Three-phase Input Switch Mode Power Supply

S8VT

3

Engineering Data

■ Definition of Inrush Current, Start up Time and Hold Time

■ Overload Protection

The Power supply is provided with an overload protection function

that protect the load and the power supply from possible damage by

over current. When the output current rises above between 105 to

130% (105 to 120% for the 40 A model) of the rated current, the pro-

tection function is triggered, decreasing the output voltage. When

output current falls within the rated range, the overload protection

function is automatically cleared.

■ De-rating Curve

For UL and CSA the maximum temperature is 60°C

(70°C for the 20 A model)

■ Overvoltage Protection

5 A and 10 A models

If output voltage exceed the rated voltage more than 25% (50% at

maximum) by some reason, then an auxiliary feedback circuit will

operate limiting the output voltage for safety.

20 A and 40 A models

If output voltage exceed the rated voltage more than 25% (50% at

maximum) by some reason, then the output voltage will be turned

OFF automatically for safety. To restart the S8VT, turn OFF the input

voltage, wait few minutes, then apply the input power again.

Start up time

Hold up time

Inrush current input application

Input ON

Input OFF

AC input

voltage

AC input

current

Output

voltage

95%

90%

P

Pmax

50%

60

70 °C