P.2.24
SEL-411L Relay Protection Manual Date Code 20151029
Installation
Relay Placement
Step 13. Replace any cables previously removed from serial ports.
Step 14. Follow your company standard procedure to return the relay to
service.
Step 15. When the relay is turned on, confirm that the relay does not
display a status warning about I/O board addresses. For
information on this status warning, see Relay Self-Tests on
page P.11.38.
Relay Placement
Proper placement of the relay helps make certain that you receive years of
trouble-free power system protection. Use the following guidelines for proper
physical installation of the relay.
Physical Location
You can mount the relay in a sheltered indoor environment (a building or an
enclosed cabinet) that does not exceed the temperature and humidity ratings
for the relay.
The relay is rated at Installation/Overvoltage Category II and Pollution Degree
2. This rating allows mounting the relay indoors or in an outdoor (extended)
enclosure where the relay is protected against exposure to direct sunlight,
precipitation, and full wind pressure, but neither temperature nor humidity are
controlled.
You can place the relay in extreme temperature and humidity locations. The
temperature range over which the relay operates is –40 to +185F (–40 to
+85C). See Operating Temperature on page P.1.15 for more information.
The relay operates in a humidity range from 5 percent to 95 percent, no
condensation, and is rated for installation at a maximum altitude of 2000 m
(6560 feet) above mean sea level.
Rack Mounting
When mounting the relay in a rack, use the reversible front flanges to either
semiflush-mount or projection mount the relay.
The semiflush mount gives a small panel protrusion from the relay rack rails
of approximately 1.1 in. or 27.9 mm. The projection mount places the front
panel approximately 3.5 in. or 88.9 mm in front of the relay rack rails.
See Figure 2.21 for exact mounting dimensions for both the horizontal and
vertical rack-mount relays. Use four screws of the appropriate size for your
rack.
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