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SEL-421/SEL-421-1 Relay Date Code 20020501
Applications Handbook Section 1: Protection Application Examples
Added Notes to flag the differences in the SEL-421-1 Relay.
Corrected control inputs in Auto-Reclose Examples.
Added explanation for missing setting 3PMRCD (Manual Close Reclaim Time Delay) in Recloser Closing on
page A1.137.
Applications Handbook Section 2: Monitoring and Metering
Corrected communications equipment battery voltage to 48 Vdc in Figure 2.12 on page A2.22.
Revised text and Table 2.16 on page A2.32 for power and energy specifications.
Applications Handbook Section 3: Analyzing Data
Corrected compressed ASCII command example in Event File Download procedure.
Reference Manual Section 1: Protection Functions
Added Notes to flag the differences in the SEL-421-1 Relay.
Included more explanation for settings ALTI and ALTV in Current and Voltage Source Selection on
page R1.2.
Corrected setting ORDER text in ORDER on page R1.24.
Supplemented Series-Compensation Line Logic on page R1.38 material.
Reference Manual Section 3: SEL
OGIC
®
Control Equation Programming
Added Notes to flag the differences in the SEL-421-1 Relay.
Reference Manual Section 6: DNP 3.0 Communications
Updated setting TIMERQ to reflect correct prompt and default (no change in the relay).
Reference Manual Section 9: Settings
Added Notes to flag the differences in the SEL-421-1 Relay.
Reference Manual Appendix A: Relay Word Bits
Added Notes to flag the differences in the SEL-421-1 Relay.
Index
Added index entries for configurable front-panel labels, SEL-421-1 Relay, and series-compensated line.
20010703 Initial Release.
Release Date Summary of Changes in this Release (Sheet 2 of 2)
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