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Dimension
drawings
and mounting
The basic model of the protection relay case is
designed for flush-mounting. When required,
the mounting depth of the case can be reduced
by using raising frames: type SPA-ZX 301 re-
duces the depth by 40 mm, type SPA-ZX 302
226
214 ±1
Panel cut-out
Fig. 6. Dimension and mounting drawings for overvoltage, undervoltage and residual voltage
relay SPAU 331 C.
The relay case is made of profile aluminium and
finished in beige.
The rubber gasket fitted to the mounting collar
provides an IP54 degree of protection by enclo-
sure between the relay case and the mounting
base.
The hinged cover of the case is made of trans-
parent, UV-stabilized polycarbonate polymer
and provided with two sealable locking screws.
The rubber gasket of the cover provides an IP54
degree of protection between the case and the
cover.
The required input and output connections are
made to the multi-pole terminal blocks on the
by 80 mm and type SPA-ZX 303 by 120 mm.
When projecting mounting is preferred a relay
case type SPA-ZX 306 is used. The relay case
for projecting mounting is provided with front
connectors.
293
259
229
30
a
Raising frame
SPA-ZX 301
SPA-ZX 302
SPA-ZX 303
rear panel. Each screw terminal is dimensioned
for one or two wires of maximum 2.5 mm
connection diagram adjacent to the terminal
blocks illustrates the connection of the termi-
nals.
The 9-pole D-type connector is intended for
serial communication of the relay. A 25-pole D-
type connector is used for connecting the dis-
turbance recorder module via the RS 232 C port
on the front panel to an output device.
The bus connection modules (SPA-ZC 17_ or
SPA-ZC 21_) and fibre-optic cables recom-
mended by the manufacturer should always be
used for the serial communication.
34
b
a
b
219
74
179
114
139
154
2
. A
17
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