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Okay thanks for your help cdafd. Is there a standard time for the tank to last?

Supplying hose reels only? Yes. Need water to protect buildings ?? The hoses are used just for trained personel to tackle small fires. Need water for fire sprinkler systems??? No we have a seperate tank and pump for the sprinklers. Any ahj that might set the demand?? Fire pump involved...

Hi, I need to size a tank that will supply a pump that will pump water to a number of hose reels around our site. What information do i need to enable me to calculate the tank size? Thanks Clarke

Thanks comokid the filter typically runs at 13millibars obviously this changes between clean and dirty but for the purpose of what i was doing i used a 0 to 15mbar guage and then set the switch to sense if the pressure dropped below 13mbar. There was no cange of pressure shown on this gauge when...

i need to detect when dust is present in an exhaust stack and was wondering if anyone knows of any probes or sensors that could be used. I have heard of using triboelectric sensors but these are exspensive and seem to be abit ott for what i want. I have tried using a differnetial pressure switch...

Hi can anyone tell me how to set up a picture to pop up in screen of a wincc project when triggered by an incoming alarm.

Hi, How do open an excel spreadsheet/workbook from wincc and then enter data into specific cells, also how can i change to a differrent sheet in the same workbook. Iam using version 5 of wincc. Thanks in advance for any responses Clarke.

We Have a conveyor installed outdoors with a 3 phase supply to motor and stop/start push buton station, my question is are there any special requirements for 3 phase outdoor supplies i.e rcd protection and earthing, like single phase domestic supplies??

Thanks for that volts/Zs Excellent

Can anyone tell me the calculation for prospective fault current for the intake of a house. Thanks in advance. Colin

Can any one tell me how to tranfer information from wincc into an excel file, all I understand at the moment is that it will be in .csv format.

Hi I have a number of product scales that I need to take the flow rate from. I am using an s7-400 plc, there are several different types of scale a number of them can easily be connected to profibus, but other older versions only have a 240v pulse output each time they tip which at the moment...

it is driven by an electric motor. The motor load does drop when a screen bursts but this also so happens when other things happen within the grinder so we are looking to isolate a screen burst some other way. The material is maize.

Has any one had any experience with siemans and hart protocol, I need to get some info from a steam flow mass probar but dont know where to start

we have a machine for grinding product, when the machine grinds the finer product passes through a screen with the larger product passsing out of the end of the machine. If the screen gets a hole the larger product contaminates the finer. My question is does anyone know of a sensor that could...

I need to get to the program though ethernet

I want to connect my laptop to our s7 400 plc through our ethernet network, I know it can be done because our contractor uses this method. The problem im having is setting up the siemens netpro (I think thats what its calle) software for my ethernet connection. Can anyone help

We have a large machine with two discs rotating at high speed, to shut down the machine if it becomes unbalanced a vibration switch is to be fitted. I have to send a signal to an s7 plc via an et200 rio panel to signal that the vibration switch has been triggered. Is it o.k to let the plc...

We are looking to upgrade are existing modicon quantum plc to a seimens s7-400 plc is there anyway to transfer the program directly to step7 or will I have to re-write the whole program. We currently program the modicon plc using modsoft 2.6.

can anyone tell me what types of maintenance should be carried out on an electrical maintenance schedule. I realise that a lot depends on the plant you're maintaining but im just looking for a general guideline. hope you can help