- The OLR and MCB both are depends upon the current range.
- But why we are choosing both devices for single machine ?
- For Example : MCB have the 70 Amps (rated) 90 Amps (MCB) means at a time of 90 Amps only it will trip. But heat is increased and machine get damaged.
- But in OLR coil strip will cut at a time of more heat. So, No need for current range.