b6
-10 MiCOM P40 Agile
5.1 Rack mounting
MiCOM relays may be rack mounted using single tier rack frames (our part number FX0021
001), as shown in Figure 2. These frames have been designed to have dimensions in
accordance with IEC 60297 and are supplied pre-assembled ready to use. On a standard
483mm (19”) rack system this enables combinations of widths of case up to a total
equivalent of size 80TE to be mounted side by side.
Relays in 80TE cases are also available as direct 19” rack mounting ordering variants,
having mounted flanges similar to those shown in Figure 2.
The two horizontal rails of the rack frame have holes drilled at approximately 26mm intervals
and the relays are attached via their mounting flanges using M4 Taptite self-tapping screws
with captive 3mm thick washers (also known as a SEMS unit).
Note: Conventional self-tapping screws, including those supplied for mounting MIDOS
relays, have marginally larger heads which can damage the front cover moulding if
used.
Once the tier is complete, the frames are fastened into the racks using mounting angles at
each end of the tier.
Figure 2 - Rack mounting of relays
Relays can be mechanically grouped into single tier (4U) or multi-tier arrangements by
means of the rack frame. This enables schemes using products from the MiCOM and
MiDOS product ranges to be pre-wired together prior to mounting.
Where the case size summation is less than 80TE on any tier, or space is to be left for
installation of future relays, blanking plates may be used. These plates can also be used to
mount ancillary components. Table 1 shows the sizes that can be ordered.
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