18.33
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Synchrophasors
Control Capabilities
Control Capabilities
Serial Port Fast Operate Operation
The PMU can be configured to process SEL Fast Operate commands received on
serial ports that have the Port setting PROTO := PMU, when the Port setting
FASTOP := Y, and Global Settings EPMU := Y and PMAPP := F.
This functionality can allow a remote device (client) to initiate control actions in
a serially connected PMU without the need for a separate communications inter-
face. The client should enable Fast Operate Transmit on the serial port connected
to the PMU. This can be accomplished with Global Setting EPMU := Y, Port Set-
tings PROTO := PMU, FASTOP := Y, and PMUMODE set to either CLIENTA or
CLIENTB.
The client can request a Fast Operate Configuration Block when the relay is in
the nontransmitting mode, and the relay will respond with a message, which
includes codes that define the circuit breaker and remote bit control points that
are available via Fast Operate commands.
Once the control points are identified, the Fast Operate Output (FOP) Control
Bits can be assigned to SEL
OGIC equations in the client’s SELOGIC freeform pro-
tection logic settings. FOP Control Bits take the form FOPp_n, where p is the
serial port (F, 1, 2, or 3) and n is the bit number from 01–32. The bit number can
correspond to a circuit breaker or remote bit control in the local relay, identified
in the Fast Operate Configuration Block.
A change to any FOPp_n value will cause the client to transmit a Fast Operate
remote bit control message on Port p. If the FOP control bit asserts, the message
will contain the opcode to set the corresponding control bit in the PMU. If it
deasserts, the message will contain the opcode to clear the control bit. The
remote device will send a Fast Operate message no later than 20 ms after it
detects a change in the FOP bit.
The PMU will process Fast Operate requests regardless of whether synchropha-
sors are being transmitted, as long as serial port setting FASTOP := Y and PMU-
MODE is set to SERVER. When FASTOP := N, the relay will ignore Fast
Operate commands. Use the FASTOP := N option to lock out any control actions
from that serial port if required by your company operating practices.
SEL Fast Operate commands are discussed in SEL Fast Meter, Fast Operate, Fast
SER Messages, and Fast Message Data Access on page 15.28.
The PMU can also process the Fast Operate commands embedded in the
extended frame of the C37.118 command frame. This way you can accomplish
both synchrophasor measurement and control using the same C37.118 protocol
on both serial and Ethernet interfaces. This way is also independent of the FAS-
TOP setting. The SEL-3378 is capable of sending the extended frame commands.
Ethernet Fast Operate Operation
Fast Operate commands can be issued from a host device to control the function
of remote bits and breaker operation in the relay. When coupled with synchro-
phasor measurements, Fast Operate commands can provide control to system
events when using an SEL-3378.
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