Shanghai Dafan specializes in the production of DFVF3000 frequency series resonance withstand voltage test device, is the latest generation of special for capacitive test specimen AC withstand voltage test equipment. The product technology is advanced, simple operation, reliable quality, small volume, light weight, very convenient for on-site use, has been highly evaluated by the majority of users.
The equipment is mainly used in the following aspects:
1, 6kV-500kV high voltage crosslinked cable AC withstand voltage test
2, generator AC withstand voltage test
3, GIS and SF6 switch AC withstand voltage test
4, 6kV-500kV transformer frequency withstand voltage test
5, other electric power high-voltage equipment such as bus bar
5, the power of the high voltage equipment. The AC withstand voltage test of other electric power high-voltage equipments such as busbar, bushing and transformer.
The complete set of equipment consists of frequency conversion power supply, excitation transformer, reactor and voltage divider.
Design principle
Using the principle of series resonance, using the excitation transformer to stimulate the series resonance circuit, adjusting the output frequency of the frequency converter controller, so that the circuit inductance L and the test piece C series resonance, resonance voltage that is added to the test piece on the voltage.
Common models and typical configuration table
Model interpretation: DFVF3000-44/22 indicates that the capacity of 44KVA, the voltage of 22KV
(Note: The following is only a list of some of the commonly used models, can be customized according to the requirements)
A. Cable AC voltage withstand test series Models Test items that can be met Equipment reactor configuration Remarks BPL - 100/50 10kV(300mm) cable 1KM 22kV Ⅹ 1 portable BPL - 160/40 1、10kV(300mm)cable 3KM
2、35kV(300mm)cable 1KM 22kV Ⅹ 3 portable BPL - 216/54 1、10kV(300mm)cable 5KM
2. 35kV (300mm) cable 2KM3. 35kV transformer, switch,
4. 10kV motor, transformer
5. Generator up to 600MW, etc. 22kV Ⅹ 6 sets Portable BPL - 324/32 110kV (300mm) cable 3KM 130kV Ⅹ 2 sets Non-portable Generator frequency withstand voltage test series Model No. Test items that can be satisfied Equipment reactor configuration Remarks BPL - 100/50 1, 100MW and below generator Phase capacitance 0.1-0.3uF
2, 10kV (300mm) cable 1KM 22kV Ⅹ 1 portable BPL - 160/40 1, 600MW and below generator Phase capacitance 0.1-0.3uF
2, 10kV (300mm) cable 1KM 22kV Ⅹ 1 portable BPL - 160/40 1, 600MW and below generator Phase capacitance 0.1-0.5uF Capacitance 0.1-0.25uF for generator phase up to 600MW
2. 10kV(300mm) cable 1.5KM 18kV Ⅹ 2 sets Portable BPL - 216/54 1. Generator phase capacitance 0.1-0.3uF for generator phase up to 600MW
2. 10kV(300mm) cable 3KM 3. Portable GIS and SF6 switch AC withstand voltage test series Model No. Test items can be satisfied Reactor configuration Remarks BPL-100/50 1、110kV GIS AC withstand voltage test
2、35kV（300mm）cable 1KM
3、10kV（300mm）cable 3KM
4、220kV transformer frequency withstand voltage 5、10kV（300mm）cable 3KM
4、220kV transformer frequency withstand voltage Frequency AC withstand voltage of transformer below 220kV 5. 110kV transformer AC withstand voltage 40kV Ⅹ 5 sets of portable BPL - 216/54 1. 110kV GIS AC withstand voltage test 2. 110kV transformer AC withstand voltage 50kV Ⅹ 4 sets of portable BPL - 100/50 3. 10kV (300mm) cable 3KM
4. 220kV withstand voltage of transformer 5. 110kV transformer AC withstand voltage 40kV Ⅹ 5 sets of portable BPL - 216/54 1. 110kV GIS AC withstand voltage test 2. 110kV transformer AC withstand voltage 50kV Ⅹ 4 sets of portable 4. 100/50 3、10kV（300mm）cable 3KM
4、Transformer frequency withstand voltage below 220kV
5、110kV transformer AC withstand voltage 28kV Ⅹ 3 sets of portable BPL - 216/54 1、Ac withstand voltage test of 110kV GIS 2、35kV（300mm）cable 1KM
3、10kV（300mm）cable 1KM
4、220kV transformer frequency withstand voltage
5、110kV transformer AC withstand voltage 40kV Ⅹ 2 sets of portable （Note:：The above only lists some of the commonly used models, can be customized according to the requirements）
Technical characteristics
* One of the few in China who have passed the national authority --- Power Industry Electrical Equipment Quality Inspection and Testing. Power Industry Electrical Equipment Quality Inspection and Testing Center (Wuhan High Voltage Research Institute) strict type test identification, reliable quality, to ensure the safety of the test personnel, test products and test equipment itself;
* In the Northeast Electric Power Academy of Science organized by the 2008 National Equipment Competition in a one-time through all the testing projects, the only one to achieve the requirements of the national standards, including the 60 Min temperature rise, the competition results again ranked first!
