Schweitzer Engineering Laboratories SEL-351 - Section 9: Setting the Relay

Date Code 20001006 Setting the Relay i
SEL-351 Instruction Manual
TABLE OF CONTENTS
SECTION 9: SETTING THE RELAY......................................................... 9-1
Introduction..............................................................................................................................9-1
Settings Changes via the Front Panel.........................................................................................9-1
Settings Changes via the Serial Port..........................................................................................9-1
Time-Overcurrent Curves .........................................................................................................9-3
Relay Word Bits (Used in SELOGIC
®
Control Equations) ..........................................................9-7
Settings Explanations .............................................................................................................9-35
Identifier Labels..............................................................................................................9-35
Current Transformer Ratios ............................................................................................9-36
Line Settings...................................................................................................................9-36
Delta-Connected Voltages........................................................................................9-37
Enable Settings ...............................................................................................................9-37
Other System Parameters ................................................................................................9-37
Settings Sheets .......................................................................................................................9-37
Settings Sheets for the SEL-351 Relay....................................................................................9-39
TABLES
Table 9.1: Serial Port SET Commands ..............................................................................................9-1
Table 9.2: Set Command Editing Keystrokes .....................................................................................9-2
Table 9.3: SEL-351 Relay Models and Corresponding Relay Word Bit/TAR Command
Reference Tables........................................................................................................9-7
Table 9.4: SEL-351 Relay Model 0351xT Relay Word Bits...............................................................9-7
Table 9.5: Relay Word Bit Additions for SEL-351 Relay Model 0351xT, Firmware Versions 1
and Greater. ...............................................................................................................9-8
Table 9.6: Relay Word Bit Differences in any SEL-351 Relay Models 0351xT With Delta-
Connected Voltage Inputs as Compared to Table 9.4 and Table 9.5.............................9-9
Table 9.7: SEL-351 Relay Models 0351x0, 0351x1, and 0351xY Relay Word Bits............................9-9
Table 9.8: Relay Word Bit Differences for SEL-351 Relay Model 0351x0, 0351x1, and
0351xY, Firmware Versions 1 and Greater. ..............................................................9-10
Table 9.9: Relay Word Bit Differences in any SEL-351 Relay Models 0351x0, 0351x1, and
0351xY With Delta-Connected Voltage Inputs as Compared to Table 9.7 and
Table 9.8..................................................................................................................9-10
Table 9.10: Relay Word Bit Definitions for SEL-351.........................................................................9-11
FIGURES
Figure 9.1: U.S. Moderately Inverse Curve: U1...................................................................................9-4
Figure 9.2: U.S. Inverse Curve: U2.....................................................................................................9-4
Figure 9.3: U.S. Very Inverse Curve: U3 ............................................................................................9-4
Figure 9.4: U.S. Extremely Inverse Curve: U4 ....................................................................................9-4
Figure 9.5: U.S. Short-Time Inverse Curve: U5...................................................................................9-5
Figure 9.6: I.E.C. Class A Curve (Standard Inverse): C1.....................................................................9-5
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