(1)

To choose suitable Current for Module

          The marked current of module is the maximum allowable current in normally working conditions. Considering thyristor’s low ability of anti current impact, we sincerely suggest you keep some surplus when choosing module.

Resistance load: marked current of module should be two times as high as rated load current 

Inductance load: marked current of module should be three times as high as rated load current.

(2)

Aequirements on Conduction Angle

          At small conduction angle (namely, high input voltage and low output voltage), the output current of module is high. This will make module heat or even burn. Because if it is not sine wave, the ordinary meter will not show virtual current value.

Therefore, though displayed current on meter doesn’t exceed marked current, yet effective value is often several times higher than marked value. For this reason, module should operate at a bigger conduction angle( higher than 100 degree). About the maximum allowable output current ratio in different output voltage, please refer to the following table 3.

Us : Real output voltage of module

Ub : Maximum allowable output voltage of module 

I s: Real output current of module 

I b: Marked maximum current of module

I.E. for 100A three phase AC module, electric network 380V, the maximum output current in different output voltage as below.

(3)

Requirement on DC12V Regulated power supply

1) requirement on DC12V regulated power supply: 12±0.5V, ripple voltage<10Mv.

2) the current of DC12V regulated power supply must be 2 times higher than the real operation current or more.

3) If we use transformer type rectifying regulated power supply, the filtering capacitance must be higher than 2000ìf/25V.

4) don’t connect the polarity of DC12V power supply reversely. Otherwise, the module will burn.

(4)

Service Condition

1) ambient temperature: 25 o C~45 o C

2) environment: try, ventilation, no dust, no corrosive gas

(5)

Other Requirements

1) because eduction of main circuit bends 90 degree and is easy to break off, please avoid

external force or cable’s gravity pull up electrode and then break.

2) strictly prohibit springing copper wire on the electrode directly without any connecting terminal. This can avoid bad contact and heating.

3) module cannot be used as disconnect switch. In order to guarantee safety, an air switch should be added in the front of module.

4) when measuring working temperature of shell, test point should be chosen on the surface of heat sink near to the center of module’s bottom plate. We can dig a hole below surface to the center of heat sink, then insert the thermometer’s probe to the bottom of hole. The temperature of test point should be =80 o C.