*In the 2008 National Equipment Competition organized by the Northeast Power Science Institute, the only one to meet the requirements of the national standard, including 60Min temperature rise!
* Small size, light weight, especially suitable for field use;
* Comply with the national standard requirements: monitoring peak / √2 function, real-time monitoring of the test waveform;
* over-voltage, over-current, discharge, overheating, and zero-start protection is comprehensive and reliable, with an action time of 1 microsecond;
* The device is equipped with a micro-printer, which can be printed in a timely manner to save the test data;
* The device is equipped with a micro-printer, which can be printed in a timely manner to save the test data;
* The test data can be saved in a timely manner.
* According to the military standard anti-vibration and dust-proof design, resistance to long-distance transportation and harsh use of the environment;
* One-button mouse-type knob "foolproof" operation, the large screen LCD display;
* Unique software calibration function, convenient for the user to calibrate the meter, to ensure the accuracy of the high voltage value;
* Germany Rittal design all-aluminum alloy chassis, vertical and horizontal dual-use, lightweight and beautiful, greatly facilitating the use of the site;
* All major components are imported by the world's leading companies, including the United States, Texas Instruments, Intel, Germany, Siemens, Schneider, Toshiba, Japan, Fuji, etc.;
* stable and reliable products, three years of warranty;
* Keeping promises, professional and timely service. Professional and timely, and do our best to serve the needs of customers;
* Many well-known enterprises to choose, a large number of applications in many national key projects, the use of the site throughout the country, and obtain the user's consistent high praise.
Components
Consisting of frequency conversion power supply, excitation transformer, high-voltage reactor and capacitor voltage divider.
DF9000 type inverter grounding characteristic measurement system
Product Overview:
DF9000 type inverter grounding characteristic measurement system is a new type of high-quality test system jointly developed by our company and Shanghai Jiaotong University with independent intellectual property rights, which adopts the most advanced digital frequency selective measurement (electronic impedance) technology; adopts pure sine wave and high power signal source as the test power supply. The system adopts the most advanced digital frequency selection measurement (electronic countermeasure) technology; adopts pure sine wave signal source as the test power supply, multi-frequency point data acquisition, overcoming the limitations of two-point heterodyne interpolation; especially suitable for large, ultra-large grounding network grounding impedance and other characteristics of the measurement of parameters. The system is powerful, superior performance, easy to use, in the domestic leading level, is the ideal choice to replace imported products.
Main Functions:
1. Accurately measure large grounding network grounding impedance, grounding resistance, grounding reactance;
2. Accurately measure large grounding network field surface potential gradient;
4. Accurately measure the transfer potential of large grounding network;
5. Measurement of grounding lead wire conduction resistance;
6. Measurement of soil Resistivity
Main features:
Selected frequency characteristics of sharp, passband ± 0.3Hz. 200V interference measured in ± 1Hz frequency measurement error caused by less than 0.1mV, interference suppression capability of more than one in 10,000, far better than some of the imported instruments a few percent of the anti-jamming ability, to ensure that the test precision. The system is also designed with a 50Hz trap, which can completely filter out 50Hz industrial frequency interference.
☆System output power (2-20KW), high voltage (0-1000V), output current (0-50A)
The system has completely solved the problem of small output power and voltage of similar equipment, which makes it difficult to raise the current on site. Most of the ground network measurement equipment power is small, such as the more common equipment output 100V/5A (500W), 150V/10A (1500W). Due to the small output power and output voltage, it is difficult to generate enough current on site, and the actual test current is far from reaching the nominal test current of the equipment (e.g., 5A), and in many cases, the measured signal becomes very small and difficult to measure accurately. The high power (5-20KW) signal source of this system can ensure the generation of sufficiently large circuit current, improve the signal-to-noise ratio, and accurately measure the contact voltage, step voltage and other tiny quantities.
