PM645B 3BSE010535R1 ABB Processor module industrial control automation controller

Product Details

Product Description

Product Description
PM645B 3BSE010535R1 ABB Processor module industrial control automation controller
PM645B 3BSE010535R1 ABB Processor module industrial control automation controller
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Each switch disconnector shall be protected by a coordinated device which
safeguards it against overcurrents, usually a circuit-breaker able to limit the
short-circuit current and the let-through energy values at levels acceptable for
the switch-disconnector.
As regards overload protection, the rated current of the circuit-breaker shall be
lower than or equal to the size of the disconnector to be protected.
Regarding Isomax and Tmax series switch disconnectors the coordination tables
show the circuit-breakers which can protect them against the indicated
prospective short-circuit currents values.
Regarding Emax series switch disconnectors it is necessary to verify that the
short-circuit current value at the installation point is lower than the short-time
withstand current Icw of the disconnector, and that the peak value is lower than
the making current value (Icm).