Free wheeling diode and contactor's contacts

[noreldaim]

free wheeling diode for protecting contactor's contacts..in locomotive
.
.
Is the free wheeling diode can protect the contactor contacts from opening sharp spark?
The contactor is used in power circuit of dc series motor..
We always change these contacts bcuz they aging the sysetm consist of six dc motors used in locomotive

 

[NascentOxygen]

free wheeling diode for protecting contactor's contacts..in locomotive
.
.
Is the free wheeling diode can protect the contactor contacts from opening sharp spark?

That's the general idea. The diode reduces the voltage produced when the current is interrupted.