Go  List

PASS

FAIL

Inrush Current

N/T

N/A

Model :

240W SFF APFC

Reference

1.      Equipment :

(1)    AC Source : Chroma model 6560

(2)    DC Load : Chroma 63102/63323

(3)    Oscilloscope : Tektronix TDS 5054

(4)    Current Probe : Tektronix TCPA400/FLUCK 80i-110S

2.      Test Condition :

(1)    AC Input Voltage :  240V

(2)    Input Frequency : 50HZ

(3)    Load Condition : Load 4

(4)    Temperature :Room Ambient Temperature( Hot  Start )/AC ON_OFF 3 cycles

3.      Spec :

Any initial current surge or spike of 10ms or less will not exceed initial inrush current peak. Any

The I2T of Input Fuse shall less 22% of component rating or depends on customer requirement.

additional inrush current surges or spikes in the form of AC cycles or multiple AC cycles greater than 10ms,

The First Inrush current will flow through bridge diode, bypass diode (if avaiable),

and less than 1150ms, must not exceed secondary inrush current peak. After 1150ms the AC input current

PFC shunt resistor (if available), so need to confirm if the device can sustain inrush current

must meet the requirements in Section 2.1 of the PSU parametric specification. The inrush due to the EMI filter

The Second inrush current will flow through PFC diode, so need to confirm if the device can

capacitors can be ignored. For any conditions during turn-on the inrush current will not open the primary input

sustain this inrush current

fuse or damage any other components.

The inrush limiting circuitry shall be designed such that if the active bypass circuitry (if applicable) is not

functional the remaining circuitry shall minimize any smoke/flame potential.

Parameter Description

Min

Tye

Max

Unit

Initial In-rush Current

110

Amps (peak)

Secondary In-rush Current

35

Amps (peak)

*The Inrsuh Current to be measured with Input Voltage at 240Vac, half load, 35degrees Celsius, burn-in 0.5 hour.

4.      Test Result :

PASS

Initial inrush (0-10mS)

Input Voltage

Input  Voltage phase angle

Test Result

Hot  Start

240Vac 50Hz

Pk  Current  ( A )

90o

100.6A

Spec (Pk  Current )

< 180A

Secondary Inrush (Start-up 10-1150ms)

Input Voltage

Input  Voltage phase angle

Test Result

Hot  Start(burn-in 0.5 hour)

Pk  Current  ( A )

240Vac 50Hz

0o

9.23A

45o

8.582A

90o

16.28A

135o

26.14A

Spec (Pk  Current )

< 180A

240Vac Initial

Cold Start

(1)AC in(2)Iin

240Vac Secondary / Cold Start

0deg

45deg

(1)AC in(2)Iin

Pk  Current  ( A )

9.23

(1)AC in(2)Iin

Pk  Current  ( A )

8.582

90deg

13

135deg

14

(1)AC in(2)Iin

Pk  Current  ( A )

16.28

(1)AC in(2)Iin

Pk  Current  ( A )

8.4

26.14