SEL-387L Data Sheet

SEL-387L Data Sheet
SEL-387L Line Current
Differential Relay
Zero Settings Relay
Install the relay, select the communication addresses, and the SEL-387L is ready to protect transmission lines
and cables of any voltage.
Ia, Ib, Ic
Major Features and Benefits
➤
➤
➤
➤
➤
Zero Settings. Proven differential protection requires no settings for complete phase and ground fault
protection.
Fast. Subcycle operation for severe faults with security for CT saturation.
Sensitive. Negative- and zero-sequence differential elements detect high-resistance ground faults
while remaining secure for external faults.
Secure. Alpha plane restraint principle provides security for CT saturation and channel asymmetry.
Complete. Select models with direct fiber interface or IEEE C37.94 synchronous optical interface.
Channel monitoring provides measurement of communication quality and prevents misoperation due
to channel failure.
Schweitzer Engineering Laboratories, Inc.
SEL-387L Data Sheet
2
Functional Overview
Bus
SEL-387L Relay
87LA 87LB 87LC
• One Fiber-Optic
Communications Channel
87LG 87L2
• Complete Communications
Channel Monitoring and Reporting
3
Breaker
• Proven Phase, Negative-, and
Zero-Sequence Differential Protection
• Preconfigured Contact I/O
52
Communications
to remote relay
• Comprehensive Metering
• ACSELERATOR® SEL-5030 Software
• Event Reports With Oscillography
• Sequential Events Recorder
Line
• DNP3 Level 2 Slave Protocol*
* optional
Figure 1
Functional Diagram
Application Examples
Simple Two-Terminal
Line Protection
Connect the current transformers and the preprogrammed TRIP contacts, select the channel transmit and
receive address, and the SEL-387L is ready to protect
virtually any two-terminal transmission line. In this configuration, the relay detects internal high resistance
ground faults as great as 133 ohms secondary (5 A relay,
nominal voltage 66.4 V secondary) and trips for most
bolted faults in less than one cycle.
which protects the line and sends a high-speed transfer
trip signal to the SEL-387L with less than one-half-cycle
tripping delay. Make required settings adjustments in the
SEL-311L. The overall protection scheme inherits the
SEL-311L settings.
Utility-Owned
Station
Factory
Currents
SEL-387L
Trip
SEL-311L
Figure 3 SEL-387L/SEL-311L Provide More Application
Flexibility
SEL-387L
Figure 2
SEL-387L
Simple Two-Terminal Differential Protection
Advanced Two-Terminal
Line Protection
Connect the SEL-387L to the SEL-311L Relay for more
challenging applications and to accommodate unequal
current transformer ratios as shown in Figure 3. This
connection is also useful for applications with an industrial owned substation at one end of a line. All settings
are made at the SEL-311L. The SEL-387L acts as a
remote data acquisition terminal for the SEL-311L,
SEL-387L Data Sheet
The SEL-387L and the SEL-311L work together to
simplify and secure industrial feeder and cogeneration
intertie protection. You set and control the SEL-311L,
and it performs all line protection, so you know
protection is not compromised by settings errors in the
remote SEL-387L (patent pending).
Multiplexed Communications
Channel
Use the SEL-387L for secure differential protection with
multiplexed communications. With no settings, the relay
accommodates channel asymmetry and communication
delays without compromising security or dependability.
Schweitzer Engineering Laboratories, Inc.
3
Three-Terminal Line Protection
SEL-387L
Direct Fiber
IEEE C37.94
Compliant
Channel Card
Protect three-terminal lines using two SEL-387L relays
and one SEL-311L (Figure 6). No settings are needed for
SEL-387L relays. They detect a transmitted bit from the
SEL-311L and switch to a “follower” mode with the
SEL-311L as the “leader.” The SEL-311L performs all
the measurements and sends a transfer trip signal to the
two SEL-387L relays.
