Sel SEL-487E-3 User manual

Schweitzer Engineering Laboratories, Inc. SEL-487E-3, -4 Data Sheet
Three-Phase Transformer Protection,
Automation, and Control System
Key Features and Benefits
The SEL-487E Transformer Protection Relay provides three-phase differential protection for transformer applications
with as many as six three-phase restraint current inputs. A second three-phase differential element is also supported for
busbar protection.
➤High-Speed Differential Protection. A two-stage slope adapts automatically to external fault conditions, providing
fast, sensitive, dependable, and secure differential protection, even for CT saturation and heavily distorted waveforms.
Two independent differential zones are available, one of which supports additional features that accommodate
transformer differential protection.
➤Inrush and Overexcitation Detection. Combined harmonic blocking and restraint features provide maximum
security during transformer magnetizing inrush conditions. Waveshape-based inrush detection addresses inrush
conditions that contain low second and fourth harmonic content.
➤Turn-to-Turn Winding Fault Protection. Innovative negative-sequence differential elements provide transformer
windings protection from as little as two percent turn-to-turn winding faults.
➤Restricted Earth Fault Protection. Three independent REF elements provide sensitive protection for faults close
to the winding neutral in grounded wye-connected transformers.
SEL-487E-3, -4 Transformer
Protection Relay

SEL-487E-3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
2
➤Combined Overcurrent. Configurations exist for a wide variety of transformer applications. Use the combined
overcurrent elements for transformers connected to ring-bus or breaker and one-half systems. This feature
mathematically sums two terminal current inputs to form a single operating quantity.
➤Distance Protection. Mho or quadrilateral characteristics protect transformers and transmission lines with four
zones of phase distance and ground distance elements. Line harmonic blocking, load-encroachment, coupling
capacitor voltage transformer (CCVT) detection, and out-of-step blocking logic add security to your distance
protection scheme.
➤Transformer and Feeder Backup Protection. Adaptive time-overcurrent elements with selectable operating
quantity, programmable pickup, and time-delay settings provide transformer and feeder backup protection.
➤Reclosing Control. You can incorporate programmable three-pole trip and reclose of as many as six independent
breakers into an integrated substation control system.
➤Reverse Power Flow and Overload Condition Protection. The SEL-487E directional real- and reactive-power
elements guard against reverse power flow and overload conditions.
➤Synchronism Check. Synchronism check can prevent circuit breakers from closing if the corresponding phases
across the open circuit breaker are excessively out of phase, magnitude, or frequency. The synchronism-check
function has a user-selectable synchronizing voltage source and incorporates slip frequency, two levels of maximum
angle difference, and breaker close time into the closing decision.
➤Input/Output Scaling. The SEL-2600 RTD Module provides as many as 12 temperature inputs, and the
SEL-2505/SEL-2506 Remote I/O Modules provide a scalable number of discrete I/O points.
➤Two CT Input Levels. Selectable 1 A or 5 A nominal secondary input levels are available for any three-phase
winding input.
➤Large CT Mismatch Ratio. The relay can accommodate CT ratio mismatch as great as 35:1.
➤Breaker Failure. High-speed (less than one cycle) open-pole detection logic reduces coordination times for critical
breaker failure applications. Apply the relay to supply breaker failure protection for all supported breakers. Logic
for breaker failure retrip and initiation of transfer tripping is included.
➤IEC 60255-149 Compliant Thermal Model. The relay can provide a configurable thermal model for the protection
of a wide variety of devices. This function can activate a control action or issue an alarm or trip when equipment
overheats as a result of adverse operation conditions. A separate resistance temperature detector (RTD) module is
required for this application.
➤Ethernet Access. The optional Ethernet card grants access to all relay functions. Use IEC 61850 Manufacturing
Message Specification (MMS) or DNP3 protocol directly to interconnect with automation systems. You can also
connect to DNP3 networks through a communications processor. Use File Transfer Protocol (FTP) for high-speed data
collection. Connect to substation or corporate LANs to transmit synchrophasors by using TCP or UDP internet protocols.
➤Serial Data Communication. The relay can communicate serial data through SEL ASCII, SEL Fast Message,
SEL Fast Operate, MIRRORED BITS®, and DNP3 protocols. Synchrophasor data are provided in either SEL Fast
Message or IEEE C37.118 format.
