SEL-451 Data Sheet
Schweitzer Engineering Laboratories, Inc.
20
Parallel Redundancy Protocol (PRP)
This protocol is used to provide seamless recovery from
any single Ethernet network failure, in accordance with
IEC 62439-3. The Ethernet network and all traffic are
fully duplicated with both copies operating in parallel.
HTTP Web Server
When equipped with Ethernet communications, the relay
can serve read-only web pages displaying certain set-
tings, metering, and status reports. As many as four users
can access the embedded HTTP server simultaneously.
IEC 61850 Edition 2 Ethernet
Communications
IEC 61850 Edition 2 Ethernet-based communications
provide interoperability among IEDs within the substa-
tion. Logical nodes using IEC 61850 allow standardized
interconnection of IEDs from different manufacturers for
monitoring and control of the substation. Reduce wiring
among various manufacturers’ devices and simplify
operating logic with IEC 61850. Eliminate system RTUs
by streaming monitoring and control information from
IEDs directly to remote SCADA client devices.
The SEL-451 can be ordered with embedded IEC 61850
Edition 2 protocol operating on 100 Mbps Ethernet. Use
the IEC 61850 Edition 2 Ethernet protocol for relay
monitoring and control functions, including the follow-
ing:
➤
As many as 128 incoming GOOSE messages. The
incoming GOOSE messages can be used to control
as many as 256 control bits and 256 analog
quantities in the relay with <3 ms latency from
device to device. These messages provide binary
control inputs to the relay for high-speed control
functions and monitoring.
➤
As many as eight outgoing GOOSE messages.
Outgoing GOOSE messages can be configured for
Boolean and/or analog data. Boolean data are
provided with <3 ms latency from device to
device. Use outgoing GOOSE messages for high-
speed control and monitoring of external breakers,
switches, and other devices.
➤
IEC 61850 Edition 2 Data Server. The SEL-451 is
equipped with embedded IEC 61850 Ethernet
protocol that provides data according to pre-
defined logical node objects. As many as seven
simultaneous client associations are supported by
each relay. Relevant Relay Word bits are available
within the logical node data, so status of relay
elements, inputs, outputs or SEL
OGIC
control
equations can be monitored using the IEC 61850
data server provided in the relay.
➤
The SEL-451 supports IEC 61850 standard
operating modes such as Test, Blocked, On, and
Off.
Figure 26
Typical Web Server Default Menu Screen
