Schweitzer Engineering Laboratories SEL-251 - Page 3

Date Code 20000421 Manual Change Information i
SEL-251, -2, -3 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.
20000421
Section 2: Specifications:
− Updated to include details for 1-amp nominal current input model.
− Added frequency and rotation information
− Incorporated "New SEL-200 Series Optical Isolator Logic Input Rating"
addendum.
− Combined specifications for Conventional Terminal Block models and Plug-
In Connector models.
− Incorporated "SEL-151/151C/251/251C Instruction Manual Addendum
for 1 Amp Version Relays"
Section 5: Applications
− Added note to Settings Sheets to indicate different setting ranges for 1-amp
nominal current input relays.
Section 6: Installation
− Incorporated "Jumper Installation Instructions" addendum.
− Incorporated "SEL-200 Series (Shallow) Relay Hardware" addendum.
− Added Figure 6.5: LP Relay Dimensions and Drill Plan (for relays with
1-amp nominal current inputs).
Section 7: Maintenance and Testing
− Added note to indicate that the Low-Level Test Interface is not available on
LP chassis relays.
Appendix B
− Added note below Figure B.1 that describes the difference in test point
locations for LP chassis relays.
− Reissued all Appendices.