Hi everybody
I'm hoping you can help me with a project i need to do in my workshop.
Not having the luxury of 3 phase, i can't invest in the ideal large Air Compressor plant i'd like to, so instead i have 2 x 240v Single phase compressors, each with their own air tank and pressure isolator switch.
For those not familar with that device, it is merely a double pole switch that turns on when the tank fed pressure valves senses air use down to a certain lower limit, triggers on to make air, and cut out again at the high limit. They also have an outright manual on/off plunger switch normally on top
they can be seen very simply here
as you can see they are simply supply and load double pole contacts, controlled by the pressure spring trigger.
Now, because of my heavy usage of air, it can really push on the compressor duty cycle, so having 2 of them, i would like to have an automated changeover so that they cycle the make air duty between them, giving them both adequate cooling periods whilst the other is active.
Have i explained that well enough?
So from the beginning, at the point of using air, the pressure in Compressor Tank A drops, and triggers the motor pump to make air. At reaching its air made level, the pressure switch turns off Motor A, but in doing so triggers a changeover so that the next compressor to make air will be Compressor B, and then reversed again, so the compressor cycle to make air will always be A B A B A B A B A etc etc etc
I'm sure you are all far smarter than I am at the electronics, relays, circuits etc, but i am an able and competent person of certain abilities, but forgive me if i had instructed granny how to suck eggs!
I hope i've made the project clear, and i thank you in advance for any help and advice you can offer me
Cheers
Shrew
I'm hoping you can help me with a project i need to do in my workshop.
Not having the luxury of 3 phase, i can't invest in the ideal large Air Compressor plant i'd like to, so instead i have 2 x 240v Single phase compressors, each with their own air tank and pressure isolator switch.
For those not familar with that device, it is merely a double pole switch that turns on when the tank fed pressure valves senses air use down to a certain lower limit, triggers on to make air, and cut out again at the high limit. They also have an outright manual on/off plunger switch normally on top
they can be seen very simply here
as you can see they are simply supply and load double pole contacts, controlled by the pressure spring trigger.
Now, because of my heavy usage of air, it can really push on the compressor duty cycle, so having 2 of them, i would like to have an automated changeover so that they cycle the make air duty between them, giving them both adequate cooling periods whilst the other is active.
Have i explained that well enough?
So from the beginning, at the point of using air, the pressure in Compressor Tank A drops, and triggers the motor pump to make air. At reaching its air made level, the pressure switch turns off Motor A, but in doing so triggers a changeover so that the next compressor to make air will be Compressor B, and then reversed again, so the compressor cycle to make air will always be A B A B A B A B A etc etc etc
I'm sure you are all far smarter than I am at the electronics, relays, circuits etc, but i am an able and competent person of certain abilities, but forgive me if i had instructed granny how to suck eggs!
I hope i've made the project clear, and i thank you in advance for any help and advice you can offer me
Cheers
Shrew