Areva MiCOM P441, Technical Manual

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P44x/EN IN/E33 Installation
Page 6/10 MiCOM P441/P442 & P444
Further details on mounting MiDOS relays can be found in publication R7012, “MiDOS Parts
Catalogue and Assembly Instructions”.
Case size summation Blanking plate part number
5TE GJ2028 001
10TE GJ2028 002
15TE GJ2028 003
20TE GJ2028 004
25TE GJ2028 005
30TE GJ2028 006
35TE GJ2028 007
40TE GJ2028 008
TABLE 1 - BLANKING PLATES
4.2 Panel mounting
The relays can be flush mounted into panels using M4 SEMS Taptite self-tapping screws
with captive 3mm thick washers (also known as a SEMS unit).
These fastenings are available in packs of 5 (our part number ZA0005 104).
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.
Alternatively tapped holes can be used if the panel has a minimum thickness of 2.5mm.
For applications where relays need to be semi-projection or projection mounted, a range of
collars are available.
Where several relays are to mounted in a single cut-out in the panel, it is advised that they
are mechanically grouped together horizontally and/or vertically to form rigid assemblies
prior to mounting in the panel.
NOTE: It is not advised that MiCOM relays are fastened using pop rivets as
this will not allow the relay to be easily removed from the panel in the
future if repair is necessary.
If it is required to mount a relay assembly on a panel complying to BS EN60529 IP52, it will
be necessary to fit a metallic sealing strip between adjoining relays (Part no GN2044 001)
and a sealing ring selected from Table 2 around the complete assembly.