➤Automation. The enhanced automation features include programmable elements for local control, remote control,
protection latching, and automation latching. Local metering on the large front-panel LCD eliminates the need for
separate panel meters. Serial and Ethernet links efficiently transmit key information, including metering data, protection
element and control I/O status, synchrophasor data, IEC 61850 Edition 2 GOOSE messages, Sequential Events
Recorder (SER) reports, breaker monitoring, relay summary event reports, and time synchronization. Apply expanded
SELOGIC®control equations with math and comparison functions in control applications. Incorporate as many as
1000 lines of automation logic to accelerate and improve control actions.
➤Synchrophasors. You can make informed load dispatch decisions based on actual real-time phasor measurements
from relays across your power system. Record streaming synchrophasor data from the relay for system-wide disturbance
recording. Control the power system by using local and remote synchrophasor data.
➤Breaker and Battery Monitoring. You can schedule breaker maintenance when accumulated breaker duty
(independently monitored for each pole) indicates possible excess contact wear. The relay records electrical and
mechanical operating times for both the last operation and the average of operations since function reset. Alarm
contacts provide notification of substation battery voltage problems (as many as two independent battery monitors
in some SEL-400 series relays) even if voltage is low only during trip or close operations.
➤Six Independent Settings Groups. The relay includes group logic to adjust settings for different operating conditions,
such as station maintenance, seasonal operations, emergency contingencies, loading, source changes, and adjacent
relay settings changes. Select the active group settings by control input, command, or other programmable conditions.

Schweitzer Engineering Laboratories, Inc. SEL-487E-3, -4 Data Sheet
3
➤Software-Invertible Polarities. Inverting individual or grouped CT and PT polarities allows you to account for
field wiring or zones of protection changes. CEV files and all metering and protection logic use the inverted polarities,
whereas COMTRADE event reports do not use inverted polarities but rather record signals as applied to the relay.
➤Parallel Redundancy Protocol (PRP). PRP provides seamless recovery from any single Ethernet network failure.
The Ethernet network and all traffic are fully duplicated with both copies operating in parallel.
➤IEC 61850 Operating Modes. The relay supports IEC 61850 standard operating modes such as Test, Blocked,
On, and Off.
➤IEEE 1588, Precision Time Protocol (PTP). PTP provides high-accuracy timing over an Ethernet network.
➤Digital Relay-to-Relay Communications. MIRRORED BITS communications can monitor internal element conditions
between bays within a station, or between stations, using SEL fiber-optic transceivers. Send digital, analog, and
virtual terminal data over the same MIRRORED BITS channel.
➤Sequential Events Recorder (SER). The SER records the last 1000 events, including setting changes, startups,
and selectable logic elements.
➤Oscillography and Event Reporting. The relay records voltages, currents, and internal logic points at a sampling
rate as fast as 8 kHz. Offline phasor and harmonic-analysis features allow investigation of bay and system
performance. Time-tag binary COMTRADE event reports with high-accuracy time stamping for accuracy better
than 10 s.
➤Digitally Signed Upgrades. The relay supports upgrading the relay firmware with a digitally signed upgrade file.
The digitally signed portion of the upgrade file helps ensure firmware and device authenticity after it is sent over a
serial or Ethernet connection.
➤Increased Security. The relay divides control and settings into seven relay access levels; the relay has separate
breaker, protection, automation, and output access levels, among others. Set unique passwords for each access level.
➤Rules-Based Settings Editor. You can communicate with and set the relay by using an ASCII terminal or use
QuickSet to configure the relay and analyze fault records with relay element response. Use as many as 200 aliases
to rename any digital or analog quantity in the relay.

