9-20
Setting the Relay
Date Code 20011205
SEL----311A Instruction Manual
Row
Bit
Definition
Primary
Application
TMB2B
Channel B, transmit bit 2
TMB1B
Channel B, transmit bit 1
51
LBOKB
Channel B, received data OK in loop back mode
CBADB
Channel B, channel unavailability over threshold
RBADB
Channel B, outage duration over threshold
ROKB
Channel B, received data OK
LBOKA
Channel A, received data OK in loop back mode
CBADA
Channel A, channel unavailability over threshold
RBADA
Channel A, outage duration over threshold
ROKA
Channel A, received data OK
S
ETTINGS
E
XPLANATIONS
Note that most of the settings in the settings sheets that follow include references for additional
information. The following explanations are for settings that do not have reference information
anywhere else in the instruction manual.
Identifier Labels
Refer to Settings Sheet 1.
The SEL-311A Relay has two identifier labels: the Relay Identifier (RID) and the Terminal
Identifier (TID). The Relay Identifier is typically used to identify the relay or the type of
protection scheme. Typical terminal identifiers include an abbreviation of the substation name
and line terminal.
The relay tags each report (event report, meter report, etc.) with the Relay Identifier and Terminal
Identifier. This allows you to distinguish the report as one generated for a specific breaker and
substation.
RID and TID settings may include the following characters: 0-9, A-Z, #, &, @, -, /, ., space.
These two settings cannot be made via the front-panel interface.
Current Transformer Ratios
Refer to Settings Sheet 1.
Phase and polarizing current transformer ratios are set independently.
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