Studer Innotec XTH 5000-24, XTH 6000-48, XTH 8000-48 Recommendations for dimensioning the system

STUDER Innotec Xtender

This connection (C) is not permitted if a socket is installed upstream of the Xtender.

4.2.3INSTALLATION WITH AUTOMATIC PE-NEUTRAL SWITCHING

In certain applications, it is desirable to keep the neutral upstream and downstream of the Xtender separated (C) while reestablishing the earthing system (TN-S, TT or TNC-S) in the absence of voltage at the input. This can be programmed by the configuration {1485} via the RCC-02/03 remote control. This modification must be carried out possessing technical knowledge, at the responsibility of the installer and in conformity with the applicable regulations and standards.

This allows adherence to the requirements for an earth-neutral connection at the source.

4.3 Recommendations for dimensioning the system

4.3.1DIMENSIONING THE BATTERY

The battery capacity is dimensioned according to the requirements of the user – that is 5 to 10 times its average daily consumption. The discharge depth of the battery will therefore be limited and the service life of the battery will be extended.

On the other hand, the Xtender must have a battery capacity that is large enough to be able to take full advantage of the performance of the equipment. The minimum capacity of the batteries (expressed in Ah) is generally dimensioned in the following way: five times the rated power output of the Xtender / the battery voltage. For example, the model XTH 8048 must have a battery of a minimum capacity of 7000*5/48=730 Ah (C 10). Because of the inverter’s extreme overload capacity, it is often recommended that this value be rounded up. An under-dimensioned battery may lead to an accidental and undesired stopping of the Xtender in the event of high instances of use. This stoppage will be due to a voltage that is insufficient on the battery, subject to a strong discharge current.

The battery will be selected with regard to the greatest value resulting from the calculations set out above.

The battery capacity determines the adjustment of the configuration {1137} “battery charge current”. A value between 0.1 and 0.2 x C batt. [Ah] (C10) enables an optimum charge to be guaranteed.

The method proposed below is strictly indicative and in no way constitutes a guarantee of perfect dimensioning. The installer is solely responsible for good dimensioning and installation

4.3.2DIMENSIONING THE INVERTER

The inverter is dimensioned in such a way that the rated power output covers the power of all the consumers which will be used at the same time. A dimensioning margin of 20 to 30% is recommended to guarantee that the Xtender will work well in an ambient temperature of more than 25 °C.

4.3.3DIMENSIONING THE GENERATOR

The power output of the generator must be the same or more than the average daily power. Optimally, it should be two or three times this power. Thanks to the smart boost function it is not necessary to over-dimension the generator. Indeed, the loads those are temporarily higher than the power of the generator will be supplied by the inverter. Ideally it should not have a power output by phase that is less than half of the power of the Xtender(s) present at this phase.

The power available downstream of the inverter when the generator is working is the same as the sum of the two powers.

Installation and operating Instructions Xtender V1.3 Page 11