SEL-487E-3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
4
Functional Overview
Protection Features
Differential Element
In the SEL-487E, the phase differential elements employ
operate (IOPn, where n= A, B, C) and restraint (IRTn)
quantities that the relay calculates from the selected wind-
ing input currents. Figure 2 shows the characteristic of
the filtered differential element as a straight line through
the origin of the form:
IOPA (IRTA) = SLPc• IRTA
For operating quantities (IOPA) exceeding the threshold
level O87P and falling in the operate region of Figure 2,
the filtered differential element issues an output. There
are two slope settings, namely Slope 1 (SLP1) and Slope 2
(SLP2). Slope 1 is effective during normal operating
conditions, and Slope 2 is effective when the fault detec-
tion logic detects an external fault condition. In general,
the relay uses filtered and unfiltered (instantaneous) ana-
log quantities in two separate algorithms to form the dif-
Figure 1 Functional Diagram
Available
Neutral
Input
Bus
3
3
1
1
3
3
3
3
3
SEL-487E
24
51N
50N
25
46
59
50BF
87T
51
4
EIA-232
2
Ethernet*1
1
IRIG-B
REF
50BF
50BF
81
SEL-2800
ENV
49
BRM DFR HMI LGC MET
PMU SBMRTU SER TRM
85
RIO SIP HBL
68 79
32
27
67
87B
50
21
16 S
E
C
ANSI NUMBERS/ACRONYMS AND FUNCTIONS
16 SEC Access Security (Serial, Ethernet)
21* Phase and Ground Distance
24 Volts/Hertz
25 Synchronism Check
27 Undervoltage
32 Directional Power
46 Current Unbalance
49 IEEE C59.71 and IEC 60255-Compliant Thermal Model
50BF Dual Breaker Failure Overcurrent
50N Neutral Overcurrent
50 Overcurrent
(Phase, Zero-Sequence, and Negative-Sequence)
51N Neutral Time-Overcurrent
51 Time-Overcurrent
(Phase, Zero-Sequence, and Negative-Sequence)
59 Overvoltage
67 Directional Overcurrent
(Phase, Zero-Sequence, and Negative-Sequence)
68* Out-of-Step Block
79* Autoreclosing
81 Over- and Underfrequency
85 RIO SEL MIRROREDBITS Communications
87T Transformer Differential
(Unrestrained, Restrained, Neg. Seq.)
87B* Bus Differential (Restrained)
ADDITIONAL FUNCTIONS
BRM Breaker Wear Monitor
DFR Event Reports
ENV SEL-2600 RTD Module*
HBL Harmonic Blocking
HMI Operator Interface
LDP Load Data Profiling
LGC SELOGIC Control Equations
MET High-Accuracy Metering
PMU Synchrophasors
REF Restricted Earth Fault
RTU Remote Terminal Unit
SER Sequential Events Recorder
SBM Station Battery Monitor
SIP Software-Invertible Polarities
TRM Transformer Monitor
1 Copper or Fiber Optic * Optional Feature
50 6751

Schweitzer Engineering Laboratories, Inc. SEL-487E-3, -4 Data Sheet
5
ferential element. The adaptive differential element responds
to most internal fault conditions in less than one and a
half cycles.
The differential element includes one harmonic blocking
and one harmonic restraint element; select either one or
both of them. The combination of harmonic blocking and
restraint elements provides optimum operating speed and
security during inrush conditions. Waveshape-based
inrush detection addresses inrush conditions that contain
low second- and fourth-harmonic content. Fast subcycle
external fault detection supervision adds security during
external faults with CT saturation. The harmonic block-
ing element includes common or independent second-
and fourth-harmonic blocking and independent fifth-
harmonic blocking.
Negative-Sequence Differential
Element
Turn-to-turn internal faults on transformer windings may
not cause enough additional current flow at the transformer
bushing CTs to assert a phase-current differential element,
but left undetected can be very destructive to the trans-
former. When turn-to-turn faults occur, the autotransformer
effect on the shorted section of winding causes a very large
current flow relative to the shorted windings but small
compared to the remainder of the unaffected winding. To
detect these destructive internal faults, the SEL-487E uses a
sensitive negative-sequence current differential element.
This element detects the phase-current unbalance caused
by internal fault by using a single-slope characteristic. Using
negative-sequence restraint, the differential element is not
affected by fluctuating negative-sequence quantities on
the power system and is able to detect turn-to-turn short cir-
cuit conditions in as little as two percent of the total trans-
former winding. External fault detection logic from the
phase-differential element is used to block the negative-
sequence differential element, keeping it secure during
external faults and inrush conditions when CT saturation
may occur.
