Aug 16 (Reuters) - First Quantum Minerals Ltd FM.TO
* First Quantum Minerals provides an update on its Zambian operations
* Power supply to Kansanshi complex and Sentinel mine has been reduced 15% and 29%, respectively since afternoon of August 10
* On August 15, 2017, planned four-week maintenance shutdown of Kansanshi smelter began
* Also offered to build more capacity in interconnector from Zimbabwe to Livingstone, Zambia
* Budgeted production at both operations was maintained until august 15, 2017 prior to Kansanshi smelter shutdown