Station S
Station R
52
52
Multiplexer
Communications Network
Figure 4 Connect the SEL-387L Directly to Any
Multiplexer System That Incorporates an IEEE C37.94
Compliant Channel Card
SEL-387L CHX
Follower
CHX SEL-387L
Follower
Currents
Currents
52
Trip
Trip
SEL-311L
SEL-387L
CHX CHY
Leader
Station T
Figure 6 Use Two SEL-387L Relay and One SEL-311L
Relays for Three-Terminal Line Protection
Direct Fiber
SEL-3094
Electrical
Interface
EIA-422
or G.703
Channel Card
Multiplexer
Communications Network
Figure 5 Use the SEL-3094 Protocol Converter to
Connect the SEL-387L to Multiplexers Using EIA-422 or
G.703 Input Channel Cards
Figure 7
While the SEL-387L is simple to use, it is also flexible.
Preprogrammed TRIP and CLOSE inputs allow safe, simple
local breaker control through latching TRIP and CLOSE
outputs. Further simplify the dc system connections by
eliminating trip and close seal-in relays. The high-speed
TRIP and CLOSE contacts used in the SEL-387L safely
interrupt trip and close current up to 10 A.
Two secure, high-speed transfer contacts and several
serial communications protocols allow remote control
operations, or remote contact status indication. Assert
input T1 or T2 in the local SEL-387L and output R1 or R2
closes less than 10 ms later in the remote relay. The
transfer contacts are secure enough for direct tripping
and closing operations per IEC-60834-1. Figure 7 shows
the contact I/O available on the SEL-387L rear panel.
SEL-387L Contact I/O
Schweitzer Engineering Laboratories, Inc.
SEL-387L Data Sheet
4
Protection Features
RF
(Ω sec.)
150
87LA, 87LB, 87LC Trip Speed
Figure 9
50
1/3
2/3
Load Current (Per Unit of Nominal)
Maximum
Minimum
2.5
2.0
1.5
1.0
0.5
0.0
0.0
100
Figure 8
Fast, secure phase elements, 87LA, 87LB, and 87LC,
detect bolted phase faults that produce more than
1.2 • INOM of difference current. Figure 9 shows the
operate time, including high-speed outputs, for a 5 A
nominal relay.
Trip Time (Cycles)
The SEL-387L employs sensitive and secure unbalance
elements, 87L2 and 87LG, to detect high-resistance
ground faults that produce more than 10 percent INOM
difference current. Figure 8 shows the ground fault resistance coverage as a function of load current for a 5 A
nominal relay. To ensure that the unbalance elements do
not operate on charging current unbalance during external ground faults on longer lines and cables, select equal
CT ratios at both line terminals so line charging current
is less than 10 percent of INOM.
6.0
12.0
18.0 24.0 30.0 36.0 42.0 48.0 54.0 60.0
Difference Current (Amps)
Current Differential Element Trip Times
1
Ground Fault Sensitivity
Line Current Differential Communications
The SEL-387L is available with the following fiber-optic
current differential communications interfaces:
➤ IEEE C37.94 compliant multimode fiber-optic
interface
➤ 1300 nm multimode or single-mode interface
➤ 1550 nm single-mode fiber-optic interface
The IEEE C37.94 compliant multimode fiber-optic
interface is included at no extra charge. This interface
connects directly between the relay and any compliant
multiplexer with no wires and no confusing timing or
clock edge settings.
Relay
Building
Optical
Fiber Link
SEL-387L
Multiplexer
Communicates
Currents
Figure 10
Communications
Building
Use fiber optics between the relay and multiplexer to
prevent communication errors, equipment damage, and
hazardous conditions due to ground potential rise, as
shown in Figure 10.
Use the SEL-3094 to convert the relay fiber interface into
a standard electrical interface to connect to multiplexers
that do not support the IEEE C37.94 standard.
Choose the 1300 nm multimode or single-mode interface
for direct fiber applications up to 80 km. The
1550 nm single-mode fiber-optic interface supports
direct fiber connections up to 120 km.