V/Hz Elements
The SEL-487E provides comprehensive V/Hz protection
(24). The SEL-487E maintains frequency tracking from
40.0 to 65.0 Hz when voltage inputs are provided to the
relay. Two independent V/Hz curves with definite and
custom 20-point curve characteristics can be selected using
programmable logic. Use the two independent V/Hz curves
for loaded versus unloaded transformer protection, allow-
ing maximum sensitivity to overexcitation conditions during
all modes of transformer operation. The single V/Hz element
in the relay can be assigned to either set of three-phase
voltage inputs.
Distance Elements
The SEL-487E protects transformers and transmission
lines with as many as four zones of phase distance and
ground distance elements with either mho or quadrilateral
characteristics. You can set all four zones independently
in the forward or reverse direction. The distance elements
are secured with load-encroachment logic, which prevents
operation of the phase distance elements under high load
conditions; line harmonic-blocking logic, which prevents
element operation when a transformer in the protection
zone is being energized or experiencing an overexcitation
condition; and CCVT transient detection, which blocks
Figure 2 Adaptive Slope Differential Characteristics
IOPA (IRTA)
Operating Region
SLP2
087P
SLP1
Restraining Region
IRTA
Figure 3 Volts/Hertz Curve Diagrams
Time (seconds)
Volts/Hertz (%)
24U101 (110,33)
24U109 (150,22)
24U116 (200,14)
Volts/Hertz (%)
Time (seconds) 33
24U101 (110,33)
24U102 (150,22)
24U103 (200,14)
24U104 (120,30)
24U107 (130,27)

SEL-487E-3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
6
the distance elements when there is transient on the system
with CCVTs that may cause the distance element to over-
reach. All mho elements use positive-sequence memory
polarization that expands the operating characteristic in
proportion to the source impedance. This provides depend-
able and secure operation for close-in faults. The quadri-
lateral phase and ground distance elements provide improved
fault and arc resistance coverage, including application
on short lines.
Out-of-Step Detection
The SEL-487E supports out-of-step detection by using
timers and blinders that are set outside any of the distance
elements. A power swing is declared when an impedance
locus travels through the blinders slower than a preset
time. This logic blocks the distance elements in case of a
stable power swing.
Adaptive Time-Overcurrent
Elements (51S)
The relay supports 20 adaptive time-overcurrent elements
with selectable operate quantity and programmable time-
delay and pickup levels. Choose from the ten time-
overcurrent curves shown in Table 1 (five IEC and
five U.S.). Each torque-controlled time-overcurrent ele-
ment has two reset characteristics. One choice resets the
elements if current drops below pickup for one cycle
while the other choice emulates the reset characteristic of
an electromechanical induction disk relay.
The adaptive time-overcurrent elements in the SEL-487E
allow the selection of a wide variety of current sources as
operate quantities to the element. Select the time-overcurrent
element operate quantity from any one of the following
current sources:
➤Filtered phase currents: IAmFM, IBmFM, ICmFM
➤Maximum filtered phase current: IMAXmF
➤Combined filtered phase currents (any two
terminals): IAmmFM, IBmmFM, ICmmFM
➤Maximum filtered combined phase current:
IMAXmmF
➤Filtered positive-, negative-, and zero-sequence:
I1mFM, 3I2mFM, 3I0mFM, I1mmM, 3I2mmM,
3I0mmM
➤RMS currents: IAmRMS, IBmRMS, ICmRMS,
IMAXmR IAmmRMS, IBmmRMS, ICmmRMS,
IMAXmmR
where:
m= Relay current terminals S, T, U, W, X, Y
mm = Relay current terminals ST, TU, UW, WX
F = Filtered
M = Magnitude
MAX = Maximum magnitude A-, B-, C-phase currents
In addition to the selectable operate quantity, the 51S ele-
ment time-delay and pickup level inputs are SELOGIC-
programmable settings. This flexibility allows these inputs
to be set to fixed numerical values to operate as standard
time overcurrent elements, or the pickup and time-dial
settings can be programmed as SELOGIC math variables.
