Schweitzer Engineering Laboratories SEL-321 - Page 8

iv Manual Change Information Date Code 20011203
SEL-321/321-1 Instruction Manual
Revision
Date
Summary of Revisions
980224
Added relay elements:
RBAD, CBAD, LBOK in Figure 2.7 and Figure 2.8 and MIRBRK, MIRFRA,
MIRPAR, MIROVR, MIRIN, MIRSYC, MIRDAT, MIRDIS in Figure 2.22
and Figure 2.23 in the Relay Elements subsection in Section 2:
Specifications.
Mirrored Bits related port settings changes in Table 2.27 in the
Communications Ports Specifications subsection in Section 2:
Specifications.
Corrected label of the 67Q2SD timer in Figure 2.27 and the 67N2SD timer in
Figure 2.28 in the General Specifications subsection in Section 2:
Specifications.
Added COM and LOOP commands in Figure 3.1 in the Command
Characteristics subsection in Section 3: Communications.
Added COM and LOOP commands, revised Table 3.11 and Table 3.12 for
new Mirrored Bits settings requirements, corrected target number ranges in
TARGET command description and Table 3.15, fixed the arrows in Table
3.18 and Table 3.19, all in the Description of Commands subsection in
Section 3: Communications.
Corrected the EBLKD and ETDPU settings prompts in the Settings Sheet for
SEL-321 Relay Setting Example subsection in Section 5: Applications.
Corrected Equation 7.18 in the Ground Quadrilateral Distance Element
Reactive Reach Test Using Three Voltage Sources and One Current Source
subsection in Section 7: Maintenance and Testing.
Modified SEL-321 Relay Command Summary card stock insert to include
COMM and LOOP commands.
Added SEL-321-1 Target Information card stock insert.
Added Appendix H: Mirrored Bits.