Hi Gents,
I am building a custom vehicle (small lightweight 2 seater sports car) and got my hands on a EJ255. This is the 2.5 litre turbo boxer engine used in the 2006+ Subaru WRX.
Most of you will know that the WRX is AWD.
In my application, I want to have the engine either in the mid or...
Are there any kits out there that inject LPG in liquid form so that when it changes state to the gas, it removes the latent heat from the charge air (turbo application) and has the effect of cooling the intake and with high octane rating as a bonus? :) The injectors in such a system would be...
Twincharging an engine that features a screw-type supercharger (ie it already has internal compression) in my mind has the following advantages and disadvantages:
Disadvantages:
It would still feature parasitic loss when the supercharger is "bypassed" and the turbo is powering away at higher...
Hi Guys, I'm designing the earthing system at a fuel re-fill station where trucks (tankers) will be filled with a fuel
I think that the equipotential leads that earth the truck/tanker when its filling have a switch on them so that you can (I guess) control when or not the truck/tanker is...
Hi Guys, I'm an electrical engineer
Posting this in here, but if it's not the right forum, please point me to another
Issue is, that I'm involved in doing the grounding design at a type of fuel station where trucks (tankers) will be filled with a fuel
I think that the equipotential leads that...
I was just modelling a Wye-Wye Tx on SKM PowerTools and noticed that it defaults the zero sequence impedance to be 5 times that of the positive sequence impedance for a standard core type transformer.
Is there any technical basis for this?
Also, the Tx in reality has a delta tertiary winding...
Hi,
I am currently rebuilding my 3litre turbocharged engine and am looking into the possibility of twincharging it. I'd appreciate some guidance, because I'm an electrical engineer and not an automotive engineer but I have read the thread titled "twincharging estimated results" from back in Jan...
Is it true that a fault on the Y side of a DY Tx will translate upstream on the D side by the appropriate turns ratio for a 3Ph fault - however for a line to line or a single phase fault then the current seen upstream is as you would assume by multiplying of the transformer turns ratio and...
Hi,
Perhaps you can help me.
How does one determine what settings to install into a generator protection relay for the case of the thermal image protection function?
I presume it starts with the gen-set manufacturer, but what information do i request from them? Thermal overload curves?
The...
Hi,
we are putting a generator specific protection relay to protect a gen-set, and I have a few questions:
1) the gen-set is star-pointed to earth, and we have a toroid on the MEN there. Our line CT's (3) are located just above the star-point and before the gen-set. What are the advantages to...
Hi,
If you have some CT's feeding a few things in parallel, for example an ammeter, a power quality meter and perhaps another tarriff meter.
Then it seems to me that none would see the proper current from the CT as it would all be divided appropriately determined by the current division factor...
Scenario:
Say there is a small power station being fed by 10 diesel gen-sets on a common bus running at 11kV and being stepped up off the bus feeder to 22kV for distribution and somewhere on the network 22kV there is a fault to earth.
The fault current will be accompanied by a voltage dip at the...
I believe that when batteries are charged, they produce Hydrogen Gas (I am talking of the common electrolyte batteries used in trucks etc).
If these batteries are being used for a starter motor on a gen-set, and if the batteries are located right next to the gen-set itself, and if they have a...
If you have a bus with:
6 income generators
3 big mill motors fed off of it
and 1 interconnector running through a transformer to another bus
And if there is a fault on that interconnector, then to calculate the fault level I understand that you calculate the contribution of the generators, but...
We have some natural gas piping running to some gen-sets at some power stations.
The piping is metal but it has flanges and the question has arisen as to whether or not we have to bond those flanges for electrical continuity. Threats I am considering include lightning and static charge build...
Hi,
I've had to select two 20MVA transformers for some transmission lines for a project that I'm involved in and I selected off-load tap changers because an ex-colleague told me to do it before he left. These transmission lines will be feeding an old substation which in turn supplies the power...
