Can we connect two overload relays in parallel for the same motor?
Two overload relays in parallel may not share current equally. The trip current will not be reliably known. The overload should be selected and/or adjusted to match the motor's rated continuous current otherwise it will not protect the motor in case of continuous overload. If "range 4 to 10" means the overload is adjustable to trip in that range, it should be fine for peak starting current of 17.5 amps unless that current is sustained too long. If the motor takes a long time to start, a slower time-constant overload could be used otherwise, the motor power rating is not high enough to reliably start the load.