEC 1000-4-2]:1995,
Level 4
Radiated Radio Frequency: IEC 60255-22-3 [IEC 255-22-3]:1989,
ENV 50140:1993,
IEEE C37.90.2-1995,
35 V/m, no keying test,
frequency element accurate to 0.1 Hz
Fast Transient Disturbance: IEC 60255-22-4 [IEC 255-22-4]:1992,
IEC 61000-4-4 [IEC 1000-4-4]:1995
Level 4

1-8 Introduction and Specifications Date Code 20080110
SEL-387E Instruction Manual
Object Penetration: IEC 60529 [IEC 529]:1989, IP30
Protection Against
Dust and Splashing Water: IEC 60529 [IEC 529]:1989, IP54 from the front panel using
the optional SEL-9103
Surge Withstand Capability: IEEE C37.90.1-1989, 3000 V oscillatory, 5000 V fast transient
Note: * = Terminal Block version only.
Certifications: ISO: Relay is designed and manufactured using ISO-9001 certified quality program.
UL Listed
CSA Certified
Sampling: 64 samples per power system cycle
Processing: Differential elements, optoisolated inputs, and contact outputs are processed at 1/8-cycle.
Overcurrent elements are processed at 1/8-cycle.
Metering Accuracy
Accuracy Range:
5 A Model
Phase Currents: ±1.5% ±0.10 A and ±1.5°
Sequence Currents: ±3.0% ±0.10 A and ±2.0°
Differential Quantities: ±5.0% ±0.10 A
2nd and 5th Harmonic: ±5.0% ±0.10 A
Current Harmonics: ±5.0% ±0.10 A
1 A Model
Phase Currents: ±1.5% ±0.02 A and ±1.5°
Sequence Currents: ±3.0% ±0.02 A and ±2.0°
Differential Quantities: ±5.0% ±0.02 A
2nd and 5th Harmonic: ±5.0% ±0.02 A
Current Harmonics: ±5.0% ±0.02 A
Phase Voltages: ±1.5% ±0.10 V and ±1.5°
Sequence Voltages: ±3.0% ±0.10 V and ±2.0°
Power Quantities: ±3.0% and ±3.0° for balanced currents and voltages
Station DC Battery Monitor
Pickup Range: 20–300 Vdc, 1 Vdc steps
Pickup Accuracy: ±2.0% ±2 Vdc
Differential Element
Unrestrained
Pickup Range: 1–20 in per unit of tap
Restrained
Pickup Range: 0.1–1.0 in per unit of tap
Pickup Accuracy (A secondary)
5 A Model: ±5% ±0.10 A
1 A Model: ±5% ±0.02 A
Unrestrained Element Pickup Time
(Min/Typ/Max): 0.8/1.0/1.9 cycles
Restrained Element (with harmonic blocking)
Pickup Time
(Min/Typ/Max): 1.5/1.6/2.2 cycles
Restrained Element (with harmonic restraint)
Pickup Time
(Min/Typ/Max): 2.62/2.72/2.86 cycles

Date Code 20080110 Introduction and Specifications 1-9
SEL-387E Instruction Manual
Harmonic Element
Pickup Range
(% of fundamental) 5–100%
Pickup Accuracy (A secondary)
5 A Model: ±5% ±0.10 A
1 A Model: ±5% ±0.02 A
Time Delay Accuracy: ±0.1% ±0.25 cycle
Instantaneous/Definite-Time Overcurrent Elements (Winding)
Pickup Range (A secondary)
5 A Model: 0.25–100.00 A
1 A Model: 0.05–20.00 A
Pickup Accuracy (A secondary)
5 A Model
Steady State: ±3% ±0.10 A
Transient: ±5% ±0.10 A
Transient for 50Q: ±6% ±0.10 A
1 A Model:
Steady State: ±3% ±0.02 A
Transient: ±5% ±0.02 A
Transient for 50Q: ±6% ±0.02 A
Pickup Time
(Typ/Max): 0.75/1.20 cycles
Time Delay Range: 0–16000 cycles
Time Delay Accuracy: ±0.1% ±0.25 cycle
Time Overcurrent Elements (Winding and Combined Current)
Pickup Range (A secondary)
5 A Model: 0.50–16.00 A
1 A Model: 0.10–3.20 A
Pickup Accuracy (A secondary)
5 A Model
Steady State: ±3% ±0.10 A
Transient: ±5% ±0.10 A
Transient for 50Q: ±6% ±0.10 A
1 A Model
Steady State: ±3% ±0.02 A
Transient: ±5% ±0.02 A
Transient for 50Q: ±6% ±0.02 A
Curve U1 = U.S. Moderately Inverse
U2 = U.S. Inverse
U3 = U.S. Very Inverse
U4 = U.S. Extremely Inverse
U5 = U.S. Short-Time Inverse
C1 = IEC Class A (Standard Inverse)
C2 = IEC Class B (Very Inverse)
C3 = IEC Class C (Extremely Inverse)
C4 = IEC Long-Time Inverse
C5 = IEC Short-Time Inverse
Time-Dial Range
US Curves: 0.50–15.00
IEC Curves: 0.05–1.00

