Date Code 20011203 Manual Change Information iii
SEL-321/321-1 Instruction Manual
Revision
Date
Summary of Revisions
990331
Section 3: Communications: Updated Tables 3.11 and 3.12 in to include MB8
protocol. Changed ® to ¯ on page 3-43.
Appendix H: Updated to include MB8 protocol.
Section 6: Installation: Updated figure captions for Figures 6.2, 6.4, and 6.12.
Deleted Figure 6.11. Renumbered subsequent figures.
Section 2: Specifications: Changed variables “(X, Y, Z, W, or Z)” to the
correct variables “(V, W, X, Y, or Z)” listed on page 2-22.
Appendix A: Changed “event reported” to the correct “event reports” on
page A-9.
Appendix I: Replaced Figure I.15.
981030
Updated Figure 1.3 in Section 1: Introduction to reflect new current
transformer shorting connector.
Incorporated “Electronic-Level Input Option” addendum into Section 1:
Introduction.
Added front and rear panel drawings, Figure 6.11: SEL-321 Relay Horizontal
Front and Rear Panel Drawings (One I/O Board Plug-In Connector Version;
16 high-current interrupting outputs with shared return terminals) in
Section 6: Installation.
Replaced Figures 6.13, 6.14, 6.15, and 6.16 in Section 6: Installation with
Figures 6.14 and 6.15.
Revised manual to change model references for the current transformer shorting
connector and for respective wiring harness part numbers. See Note, Rear-
Panel Plug-In Connectors Option (Figure 6.10 through Figure 6.13),
Section 6.
Corrected pagination on pages 7-17 through 7-24.
Revised Figure B.1 in Appendix B: SEL-321 Main Board Jumper, Connector,
and Socket Locations.
980812
Updated Appendix A: Firmware Versions. Improved diagnostics.
980715
Updated Appendix A: Firmware Versions.
980529
Updated Appendix A: Firmware Versions. Changed series compensation
logic. Changed long memory constant time to 31.75 cycles.
980320 Updated hardware references throughout entire manual.
Changed ERESTART default to Y.
Revised Section 6: Installation.
Added low-level test interface to Section 7: Maintenance and Testing.
Revised Figure 3.1.
Added Appendix I: Interface Board Specifications.
To Next Page
Loading...
