Line Connection Booksize
2.8 Line connection variations
Equipment Manuel for Booksize Power Modules
2-40 Manual, (GH2), Edition 06.2005, 6SL3097-2AC00-0BP2
Please note the following:
• Only the use of a delayed-tripping (selective) AC/DC-sensitive RCCB is permitted.
• The maximum permissible ground resistance of the "selective protection device" must be
observed (max. 83 Ω for residual-current circuit-breakers with a rated differential current
of 0.3 A).
• Parts of the electrical equipment and machine that can be touched are integrated in a
protective grounding system.
• The total length of the shielded power cables used in the drive line-up (motor cable incl.
line supply cables from line filters to line feed terminals) must be less than 350 m.
• Only recommended line filters must be used during operation.
• Only one residual-current circuit-breaker may be connected in series (cascading is not
possible).
• Switching elements (main circuit-breakers, contactors) for connecting and disconnecting
the drive line-up must feature a max. 35ms delay time between closing and opening
individual main contacts.
Recommendation
SIEMENS selectively switching AC/DC-sensitive residual-current circuit-breakers to
EN 50178, type 5SZ (e.g. 5SZ6 468–0KG00 or 5SZ6468–0KG30 with auxiliary disconnector
(1NC/1NO) for rated current 63 A, rated fault current 0.3 A) (see also catalog CA01).
Notice
AC or pulse-sensitive RCCBs are not suitable.
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