Ø  Universal AC input range(85~264Vac) Ø  Support 1+1 or N+1 redundant system（suggest to use redundancy modules.） Ø  Built-in active PFC,PF≥0.98 Ø  High efficiency up to 94.5% Ø  Built-in current sharing function Ø  Built-in current limiting circuit Ø  Output protections: OVP/OLP/SCP/OTP Ø  Wide operating ambient temp (-25℃~70℃) Ø  Altitude up to 6000m Ø  150% peak load capacity Ø  Easy Fuse Tripping due to High Overload Current Ø  Built-in DC OK relay contact Ø  Remote control output voltage Ø  Internal fault diagnose through LED light Ø  Can be installed on TS-35/7.5 or TS-35/15 Ø  100% full load burn-in test Ø  PCB soldering side with conformal coating Ø  Suitable for critical applications Ø  Ultra-slim,140mm width Ø  Free air convection Ø  3 years warranty SPECIFICATION                                               MODEL DG-960-24 ABS-75-12 DG-960-48 OUTPUT DC Output 24V 48V Rated Current 40A 20A CurrentRange    Note 1 0~40A 0~20A Ripple and Noise  Note 2 0~70℃ ≤240mV ≤480mV -25℃ ≤480mV ≤960mV Voltage ADJ. Range 24~28V 48~54V Voltage Accuracy ±3.0% Line Regulation ±0.5% Load Regulation ±1.0% Set-up Time <1S@230VAC <2S@100VAC full load Hold up Time ≥20mS(230Vac input, Full load) Temperature Coefficient ±0.03%/℃ Overshoot and Undershoot <5.0% INPUT VoltageRange   85Vac~264Vac, 220Vdc-370Vdc FrequencyRange 47Hz~63Hz Power Factor (typical) 0.99/100Vac    0.98/230Vac  full load Efficiency ( Typical) @ 230Vac 94.4% ≥84% 94.5% ≥88% AC Current (max.) <11 A/100Vac       <5.0A/230Vac <10 A/100Vac       <5.0A/230Vac Inrush Current (Typical) ＜30A/100Vac     ＜60A/230Vac  Cold start Leakage Current ≤1.18mA/2.82mA TN- TT-mains/IT-mains (264Vac input, 50Hz) PROTECTION Over Load 110%~150% of rated current, Constant current limiting for some time(150% of rated current, last 3S) then PS stop working for 7S,after 7S,if the load <=rated current, PS will work normally, auto recovery Over voltage 29~33V, hiccup mode, Auto recovery 56~63V, hiccup mode, Auto recovery Over temperature 115±5℃, detect on temperature controller; shut down O/P, auto recovery after temperature goes down. Short Circuit Long-term mode, auto recovery ENVIRONMENT Operating amb. Temp. & Hum. -25℃~70℃; 20%~90%RH No condensing Storage Temp. & Hum. -40℃~85℃; 5%~95%RH No condensing SAFETY &EMC Note 3 Safety Standards meet UL508, UL60950, EN60950 Withstand Voltage Primary-Secondary: 3.0KVac/20mA .Primary-PG: 2.5KVac/20mA. Secondary-PG: 0.5KVac/40mA. Output-DC OK: 0.5KVac/1mA Isolation Resistance 10Mohms EMC Emission Compliance to EN55022, EN55024, FCC PART 15  CLASS A Harmonic Current Compliance to EN61000-3-2, CLASS A EMC Immunity Compliance to EN61000-4-2,3,4,5,6,11; heavy industry level OTHERS MTBF (MIL-HDBK-217F) More than 300,000Hrs (25℃, Full load) MIL-217 Method 2 Components Stress Method Dimension (L*W*H) 140*124.6*138.2mm Packing 6pcs/CTN, 15Kgs/CTN, 0.04cbm Cooling method Cooling by free air convection Additional function Power boost 150% of rated current Parallel function support DC-OK V On: when output voltage is up to 90% of rated output voltage V Off: when output voltage is down to 85% of rated output voltage DC-OK relay contact rating Max 30V/1Aor 60V/0.3Aor 30Vac/0.3AResistive load DC OK LED Green Over load LED Red, when output voltage goes down to 85% of rated voltage, overload LED flicker When output voltage goes up to 90% of rated voltage, overload LED goes out Shut down signal Remote shut down output voltage Remote control output voltage Remote control/adjust output voltage NOTE 1. All parameters NOT specially mentioned are measured at rated input, rated load and25℃of ambient temperature. 2. Measured at 20MHz of bandwidth by using a12”twisted pair-wire terminated with a 0.1 uF & 10uF parallel capacitor. 3.The power supply is considered as a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies” on https://www.powerld.com. DIN rail power supply is a kind of switching power supply, which can convert unstable input voltage into stable output voltage. We can meet all industry standards of DIN rail power supply. Learn more, follow us, and leave us a message.