The relay continuously monitors communications for
correct data transmission and channel delay. Channel
quality reports, shown in Figure 11, include short- and
long-term unavailability, and round trip channel delay.
Use this information to accurately assess protection and
communications system reliability and make appropriate
changes for maximum system reliability.
IEEE C37.94
SEL-387L Data Sheet
Schweitzer Engineering Laboratories, Inc.
5
=>>COMM X L <Enter>
SEL-387L Date: 2003/05/26 Time: 09:27:03.269
EXAMPLE: BUS B, BREAKER 3
FID=SEL-387L-R100-V0-Z001001-D20030625
CID=BAFD
Summary for 87L Channel X
Channel Status Alarms
ROKX = 1
DBADX = 0
RBADX = 0
AVAX = 0
For 2003/05/24 13:37:01.631 to 2003/05/26 09:27:04.248
COMMUNICATION LOG SUMMARY
COMMUNICATION STATISTICS
# of Error records 29
Last error
Data Error
Data Error
20
Longest failure
4.685 sec.
Dropout
9
Lost Packets, prev. 24 hours
407
Test Mode Entered
0
One Way Delay (Ping-Pong)
0.4 msec.
Error
Recovery
#
Date
Time
Date
Time
Duration Cause
1 2003/05/26 09:23:54.041 2003/05/26 09:23:54.042
0.001 Data Error
2 2003/05/26 09:23:53.888 2003/05/26 09:23:54.040
0.152 Dropout Error
3 2003/05/26 09:23:53.885 2003/05/26 09:23:53.888
0.003 Data Error
4 2003/05/26 09:23:53.882 2003/05/26 09:23:53.885
0.003 Dropout Error
.
.
.
27 2003/05/24 13:37:04.688 2003/05/24 13:37:04.689
0.001 Data Error
28 2003/05/24 13:37:00.003 2003/05/24 13:37:04.688
4.685 Dropout Error
29 2003/05/24 13:37:00.000 2003/05/24 13:37:00.003
0.003 Data Error
=>>
Figure 11
COMM Command Report
The communications monitor reports performance of the 87L channel. Review this report to optimize communications.
Automation
Control and Integration Features
The SEL-387L is fully compatible with the entire family
of SEL communications processors. Use the SEL-2032,
SEL-2030, and SEL-2020 Communications Processors
to automatically retrieve, store, and parse reports from
the SEL-387L. The communications processor also time
synchronizes all of the connected relays and allows password protected engineering access to the relays from a
dedicated or dial-up connection, or over the enterprise
LAN via the SEL-2701 Ethernet Processor. All of these
functions are supported simultaneously over a single
connection to each relay (see Figure 12).
Serial Communications
Ethernet Link
Dial-Up ASCII Link
DNP SCADA Link
SEL-2701
SEL Communications Processor
ASCII Reports Plus
Interleaved Binary Data
SEL-387L
SEL-311C
SEL-311L
Figure 12
SEL-321
Example Communication System
SEL-387L integration capabilities include:
➤ Three EIA-232 serial ports and one isolated
EIA-485 serial port.
➤ Full access to event history, relay status, and meter
information from the serial ports.
➤ DNP3 Level 2 protocol with point mapping
(optional).
➤ Open communications protocols including Simple
ASCII, Compressed ASCII, Extended Fast Meter,
Fast Operate, and Fast SER.
Schweitzer Engineering Laboratories, Inc.
SEL-387L Data Sheet
6
Monitoring, Metering, and Event Reporting
The relay provides accurate and extensive metering
including:
➤ Local, remote, and difference currents: IA, B, C, I1,
3I2, 3I0
➤ Power system frequency
➤ DC battery voltage
Local Currents
Remote Currents
Use the current differential meter to verify line charging
current. Compare local and remote currents to detect CT
connection errors at any terminal.
