Sel 421 - Figure 4.37 Sample HIS Command Output: Terminal

U.4.46
SEL-421 Relay User’s Guide Date Code 20090715
Basic Relay Operations
Reading Oscillograms, Event Reports, and SER
Step 1. Prepare to monitor the relay at Access Level 1.
a. Using a communications terminal, type ACC <Enter>.
b. Type the Access Level 1 password and press <Enter>.
You will see the Access Level 1 => prompt.
Step 2. Type HIS <Enter> to examine the event history
You will see a screen display similar to Figure 4.37.
=>HIS <Enter>
Relay 1 Date: 10/27/2004 Time: 10:22:23.895
Station A Serial Number: 0000000000
# DATE TIME EVENT LOCAT CURR GRP TARGETS
10001 10/26/2004 15:45:08.760 TRIG $$$$.$$ 638 1
10000 10/07/2004 08:17:08.881 ER $$$$.$$ 0 1
=>
Figure 4.37 Sample HIS Command Output: Terminal
For more information on the event history, see Event History on page A.3.31.
Viewing High-
Resolution
Oscillograms
Once you have successfully generated an event, you can view high-resolution
oscillograms and event report oscillograms about this event. When gathered
from a field-installed relay, this information helps you assess power system
operating conditions. In addition, when you first install the relay, this
reporting information helps you confirm that you have connected the relay
correctly.
The SEL-421 outputs high-resolution oscillography data in the binary
COMTRADE file format (IEEE/ANSI standard C37.111-1999). File transfer
is the only mechanism for retrieving high-resolution COMTRADE data from
the relay.
The SEL-5601 Analytic Assistant is a program you can use to view
COMTRADE data. Many third-party software suppliers can provide you with
programs to display and manipulate COMTRADE files.
Retrieving High-Resolution COMTRADE Data: Terminal
The relay recorded the event triggered in Triggering an Event on page U.4.42.
The procedure in the following steps shows you how to retrieve the high-
resolution raw oscillography data for this event.
Perform the steps listed in Triggering an Event on page U.4.42 before
executing the instructions in this example. For this procedure, you must use a
communications terminal emulation computer program capable of file
transfers (this function is not available in
ACSELERATOR QuickSet).
If you need help finding a terminal emulation program, contact the SEL
factory or your local Technical Service Center.
Step 1. Prepare to monitor the relay at Access Level 1.
a. Using a communications terminal, type ACC <Enter>.
b. Type the Access Level 1 password and press <Enter>.
You will see the Access Level 1 => prompt.
Courtesy of NationalSwitchgear.com