Fuji NB2W90R-11 Module

100% Brand New Module Fuji NB2W90R-11 Low Price

Description

The electrical durability test must be carried out for the numberof operation cycles specified for the corresponding intermittentduty class shown in the table on page 5, and under the circuitconditions of the corresponding utilization category as definedin the table on page 4.Contact wear is caused by arcing that occurs between contactswhen the current is interrupted. The amount of contact wear isdirectly proportional to approximately the second power of theinterrupted current value.Therefore, when a contactor is used for inching or pluggingoperations, the expected service life of the contacts will bemuch less than if used for normal operations.

The overcurrent withstand value is maximum value of currentwhich can be allowed to flow in contactors for a specifiedperiod of time which is expressed by “time-current (root-meansquare) value”.The starting current of squirrel-cage motor is 5 to 6 times thefull load current. The starting time of special purpose motorsfor blower, winder, fan and centrifugal separator having a largerotational inertia is 7 to 8 seconds, which is a longer periodthan that of standard motor with driven machine.Thus larger current than the rated operational current will beallowed to flow through the contactors for a longer time thanusual under these conditions.The graph below indicates the overcurrent withstand values forSC series contactors.

Fuji Module

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