Teknel Srl

The generators can be used for two main service types:

1 - Generators for continual use:

These are used to produce electricity where the public distribution network does not exist or where the user has opted to produce his own electricity directly, taking advantage of the heat emanating from the electricity power station;

2 - Generators for emergency use: 

These are used to compensate for any accidental power cuts in the distribution network, when said cut may cause serious problems for people or materials, or financial damage (hospitals, continuous-cycle industrial factories, etc.).

The generator will have different characteristics depending on these two configurations, particularly in the switch board and control panel functions which are compulsorily automatic in the second case.

An important part in choosing a generator is its nominal power: this is expressed in kVa and the relative numeric value, written on the plate, represents the maximum power value that the machine can supply in the environmental conditions in reference.

It is important to bear in mind that the value of power reported is that defined as PRP (First Power) in regulation ISO 8528.

To simplify the definition given by said regulation, PRP is the maximum power supplied by the generator during a variable-power work cycle.

Normally the generator can cope with around a 10% surcharge on the above-mentioned power limit, for no more than 500 hours annually, and for a maximum of 300 continual hours.

Said limit represents the peak power or LTP (Limited Time Power).

Other significant characteristics are the electrical ones: tension (monophasic or three-phase with the relative value), frequency in Hz (closely linked to the number of revolutions of the engine and the number of poles of the alternator) and the cosfi power factor which represents displacement between the tension vector and the current intensity vector.

The latter is conventionally engaged at 0.8: therefore 1kVA = 0.8 electrical kW.

Another fundamental factor is noise, normally expressed in dB (A) or rather decibels according to the A scale (human ear sensitivity), measured at seven metres in an open field.

For this reason, the generators are covered with soundproof covers or placed within special shelters designed for their high sound-proofing capacity.