Forty event reports store 10 seconds of oscillographic
data. Each event report contains 15 cycles (4-cycle
prefault, 11-cycle postfault) of local, remote, and
difference currents for all three phases, battery voltage,
and system frequency at 16 samples per cycle, as well as
every logic point in the relay (the entire Relay Word). A
Sequential Events Recorder stores 512 of the most recent
time-tagged transitions of over 30 key logic points. All
40 event records and 512 sequential events records are
retained even if power is removed from the relay.
Difference Currents
Figure 13
QuickSet
SEL-387L Oscillography via
ACSELERATOR
Oscillographic event records and sequential events
records help you understand and reconstruct complex
system disturbances. All of these advanced features are
supported by ACSELERATOR QuickSet® SEL-5030
Software (see Figure 13). The features and the software
are included with the SEL-387L at no additional cost.
Front-Panel User Interface
Figure 15 shows a close-up view of the user interface
portion of the SEL-387L front panel. It includes a
two-line, 16-character LCD, 16 LED status and target
indicators, and eight pushbuttons for local access.
Table 1 explains the front-panel LEDs.
The LCD shows event, metering, and relay self-test
status information. The LCD is controlled by the
pushbuttons and automatic messages the relay generates.
The default display scrolls through key system
parameters including local and remote A-, B-, and Cphase currents, breaker status, and 87 communications
channel status. The relay displays two lines of text every
five seconds as shown in Figure 14.
IA = 3.01 IB = 2.98
IC = 2.99 LOCAL
IA = 3.02 IB = 3.01
IC = 2.99 REMOTE
Table 1
Description of Target LEDs
Target LED
Function
EN
Relay powered properly and self-tests okay
TRIP
Indication that a trip occurred
52 OPEN
LOC
REM
Local breaker open
Remote breaker open
T1, T2
Transfer contact inputs
T1 or T2 are energized
ADDR ERR
Current differential receive address error
TEST
Current differential test mode enabled
FAULT TYPE
A, B, C
G
Phase(s) involved in fault
Ground involved in fault
R1, R2
Transfer contact outputs
R1 or R2 are energized
87DIS
Current differential protection disabled
87CH FAIL
Current differential channel problem
BREAKER CLOSED
87L BLOCKED
Figure 14
SEL-387L Default Front-Panel Display
SEL-387L Data Sheet
Schweitzer Engineering Laboratories, Inc.
7
Figure 15
Status and Trip Target LEDs, Front-Panel Display, and Pushbuttons
Guideform Specification
The microprocessor-based relay shall provide a combination of functions including protection, monitoring,
metering, oscillography, control, and automation. Relay
self-checking functions shall be included. Specific
requirements follow:
➤ Current Differential Protection. The relay shall
compare local and remote phase and sequence currents to provide operation in less than one cycle for
bolted faults. The relay shall operate for unbalanced faults with currents below line charging current. Distortion caused by CT saturation at one or
both ends shall not cause misoperation.
➤ Zero Settings. The relay shall require no settings
to provide current differential protection.
➤ Transfer Trips. The relay shall accept transfer
trips from the remote relay with less than one-halfcycle delay.
➤ Transfer Contacts. The relay shall include two
transfer contacts. Delay from energizing the local
input to closing the remote output shall be less than
10 ms. Both transfer contacts shall have direct tripping security per IEC 60834-1.
➤ Output Contacts. The relay shall include two
types of preprogrammed outputs. Metallic contacts
shall be rated per IEEE C37.90. High-speed highcurrent interrupting contacts shall make in less
than 10 microseconds and shall interrupt up to
10 A of trip or close current without damage to the
contact.
➤ Remote Terminal. The relay shall be capable of
acting as a remote data acquisition terminal for a
traditional current differential relay with flexible
settings. Protection parameters shall be determined
exclusively by settings in the traditional current
differential relay.
➤ Channel Requirements. The relay shall have
options for a single- or multimode fiber-optic interface. The relay shall accommodate up to 5 ms of
channel asymmetry.
Schweitzer Engineering Laboratories, Inc.
