Schweitzer Engineering Laboratories SEL-321 - Page 5

Date Code 20011203 Manual Change Information i
SEL-321/321-1 Instruction Manual
MANUAL CHANGE INFORMATION
The date code at the bottom of each page of this manual reflects the creation or revision date.
Date codes are changed only on pages that have been revised and any following pages affected
by the revisions (i.e., pagination). If significant revisions are made to a section, the date code on
all pages of the section will be changed to reflect the revision date.
Each time revisions are made, both the main table of contents and the affected individual section
table of contents are regenerated and the date code is changed to reflect the revision date.
Changes in this manual to date are summarized below (most recent revisions listed at top).
Revision
Date
Summary of Revisions
The Manual Change Information section has been created to begin a record of revisions to
this manual. All changes will be recorded in this Summary of Revisions table.
20011203 Appendix A:
- Fix for TCM logic bug.
20011026 Reissued entire manual to reflect the following changes:
Section 2:
- Settings 59QL and 59PL are no longer hidden when ELOP = N1, Y1, or Y2.
- Corrected Figure 2.31: Permissive Overreaching Transfer Trip Scheme
Logic.
Section 3:
- Clarified PULSE n t command.
- Updated screen capture text in subsection SET P.
Section 5:
- Corrected typographical error in subsection Original Loss-of-Potential
Logic.
- Corrected Z1ANG and Z0ANG settings ranges in the Settings Sheets.
- Added M
IRRORED BITS settings to Settings Sheets.
Section 6:
- Corrected typographical error in subsection IRIG-B Input Connection.
Section 7:
- Corrected typographical errors.
Appendix A:
- Improved frequency tracking algorithm.
- Availability of 59Q and 59P elements when advanced LOP is enabled.