Programming the time-delay and pickup levels as math
variables allows the numeric value of the pickup and time-
delay settings to change based on system conditions with-
out the added delay of having to change relay setting groups.
For example, change pickup and time-delay settings
dynamically in a parallel transformer application based
upon single or parallel transformer configurations. Another
example would be changing feeder time-overcurrent ele-
ment pickup and coordination delays based upon distributed
generation being connected downstream of a transformer.
REF Protection
Apply the REF protection feature to provide sensitive detec-
tion of internal ground faults on grounded wye-connected
transformer windings and autotransformers. Use single-
phase neutral current inputs for providing neutral CT oper-
ating current for as many as three windings. Polarizing
current is derived from the residual current calculated for
the corresponding protected winding. A directional ele-
ment determines whether the fault is internal or external.
Zero-sequence current thresholds supervise tripping. The
relay can accommodate CT ratio mismatch as great as 35:1.
Figure 4 Mho Characteristics
Table 1 Supported Time-Overcurrent Curves
U.S. Curves IEC Curves
U1 (moderately inverse) C1 (standard inverse)
U2 (inverse) C2 (very inverse)
U3 (very inverse) C3 (extremely inverse)
U4 (extremely inverse) C4 (long-time inverse)
U5 (short-time inverse) C5 (short-time inverse)
Expanded
Characteristic
Steady-State
Characteristic
Relay Reach
Z
R
Z
S
X
R

Schweitzer Engineering Laboratories, Inc. SEL-487E-3, -4 Data Sheet
7
Synchronism Check
Synchronism-check elements prevent circuit breakers
from closing if the corresponding phases across the open
circuit breaker are excessively out of phase, magnitude,
or frequency. The SEL-487E synchronism-check ele-
ments selectively close circuit breaker poles under the
following criteria:
➤The systems on both sides of the open circuit
breaker are in phase (within a settable voltage
angle difference).
➤The voltages on both sides of the open circuit
breaker are healthy (within a settable voltage
magnitude window).
The synchronism-check function is available for as many
as six breakers with a user-selectable reference voltage.
Each element has a user-selectable synchronizing voltage
source and incorporates slip frequency, two levels of
maximum angle difference, and breaker close time into
the closing decision. Include the synchronism-check ele-
ment outputs in the close SELOGIC control equations to
program the relay to supervise circuit breaker closing.
Current Unbalance Elements
The current unbalance logic uses the average terminal cur-
rent to calculate the percentage difference between the
individual phase current and the terminal median current.
If the percentage difference is greater than the pickup value
setting, the phase unbalance element is asserted. To pre-
vent this element from asserting during fault conditions
and after a terminal circuit breaker has closed, the final
terminal unbalance output is supervised using current,
fault detectors, and the open-phase detection logic.
Fault Identification Logic
The purpose of the fault identification logic is to deter-
mine, on a per-terminal basis, which phase(s) was involved
in a fault for which the transformer tripped. Determining
the faulted phase is based on current inputs from wye-
connected CTs. The logic does not determine the faulted
phase for the following cases:
➤Delta-connected CTs (CTCONm= D)
➤Where only zero-sequence current flows through
the relay terminal (no negative-sequence current
and no positive-sequence current)
This logic identifies a sector in which a faulted phase(s)
can appear by comparing the angle between the negative-
and zero-sequence currents I2mand I0m(m= S, T, U, W,
X, Y).
Applications
The SEL-487E offers comprehensive transformer protec-
tion features. Around the clock winding phase compen-
sation simplifies setting the transformer protection elements.
Harmonic restraint and blocking by using second- and
fourth-harmonic quantities provide secure operation during
transformer energization, while maintaining sensitivity
for internal faults. Waveshape-based inrush detection
addresses inrush conditions that contain low second- and
fourth-harmonic content. For applications without voltage
inputs (therefore no V/Hz element), use the fifth-harmonic
monitoring to detect and alarm on overexcitation conditions.
Flexible ordering options allow either 1 A or 5 A CT inputs
for each transformer winding to configure the SEL-487E
for a variety of CT configurations.
Configure the SEL-487E for transformer differential pro-
tection for transformer applications by using as many as
six three-phase restraint current inputs. This includes sin-
gle transformers with tertiary windings. Figure 5 shows
the SEL-487E in a typical two-winding transformer
application. Use the remaining three-phase current inputs
for feeder backup protection.
