Schweitzer Engineering SEL-351P, Быстрый старт

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Date Code 990215 Testing and Troubleshooting 13-3
SEL-351P Manual Técnico
Because SEL-351P Recloser Controls are microprocessor-based, their operating characteristics
do not change over time. Time-overcurrent operating times are affected only by the SEL-351P
settings and applied signals. It is not necessary to verify operating characteristics as part of
maintenance checks.
At SEL, we recommend that maintenance tests on SEL-351P Recloser Controls be limited under
the guidelines provided above. The time saved may be spent analyzing event data and
thoroughly testing those systems that require more attention.
T
ESTING
M
ETHODS AND
T
OOLS
Test Features Provided by the SEL-351P
The following features assist you during SEL-351P testing.
METER
Command The METER command shows the ac currents and voltages (magnitude and
phase angle) presented to the control in primary values. In addition, the
command shows power system frequency (FREQ). Compare these
quantities against other devices of known accuracy. The METER command
is available at the serial ports and front-panel display. See
Section 10:
Serial Port Communications and Commands and Section 11: Additional
Front-Panel Interface Details .
EVENT
Command The control generates a 15- or 30-cycle event report in response to faults or
disturbances. Each report contains current and voltage information, SEL-
351P element states, control cable pin statuses, and input/output contact
information. If you question the control response or your test method, use
the event report for more information. The EVENT command is available at
the serial ports. See
Section 12: Standard Event Reports and SER .
SER
Command The control provides a Sequential Events Recorder (SER) event report that
time-tags changes in control element and input/output contact states. The
SER provides a convenient means to verify the pickup/dropout of any
element in the control. The SER command is available at the serial ports.
See
Section 12: Standard Event Reports and SER .
TARGET
Command Use the TARGET command to view the state of control inputs, outputs, and
SEL-351P elements individually during a test. The TARGET command is
available at the serial ports and the front panel. See
Section 10: Serial Port
Communications and Commands and Section 11: Additional Front-Panel
Interface Details.
PULSE
Command Use the PULSE command to test the contact output circuits. The PULSE
command is available at the serial ports and the front panel. See
Section 10:
Serial Port Communications and Commands .
Test Methods
Test the pickup and dropout of the SEL-351P elements using one of three methods: target
command indication, output contact closure, or sequential events recorder (SER).