8US1250-5AT10

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Insulated three-phase busbar systems

Three-phase busbar systems provide an easy, time-saving and clearly arranged means of feeding 3RV2 motor starter protectors with screw terminals. Different versions are available for sizes S00 to S2 and can be used for the various different types of motor starter protectors/circuit breakers (size S0 up to 32В A).

The 3RV1915 and 3RV1935 three-phase busbar systems are generally unsuitable for the 3RV21 motor starter protectors for motor protection with overload relay function and 3RV27 and 3RV28 circuit breakers according to ULВ 489/CSAВ C22.2В No. 5.

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 180В°) underneath the terminals of the respective last circuit breaker.

A combination of sizes S00 and S0 of circuit breakers is possible. The motor starter protectors/circuit breakers are supplied by appropriate feeder terminals.

SIRIUS three-phase busbar system size S00/S0

SIRIUS three-phase busbar system size S2

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" according to UL/CSA. However, special feeder terminals must be used for this purpose (see "Selection and Ordering Data").

Busbar adapters 8US for 60 mm systems

The motor starter protectors are mounted directly with the aid of busbar adapters on busbar systems with 60 mm center-to-center clearance in order to save space and to reduce infeed times and costs.

The busbar adapters for busbar systems with 60 mm center-to-center clearance are suitable for copper busbars with a width of 12В mm to 30В mm. The busbars can be 5В mm or 10В 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" в†’ "Low-Voltage Power Distribution and Electrical Installation Technology" в†’ "SENTRON Safety, Switching, Measuring and Monitoring Devices" в†’ "Busbar Systems".

SIRIUS load feeders with busbar adapters snapped onto busbars