Date Code 20001006 Manual Change Information ix
SEL-351 Instruction Manual
Revision
Date
Summary of Revisions
Added 0.05 A Ordering Option for Channel IN [Sensitive Earth Fault (SEF)
Applications]:
− Current input, overcurrent, and metering specifications updated in the General
Specifications subsection in Section 1: Introduction and Specifications.
− Neutral ground overcurrent element pickup specifications updated in
Section 3: Overcurrent, Voltage, Synchronism Check, and Frequency
Elements.
− The nonavailability of the channel IN current-polarized directional element
explained in subsections Directional Control for Neutral Ground and
Residual Ground Overcurrent Elements and Directional Control Settings
(setting ORDER) in Section 4: Loss-of-Potential, Load Encroachment, and
Directional Element Logic.
− Neutral Ground demand current pickup specifications updated in Table 8.3 in
Section 8: Monitoring and Metering Functions.
− Neutral ground overcurrent element and demand current pickup specifications
updated in the Settings Sheets at the end of Section 9: Setting the Relay.
Channel IN current transformer ratio setting (CTRN) range expanded to
10,000.
Modified Recloser Logic:
− Relay goes to the Lockout State for Open Command execution [see OPE
Command (Open Breaker) in Section 10: Serial Communications and
Commands].
Other Significant Manual Changes:
General Specifications in Section 1: Introduction and Specifications:
− Updated specifications in AC Voltage Inputs, AC Current Inputs, Output
Contacts, and Routine Dielectric Test.
− − Added IEC 255-22-4 and IEC 255-21-3.
− Expanded on MW / MVAR metering accuracy specifications.
970326 This revision includes the following changes:
− Section 1, Page 1-11 - changed Phase Angle Accuracy to ±0.5°.
− Section 3, Page 3-26 - enlarged Figure 3.20 (date code not changed).
− Section 4, Page 4-3 - fixed format of Figure 4.2 (date code not changed).
− Section 7, Page 7-17 - reprint to fix printer error (date code not changed).
− Section 8, Pages 8-8 to 8-12 - reprint to fix printer error affecting Figures 8.1,
8.2, and 8.4 - 8.7 (date code not changed).
Courtesy of NationalSwitchgear.com
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