Ø  High AC input (180-264Vac) Ø  High Efficiency up to 86% Ø  Output protections: SCP/OLP/OPP Ø  Wide operating ambient temperature (-40℃~65℃) Ø  Operating altitude up to5000m Ø  All using105℃long life electrolytic capacitors. Ø  Can work @-40℃, 220Vac input, full load Ø  100% full load burn-in test Ø  1 year warranty MODEL VAT-A200L-5-D OUTPUT DC Output 5V Rated Current 40A CurrentRange    Note 1 0~40A Peak load 44A (last 100mS, 220Vac input) Ripple and Noise  Note 2 25~65℃ ≤150mV 0~25℃ ≤200mV Voltage ADJ. Range 3.3~5.0V Voltage Accuracy ±2.0% Line Regulation ±0.5% Load Regulation ±2.0% Set-up Time ≤2S (220Vac input, full load) Hold up Time ≥10mS (220Vac input, full load) Temperature Coefficient ±0.03%/℃ Overshoot <5.0% INPUT VoltageRange   180Vac~264Vac FrequencyRange 47Hz~63Hz Efficiency ( Typical) ≥86%(220Vac input, 80% load) AC Current (max.) <3A Inrush Current (Typical) <50A@220Vac     Cold start Leakage Current Input—output:<0.25mA    Input—PG:<3.5 mA (264Vac input, 63Hz) PROTECTION Over Power 210~300W, hiccup mode, auto recovery Over Current 42~60A, hiccup mode, auto recovery Shorted Circuit Long-term mode, auto recovery ENVIRONMENT Operating amb. Temp. & Hum. -40℃~65℃; 20%~90%RH No condensing (pls refer to derating curve) Storage Temp. & Hum. -40℃~85℃; 10%~95%RH No condensing SAFETY &EMC Note 3 Safety Standards GB4943/ EN60950 Withstand Voltage Primary-Secondary: 3.0KVac/10mA .Primary-PG:1.5KVac/10mA. Secondary-PG: 0.5KVDC/10mA. Isolation Resistance 10Mohms EMSImmunity Compliance to EN61000-4-2,3,4,5,6,8,11 OTHERS MTBF (MIL-HDBK-217F) More than 100,000Hrs (25℃, Full load) Dimension (L*W*H) 190×84×30mm Packing 24pcs/CTN Cooling method Free air convection NOTE 1.    All parameters NOT specially mentioned are measured at rated input, rated load and 25℃of ambient temperature. 2.    Measured at 20MHz of bandwidth by using a 12” twisted pair-wire terminated with a 0.1 uF & 10uF parallel capacitor. 3. The SPS is considered a component which will be installed into final equipment. The equipment must be re-confirmed that it still meets EMC directives. We provide high-quality LED power supplies for indoor and outdoor, and a variety of specifications and models of LED power supplies are optional, suitable for specific lighting applications in multiple fields.

