Date Code 20001006
Manual Change Information
vii
SEL-351 Instruction Manual
Revision
Date
Summary of Revisions
980508
This revision includes the following changes:
−
Added Power Elements to
Section 3: Overcurrent, Voltage, Synchronism
Check, Frequency, and Power Elements
.
−
Added Load Profiling to
Section 8: Breaker Monitor, Metering, and Load
Profile Functions
.
−
Updated Relay Word and explanations in
Section 9: Setting the Relay
.
−
Added COM and LOO commands to
Section 10: Serial Port
Communications and Commands
.
−
Updated Event report and explanations in
Section 12: Standard Event
Reports and SER
.
−
Clarified DNP implementation details in
Appendix H: Distributed Network
Protocol (DNP) V3.00
.
−
Added
Appendix I: Mirrored Bits
.
−
Synchronism-check voltage input logic in Figure 3.26 was clarified. Voltage
input V
A
(or V
AB
for delta), provides frequency determination and has to be
within the “healthy voltage” window (indicated by new Relay Word bit 59VA).
−
Positive-sequence voltage-polarized directional element logic in Figure 4.15 is
clarified with respect to the three-phase current threshold element 50P32 (was
previously shown in the wrong place).
−
The OPEN command is no longer embedded in the trip logic in Figure 5.1 (see
the Note following 4.2) or in the drive-to-lockout logic (see the Note in the
Lockout State
discussion, following Table 6.1).
−
Execution of the OPEN command no longer prevents the COMM target LED
from illuminating for a trip. This provides additional options for the COMM
target LED, discussed in the
Front-Panel Target LEDs
subsection at the end
of
Section 5: Trip and Target Logic
.
−
Relay Word bit TRGTR (Target Reset) is now available and provides
additional options, detailed in Figure 5.17 and accompanying discussion.
−
The CLOSE command is no longer embedded in the close logic in Figure 6.1
(see the Note in the
SET Close
discussion, following Figure 6.1, for more
information).
−
Relay Word bit 52A (Circuit Breaker Status) is now available and provides
additional options, detailed near the end of the
Close Logic
subsection in
Section 6: Close and Reclose Logic
.
−
Additional Relay Word bits 59VA, TRGTR, and 52A added to Row 34 in
Tables 9.4 and 9.8.
−
Revisions were made to accommodate hardware changes related to model SEL-
03510J/03511J, which are connectorized™. New drawings were added to
Section 2: Installation
, and various model-specific text references were
updated throughout the manual.
Summary of Contents for SEL-351
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