Schweitzer Engineering Laboratories, Inc.
SEL-351R Falcon Data Sheet
13
Guideform Specification
The microprocessor-based recloser control shall provide a
combination of functions including protection, monitoring,
control, fault locating, and automation. Recloser control
self-checking functions shall be included. Specific opera-
tional and functional requirements are as follows.
➤
Autoreclosing Control. The recloser control shall
incorporate a four-shot control. It shall include
four independently set open time intervals, an inde-
pendently set reset time from reclose cycle, and an
independently set reset time from lockout.
➤
Coordination With Downstream Reclosers. The
recloser control shall include 38 standard recloser
time-overcurrent curves and sequence coordination
logic for secure and dependable operation.
➤
Phase Fault Overcurrent Protection. The recloser
control shall incorporate phase and negative-sequence
overcurrent elements for detection of phase faults. For
added security, the recloser control shall provide direc-
tional elements, load- encroachment logic, and
torque-control capability (internal and external).
➤
Ground Fault Overcurrent Protection. The
recloser control shall incorporate residual ground
overcurrent elements for detection of ground
faults. For added security, the recloser control shall
provide directional elements and torque-control
capability (internal and external).
➤
Phase Under- and Overvoltage Elements. The
recloser control shall incorporate undervoltage and
overvoltage elements for creating protection and
control schemes, including but not limited to volt-
age checks (e.g., hot bus/dead line) for reclosing;
blown transformer high-side fuse-detection logic;
and control schemes for capacitor banks.
➤
Sequence Voltage Elements. The recloser control
shall incorporate positive-, negative-, and zero-sequence
voltage elements that can be logically configured for
either under- or overvoltage applications.
➤
Under- and Overfrequency Protection. The
recloser control shall incorporate six levels of
under- and overfrequency elements for detection of
power system frequency disturbances. Each setting
level shall use an independently set timer for load-
shedding or generator-tripping schemes.
➤
Synchronism Check. The recloser control shall
include two synchronism-check elements with separate
maximum angle settings (e.g., one for autoreclosing
and one for manual closing). The synchronism-check
function shall compensate for close time and constant
phase-angle differences between the two voltage
sources used for synchronism check (phase-angle dif-
ferences are settable in 30-degree increments).
➤
IED Communications. The recloser control shall
include the capability for communication of inter-
nal logic values to a remote relay or recloser con-
trol via serial communications. These values shall
be available for use in control logic.
➤
Secure Communications. The recloser control shall
include an optional accessory for converting an
EIA-232 serial port to encrypted and authenticated
IEEE 802.11b wireless communication. Software shall
be provided with this accessory to allow a personal
computer (PC) or personal data assistant (PDA) access
to the wireless port.
➤
Operator Controls. The recloser control shall
include 10 operator controls on the recloser control
front panel; these functions shall also be accessible
in the recloser control logic. Nine of the operator
controls shall include pushbuttons and LEDs with
programmable functions and indications.
➤
Event Reporting and Sequential Events
Recorder (SER). The recloser control shall be capa-
ble of automatically recording disturbance events of
15 or 30 cycles with settable prefault duration and
user-defined triggering. Events shall be stored in non-
volatile memory. The recloser control shall include an
SER that stores the latest 512 entries.
➤
Status and Trip Target LEDs. The recloser con-
trol shall include 16 status and trip target LEDs.
➤
Recloser Wear Monitor. The recloser control
shall include a recloser wear monitor with
user-definable wear curves, operation counter, and
accumulated interrupted currents by phase.
➤
Battery Monitor. The recloser control shall measure
and report the battery voltage level. User-selectable
parameters shall be provided to put the control to sleep
for low battery voltage or for a lengthy outage.
➤
Fault Locator. The recloser control shall include a
fault-locating algorithm to provide an accurate estimate
of fault location without communications channels, spe-
cial instrument transformers, or prefault information.
➤
Automation. The recloser control shall include
16 local control elements, 16 remote control logic
points, 16 latching logic points, and 16 display mes-
sages in conjunction with a local display panel. The
recloser control shall have the capability to display cus-
tom messages.
➤
Recloser Control Logic. The recloser control shall
include programmable-logic functions for a wide range
of user-configurable protection, monitoring, and control
schemes.
➤
Communication. The recloser control shall
include two independent EIA-232 serial ports and
one optional EIA-485 serial port for external com-
munication. There shall be an option for DNP3
Level 2 protocol with bitmapping.
➤
IRIG-B. The recloser control shall include an interface
port for a demodulated IRIG-B time synchronization
input signal.
➤
PC Software. The recloser control shall include com-
patibility with a PC software program for use in pro-
gramming control settings and logic functions, and
retrieving event data. The PC software shall be included,
but it is not necessary to use the recloser control.
➤
Power Supply. The recloser control shall accept
120 Vac or 230 Vac (or 125 Vdc or 250 Vdc).
➤
Warranty. The relay shall have a minimum
10-year worldwide warranty.