Insulated three-phase busbar systems

Three-phase busbar systems provide an easy, time-saving and clearly arranged means of feeding 3RV1 motor starter protectors/circuit breakers with screw connection. Different designs are available for sizes S00, S0 and S2 and can be used for the various different versions of motor starter protectors/circuit breakers. The 3RV1915 three-phase busbar systems are not suitable for 3RV11 motor starter protectors for motor protection with overload relay function.

The busbars are suitable for between two and five motor starter protectors/circuit breakers. However, any kind of extension is possible by clamping the tags of an additional busbar (rotated by 180°) underneath the terminals of the respective last circuit breaker.

A combination of circuit breakers of the different sizes S00 and S0 is possible. Connecting pieces are available for this purpose. The motor starter protectors/circuit breakers are supplied by appropriate feeder terminals.

3-phase busbar system SIRIUS, size S00

SIRIUS three-phase busbar system size S2

3-phase busbar system SIRIUS, with example for combining sizes S00 and S0

The three-phase busbar systems are finger-safe. They are designed for any short-circuit stress which can occur at the output side of connected circuit breakers.

The three-phase busbar systems can also be used to construct "Type E Starters" of size S0 or S2 according to UL/CSA. Special infeed terminals must be used for this purpose however (see "Ordering data").

Busbar adapters 8US for 40 mm and 60 mm systems

The motor starter protectors are mounted directly with the aid of busbar adapters on busbar systems with 40 mm and 60 mm center-to-center clearance in order to save space and to reduce infeed times and costs. Busbar adapters for busbar systems with 40 mm center-to-center clearance are suitable for copper busbars with a width of 12 mm to 15 mm, while those with 60 mm center-to-center clearance are suitable for copper busbars with a width of 12 mm to 30 mm. The busbars can be 4 to 5 mm or 10 mm thick.

The motor starter protectors/circuit breakers are snapped onto the adapter and connected on the line side. This prepared unit is then plugged directly onto the busbar system, and is thus connected both mechanically and electrically at the same time.

For further busbar adapters for snapping on direct-on-line and reversing starters, and for further accessories, such as incoming and outgoing terminals, flat copper profiles, etc. see "Building Control" > "Low-Voltage Power Distribution and Electrical Installation Technology" > "SENTRON Safety, Switching, Measuring and Monitoring Devices" > "Busbar Systems".

SIRIUS load feeders with busbar adapters snapped onto busbars