P54x/EN IN/La4 Installation
(IN) 15-6
MiCOM P543, P544, P545 & P546
IN
5.2 Panel mounting
The P54x may be specifically-ordered for panel mounting. The model number must have an
“M” selection as the 10
th
digit, example:
P54XxxxxxMxxxxx
The relays can be flush mounted into panels using M4 SEMS Taptite self-tapping screws
with captive 3 mm 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 2.5 mm.
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 IEC 60529 IP52 enclosure
protection, it will be necessary to fit a metallic sealing strip between adjoining relays (Part no
GN2044 001) and a sealing ring around the complete assembly.
Width Single tier Double tier
80TE GJ9018 016 GJ9018 032
60TE GJ9018 012 GJ9018 028
5.3 Rack mounting of panel-mount versions
Versions of the P545 and P546 that have been specified as panel-mount (10
th
digit of the
order code set to M), can alternatively be mounted in a rack frame arrangement. The relay
is mounted in a single tier rack frame (our part number FX0021 101) in an arrangement
similar to Figure 2 although for the P545 and P546, the relay will occupy the whole of the
rack.
The rack frames have been designed to have dimensions in accordance with IEC 60297 and
are supplied pre-assembled ready to use.
The two horizontal rails of the rack frame have holes drilled at approximately 26 mm intervals
and the relays are attached via their mounting flanges using M4 Taptite self-tapping screws
with captive 3 mm 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 molding if used.
The frames are fastened into the racks using mounting angles at each end of the tier.
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