P
G'Day List
We have 200 large 415vac 50hz 3 phase induction motors employed at a coal prep plant.
3 core + E Aluminum core cables are run to these motors, sizes vary 185mm to 300mm and some drives have two cables in parallel. Over the last 10 years, possibly 10 drives have had overheating connections at the motor, causing damage to the
motors and cables, plus plant downtime.
In this time a program was taken to open each motor j/b, inspect for damage, re-crimp each lug, this is time consuming. The substations are inspected by thermal imaging on a 12 month
period and proved a godsend to minimising problems. This problem is raising its ugly head again, the problem is we can't or won't remove the covers with the motors running, so any ideas to address the possibly of locating hot connections before they destroy the tails inside the j/b would be appreciated.
Regards
Phil Dryburgh
[email protected]
We have 200 large 415vac 50hz 3 phase induction motors employed at a coal prep plant.
3 core + E Aluminum core cables are run to these motors, sizes vary 185mm to 300mm and some drives have two cables in parallel. Over the last 10 years, possibly 10 drives have had overheating connections at the motor, causing damage to the
motors and cables, plus plant downtime.
In this time a program was taken to open each motor j/b, inspect for damage, re-crimp each lug, this is time consuming. The substations are inspected by thermal imaging on a 12 month
period and proved a godsend to minimising problems. This problem is raising its ugly head again, the problem is we can't or won't remove the covers with the motors running, so any ideas to address the possibly of locating hot connections before they destroy the tails inside the j/b would be appreciated.
Regards
Phil Dryburgh
[email protected]