ABB Switzerland Ltd REG 316*4 1MRB520049-Uen / Rev. C
2-4
2.2. Mechanical design
2.2.1. Hardware versions
RE. 316*4 is available in a number of different versions which
are listed in the data sheet under "Ordering information".
2.2.2. Construction
The RE. 316*4 is 6 U standard units high (U = 44.45 mm) and
either 225 mm (Order code N1) or 271 mm wide (Order code
N2). The various units are inserted into the casing from the rear
(see Fig. 12.3) and then screwed to the cover plate.
2.2.3. Casing and methods of mounting
The casing is suitable for three methods of mounting.
Semi-flush mounting
The casing can be mounted semi-flush in a switch panel with the
aid of four fixing brackets. The dimensions of the panel cut-out
can be seen from the data sheet. The terminals are located at
the rear.
Installation in a 19" rack
A mounting plate with all the appropriate cut-outs is available for
fitting the protection into a 19" rack (see Data Sheet). The termi-
nals are located at the rear.
Surface mounting
A hinged frame (see Data Sheet) is available for surface
mounting. The terminals are located at the rear.
2.2.4. Front of the protection
A front view of the protection and the functions of the frontplate
elements can be seen from Fig. 12.2.
A reset button is located behind the frontplate which serves three
purposes:
· resetting the tripping relays and where the are configured to
latch, also the signalling relays and LED's and deleting the
distance protection display when running the control program
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