1-10 Introduction and Specifications Date Code 20080110
SEL-387E Instruction Manual
Timing Accuracy: ±4% ±1.5 cycles for current between 2 and 30 multiples of pickup. Curves
operate on definite time for current greater than 30 multiples of pickup.
Note: For the combined current elements, 30 multiples of pickup is the sum of the currents in the two
windings.
Reset Characteristic: Induction-disk reset emulation or 1 cycle linear reset
Over-/Undervoltage Elements
Pickup Range: 0.00–300.00 V, 0.01 V steps
Steady-State Pickup
Accuracy: ±5% ±2 V
Transient Overreach: ±5% of pickup
Frequency Element
Pickup Range: 40.10–65.00 Hz, 0.01 Hz steps
Steady-State plus
Transient Overshoot: ±0.01 Hz
Time Delay: 0.04–300.00 s, 0.01 s steps
Timer Accuracy: ±0.1% ±0.0042 s
Frequency change
caused by temperature: Δf
sys
= f
sys
• (0.04 • 10
-6
) (T–25°C)
2
where T = temperature of relay via STATUS command
Volts/Hertz Element
Definite-Time Element
Pickup Range: 100–200%
Steady-State
Pickup Accuracy: ±1% of setpoint
Pickup Time: 25 ms @ 60 Hz (Max)
Time-Delay Range: 0.00–400.00 s
Time-Delay Accuracy: ±0.1% ±4.2 ms @ 60 Hz
Reset Time Range: 0.00–400.00 s
Inverse-Time Element
Pickup Range: 100–200%
Steady-State
Pickup Accuracy: ±1% of setpoint
Pickup Time: 25 ms @ 60 Hz (Max)
Curve: 0.5, 1.0, or 2.0
Factor: 0.1–10.0 s
Timing Accuracy: ±4% ±25 ms @ 60 Hz, for V/Hz above 1.05 multiples (Curve 0.5 and 1.0) or
1.10 multiples (Curve 2.0) of pickup setting, and for operating times greater
than 4 s
Reset Time Range: 0.00–400.00 s
Composite-Time Element:
Combination of Definite-Time and Inverse-Time specifications
User-Definable Curve Element
Pickup Range: 100–200%
Steady-State
Pickup Accuracy: ±1% of setpoint
Pickup Time: 25 ms @ 60 Hz (Max)
Reset Time Range: 0.00–400.00 s

Date Code 20080110 Installation i
SEL-387E Instruction Manual
TABLE OF CONTENTS
SECTION 2: INSTALLATION ..............................................................2-1
Relay Mounting ............................................................................................................................2-1
Rack Mount...........................................................................................................................2-1
Panel Mount..........................................................................................................................2-1
Dimensions and Cutout.........................................................................................................2-2
Rear-Panel Connections................................................................................................................2-5
Terminal Block .....................................................................................................................2-5
Connectorized .......................................................................................................................2-5
Prewired Connectors ...................................................................................................2-10
Unwired Connectors ...................................................................................................2-10
Connections.........................................................................................................................2-10
Frame Ground .............................................................................................................2-10
Power Supply ..............................................................................................................2-11
Current Transformer Inputs ........................................................................................2-11
Potential Transformer Inputs ......................................................................................2-11
Optoisolated Inputs .....................................................................................................2-11
Output Contacts...........................................................................................................2-12
Communications Port..................................................................................................2-12
Clock Synchronization, IRIG-B..................................................................................2-13
Typical AC/DC Connection Diagrams.......................................................................................2-13
Circuit Board Configuration.......................................................................................................2-16
Accessing the Relay Circuit Boards ...................................................................................2-16
Main Board .........................................................................................................................2-17
Output Contact Jumpers..............................................................................................2-17
Second ALARM Contact Jumper ...............................................................................2-17
Password and Breaker Jumpers...................................................................................2-18
EIA-232 Serial Port Jumpers ......................................................................................2-18
Condition of Acceptability for North American Product Safety
Compliance..................................................................................................2-19
Other Jumpers .............................................................................................................2-19
Low-Level Analog Interface.......................................................................................2-19
Clock Battery ..............................................................................................................2-19
Additional Interface Board .................................................................................................2-20
Jumpers .......................................................................................................................2-20
Board Layout...............................................................................................................2-20
TABLES
Table 2.1: SEL-387E Relay Communication Cable Numbers ...............................................................2-13
Table 2.2: SEL-387E Relay Second ALARM Contact Jumper Position ...............................................2-18