Main Specifications Model Output Voltage Range（V） Output Current Range（A） Ripple(p-p) （Rated Load, Width Limited20MHz） EPS4860-1U 53.5±0.25V 0—60 200mV Environmental Conditions No. Items Technical Specifications Unit Remarks 1 Operating Temperature -20—+55 ℃ Full load 2 Storage Temperature -40—+70 ℃ 3 Relative Humidity 5—95 % No condensation 4 Altitude 0-5000 m derate1℃with every 200 meters’ rising at 2000-5000m 5 Cooling Forced cooling,Draw air from the front and exhausts heat from the behind and this module has temperature-sensing timing function. Electrical Characteristics No. Item Technical Requirement Unit Remark 1、Input Characteristics 1.1 Rated input voltage 200—240 Vac Max AC input voltage 310VAC(static state),no damage to the unit for long time AC Input voltage range 90—286 1.2 Frequency 45—65(typical 50/60) Hz 1.3 Power factor ≥0.99 Rated input, rated load 1.4 Power transformation point 160-175 Vac The details refer to power transform characteristic curve diagram 1.5 Max input current ≤30 A Low voltage full load 1.6 Inrush current ≤30 A 220Vac 2、Output Characteristics 2.1 Rated output voltage 53.5±0.25 Vdc Input220Vac 2.2 Output power 3210 W 175—286Vac input 1605 W 90—174Vac input 2.3 Efficiency ≥90 % 220Vac/rated load current 2.4 Temperature coefficient ≤±0.02 %/℃ 2.5 Ripple and noise ≤200 mVp-p Oscillograph band width is 20MHz.Parallel 10u+104 Capacitor with probe 2.6 Starting up output delay ≤8 S 0VDCfrom rated input voltage to42VDC 2.7 Turn on/off overshoot amplitude ≤±5 % 2.8 Dynamic response Overshoot range △V：≤±5 % Load change at 25%—50%—25% or 50%—75%—50%, jumping rate is0.1A/us; and the jumping period is 4ms; the two half periods are the same Recovery time  △t:≤200 µS 2.9 Combined regulation ≤±1% 2.10 Current sharing imbalance ≤±5 % At the range of 50～100％load 2.11 The output rise time 500 ms Rated input, rated load 3、Protection Characteristics 3.1 Input under voltage protection point ≤85 Vac Can auto recover, 3.2 Input under voltage recovery point ≤88 Vac The return difference≥5V 3.3 Input over voltage protection ≥312 Vac Can auto recover Output Current0A（Test by AC SOURCE+ booster） 3.4 Input over voltage recovery point ≥302 Vac The return difference≥5V 3.5 Input over current protection              － － The AC input L and N wire have fuse 3.6 Output over voltage protection point 58.5—60.5 Vdc Constant voltage 3.7 Output current limit protection point          63≤I≤75 A Can auto recover 3.8 Short circuit protection Endure long time short circuit without damage and auto recover. The module will hiccup 5 minutes before it locked itself. 3.9 Over temperature protection Auto-recoverable when temperature is less than65℃ Powerld enterprises is specialized in switching power supply since 1991, obtained ISO9001 certificate in 2002, ISO14001 certificate in 2006.As a professional switching power supply manufacturer,Powerld can supply a broad range of power supply,we can not only supply our customers with high quality products,but also our best service and fast delivery time.

Ø  High Efficiency, and High reliability Ø  Output protections: SCP/OVP/OPP/OLP Ø  Wide operating ambient temperature (-10℃~50℃) Ø  All using 105℃ long life electrolytic capacitors. Ø  100% full load burn-in test Ø  2 years warranty      Ø  Isolated Dual Outputs SPECIFICATION MODEL CMG-H150D12G+24 CMG-H150D24G+12 OUTPUT DC Output V1 12.0V 24.0V V2 24.0V 12.0V Rated Current V1 5A 6A       Note 2 V2 6A      Note 1 5A CurrentRange Note 3 V1 0.5~5.0A 0~6.0A V2 0.6~6.0A 0~5.0A Ripple and NoiseNote4 0~65℃ V1 120mV 240mV V2 240mV 120mV Ripple and Noise -25~0℃ V1 240mV 480mV V2 480mV 240mV Voltage ADJ. Range 11.4V~12.6V 22.8V~25.0V Voltage Accuracy V1 ±1.0% ±1.0% V2 ±10.0% ±10.0% Line Regulation V1 ±0.5% V2 ±1.0% Load Regulation V1 ±3.0% V2 ±10.0% Set-up Time ＜1.0S (230Vac input, Full load) Hold up Time ＞20mS(230Vac input, Full load) Temperature Coefficient ±0.03%/℃ Overshoot and Undershoot <5.0% INPUT VoltageRange   176Vac~264Vac FrequencyRange 47Hz--63Hz Efficiency ( Typical) 80% 80% AC Current (max.) 2.0A/176VAC Inrush Current (Typical) 50A@220Vac     Cold start Leakage Current Input—output:<0.25mA    Input—PG:<3.5mA PROTECTION Over Power 105%~150% of rated output current, auto recovery Over Current V1 