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Hello again, Thanks to all respondants so far. An update...The plot has thickened a bit! I've managed to take some current readings today during a "moderate" batch load, and here's what i've found - 1/ The incoming supply lines are reading = 38A avg. 2/ The bottom side of the Line contactor =...

Hi Guys, Thanks for the quick reply and for your input so far. skogsgurra : I actually took the cold winding resistances this morning, but we had no production today. I'll try to obtain a "warm" reading tomorrow. I can easily do a surface temperature test, but a winding temp. test may be...

Hello, I hope things are well in your part of the world; just a long winded post to verify a few things... We have two mill motors (on a multishaft disperser) currently being started in a star/delta arrangement. The production bosses want to put a larger diameter "blade" on the end of each...

Hello jherbert, Thanks for the tips and i can say I agree on a lot of the points you have touched on. I'll elaborate on a few of the issues you've raised - - a mechanical engineer should take look at the design. Pocko : Fully agree, will be done when we have a bit more "data" to put forward...

Hello, Thanks for your input. If i'm grasping things correctly, the "raw" integer will be fed into the PID block as the PV. The SP minimum (say 150kPa) and SP maximum (say 450kPa) values are set in the PID control block inside the the plc, as is the desired SP (say 400kPa). Wouldn't the CV...

Hello All, This is going to be a bit long winded, but I'll try to give as much information as possible!! I'm a humble electrician and I've have been placed in a plant and have been asked to look at making some process modifications to more efficiently control our pumps. The place has...

Hello All, This is going to be a bit long winded, but I'll try to give as much information as possible!! I'm a humble electrician and I've have been placed in a plant and have been asked to look at making some process modifications to more efficiently control our pumps. The place has been...

Hello all, I'm after some opinions on the following logged readings i get when "tonging" the current drawn by an induction motor on start up. The motor is directly coupled to a centrifugal fan mounted inside the duct work of a dust extraction system. The motor's plate rating is 72.2 A FLC. 3...