Ditto the above - so long as we are talking about a centrifugal pump. Try running a positive displacement pump with a shut-off discharge or intake and you can do some serious damage.
Fans and centrifugal pumps increase their current draw when asked to do more work - i.e. move more air or water. Move less, and there is less current draw. Big pumps are routinely started with a shut-off head, just to minimize the current draw during startup.
If reducing flow (reducing load) does not reduct current proportionally, then there is a mechanical problem with the pump / motor assembly causing binding or friction. That calls for a rebuild or at least some detailed service work.
Welcome to the board JValdes.
Radar
