Three phase input switch mode Power Supply

S8PE

L-105

Notice

Three phase input operation when one phase is missing

The S8PE will in most cases continue to operate even after the loss

of one phase of the supply. The perfor mance specifications are of

course not guaranteed under these conditions. As the loss of one

phase puts additional stress on some components, the life span of

the unit could be shortened. It is prudent therefore to regularly check

for signs of the following possible conditions.

1. Input terminals wiring open/loose.

2. Incorrect / no voltage on one or more phases of the supply.

3. Abrupt or periodical loss of input voltage.

Three phase input switch off

In order to switch off the Power Supply completely: all 3 phases need

to be switched off.

Mounting

To improve and maintain the reliability of the Power Supply over a

long period, adequate consideration must be taken to heat radiation.

The S8PE is designed to radiate heat by natural air cooling, there-

fore, mount the S8PE so that enough air flow takes place around the

power supply.

If installing S8PEs closely, keep the minimum dis tance of 10 cm at

50 °C ambient, 5 cm at 20 °C am bient.

Generating (

±±±±) Output Voltage

An output of

± can be generated as shown below, since the S8PE

has a floating output.

Serial Operation

As shown below, the output voltage from each S8PE can be added.

Types must be the same.

Parallel Operation

As shown below, The Power supply can use for paral lel operation.

All the output voltage of each S8PEs should be exactly the same.

Also, make sure that the thickness and the length of all wires con-

nected to the load are the same to ensure that the wires will have no

voltage drop difference. Types must be the same.

+ V

− V

+ V

− V

+V

−V

+V

−V

+ V

− V

+ V

− V