Schweitzer Engineering Laboratories SEL-351A - Page 529

A.11
Date Code 20080213 Instruction Manual SEL-351A Relay
Firmware and Manual Versions
Instruction Manual
Section 2
➤ Updated Figure 2.1 to include projection panel-mount option.
➤ Added Figure 2.6.
➤ Added details for Connectorized relays.
➤ Added connection diagrams (Figure 2.14–Figure 2.16) for high-impedance or low-impedance grounded,
Petersen Coil grounded, and ungrounded systems.
➤ Added subsection: Voltage Input Rating on page 2.14.
➤ Added subsection: Wye-Connected Voltages (Global setting PTCONN = WYE) on page 2.14.
➤ Added subsection: Delta-Connected Voltages (Global setting PTCONN = DELTA) on page 2.14.
➤ Added subsection: Synchronism Check VS Connection (Global setting VSCONN = VS) on page 2.15.
➤ Added subsection: Broken-Delta VS Connection (Global setting VSCONN = 3V0) on page 2.15.
➤ Added subsection: Polarity Check for VSCONN = 3V0 on page 2.16.
➤ Added Figure 2.8 through Figure 2.11.
➤ Added Figure 2.20 through Figure 2.25.
Section 3
➤ Added additional pickup setting ranges for neutral-ground overcurrent elements operating from the 0.2 A nomi-
nal neutral channel (IN) current input.
➤ Added lower pickup setting ranges for residual-ground overcurrent elements.
➤ Added Tab le 3.11 and Tab le 3.12.
➤ Added Figure 3.24 and Figure 3.25.
➤ Updated subsection: Voltage Input VS Connected Phase-to-Phase or Beyond Delta-Wye Transformer on
page 3.36.
➤ Updated Table 3.9 and Table 3. 13 .
➤ Added Delta-connected voltages to Setting SYNCP on page 3.37.
➤ Added Delta-connected voltages to Synchronism Check Elements Voltage Inputs on page 3.39.
➤ Added Relay Word bits SFAST and SSLOW to Figure 3.27 for indication of relative speed of systems (fast or
slow slip) on either side of an open breaker.
➤ Updated Figure 3.28.
➤ Updated subsection: System Frequencies Determined From Voltages V
A
(or V
AB
for Delta) and V
S
on page 3.40.
➤ Updated Figure 3.30.
➤ Added Figure 3.31.
➤ Updated Table 3.14 and added frequency element time delay setting recommendation.
➤ Updated subsection: Frequency Element Voltage Control on page 3.53.
Table A.3 Instruction Manual Revision History (Sheet 5 of 10)
Revision
Date
Summary of Revisions
Courtesy of NationalSwitchgear.com