➤ Event
➤
➤
➤
➤
➤
➤
➤
Reporting and Sequential Events
Recorder. The relay shall be capable of automatically recording and storing up to 10 seconds of
oscillography. Each oscillographic report shall
contain 15 cycles containing local and remote currents, system frequency, dc system voltage, and
all relevant logic points. The relay shall also
include a Sequential Events Recorder (SER) that
stores the latest 512 entries. Oscillographic and
SER reports shall be stored in nonvolatile memory,
and shall be retrieved in either human or machine
readable formats.
Status and Trip Target LEDs. The relay shall
include 16 status and trip target LEDs.
Substation Battery Monitor. The relay shall measure and report the substation battery voltage presented to the relay power supply terminals. Voltage
level at the time of tripping shall be monitored and
recorded.
Automation. The relay shall control and monitor
breaker status via a local HMI and remote communications.
Terminal Communications. The relay shall allow
communications from any ASCII terminal without
special PC software.
Serial Communications. The relay shall include
three independent EIA-232 and one EIA-485 serial
ports for external communications. All ports shall
allow simultaneous execution of integration and
engineering access protocols.
IRIG-B. The relay shall include an interface port
for a demodulated IRIG-B time synchronization
input signal. The line current differential protection
shall not rely on this or any other external time
synchronization.
Environmental Capabilities. The relay shall be
capable of continuous operation over a temperature
range of –40 to +85 C.
SEL-387L Data Sheet
8
Wiring Diagram
A17
52A
TRIP
A02
A18
A19
TRIP
TRIP
OPTOISOLATED INPUTS
CLOSE
A22
A23
87
DIS
A24
A25
JUMPER CONFIGURABLE OUTPUT CONTACTS
A20
A21
T1
A26
A27
A01
T2
A28
A03
A04
CLOSE
A05
A06
CLOSE
A07
A08
R1
A09
A10
R2
A11
A12
87FAIL
A13
A14
IA
Z02
IB
Z03
Z04
IC
Z05
ALARM
CURRENT INPUTS
Z01
A15
A16
Optical fiber differential channel
TX
RX
CHANNEL X
PORT 1
(REAR)
IRIG-B
+ —
ISOLATED
EIA-485
1
2
3
4
5 6 7
EIA-232 & IRIG-B
PORT 2 (REAR)
DB9
EIA-232
PORT 3 (REAR)
DB9
EIA-232
PORT F (FRONT)
Z25
TRIP
B01
B02
TRIP
B04
B05
CLOSE
B07
B08
CLOSE
B09
B10
R1
B12
B13
R2
B15
B16
DB9
POWER
SUPPLY
Z26
8
HIGH-SPEED/HIGH-CURRENT INTERRUPTING CONTACTS
Z06
FRONT-PANEL TARGET LEDS
BATTERY
MONITOR
CHASSIS
GROUND
Z27
Figure 16
SEL-387L Inputs, Outputs, and Communications Ports
SEL-387L Data Sheet
Schweitzer Engineering Laboratories, Inc.
9
Mechanical Diagrams
Rack-Mount Front Panel
Panel-Mount Front Panel
Panel-Mount Vertical Front Panel
Figure 17
SEL-387L Front-Panel Diagrams
Schweitzer Engineering Laboratories, Inc.
SEL-387L Data Sheet
10
Figure 18
SEL-387L Rear-Panel Diagram
Relay Dimensions
Figure 19
SEL-387L Dimensions for Rack- and Panel-Mount Models
(Horizontal mounting shown; dimensions also apply to vertical mounting.)
SEL-387L Data Sheet
Schweitzer Engineering Laboratories, Inc.
