Siemens SIRIUS 3RA, Equipment Manual

Page: 135 / 166

Types of coordination
A
Types of coordination
Standard DIN EN 60947-4-1 (VDE 0660 Part 102) or IEC 60947-4-1 distinguishes between two
types of coordination (type of coordination), which are referred to as coordination type "1" and
coordination type "2". In the case of both types of coordination, the short-circuit is reliably
mastered. the only differences are in the extent of the damage sustained by the device following
a short circuit.
Type of coordination 1
The load feeder may be non-operational after a short circuit has been cleared. Damage to the
contactor and the overload release is also permissible.
Type of coordination 2
After short-circuit disconnection, there must be no damage to the overload release or to any
other part. The load feeder can resume operation without needing to be renewed. Welding of
the contactor contacts only is permitted if these can be separated easily without significant
deformation.
SIRIUS 3RA Load Feeders
Equipment Manual, 02/2022, A5E03656507520A/RS-AC/004
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