Eltek Valere UNV-F 2.5 Instrukcja Użytkownika Pobierz pdf (Strona 20)

DC Controller

UPC4 Master

User Manual

Page 20/100

4.3 Battery backup systems

4.3.1 Temperature controlled output voltage

(Float charge of batteries in backup systems)

0°C 40°C T [°C]

U [V]

20°C

Figure 6. Diagram “Output voltage depending on temperature”

For this operation mode a temperature sensor of type KTY 81- 220 which is connected to a Basic-

Unit B

U is necessary.

The temperature information provided by the temperature sensor is analyzed by the UPC4 according

to the volt

age/temperature characteristic line. The output voltage for the CAN-Bus connected

rectifiers are controlled accordingly. This characteristic line linearly proceeds in an adjustable range

(e.g. 0°C…40°C) and is constant beyond this range (see illustration). The steepness of the characteristic

line is adjustable as the charge voltage difference, related to one battery cell and one degree C is

changed. The charge voltage difference of a lead acid battery is -2mV per cell and per °C by default.

(For details please see section 6.4.6 Battery

)

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Eltek Valere UNV-F 2.5 Instrukcja Użytkownika Strona 20