11
Specifications
Compliance
Designed and manufactured under an ISO 9001 certified quality
management system
UL Listed to U.S. and Canadian safety standards (File E212775;
NRGU, NRGU7)
CE Mark
Class 1 Laser Product
Pickup Time:
<10 µs
Dropout Time:
<8 ms, typical
Breaking Capacity (10,000 operations):
48 V
125 V
250 V
10 A
10 A
10 A
L/R = 40 ms
L/R = 40 ms
L/R = 20 ms
Cyclic Capacity (4 interruptions/second, followed by 2 minutes idle
for thermal dissipation):
General
AC Current Inputs
5 A nominal:
15 A continuous;
linear to 100 A symmetrical
500 A for 1 second
1250 A for 1 cycle
Burden:
1 A nominal:
Pickup 200–300 Vdc; Dropout 150 Vdc
Pickup 176–264 Vdc; Dropout 132 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 15–30 Vdc
1.31 VA @ 3 A
Power Supply
125/250 Vdc or Vac
85–350 Vdc or 85–264 Vac
48/125 Vdc or 125 Vac
Range:
Optoisolated Input Ratings
220 Vdc:
0.13 VA @ 1 A
Rated:
Note: Make per IEEE C37.90-1989; Breaking and Cyclic Capacity per
IEC 60255-23:1994.
250 Vdc:
250 A for 1 cycle
Range:
Note: 24, 48, 125, 220, and 250 Vdc optoisolated inputs draw
approximately 5 mA of current; 110 Vdc inputs draw approximately
8 mA of current. All current ratings are at nominal input voltages.
Frequency and Rotation
System Frequency:
50 or 60 Hz
Phase Rotation:
ABC (interchange two phases
on both relays for ACB rotation)
Frequency
Tracking Range:
40.1–65 Hz
38–140 Vdc or 85–140 Vac
Rated:
L/R = 40 ms
L/R = 40 ms
L/R = 20 ms
2.51 VA @ 15 A
100 A for 1 second
Rated:
10 A
10 A
10 A
0.27 VA @ 5 A
3 A continuous;
linear to 20 A symmetrical
Burden:
48 V
125 V
250 V
24/48 Vdc
Range:
18–60 Vdc polarity dependent
Burden:
<25 W
Output Contacts
Serial Communications Ports
Port 1:
EIA-485
Baud rate:
9600 without DNP3
300–19200 with DNP3
Standard
Make:
30 A
Carry:
6 A continuous @ 70°C;
4 A continuous @ 85°C
1 s Rating:
50 A
MOV Protected:
270 Vac, 360 Vdc, 40 J
Pickup Time:
<5 ms
Breaking Capacity (10,000 operations):
48 V
125 V
250 V
0.5 A
0.3 A
0.2 A
L/R = 40 ms
L/R = 40 ms
L/R = 40 ms
Cyclic Capacity (2.5 cycles/second):
48 V
125 V
250 V
0.5 A
0.3 A
0.2 A
L/R = 40 ms
L/R = 40 ms
L/R = 40 ms
High-Speed High-Current Interruption
Port 2–3:
EIA-232
Baud rate:
Port 4 (Front Port):
19200 without DNP3
300–38400 with DNP3
EIA-232
Baud rate:
9600 without DNP3
300–38400 with DNP3
Differential Communications Ports
Fiber Optics—ST connector
1550 nm single mode direct fiber
1300 nm multimode or single mode
Tx Power:
–18 dBm
Rx Min. Sensitivity:
–58 dBm
System Gain:
40 dB
850 nm multimode, C37.94 (for connection to a digital multiplexer
or for direct connection to an SEL-311L, but not for direct
connection to another SEL-387L)
Make:
30 A
Carry:
6 A continuous @ 70°C;
4 A continuous @ 85°C
Tx Power:
–23 dBm
–19 dBm
1 s Rating:
50 A
Rx Min. Sensitivity:
–32 dBm
–32 dBm
MOV Protected:
330 Vdc, 130 J
System Gain:
Schweitzer Engineering Laboratories, Inc.
50 µm
9 dB
62.5 µm
13 dB
SEL-387L Data Sheet
12
Electrical:
Use the SEL-3094 for
EIA-422 or CCITT G.703
synchronous interfaces to multiplexers.
