SEL-787-3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
16
Available reports, which also show the status of digital
inputs and outputs, include the following:
➤ Analog event reports that use filtered data and show
all analog channels at four samples per cycle.
➤ Digital event reports that show pickup of protection
elements including overcurrent, demand, voltage
overexcitation, frequency, and over- and undervolt-
age elements at four samples per cycle.
➤ Differential event reports that show differential
quantities, element pickup, SEL
OGIC control equa-
tion set variables, and inputs and outputs at four sam-
ples per cycle.
➤ Raw analog event reports that use unfiltered data at
32 samples per cycle.
Automation
Flexible Control Logic and Integration Features
The SEL-787 is equipped with as many as four inde-
pendently operated serial ports: one EIA-232 port on the
front, one EIA-232 or EIA-485 port on the rear, one
fiber-optic port, and one EIA-232 or EIA-485 port option
card. The relay does not require special communications
software. Use any system that emulates a standard termi-
nal system for engineering access to the relay. Establish
local or remote communication by connecting
computers; modems; protocol converters; printers; an
SEL-3530 RTAC, SEL-2032, SEL-2030, or SEL-2020
Communications Processor; SCADA serial port; or an
RTU. Refer to Table 6 for a list of communications pro-
tocols available in the SEL-787. Apply an SEL commu-
nications processor as the hub of a star network, with
point-to-point fiber or copper connection between the
hub and the SEL-787.
Table 6 Communications Protocols (Sheet 1 of 2)
Type Description
Simple ASCII Plain language commands for human and simple machine communications.
Use for metering, setting, self-test status, event reporting, and other functions.
Compressed ASCII Comma-delimited ASCII data reports.
Allows external devices to obtain relay data in an appropriate format for direct import into spreadsheets and
database programs.
Data are checksum protected.
Extended Fast Meter and
Fast Operate
Binary protocol for machine-to-machine communications.
Quickly updates SEL-3530 RTAC, SEL-2032, SEL-2030, and SEL-2020 communications processors,
RTUs, and other substation devices with metering information, relay elements, I/O status, time tags, open
and close commands, and summary event reports.
Data are checksum protected.
Binary and ASCII protocols operate simultaneously over the same communications lines, so control
operator metering information is not lost while a technician is transferring an event report.
Direct communications with the SEL-2600 RTD Module are possible using the unsolicited Fast Meter
protocol to read incoming temperature data from the SEL-2600.
Fast SER Protocol Provides SER events to an automated data collection system.
DNP3 Serial or Ethernet-based DNP3 protocols.
Provides default and mappable DNP3 objects that include access to metering data, protection elements,
Relay Word bits, contact I/O, targets, SER, relay summary event reports, and setting group selection.
Modbus Serial- or Ethernet-based Modbus protocol with point remapping.
Includes access to metering data, protection elements, contact I/O, targets, SER, relay summary event
reports, and setting groups.
IEC 61850 Ethernet-based international standard for interoperability between intelligent devices in a substation.
Operates remote bits and I/O.
Monitors Relay Word bits and analog quantities.
Synchrophasors IEEE C37.118-compliant synchrophasors for system state, response, and control capabilities.
Event Messenger The use of the SEL-3010 allows you to receive alerts directly on your cell phone.
Alerts can be triggered through relay events and can include measured quantities by the relay.
DeviceNet Allows for connection to a DeviceNet network for access to metering data, protection elements, contact I/O,
targets, and setting groups.
To Next Page
Loading...
