Schweitzer Engineering Laboratories SEL-311L, Instruction Manual, Page: 367 / 734

Date Code 20010625 Setting the Relay 9-29
SEL----311L Instruction Manual
Row Bit Definition
Primary
Application
51 LBOKB Channel B, received M
IRRORED
B
IT
data OK in
loopback mode
Testing,
Indication
CBADB Channel B, channel unavailability over threshold
RBADB Channel B, outage duration over threshold
ROKB Channel B, received M
IRRORED
B
IT
data OK
LBOKA Channel A, received M
IRRORED
B
IT
data OK in
loopback mode
CBADA Channel A, channel unavailability over threshold
RBADA Channel A, outage duration over threshold
ROKA Channel A, received M
IRRORED
B
IT
data OK
52 81D1 Level 1 instantaneous frequency element (with
corresponding pickup setting 81D1P; see
Figure 3.57) Testing
81D2 Level 2 instantaneous frequency element (with
corresponding pickup setting 81D2P; see
Figure 3.57)
81D3 Level 3 instantaneous frequency element (with
corresponding pickup setting 81D3P; see
Figure 3.57)
81D4 Level 4 instantaneous frequency element (with
corresponding pickup setting 81D4P; see
Figure 3.57)
81D5 Level 5 instantaneous frequency element (with
corresponding pickup setting 81D5P; see
Figure 3.57)
81D6 Level 6 instantaneous frequency element (with
corresponding pickup setting 81D6P; see
Figure 3.57)
27B81 Undervoltage element for frequency element
blocking (any phase voltage below pickup setting
27B81P; see Figure 3.56)
*