Metering Accuracy
Radiated Radio
Frequency:
IEC 60255-22-3:1989, 10 V/m;
IEEE C37.90.2, 35 V/m;
IEC 61000-4-3, 10 V/m
Surge Withstand:
IEEE C37.90.1-1989,
3000 V oscillatory, 5000 V transient
IEEE C37.90.1-2002,
2500 V oscillatory, 4000 V fast transient
1 MHz Burst
Disturbance:
IEC 60255-22-1:1988,
Severity Level 3 (2500 V common
and 1000 V differential mode)
Currents IA, IB, IC
Local
5 A nominal:
±0.05 A secondary
1 A nominal:
±0.01 A secondary
Remote:
±3%
Total:
±3%
Environmental
Cold:
IEC 60068-2-1:1990,
Test Ad; 16 hr. @ –40°C
Dry Heat:
IEC 60068-2-2:1974,
Test Bd; 16 hr. @ +85°C
Damp Heat, Cyclic:
IEC 60068-2-30:1980,
Test Db; 55°C, 6 cycles, 95% humidity
Object Penetration:
IEC 60529:1989, IP30
Sinusoidal Vibration:
IEC 60255-21-1:1988
Vibration Endurance, Class 1
Vibration Response, Class 2
Shock and Bump:
IEC 60255-21-2:1988
Bump Test, Class 1
Shock Withstand, Class 1
Shock Response, Class 2
Seismic:
IEC 60255-21-3:1993, Class 2
Currents 3I2, 3I0, I1
Local and Remote
5 A nominal:
±0.05 A secondary and ±5%
1 A nominal:
±0.01 A secondary and ±5%
Total:
±3%
Substation Battery Voltage Monitor
Range:
20–300 Vdc
Accuracy:
±2%, ±2 Vdc
Time-Code Input
Relay accepts demodulated IRIG-B time-code input at Port 1 or 2.
Relay time is synchronized to within ±5 ms of time source input.
Current differential protection does not require external time source.
Terminal Connections
Safety
Dielectric Strength:
IEC 60255-5:1977; IEEE C37.90-1989
2500 Vac (rms) for 1 minute on
analog inputs, optoisolated inputs,
and output contacts; 3100 Vdc for
1 minute on power supply.
Impulse:
IEC 60255-5:1977, 0.5 J, 5000 V
Laser Safety:
IEC 60825-1:1993; 21 CFR 1040.10;
ANSI Z136.1-1993; ANSI Z136.2-1988,
eye-safe Class 1 laser product
Rear Screw-Terminal Tightening Torque:
Minimum:
9-in-lb (1.1 Nm)
Maximum:
12-in-lb (1.3 Nm)
Terminals or stranded copper wire. Ring terminals are recommended.
Minimum temperature rating of 105°C.
Operating Temperature Range
–40 to +85C (–40 to +185F)
Relay Element Accuracies
Line Current Differential (87L) Elements
Note: LCD contrast impaired for temperatures below –20°C.
Phase, NegativeSequence, and ZeroSequence Accuracy:
Relay Weight
7.24 kg (16 lbs)
Restraint Characteristic
Accuracy:
Type Tests
±3% ±0.01 INOM
±5% of 6
±3° of 195°
Electromagnetic Compatibility Immunity
Electrostatic Discharge:
IEC 60255-22-2:1996,
IEC 61000-4-2,
IEEE C37.90.3 Severity Level 4
(8000 V contact, 15,000 V air)
Fast Transient
Disturbance:
IEC 60255-22-4:1992;
IEC 61000-4-4:1995,
4 kV @ 2.5 kHz (4000 V on power
supply, 2000 V on inputs and outputs)
© 2003–2016 by Schweitzer Engineering Laboratories, Inc. All rights reserved.
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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.
2350 NE Hopkins Court • Pullman, WA 99163-5603 U.S.A.
Tel: +1.509.332.1890 • Fax: +1.509.332.7990
www.selinc.com • info@selinc.com
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
www.selinc.com or contact your customer service representative.
SEL-387L Data Sheet
*PDS387L-01*
Date Code 20160122
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