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BETA Protecting
Residual Current Protective Devices
Busbars
2/31
Siemens ET B1 · 10/2008
2
*
You can order this quantity or a multiple thereof.
■
Overview
4-
pole 5SM3 RCCBs are bus-mounted either together or in
combination with miniature circuit breakers. RCCBs with an
N wire connection on the left-hand side facilitate installation
because normal busbars are used, as those used for miniature
circuit breakers.
Busbars are available in 10 mm
2
and 16 mm
2
.
The extremely flexible 5ST3 6 busbar system with fixed lengths
enables installation in any length as the busbars can be over-
lapped.
No further need for time-consuming tasks, such as cutting, cutting
to length, deburring, cleaning of cut surfaces and mounting of
end caps.
Any free pins on the busbars can be made safe by covering with
touch protection.
If several RCBOs are bus-mounted together, this is implemented
with two-phase busbars, which are used as 1+N busbars.
■
Benefits
•
Connection of miniature circuit breakers to 4-pole RCCBs with
N connection right and three-phase busbar, using busbar
specially designed for this application. No cutting or end caps
required.
•
Connection of miniature circuit breakers to 4-pole RCCBs with
N connection left, with three-phase busbar that can be cut. No
need to stock-keep additional items and busbars that are al-
ways available.
•
Connection of 1P+N RCBOs with two-phase busbar.
No cutting or end caps required.
•
Bus-mounting of RCCBs on busbar (three-phase +N) that can
be cut. A proven and frequently used application
© Siemens AG 2008