Schweitzer Engineering Laboratories SEL-701, Instruction Manual

Page: 221 / 468

Date Code 20010719
701 Motor Protection Relay
Event Analysis
Event Reports
9.9
software uses to display oscillographic information include data for 16 samples per
power system cycle. In event reports, time runs down the page; first occurrences are
shown at the top of the page, final conditions at the bottom. Events contain 4 cycles of
pretrigger data and 11 cycles of posttrigger data to show the motor and system
conditions before, during, and after the fault. Definitions and descriptions of the event
report data columns are shown in
Table 9.4 and Table 9.5 .
Current & Voltage Columns
Table 9.4 summarizes the event report current and voltage columns.
Table 9.4 Event Report Current and Voltage Columns
Output, Input, & Element Columns
Table 9.5 summarizes the event report output, input, and relay element control
columns. Not all relays include all the element types.
Table 9.4 Event Report Current and Voltage Columns
Column
Heading
Definition
IA Current measured by channel IA (primary A)
IB Current measured by channel IB (primary A)
IC Current measured by channel IC (primary A)
IG Residual current (IA + IB + IC, primary A)
IN Current measured by channel IN (primary A)
VA or VAB Voltage measured by channel VA or VAB (primary V)
VB or VBC Voltage measured by channel VB or VBC (primary V)
VC or VCA Voltage measured by channel VC or calculated from
VAB and VBC (primary V)