Schweitzer Engineering SEL-351P, Quick Start Manual

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13-4 Testing and Troubleshooting Date Code 990215
SEL-351P Manual Técnico
The examples below show the settings necessary to route the phase time-overcurrent element
51P1T to the output contacts and the SER. The 51PT element, like many in the SEL-351P, is
controlled by enable settings and/or torque control SEL
OGIC
®
Control Equations. To enable the
51P1T element, set the E51P enable setting and 51PTC torque control settings to the following:
•
E51P = 1 (via the SET command)
•
51P1TC = 1 (set directly to logical 1, via the SET L command)
Testing Via Front-Panel Indicators
Display the state of the SEL-351P elements, inputs, and outputs using the front-panel or serial
port TAR commands. Use this method to verify the pickup settings of protection elements.
Access the front-panel TAR command from the front-panel OTHER pushbutton menu. To
display the state of the 51PT element on the front-panel display, press the OTHER pushbutton,
cursor to the TAR option, and press SELECT. Press the up arrow pushbutton until TAR 6 is
displayed on the top row of the LCD. The bottom row of the LCD displays all elements asserted
in Relay Word Row 6. The SEL-351P maps the state of the elements in Relay Word Row 6 on
the bottom row of LEDs. The 51P1T element state is reflected on the LED labeled RS. See
Table 9.3 for the correspondence between the Relay Word elements and the TAR command.
To view the 51P1T element status from the serial port, issue the TAR 51P1T command. The
SEL-351P will display the state of all elements in the Relay Word row containing the 51P1T
element.
Review TAR command descriptions in Section 10: Serial Port Communications and
Commands and Section 11: Additional Front-Panel Interface Details for further details on
displaying element status via the TAR commands.
Testing Via Output Contacts
You can set the SEL-351P to operate an output contact for testing a single element. Use the SET
L command (SEL
OGIC
Control Equations) to set an output contact (e.g., OUT104) to the element
under test. The available elements are the Relay Word bits referenced in Table 9.3.
Use this method especially for time testing time-overcurrent elements. For example, to test the
phase time-overcurrent element 51P1T via output contact OUT4, make the following setting:
OUT104 = 51P1T
Time-overcurrent curve and time-dial information can be found in Section 9: Setting the
SEL-351P Recloser Control . Do not forget to reenter the correct SEL-351P settings when you
are finished testing and ready to place the SEL-351P in service.
Testing Via Sequential Events Recorder
You can set the SEL-351P to generate an entry in the Sequential Events Recorder (SER) for
testing SEL-351P elements. Use the SET R command to include the element(s) under test in any
of the SER trigger lists (SER1 through SER3). See
Section 12: Standard Event Reports and
SER .