Schweitzer Engineering SEL-351P - Checks before the SEL-351 P Is Put in Service; SF6 Pressure Sensor

Installation
SEL-351P Quick-Start Installation and User's Guide (Portuguese) 11
actuator. The de-energized close output contact provides a path for the
trip capacitor current. At the end of the trip operation, the break contact
opens momentarily to interrupt the trip current.
When the SEL-351P closes the recloser, the close output contact moves
to the position to connect the close capacitor (terminal 14) to the
magnetic actuator. The de-energized trip output contact provides a path
for the close capacitor current. At the end of the close operation, the
break contact opens momentarily to interrupt the close current.
Terminal 8, below the break contact in
Figure 4, provides the return to
the trip and close capacitors.
SF6 Pressure Sensor
Terminals 3 and 11 provide whetting voltage for the SF6 gas pressure
sensor on the recloser. Terminals 4 and 12 take in the SF6 gas pressure
sensor signal and compare it to an EZ setting threshold for low pressure
indication. See the Settings section for more EZ settings details.
Checks Before the SEL-351P is Put in Service
!
CAUTION: Do not connect the SEL-351P to an energized recloser until all control settings have been
properly programmed and verified and all front-panel operator controls are in their proper state (see
Figure 7). Refer to the Settings section of this guide for programming procedures. Failure to comply
can result in control and recloser misoperation, equipment damage, and personal injury.
If the alternate settings are not going to be used, copy the main settings
(Settings Group 1) to the alternate settings (Settings Group 2) with the
COPY command (i.e., COP 1 2; see
Table 2 in the Communications
section). The settings in both settings groups will then be the same. If
the AJUSTES ALTERNATIVOS operator control pushbutton is
accidentally pressed (switching the active settings group), the SEL-351P
still operates on the same settings. Refer to the Factory EZ Settings
subsection in the Settings section for more information on main and
alternate settings.
Set the date and time with the DATE and TIME commands (DAT and
TIM, respectively; see
Table 2 in the Communications section).
Control Tests
Refer to the Testing section.