Dear Kritsana
Sorry for the delay in replying
1. In order to be able to offer an alternative we need the complete datasheet for the product or the application and relevant configuration details.
2. Is not possible to put the NC pole in the middle as it would create a torsion on the shaft not manageable
3. We can increase the fixing for contactor TADN 1600 from 750mm to 800mm
but we cannot reduce for TADN 3000 from 950mm to 800mm
4. Enclose the manual MI9560761
At your disposal for any further need.