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Sorry for the confusion. It is based on UK standards so CSA stands for cross sectional area. The cable run is approx 50mts from the VSD to the motor and the VSD located adjacent to the MCC.

I normally use ELEK Cable Pro to calculate my cable sizes and it works very well however I have a project at the moment which has a circuit which I need help calculating the correct size cable for; The circuit is for an 18.5kw 400v motor. I have used the following Load – 18.5kw V- 400v...

Thanks gruntguru Thats exactly the type of thing I'm looking for but I'm afraid my ignorance in terminology is still causing a problem. Boiler may be the wrong description, although that's what the manufacturers call them, as I am not sure does it produce steam or just hot water. The boilers in...

Hi I don't know if this is in the correct forum so my apologies if Ive posted in the wrong place. My field is more on the electrical side and controls than on the mechanical side so I need a bit of help doing some calculations . I have two boilers, one LPG and one oil, and i need to compare...

Hi All I am not sure if this is the correct forum to post this in. If it is in the wrong one my apologies. I could do with some help with some calculations on a boiler. My area is more on the electrical and BMS side. I have a project where I have the values of a number of points on an Mbus...

I have a set up which means I have a 230V 60Hz supply. The machine is 110V 60Hz. Can I use a 50HZ transformer to step down the voltage? In other words if I put 60Hz into a traffo designed for 50Hz will I still get 60Hz out and will there be any side effects?

The meter manufacturers have told me; A+ All phase energy total Import is Imported kWh total consumption (active power) A- All phase energy total Export is Exported (generated) kWh total (active power) Q+ All phase energy total Import is Imported kVArh total (reactive power) Q- All phase energy...

The installation is in a school. The meter is int owned by the utility company and is not the meter been used for billing purposes. It was only supposed to be used to highlight any problems such as excessive loads during night time. The problem is I cant make any sense of the reading. I cant...

Hi The figures I have quoted are what you are left with after you take the reading at the start of the first 15 minute period away from the reading at the end of the first 15 minute period. If you divide these by the time period in hours (i.e. 0.25)then they still don't balance.

The meter is an Iskra MT375 3 phase 4 wire meter. I have attached the brochure for the meter. The manual is not much use however based on the software it says as follows; A+ All phase energy total Import A- All phase energy total Export Q+ All phase energy total Import Q- All phase energy...

Hi can anyone tell me if I had the following readings how could I calculate kw. The readings were taken from an electricity meter which logged the values every 15 minutes and the values below are what were recorded in the first 15 minute period; A+ Energy Total = 3920Wh A- Energy Total = 3480Wh...