Recent content by abhipatel

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    Frequency Vs Max Load current (Motor)

    ty russ...i believe the same too...how would we calculate what reduction is achieved though?
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    Frequency Vs Max Load current (Motor)

    all i want to ensure is i do not lose my blast wheel efficiency which is being run by the motor. All experts recommend running the wheel @90% to get max utilization. Blasting is controlled by amperes - with 50 HZ i can get 19-20 Amps easy (90% of 21 A) but when i bring the freq. down using...
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    Frequency Vs Max Load current (Motor)

    Have a 15 HP motor whose full load current (@ 50 Hz - India norms) is calculated at around 21 Amps. Have added a VFD (Variable Frequency drive) and would like to always run the machine @ 90% of full load current for maximum efficiency. Can anyone assist in helping me calculating full load...
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    Finding water density at 150°C and 600 psi with CO2 gas

    Can anyone please show me how to look up Density of H20 @ 150 C & 600 psi pressure (Co2)... I found a water table which shows 916.69 kg/m^3 but it does not show anything @ pressure. Isnt density related to both pressure & temp.? What would be the difference in density if No gas was there...
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    Reversing a 115V AC gearmotor with DPDT and solving overheating

    I have an AC Gearmotor W/Fan, Base Mnt, 100 rpm, 7 in-lbs Torque, 115 VAC - I need to achieve 2 purposes with it: 1. Need to able to reverse directions - can I do it with a DPDT? 2. It is overheating - how can I solve it -- heatsinks or fans? Any recommended ones -- I have never done that...
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    SSR relay not activating with microcontroller output in heating circuit

    Could you please help me in figuring how to run Line through the relay, then through the load to Neutral in the form of a schematic or maybe just edit my diagram?... I am still scratching my head and resorting to trial and errors...Thanks
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    SSR relay not activating with microcontroller output in heating circuit

    Am not much of an electrical guy but here it is in Word...see if it helps.
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    SSR relay not activating with microcontroller output in heating circuit

    Needed some guidance for my circuit: Have a circuit consisting of a microcontroller + SSR relay + load (heaters)...issue is when the temperature reaches cutoff the heaters are not getting stopped and temp. keeps on increasing... I have a connection of outputs from microcontroller into...
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    Why Does Water Boil at 155°C Under 600 psi Pressure?

    I think just evaporating because I can't see it boiling...The chamber size is quite big...and water measured would be like 100 mg max.
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    Why Does Water Boil at 155°C Under 600 psi Pressure?

    Boiling Point H20 @ 600 psi? According to the psychometric chart boiling point of water @ 600 psi is 252 C. I have a chamber with water inside (in forms of weight measured drops). I am purging CO2 at 600 psi in the chamber. After am heating the chamber to 155 deg C expecting the water to...
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    Buying - Lab Temperature Controller

    Hi I want to buy a scientific lab temperature controller with inputs for J-type thermocouple and consists of a standard circuitry of a solid state relay,controller,switch - all enclosed and pre-wired in an enclosure(plastic/metal). The purpose is not a hi-fi one so need one for a...
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    How do I draw a blueprint for adding L-shaped welds to a hollow cylinder?

    am bit confused...years since I have reviewed orthographic drawings...I have a hollow cylinder (say a pipe with inner & outer diameter) and I want to add 6 L-Shaped welds to its bottom to be able to weld it to a plate. I cannot figure out how to draw a blueprint for the same for the...
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    Connect pressure transducer o/p to gauge?

    Thanks, understand your confusion too ! The thing is the setup has outputs for a transducer but does not have a transducer so rather than spending the money to buy a new one I just wanted to connect it to a pressure gauge (cheaper one) as the intent is to only know the pressure and not...
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    Connect pressure transducer o/p to gauge?

    just some dilemma I ran into I have an experimental setup with a pressure transducer output connections (wires)...I deemed now that a pressure gauge alone will suffice. How do I connect the wires to a pressure gauge? Or do I need to re-do everything?
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    Graduate R Chart with probability limits

    Suppose we want to use probability limits with α = 0.002. What are the control limits for theX and R charts? Sample size is 5...All I want is how do we calculate R limits Solution : W 1 - α/2 = W0.999 = 5.483754 Just want to know what table he has referred to get this answer?