Generator standards ((IEC etc) require them to be designed and constructed to withstand a sudden three phase short circuit across the generator terminals.
This is the worst case they will see in service as downstream faults will not be as severa as the fault current will be limited by system...
Well, the document should say
The ISO rating standard for reciprocating internal combustion engines is ISO 3046; the standard for generating sets is ISO 8528
Both have several parts, 3046 is a core and satellite type standard: the corresponding definitions are in ISO 15550
I agree with cat serveng
Base load sets like this should have closed air circuit generators.
It is too late now to retrofit an external cooler.
This is an engineering problems which must be managed. The electrical fault may not be the result of contamination... This time!
Contamination of generator or motor windings is never good!
Get your local repair company to repair the winding, if there is no other damage.
You need to agree a programme of removal of the generator on a regular basis for washout and baking (heating in an oven) etc.
What was the duty...
As a design concept the delicious is a star! If you look carefully at the moving diagram, the lower crankshaft rotates in the opposite direction to the other two!
I I think that engines of this era suffered from poor detail design, compared with modern finite element methods etc.
Traditionally the manual mode was for commisioning and fault finding. One could put into manual mode if the auto section failed. There were the dangers as stated above.
Nowadays we have reliable electronics and the need for manual mode is lessened. the is also the danger of unwary operators...
With modern turbocharged spark ignition gas engines, the load acceptance can be very poor compared to a direct injection compression ignition Diesel engine.
Very often they come with a dedicated engine controller, and do not have a separate governor.
Think of where the power comes from to...
MJCronin
The water industry in the UK is pretty hot on health and safety and good design practice. They used to be nationalised (state owned) but were privatised in 1989.
They still have common standards (WIMES) for electrical and mechanical systems: www.pumpcenter.com
Could not find any...
My reference to '1000 litres above was incorrect, it is a little off topic, but I thought that I would correct it. The requirement for a bund or drip tray comes in at 201 litres. I'm thinking of the older regulations..
I think that this is a common sense link to the capacity of a standard oil...
Belly tanks (aka baseplate tanks) are very common on smaller sets, due to trying to make use of all the space.
It also enables any spills to be collected in the base of the enclosure.
From memory, oi tanks of less than 1000 litres do not need to be bundled if the tank is a day tank and it is...
Diesel fuel can be returned hot to the tank. This is often 'surplus' fuel from the fuel injection system, and some engines use fuel to cool the injectors.
This is returned to the 'day' tank (baseplate tank on smaller engines), and mixes with the existing fuel. Some engines have a small heat...
CuriousElectron
In theory you could re-use the original copper. but getting all the old insulation off would be too many man-hours (too expensive), also you would have to repair any damage to the copper from the fault current.
When I was involved in this some years ago, we often replaced the...
