Schweitzer Engineering Laboratories SEL-421-4, Instruction Manual

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19.9
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Remote Data Acquisition
IEC 61850-9-2 Sampled Values (SV)
of a current or voltage terminal must be mapped to an SV stream, and each
stream must contain at least one set of voltage or current terminal phase quanti-
ties.
SV Publisher Startup
When initially turned on, the SV publisher ENABLED LED illuminates as soon as
protection functionality is enabled, typically within 10 seconds, but there can be
an additional delay of approximately 6 seconds before the initial SV publication
is transmitted. Once the SV publisher has begun transmitting SV streams, they
can be temporarily disabled for the following conditions:
➤
Port 5 settings are modified
➤
A new CID file configuration is enabled
➤
Power is cycled
SV publications stop if the SV publisher is disabled (EN Relay Word bit = False),
the Port 5 setting EPORT is set to “N”, or the processor fails. SV publications
will not resume unless the disabling condition is addressed.
SV Publisher Diagnostics and Testing
Once SV publication is configured and enabled, new commands are available to
verify configuration, diagnose and troubleshoot SV communications, and aid in
commissioning and testing:
COM SV and TEST SV .
The COM SV command displays information about the SV streams that the unit
is configured to publish. The data includes the SV destination MAC address,
Application ID, message name, dataset name, VLAN ID, and priority if the SV
publisher is configured via CID file. If the publisher is configured via Port 5 set-
tings, the dataset name remains blank because it is not used in Port 5 settings, and
therefore unavailable. For more information on the
COM SV command, see
Section 9: ASCII Command Reference in the product-specific manual.
The TEST SV command places the SV publisher into TEST SV mode. In this
mode, it replaces the current and voltage data of all SV configured streams with
predefined signals for a period of 15 minutes. Also, the SV publisher asserts the
test bit in the quality attribute of each current and voltage to identify it as test
data. Note that the SV publisher remains in normal mode, and does not enter
IEC 61850 Test mode. This does not affect metering or protection functions on
the SV publisher. The
COM SV command indicates whether the SV publisher is
in TEST SV mode by displaying the information at the top of the response. Refer
to the
TEST SV command description in Section 9: ASCII Command Reference
in the product-specific manual for more information.
SV Subscriber
SV Subscriber Functionality
SEL SV subscriber relays do not have current or voltage input terminals like con-
ventional relays. SV subscriber relays also do not have internal instrument trans-
formers. Conventional relays are typically ordered from the factory with either
1 A or 5 A nominal CTs, which provide the full range of measured values for the
current input terminals. Before or during installation, SEL SV subscriber relays
must be configured with the same nominal current value of the merging unit for
proper operation. The ASCII command
CFG CTNOM n , where n is 1 or 5, must
be used to configure the SV subscriber with the nominal current value of the sub-