ii Installation Date Code 20080110
SEL-387E Instruction Manual
FIGURES
Figure 2.1: Relay Dimensions and Panel-Mount Cutout..........................................................................2-2
Figure 2.2: Front-Panel Drawings–Models 0387Ex0xxxH and 0387Ex1xxxH.......................................2-3
Figure 2.3: Front-Panel Drawings–Models 0387Ex0xxx3 and 0387Ex1xxx3.........................................2-4
Figure 2.4: Rear Panel Drawings–Models 0387Ex0xxxxX and 0387Ex1xxxx2 .....................................2-6
Figure 2.5: Rear-Panel Drawings–Models 0387Ex1xxxx4 and 0387Ex1xxxx6......................................2-7
Figure 2.6: Rear-Panel Drawings–Models 0387ExYxxxx2 and 0387ExYxxxx6....................................2-8
Figure 2.7: SEL-387E Relay 3U Typical Rear-Panel Drawings Showing 10/100BASE-T and
100BASE FX Ethernet...................................................................................................2-9
Figure 2.8: Standard Independent Output Contact Representation ........................................................2-12
Figure 2.9: Example AC Connections (three-winding transformer; wye-connected voltages) .............2-14
Figure 2.10: Example AC Connections (three-winding transformer; open-delta-connected
voltages) .......................................................................................................................2-14
Figure 2.11: Example AC Connections (two-winding transformer; REF with LV compensated
earthing; wye-connected voltages) ..............................................................................2-15
Figure 2.12: Example AC Connections (two-winding transformer; HV REF; wye-connected
voltages) .......................................................................................................................2-15
Figure 2.13: Example DC Connections (basic version) .........................................................................2-16
Figure 2.14: Main Board Jumpers, Connections, and Battery Locations...............................................2-21
Figure 2.15: Interface Board 2 Component Layout (Conventional Terminal Block) ............................2-22
Figure 2.16: Interface Board 4 Component Layout (Conventional Terminal Block) ............................2-23
Figure 2.17: Interface Board 6 Component Layout (Conventional Terminal Block) ............................2-24
Figure 2.18: Interface Board 2 Component Layout (Connectorized).....................................................2-25
Figure 2.19: Interface Board 6 Component Layout (Connectorized).....................................................2-26

Date Code 20080110 Installation 2-1
SEL-387E Instruction Manual
SECTION 2: INSTALLATION
Design your installation using the mounting and connection information in this section. Options
include rack or panel mounting and terminal block or plug-in connector (Connectorized
®
) wiring.
This section also includes information on configuring the relay for your application.
R ELAY M OUNTING
Rack Mount
We offer the SEL-387E Relay in a rack-mount version that bolts easily into a standard 19-inch
rack. See Figure 2.1. From the front of the relay, insert four rack screws (two on each side)
through the holes on the relay mounting flanges.
Reverse the relay mounting flanges to cause the relay to project 2.75 inches (69.9 mm) from the
front of your mounting rack and provide additional space at the rear of the relay for applications
where the relay might otherwise be too deep to fit.
Panel Mount
We also offer the SEL-387E Relay in a panel-mount version for a clean look. Panel-mount
relays have sculpted front-panel molding that covers all installation holes. See Figure 2.1. Cut
your panel and drill mounting holes according to the dimensions in Figure 2.1. Insert the relay
into the cutout, aligning four relay mounting studs on the rear of the relay front panel with the
drilled holes in your panel, and use nuts to secure the relay to your panel.
The projection panel-mount option covers all installation holes and maintains the sculpted look
of the panel-mount option; the relay projects 2.75 inches (69.9 mm) from the front of your panel.
This ordering option increases space at the rear of the relay for applications where the relay
would ordinarily be too deep to fit your cabinet.

2-2 Installation Date Code 20080110
SEL-387E Instruction Manual
Dimensions and Cutout
Figure 2.1: Relay Dimensions and Panel-Mount Cutout