Use the negative-sequence differential element for sensitive
detection of interturn faults within the transformer winding.
Phase-, negative-, and zero-sequence overcurrent elements
provide backup protection. Use breaker-failure protec-
tion with subsidence detection to detect breaker failure
and minimize system coordination times.
When voltage inputs are provided to the SEL-487E, voltage-
based protection elements and frequency tracking are
made available. Frequency tracking from 40.0 to 65.0 Hz
Figure 5 Two-Winding Transformer Application
Transformer
Differential Zone
3
3
333

SEL-487E-3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
8
over- and undervoltage, and frequency elements, along
with V/Hz elements provide the SEL-487E with accurate
transformer protection for off-frequency events and over-
excitation conditions.
Use the SEL-487E for complete protection of generator
step-up (GSU) transformer applications. Use built-in ther-
mal elements for monitoring both generator and transformer
winding temperatures. Apply the V/Hz element with two
level settings for overexcitation protection of loaded and
unloaded generator operating conditions. Set the directional
power elements to detect forward and reverse power flow
conditions for monitoring and protection of the GSU
transformer in prime power, standby, base load, and peak
shaving applications. Figure 7 shows the SEL-487E in a
typical GSU application.
Distance Protection
The SEL-487E simultaneously supports as many as four
zones of phase and ground distance protection by using
mho or quadrilateral characteristics. You can use expanded
SELOGIC control equations to tailor the relay further to
your particular application. The SEL-487E distance ele-
ments are flexible enough to be used for transmission
line or transformer winding protection, as shown in Figure 8
and Figure 9.
Six Terminal Feeder Protection
Use the six three-phase current terminals on the SEL-487E
to provide comprehensive feeder protection and control
including overcurrent, directional overcurrent, reclosing,
and breaker failure protection for six feeders. Figure 10
shows a single SEL-487E can provide full feeder func-
tionality of six single function feeder relays thereby
reducing the device count within the system.
Figure 6 Single Transformer REF Application
Figure 7 Generator Step-Up Application
High Voltage
Low Voltage
Tertiary
REF
REF
3
3
3 31133
3
3
3 33
1
1REF REF
Figure 8 Transformer Distance Application
Figure 9 Transmission Line Distance Application
Figure 10 Six Terminal Feeder Application
5252
S
3
3
Zone 1
Zone 2
T
3
52
S
3
Zone 1
Zone 2
3
52
3
52 52 52 52
352

Schweitzer Engineering Laboratories, Inc. SEL-487E-3, -4 Data Sheet
9
Synchrophasor Applications
Use the SEL-487E as a station-wide synchrophasor mea-
surement and recording device. The SEL-487E provides
as many as 24 analog channels of synchrophasor data and
can serve as a central phasor measurement unit in any sub-
station or power generation facility. The SEL-487E can be
configured to send five unique synchrophasor data streams
over serial and Ethernet ports. Measure voltage and cur-
rent phase angle relationships at generators and trans-
formers, key source nodes for stability studies and load
angle measurements. Use the SEL-487E to store as much
as 120 seconds of IEEE C37.118 binary synchrophasor
data for all 24 analog channels at a recording rate of 60
messages per second. A SELOGIC control equation trig-
gers storage of data. Capture data as necessary, and then
store this information in SEL-487E nonvolatile memory.
Use this capability to record system transients for com-
parison to state machine estimations.
Additional Features
Front-Panel Display
The LCD shows event, metering, setting, and relay self-
test status information. The target LEDs display relay
target information as shown in Figure 12.
The LCD is controlled by the navigation pushbuttons
(Figure 13), automatic messages the relay generates, and
user-programmed analog and digital display points. The
rotating display scrolls through alarm points, display points,
and metering screens. If none are active, the relay scrolls
through displays of the fundamental and rms metering
screens. Each display remains for a user-programmed
time (1–15 s) before the display continues scrolling. Any
message the relay generates because of an alarm condition
takes precedence over the rotating display.
