ii Manual Change Information Date Code 20011203
SEL-321/321-1 Instruction Manual
Revision
Date
Summary of Revisions
20010215 Reissued entire manual to reflect the following changes:
Updated to new manual format.
Section 2:
- Updated Power Supply information.
Minor corrections made in Appendix A.
20000721
Updated Section 2: Specifications with new k0 range and LOP logic. Updated
Figure 2.22: Negative Sequence Directional Logic and Figure 2.38: Loss-of-
Potential Logic.
Added vector error information in Table 3.13.
Updated Section 5: Applications with new LOP settings and Settings Sheets
with new LOP settings and k0 range.
Updated Section 7: Testing and Maintenance with new LOP references and
updated Firmware Upgrade Instructions.
Updated Appendix A: Firmware Versions. New k0 range, LOP logic and IEC
1000-4-5 compliance for SEL-321-1.
991102
Updated Figure 2.4 and deleted Burn-In information in Section 2:
Specifications.
991022
Updated Section 3: Communications and 321-1 Command Summary to reflect
correct page layout and M
IRRORED BITS™ format.
Reissued page 6.2 in Section 6: Installation due to typographical error (no date
code change).
Updated Appendix A: Firmware Versions: Improved M
IRRORED BITS and
Fast Meter communications.
990614 Updated MIRRORED BITS format throughout to reflect new trademark.
Deleted the Optional jumper-selectable inputs from Section 2: Specifications.
Deleted the Configure the Control Input Voltage subsection and reference to
the control input voltage under the Set Jumpers subsection in Section 6:
Installation.
Deleted the Control Input Voltage subsection in Appendix I: Interface Board
Specifications and renumbered figures.
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