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Shanghai Shanjie Electric S&T Co.,Ltd
Shanghai Shanjie Electric S&T Co.,Ltd
Chinese version
Single-phase Variable-frequency power supply
3-Phase Variable-frequency power supply
Frequency stability Power Supply
400Hz Military Variable-frequency power supply

Variable-frequency power supply Variable-frequency power supply
DD-500VA DD-2KVA

Variable-frequency power supply

DD-5KVA

 
 Introduction

  The ideal AC power source features stabilized frequency, stabilized voltage, zero internal resistance and pure sine wave voltage waveform (no distortion). Variable frequency power source is very close to ideal AC power source. Therefore, the developed countries tend to use the variable frequency power source as the standard power source, so as to provide the electric devices the most excellent power-supplying environment, which is convenient to objectively test technical performance of the electric devices. The variable frequency power source mainly consists of two types: Linear Amplifying and SPWM Switching.

Notes
  1) Custom-made specifications are available
  2) The website specifications are only for your reference, the actual specificities depends on attached specifications.


 Technical Index

Model/Output Capacity

DD-0.5VA

DD-1kVA

DD-2kVA

DD-3kVA

DD-4kVA

DD-5kVA

DD-6KVA

DD-10KVA

DD-15KVA

SD-20KVA

SD-30KVA

SD-45KVA

SD-60KVA

Output Current

LOW

4.2A

8.4A

16.8A

25A

33.4

42A

50A

84A

125A

168A

250A

375A

500A

HIGH

2.1A

4.2A

8 .4A

12.5A

16.7

21A

25A

42A

63A

84A

125A

188A

250A

Output Voltage

 Single-phase LOW: 0-250V     HIGH: 0-500V

Output Frequency

 45.0-70.0 Hz Adjustable,50Hz , 60Hz , 2F , 4F , 400Hz (Optional)

Circuit Type

 (IGBT)MPWM (Pulse Width Modulation)

Input Voltage

 DD:Single-phase AC220V ± 15%   50/60Hz     SD:Three-phase four-wire AC380V ± 15%    50/60Hz

Frequency Stability

 ≤ 0.05%

Load Regulation

 ≤ 0.5%-1.5% (Resistor Load)

Waveform Distortion Rate

 ≤ 0.5%-1.5% (Resistor Load)

Efficiency
85%

Output Instruments

Frequency Indicator, 4-digits RMS digital frequency indicator, resolution 0.1Hz

Voltage Meter, 4-digits RMS digital voltage meter, resolution 0.1V

Ampere Meter, 4-digist RMS digital ampere meter, resolution 1mA

Power Indicator, 4-digits RMS digital power indicator, resolution 1W

Power Factor Meter Resolution 0.001

 

Protective Devices

Over load, short circuit, over voltage, over current, over temperature protective and alarm devices.

Operating Environment

 Temperature 0~40℃ Relative Humidity 0~90%


Method for Selecting Power Capacity

1. Resistance: Power Capacity = 1.1× Load Power


                  Load Starting Current
2. Induction: Power Capacity = ──────────────────── × Load Power
                  Load Rated Current

 

?????????????????????? ????           Wave Crest Coefficient for Load Current
3. Rectification: Power Capacity = ──────────────────────────────── × Load Power
                            1.5


4. Mixed: Please properly select according to the percentage of different loads.

 

Note: For such inductive loads as refrigerator and air conditioning, the power capacity should be selected according to the starting power.
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