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Circuit Breaker/MSP 3RV1
SIRIUS System Manual
GWA 4NEB 430 0999-02 DS 01
2-49
2.5.2 Connection
Tools The following items are required to connect the circuit breakers/MSPs:
• Frame sizes S00 to S2: Pozidriv 2 screwdriver
• Frame size S3: Allen key (4 mm)
Conductor cross-sec-
tions
The typical SIRIUS conductor cross-sections apply (see Section 1.5.2 "Con-
ductor cross-sections").
Screw-type terminals 3RV1 circuit breakers/MSPs with frame sizes S00 and S0 have terminals
with captive screws and terminal washers that enable you to connect
2 conductors, even if they have different cross-sections.
The box terminals of the circuit breakers/MSPs of frame sizes S2 and S3 can
also take 2 conductors with different cross-sections. With the exception of
circuit breakers/MSPs of frame size S3, which have terminal screws with a
4 mm Allen screw, all the terminal screws can be tightened using a standard
screwdriver or a Pozidriv screwdriver (size 2).
You can remove the box terminals from circuit breakers/MSPs with a frame
size of S3 to connect conductors with ring-tongue or connecting bars. A ter-
minal cover is available as shock protection and to ensure that you comply
with the required creepages and clearances when the box terminals are
removed.
Soldering pin connec-
tor
Circuit breakers/MSPs in frame size S00 can be soldered onto printed circuit
boards by means of a soldering pin connector. A soldering pin connector is
available for the main contacts only (3RV19 18-5A) or for the main contacts
and the transverse auxiliary contacts 1NO +1NC (3RV19 18-5B).