Figure 12 and Figure 13 show close-up views of the front
panel of the SEL-487E. The front panel includes a 128 x
128 pixel, 3" x 3" LCD screen; LED target indicators; and
pushbuttons with indicating LEDs for local control func-
tions. The asserted and deasserted colors for the LEDs
are programmable. Configure any of the direct-acting push-
buttons to navigate directly to any HMI menu item for fast
viewing of events, alarm points, display points, or the SER.
Bay Control
The SEL-487E provides dynamic bay one-line diagrams on
the front-panel screen with disconnect and breaker con-
trol capabilities for user-selectable bay types. You can
Figure 11 Station-Wide Synchrophasor Application
G
Figure 12 Factory-Default Status and Trip Target LEDs
(12 Pushbutton, 24 Target LED Option)
Figure 13 Factory-Default Front-Panel Display and
Pushbuttons
FAULT QUANTITIES
(pu)
Zone 1 Zone 2
IOPA= 4.35 0.20
IOPB= 4.76 0.12
IOPC= 0.56 0.88
IRTA= 6.65 1.09
IRTB= 6.21 1.81
IRTC= 1.06 1.25
EVENT SUMMARY 10002

SEL-487E-3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
10
download the QuickSet interface from selinc.com to
obtain additional user-selectable bay types. The bay con-
trol can control as many as ten disconnects and two break-
ers, depending on the one-line diagram selected. Certain
one-line diagrams provide status for as many as three
breakers and five disconnect switches. Operate discon-
nects and breakers with ASCII commands, SELOGIC
control equations, Fast Operate Messages, and from the
one-line diagram. The one-line diagram includes user-
configurable apparatus labels and as many as six user-
definable analog quantities.
One-Line Bay Diagrams
The SEL-487E offers a variety of preconfigured one-line
diagrams for common bus configurations. Once you
select a one-line diagram, you can customize the names
for all of the breakers, disconnect switches, and buses.
Most one-line diagrams contain analog display points.
You can set these display points to any of the available
analog quantities (including remote 87L currents) with
labels, units, and scaling. The SEL-487E updates these
values along with the breakers and switch position in real
time to give instant status and complete control of a bay.
The following diagrams demonstrate some of the precon-
figured bay arrangements available in the SEL-487E.
Programmable interlocks help prevent operators from
incorrectly opening or closing switches or breakers. The
SEL-487E not only prevents operators from making an
incorrect control decision, but it can notify and/or alarm
upon initiation of an incorrect operation.
Circuit Breaker Operations From the
Front Panel
Figure 14–Figure 17 are examples of some of the select-
able one-line diagrams in the SEL-487E. Select the one-
line diagram from the Bay settings. Additional settings
for defining labels and analog quantities are also found in
the Bay settings. One-line diagrams are composed of the
following:
➤Bay names and bay labels
➤Busbar and busbar labels
➤Breaker and breaker labels
➤Disconnect switches and disconnect switch labels
➤Analog display points
Figure 18 shows the breaker control screens available
when the ENT pushbutton is pressed with the circuit
breaker highlighted as shown in Figure 18(a).
Figure 14 Breaker-and-a-Half
Figure 15 Ring Bus With Ground Switch
Figure 16 Double Bus/Double Breaker
Figure 17 Source Transfer Bus
BAYNAME
BK2
BK1
SW1 SW2
BK3
BAYLAB2BAYLAB1
BUSNAM1
BUSNAM2
ESCNAVIG
BAYNAME
6 ANALOGS
I:99999.9 A
V:99999.9 KV
P:99999.9 MW
Q:99999.9 MV
F:99.9 HZ
BAYLAB1
SW2
SW3
BK1
BK2
SW1
BAYLAB2
ESCNAVIG
BAYNAME
6 ANALOGS
I:99999.9 A
V:99999.9 KV
P:99999.9 MW
Q:99999.9 MV
F:99.9 HZ
BUSNAM1
SW2
SW3
BK1 BK2
SW1
BUSNAM2
ESCNAVIG
BAYNAME
BUSNAM1
BK1 BK2
BUSNAM2
BAYLAB1
I:99999.9 A
V:99999.9 KV
P:99999.9 MW
I:99999.9 A
V:99999.9 KV
P:99999.9 MW
ESCNAVIG