110%~220%    Auto recovery 110%~150%    Auto recovery Over Voltage V1: 110%~150% of rated output voltage, auto recovery Shorted Circuit Long-term mode, auto recovery ENVIRONMENT Operating amb. Temp. & Hum. -10℃~50℃; 20%~90%RH No condensing Storage Temp. & Hum. -30℃~85℃; 10%~95%RH No condensing SAFETY &EMC   (Note 5) Safety Standards GB4943-2001; EN60950-1：2006 Withstand Voltage Primary-Secondary:3.0KVac;≤10mA .Primary-PG:1.5KVac;≤10mA. Secondary-PG:0.5KVDC;≤10mA. Output V1—V2: 0.5KVDC;≤10mA. Test time:1 min Isolation Resistance ≥100M ohms EMI Conduction&Radiation Compliance to EN55022(CISPR22)ClassB Harmonic Current Compliance to EN61000-3-2,17625.1-2003 EMSImmunity Compliance to EN61000-4-2,3,4,5,6,8,11;ENV50204,light industry level,criteriaA OTHERS MTBF (MIL-HDBK-217F) More than 100,000Hrs (25℃, Full load) Dimension (L*W*H) 199×98×40mm Packing 0.75Kg/pcs,20PCS/CTN, 15KGS. Cooling method Cooling by free air convection NOTE 1.    CMG-H150D12G+24 Total output power can’t exceed 150W, Label is marked by the Max current. Recommend the loading is 12V/5A,24V/3.75A.   2.    CMG-H150D24G+12Total output power can’t exceed 150W, Label is marked by the Max current. Recommend the loading is 24V/5A,12V/3.0A.  3.    All parameters NOT specially mentioned are measured at rated input, rated load and 25℃ of ambient temperature. 4.    Measured at 20MHz of bandwidth by using a 12” twisted pair-wire terminated with a 0.1 uF & 47uF parallel capacitor. 5.    The SPS is considered a component which will be installed into final equipment. The equipment must be re-confirmed that it still meets EMC directives. Powerld enterprises is specialized in switching power supply since 1991, obtained ISO9001 certificate in 2002, ISO14001 certificate in 2006.As a professional switching power supply manufacturer,Powerld can supply a broad range of power supply,we can not only supply our customers with high quality products,but also our best service and fast delivery time.

Ø  High Efficiency, and High reliability Ø  Output protections: OCP/OPP/SCP Ø  Wide operating ambient temperature (-10℃~50℃) Ø  All using 105℃ long life electrolytic capacitors. Ø  100% full load burn-in test Ø  1 years warranty SPECIFICATION MODEL GST-H150S8.5-M GST-H150S12-M GST-H150S24-M GST-H150S28-M GST-H150S36-M GST-H150S48-M OUTPUT DC Output 8.5V 12V 24V 28V 36V 48V Rated Current 17.5A 12.5A 6.0A 5.5A 4A 3.0A CurrentRange    0~17.5A 0~12.5A 0~6.0A 0~5.5A 0~4.0A 0~3.0A Ripple and Noise  Note 2 100Mv 120mV 200mV 200mV 200 mV 200mV Voltage ADJ. Range ±5% of rated output voltage Voltage Accuracy ±2.0 Line Regulation ±0.5% Load Regulation ±1.0% Set-up Time <=1.0S (220Vac input, Full load) Hold up Time >=20mS(220Vac input, Full load) Temperature Coefficient ±0.03%/℃ Overshoot and Undershoot <5.0% INPUT VoltageRange  176Vac~265Vac FrequencyRange 47Hz~63Hz Efficiency (Typical) 220Vac 76% 80% 81% 82% 85% 85% AC Current (max.) 4.0A 2.0A 1.9A 2A 2.0A 1.8A 0.50A Inrush Current (Typical) 40A@220Vac  Cold start Leakage Current <3.5mA PROTECTION Over Current 105%~150% of rated output current, auto recovery Over Power 105%~150% of rated output current, auto recovery Shorted Circuit Long-term mode,auto recovery ENVIRONMENT Operating amb. Temp. & Hum. -10℃~50℃; 20%~90%RH No condensing Storage Temp. & Hum. -25℃~85℃; 10%~95%RH No condensing SAFETY &EMC   Safety Standards EN60950-1 Withstand Voltage Primary-Secondary:1.5KVac; Primary-PG:1.5KVac; Secondary-PG:0.5KVDC Isolation Resistance 100M ohms OTHERS MTBF (MIL-HDBK-217F) More than 100,000Hrs (25℃, Full load) Dimension (L*W*H) 199×98×40mm Connection 7P/8.025mm barrier terminal block Cooling method Cooling by free air convection NOTE 1.     All parameters NOT specially mentioned are measured at rated input, rated load and 25℃of ambient temperature. 2.     Measured at 20MHz of bandwidth by using a 12” twisted pair-wire terminated with a 0.1 uF & 47uF parallel capacitor. Powerld enterprises is specialized in switching power supply since 1991, obtained ISO9001 certificate in 2002, ISO14001 certificate in 2006.As a professional switching power supply manufacturer,Powerld can supply a broad range of power supply,we can not only supply our customers with high quality products,but also our best service and fast delivery time.

