Siemens SIRIUS 3RH Series, System Manual

Page: 437 / 786

SIRIUS 3RV2 motor starter protectors
4.9 Accessories
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
437
4.9.11 Insulated 3RV19 3-phase busbar system
4.9.11.1 Description
Insulated 3-phase busbar system
The 3-phase busbar systems provide a straightforward, time-saving, and transparent means
of supplying power to 3RV2 motor starter protectors with screw terminals. They can be used
for the various types of motor starter protector.
Note
Exceptions
The 3RV19 15 3-phase busbar systems are generally unsuitable for 3RV21 motor starter
protectors with overload relay function and for 3RV27 and 3RV28 circuit breakers
conforming to UL 489/CSA C22.2 No.5-02. Neither can they be used with the 3RV2928-1A
disconnector module.
Extending the busbars
The busbars are designed for between 2 and 5 motor starter protectors. They can be
extended at will by clamping the terminal lugs of a second busbar (rotated by 180°)
underneath the terminals of the last respective motor starter protector on the first busbar.
Combination of sizes S0 and S00
It is possible to combine motor starter protectors of different sizes. Power is fed in via
corresponding infeed terminals.
Touch protection and short-circuit stress
The 3-phase busbar systems have finger-safe shock protection. They have been
dimensioned to withstand the level of short-circuit stress that can occur on the output side of
the connected motor starter protectors.
Type E starters
The 3-phase busbar systems can also be used to build "type E starters" in size S00, S0
according to UL/CSA. However, special infeed terminals have to be used for this purpose.