A detail here, a detail there ...and suddenly the picture becomes clear!
It seems, from my observations, that there are two types of drives: Automation Direct, and everyone else.
Look at the ratings. Just for giggles, let's say a particular drive is rated at 17 amps. With most drives, an occasional, minor overload - say the machine hangs up for a moment - and everyone else rides it out.
Automation Direct, by comparison, is calibrated to a fine degree than any fuse, and will fry the instant any parameter is exceeded, by the least amount.
The key here is PROPER selection. Now, my last employer had a corporate doctrine of pushing things .... for example, cranes that were rated for 14 tons were used to lift maximum loads dozens of times per hour, rather than the 6x/hour the rating was based on. As a result, their maintenance issues were a lot more than they should have been - and the maintenance personnel thought the equipment was 'low quality.' No, it was being abused.
