ABB MNS R, System Manual, Page: 8 / 28

6 ABB SACE
Construction and functional characteristics
Instrument compartment
The instrument compartment as well
is located in the front side of the
switchgear and it is accessible by
means of a locked hinged door. It can
be dedicated to each functional unit
or be common to several ones. The
measuring instruments, protection re-
lays, control and signalling devices are
normally mounted on the door,
whereas any other auxiliary appara-
tus, such as miniature circuit-break-
ers, protection fuses and auxiliary re-
lays are placed inside the compart-
ment. Apparatus wiring is made with
flexible copper cables and arranged
in dedicated wiring channels. Each
circuit-breaker terminal blocks are
separated from the others and prop-
erly identified.
Internal compartment with auxiliary apparatus and terminal boxes
Instrument compartment with protection relay mounted on the door
ABB PC30 23-11-2009, 8:13 6