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What is the main difference for NS MCCB between NS1600 and the MCCB NS1600b ?

There are some main differences between the MCCB of types NS1600 and NS1600b even if both are of rated Current 1600 A but the differences are:

1- The NS1600b is always Manually operated, can not be operated with Motor Mechanism while normal NS1600 is either manual or motorized
2- The NS1600b is always fixed and can not be withdrawable while the normal NS1600 is either fixed or withdrawable
3- The frame size of NS1600b is bigger than that of NS1600
4- Differences in available breaking capacities Icu at different operating voltages

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