Sel 421 - Table 6.5 UUT Database Entries for SEL-5401 Relay Test System Software-1 a Relay

U.6.8
SEL-421 Relay User’s Guide Date Code 20090715
Testing and Troubleshooting
Relay Test Connections
Relay Test Connections
NOTE: The procedures specified in
this subsection are for initial relay
testing only. Follow your company
policy for connecting the relay to the
power system.
The SEL-421 is a flexible tool that you can use to implement many protection
and control schemes. Although you can connect the relay to the power system
in many ways, connecting basic bench test sources helps you model and
understand more complex relay field connection schemes.
Test Setup
Test Source Connections
For each relay element test, you must apply ac voltage and current signals to
the relay. The text and figures in this subsection describe the test source
connections you need for relay protection element checks. You can use these
connections to test protective elements and simulate all fault types.
Connections for Three Voltage Sources and Three Current Sources
Figure 6.2 shows the connections to use when you have three voltage sources
and three current sources available.
Table 6.5 UUT Database Entries for SEL-5401 Relay Test System
Software—1 A Relay
Label Scale Factor Unit
1IAW15 A
2IBW15 A
3ICW15 A
4IAX15 A
5IBX15 A
6ICX15 A
7VAY150V
8VBY150 V
9VCY150 V
10 VAZ 150 V
11 VBZ 150 V
12 VCZ 150 V
Courtesy of NationalSwitchgear.com