Ø  Universal input 80~264Vac or 113~370Vdc Ø  84W free air convection, 120W with 10CFM forced air Ø  High Efficiency, long life, high reliability Ø  Output protections: SCP/OVP/OCP/OPP Ø  Wide operating ambient temperature (-30℃~70℃) Ø  Operating altitude up to 4000m Ø  All using 105℃ long life electrolytic capacitors. Ø  100% full load burn-in test Ø  Meet Class I and Class II(no ground required) device Ø  No load power consumption ≤0.35W Ø  Built-in 12V/0.5A auxiliary output Ø  4’’*2’’ Compact size Ø 3 years warranty   MODEL PS-120-24 OUTPUT DC Output 24V Rated Current (free air convection) 3.5A (84W) Rated Current (10CFM forced air) 5A (120W) Ripple and Noise  Note 2 0~70℃ ≤100mV -30℃~0℃ ≤150mV Voltage ADJ. Range 22.8~25.2V Voltage Accuracy ±1.0% Line Regulation ±0.5% Load Regulation ±1.0% Set-up Time ≤0.5S (110/220Vac input, Full load) Hold up Time ≥10Ms @110Vac input ; ≥40Ms @220Vac input  Full load Temperature Coefficient ±0.03%/℃ Overshoot and Undershoot <±5.0% INPUT VoltageRange  Note 3 80Vac~264Vac; 113~370Vdc Rated input voltage range 100~240Vac; 133~308Vdc FrequencyRange 47Hz-63Hz Efficiency ( Typical) 90% AC Current (max.) ≤2.5 A/110VAC  ≤1.5 A/220VAC Inrush Current (Typical) ≤30 A/110VAC  ≤60A/220Vac     Cold start Leakage Current Input to PG: ≤1mA   Input to output: ≤0.5mA (264Vac input, 63Hz) PROTECTION Over Current 5.75~7.5A, hiccup mode, auto recovery Over Power 138~180W, hiccup mode, auto recovery Over Voltage 26.4~31.2V, Constant voltage, auto recovery Shorted Circuit Long-term mode, auto recovery Function Fan Supply 12V @ 0.5A for driving a fan; tolerance ±15% ENVIRONMENT Operating amb. Temp. & Hum. -30℃~70℃; 20%~90%RH No condensing (refer to the derating curve) Storage Temp. & Hum. -40℃~85℃; 10%~95%RH No condensing SAFETY &EMC   (Note 3) Safety Standards Meet UL62368, EN62368 Withstand Voltage Primary-Secondary:4KVac/5mA; Primary to PG: 2KVac/5mA; Secondary-PG: 1.5Vac/5mA Isolation Resistance ≥100M ohms EMI Conduction&Radiation Compliance to EN55032 Class B Harmonic Current Compliance to EN61000-3-2, Class A EMSImmunity Compliance to EN61000-4-2,3,4,5,6,8,11; heavy industry level OTHERS MTBF (MIL-HDBK-217F) More than 200,000Hrs (25℃, Full load) Dimension (L*W*H) 101.6×50.8×29mm (4’’*2’’*1.14’’) Packing 45PCS/CTN, 15.2KGS, 0.023CBM Cooling method 84W free air convection; 120W with 10CFM forced air NOTE 1.All parameters NOT specially mentioned are measured at rated input, rated load and 25℃ of ambient temperature. 2.Measured at 20MHz of bandwidth by using a12”twisted pair-wire terminated with a 0.1 uF & 10uF parallel capacitor. 3. The power supply is considered as a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies” on https://www.powerld.com Focus on the development of Industrial power supply for many years,make efforts to meet customers' requirements and search for long-term cooperation.24 hours online service affiliates you to contact us.

