HOSE-ELBOW 6N8400 - Caterpillar

Illustration 1 g01059155
Now we have established that to produce 100 KW from a 90% efficient generator, 149 horsepower will be required. This does not include any capability for overload.The D342 N.A. Electric Set Engine, set for 1236 rpm high idle and 1200 rpm full load, has a factory rack setting of 0.180. This produces a parallel operation rating of 170 horsepower without fan. The engine is then capable of driving a 90% efficient generator with the following rating (again without including any capability for overload):
Illustration 2 g01059161
Actually, this engine is capable of powering a generator rated at 114 KW. Standard generator ratings do not include a 114 KW rating, so a 100 KW generator will be used. This also gives the unit a capability for small overload.The nameplate data for this sample generator are:
Illustration 3 g01059169
Considering these items one at a time; first, KVA is equal to the rated voltage times the amperage times 1.732 (or required for three-phase "8730;3" -- a constant required for three-phase generator) divided by 1000 (because KVA means 1000 VA).
Illustration 4 g01059171
In the illustration, note that for either leading or lagging power factor loads at time (T), voltage is at its peak (A) and current is less than peak (B). KW (or true power) is then the result of voltage (A) times current (B), whereas KVA (or apparent power) is equal to peak voltage times peak amperes, therefore, it can be seen that KW equals KVA only at unity power factor.Using the nameplate information, The KVA for this particular three-phase generator would be:
Illustration 5 g01059174
As previously stated, KW equals KVA times power factor. Therefore, the KW output of this generator equals 125 x 0.8 or 100 KW. One can readily see that, at unity or 1.0 power factor, KVA would equal KW. Further investigation of power factor would reveal it to be, "The ratio for expressing what part of the apparent power (KVA) flowing in an AC circuit is true power (KW) ",or "P.F. = KW/KVA".Power factor can be either leading or lagging depending on the load. Illustration 4. A leading power factor can be caused by an excessive amount of capacitors connected to the load, a lightly loaded synchronous motor, or an induction motor being driven by its load. Lagging power factor loads are comprised mostly of induction motors. Unity Power factor loads are composed of electronic devices and resistance loads such as lights and heaters.Standard industrial generators are rated 0.8 P.F. lagging since the average industrial load includes motors and other equipment, which operate at this power factor. The maximum value for power factor is 1.0 and the minimum is 0.0. The most common value range is from 1.0 to 0.8 (lagging). Leading power factor information is also included here although it will seldom be encountered in practice. The letters in the column of the table labeled "GRAPH LINE" furnish a cross reference between the tabulated data and the information in the graph.
Illustration 6 g01059176
The Chart is showing how power factor affects engine and generator loading. The