Hi,
We have an induction heater, like a stove top one, not industrial.
I want to understand what happens when an additional load is added that it isn't intended to receive.
A plate goes on the induction warmer, it gets heated up, then removed and another plate takes it place.
What happens if the...
So the question was based around solving the problem as cheaply as possible, more than anything else. In the image, the circles seemed equal to me. Assuming they were not, and that 11 was slightly smaller than 10?
A question was posed to me with the following diagram. http://imgur.com/6ltYKd5
11 Sprinklers, in series with identical heads, but 10 and 11 displaying a much smaller spray pattern.
1. Is this possible, and under what circumstances.
2. What would a good solution be to prevent this?
My...
Hi Jim. Thanks for the reponse. Unfortunately, that was not the answer I was looking for. As it's an aluminium melting furnace, with 2 tons of Aluminium inside, I believe the time delay factor is out of my hands, as it honestly takes ages for even full power to adjust the temperature ever so...
You can see the kW has stabalised, but using the same average. The KVA value however at the exact time I changed the PID sampling time shot up.
I can only think that because the drive is now staying on constantly and never turning off there is constant switching to keep the power at 20%. Before...
Graph
This is using an Elster 3 phase meter, integrating over 5 minutes. The KVAh term is just me looking at what the KVA has been doing over the previous hour.
Hi Guys,
So we have a melting furnace that is melting Aluminium. After 2 days of holding a melt to see how the furnace performs in a holding situation, I changed the PID control to have a longer sampling time and hence smoother control. What I noticed was the KW seemed to drop, although the...
Hi,
I have attached a simple diagram. The control gear is all correct. It was the neutral at the back. The motor and contactors would not come on until we gave a neutral. To check that we had this problem connecting one of the neutral lines in the control panel to Earth solved all the...
Ok, so if 2 phases are connected through 2 separate resistive elements to neutral, i.e. 2 relays, but now the neutral had no star point reference, the neutrals on the other side of the relays ate joined, but reading high and this can give the false reading between phases?
Maybe I'm...
Yeah... I know the motor is stuffed, what I'm trying to figure out is the cause? Could the fact that no neutral was present, but that through some elements a neutral was connected which would have pulled the neutral high, and thus throw off the values between phases, have caused the burnout?
Hi,
We installed a chiller unit that had a working compressor. We turned it on, but nothing worked, after some fault finding, we found in the main panel, also newly installed, the neutral bridge was missing. This created problems as the neutrals on the chiller then created false highs on...
Thanks, I understand what you are saying. It would then be best to redo the test making sure the probe was referenced from Neutral. Would it make any difference if it were referenced to earth?
Hi,
I think I am correct, but just wanted to check. We have some furnaces and I want to work out what power they run at. I have a scope with a current clamp and voltage probe. I have set the scope to read out power and power factor. That is where my problem lies, I think. I should have set...
Ok, I know there is the argument about switching off/on a geyser versus the leaving it on all day argument, let's argue that for specific set of circumstance I have found out that the turn off method is saving me money. This choice now seems to have me in two minds. 1 is to keep the geyser on...