Ⅰ. General ● Input range 90-286Vac ● Have PFCfunction,PF≥0.99 ● It features input over/under voltage protection, output over current protection, output overvoltage protection, output short circuit protection ● Wideoperating temperature range(-30℃~55℃) ● System withbattery management,power systemmonitoring,configure thesensor canachieve environmentalmonitoring, can provideRS485 (optional)communicationscan take the initiativeto reportalarms,easy to implementremote monitoringand unattended High efficiency, longlife and highreliability IV. Environmental Conditions No. Items Technical Specifications Unit %

Ø  Universal AC input Ø  Built-in active PFC,PF>0.95 Ø  High efficiency, long life and high reliability Ø  Output protection: SCP/OLP/OVP/OPP Ø  Wide operating ambient temperature (-20~65℃) Ø  All using105℃long life electrolytic capacitor Ø  100% full load burn-in test Ø  3 years warranty MODEL VAT-UP200U-5 OUTPUT DC Output 5.0V Rated Current 40A CurrentRange    Note 1 0~40A Peak load 45A (50mS, 220Vac input) Ripple and Noise  Note 2 0~65℃ ≤250mV -20℃ ≤300mV Voltage ADJ. Range / Voltage Accuracy ±4.0% Line Regulation ±0.5% Load Regulation ±2.0% Set-up Time ≤2S (220VAC input, 40A) Hold up Time ≥5mS (220Vac input, 32A) Temperature Coefficient ±0.03%/℃ Overshoot and Undershoot <5.0% INPUT VoltageRange   90Vac~264Vac FrequencyRange 47Hz--63Hz Power Factor(Typical) PF＞0.95/230VAC   full load Efficiency ( Typical) ≥89%（220VAC, 40A）    ≥87%（110VAC, 30A） AC Current (max.) <2A Inrush Current (Typical) <60A@230Vac Cold start Leakage Current Input—output:<0.25mA    Input—PG:<3.5Ma (264Vac, 63Hz) PROTECTION Over Load 44~65A, Hiccup mode, auto recovery Over power 220~320W, hiccup mode, auto recovery Short Circuit Long-term mode, auto recovery ENVIRONMENT Operating amb. Temp. & Hum. -20℃~65℃; 20%~90%RH No condensing (refer to the derating curve) Storage Temp. & Hum. -40℃~85℃; 10%~95%RH No condensing Vibration 10 ~ 500Hz,2G10min./1cycle, period for 60min. each along X,Y, Z axes Withstand Voltage Primary-Secondary: 3.0KVac; ≤10mA .Primary-PG: 1.5KVac; ≤10mA. Secondary-PG: 0.5KVDC; ≤10mA. Isolation Resistance 10Mohms SAFETY&EMC (Note 3) EMI Conduction & Radiation Compliance to EN55022, EN55024, FCC PART 15  CLASS B Harmonic Current Compliance to EN61000-3-2, Class D EMSImmunity Compliance to EN61000-4-2,3,4,5,6,8,11; heavy industry level OTHERS MTBF (MIL-HDBK-217F) More than 100,000Hrs (25℃, Full load) Dimension (L*W*H) 210×31.5×30mm Packing 49PCS/CTN, 15KGS, 0.04CBM Cooling method Cooling by air NOTE 1. All parameters NOT specially mentioned are measured at rated input, rated load and25℃of ambient temperature. 2. Measured at 20MHz of bandwidth by using a12”twisted pair-wire terminated with a 0.1 uF & 47uF parallel capacitor. 3.The power supply is considered as a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies” onhttp://www.powerld.com.cn.