Schweitzer Engineering Laboratories SEL-787 - Figure 9.6 Example Standard 15-Cycle Digital Event Report (EVE D Command); Table 9.4 Differential Event Report Column Definitions for Analog Quantities

9.18
SEL-787 Relay Instruction Manual Date Code 20081022
Analyzing Events
Event Reporting
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Figure 9.6 Example Standard 15-cycle Digital Event Report (EVE D
Command) 1/4 Cycle Resolution
Differential Event
Report (EVE DIFz
Command)
The differential event report includes:
➤ Differential analog quantities for 87-1, 87-2 and 87-3
differential elements
➤ Digital states of differential and harmonic protection elements,
plus status of base model digital inputs and outputs
➤ Event summary
➤ Relay settings
Use the EVE DIFz n command to view the normal Differential Report (z =1
for 87-1 element, z = 2 for 87-2 element and z = 3 for 87-3 element) with 4
samples/cycle for report n (if not listed, n is assumed to be 1).
Refer to the example event report in Figure 9.7 to view the differential event
report columns. This example event report displays rows of information each
1/4 cycle. Retrieve this report with the EVE DIF1 command.
Table 9.4 gives the Differential event report column definitions for the Analog
Quantities IOPz, IRTz, IzF2 and IzF5 for z = 1,2 and 3. Table 9.5 gives the
Differential event report digital column definitions for the Protection and
Control elements and the base model inputs and outputs.
Table 9.4 Differential Event Report Column Definitions for Analog Quantities
(Sheet 1 of 2)
Column
Heading
Description
IOP1 Operate Current for Differential element 87-1 (multiples of TAP)
IRT1 Restraint Current for Differential element 87-1 (multiples of TAP)
I1F2 Second Harmonic current for Differential element 87-1 (multiples of TAP)
I1F5 Fifth Harmonic current for Differential element 87-1 (multiples of TAP)
IOP2 Operate Current for Differential element 87-2 (multiples of TAP)
IRT2 Restraint Current for Differential element 87-2 (multiples of TAP)