☆☆Point by point stepping accurate frequency selection test, non-error large double-point frequency conversion.
This system adopts 40-70Hz step by step 1Hz multi-point frequency conversion test, overcoming the limitations of the two-point frequency conversion method, so as to obtain the frequency characteristics of the grounding system. Can clearly find and eliminate the measurement of bad value due to the same frequency harmonic interference, the measurement results are more in line with the actual value. Part of the instrument by technical limitations, the use of low-precision simple LC filter circuit with simple software processing, select and industrial frequency deviation far from the dual-point frequency conversion (such as 40/60Hz), its anti-interference effect, measurement accuracy and data repeatability to be verified, and may be subject to the influence of a specific frequency interference signal. Dual-point frequency conversion measurement is not an ideal method for ground network anti-interference measurement.
☆☆Accurately measure ground impedance, step potential difference, contact potential difference, soil resistivity, ground surface potential distribution, ground network current distribution and other parameters.
☆Measuring the voltage and current at the specified frequency and the phase difference between the voltage and current at the same time, it automatically calculates the grounding impedance and its resistive and reactive components.
☆☆Independent high-precision frequency-selective voltmeter, built-in human body analog resistance, can be convenient to measure the step voltage, contact voltage.
☆Each range can be calibrated separately to ensure accuracy.
☆☆Can be connected to Rogowski coil (Roche coil, flexible current transformer), convenient to measure the current without disconnecting the conductor on site. And it can automatically recognize multiple coils with different ranges.
☆☆Large screen display test data, a key mouse type knob, foolproof operation.
With SD data storage card, you can easily download the data.
☆Built-in rechargeable battery, can work continuously for more than 8 hours
Technical Parameters:
Power Supply Voltage: AC220V or 380V, 50Hz
Output Power: 10KW (2KW～20KW optional, can be customized)
Output Voltage: 0～1000V (customized)
Test Output Current: 0～50A, can be customized. Test Output Current: 0～50A
Frequency Adjustment Range: 45～65Hz
Step Frequency: 1Hz
Anti-Interference Capability: Pass Band ±0.3Hz, Attenuation >80dB/Hz
Measurement Range: 0.001～1000Ω
Definition Rate: 1mΩ
Measurement Accuracy: 1.0 level
Use of ambient temperature: -20 ℃ ~ +50 ℃
DF-910K inverter high current multifunctional grounding impedance measurement system
Product Overview:
DF-910K inverter high current multifunctional grounding impedance measurement system, is Shanghai Dafan Electric Co. The system consists of: DF910K inverter grounding impedance measuring instrument, isolation transformer, and conduction measuring instrument and other accessories. Main functions: accurate measurement of grounding impedance, grounding resistance, grounding reactance, on-resistance and soil resistivity.
The system adopts the most advanced digital filtering frequency selection measurement technology, the output power of up to 10KW, dual-point or multi-frequency points to collect data, especially suitable for grounding impedance measurement of the ground network. The system measurement data is accurate and stable, strong anti-interference ability, good data repeatability, in the domestic leading level.
Main Functions:
1. Accurate measurement of large grounding network grounding impedance, grounding resistance, grounding reactance;
2. Accurate measurement of large grounding network field surface potential gradient;
4. Accurate measurement of large grounding network transfer potential;
5. Measurement of grounding lead wire on resistance;
6. Measurement of soil Resistivity
Technical features:
Selective frequency characteristics of the sharp, passband ± 0.5Hz. 200V measured interference in ± 1Hz under the measurement caused by the error is less than 0.1mV, interference suppression capability of more than one millionth of a percent, far better than some imported instruments a few percent of the anti-jamming ability, to ensure the accuracy of the measurements, the measurement of data can be repeated.
☆System output power 10KW, voltage 0-1000V, current 0-20A, for the measurement of various sizes of ground network can ensure that the site can generate enough test current.
We know that loop current is equal to voltage divided by resistance. In order to generate enough current, the device must be able to provide high enough voltage and power. If the rated output of the device is 5A, 100V, total power 500W, in most of the field measurement is far from 5A current value, and sometimes can only produce hundreds of milliamps of current. For large-scale ground network under the environment of strong interference, such a small test current can not guarantee the accuracy of the measurement. The high output voltage (1000V) and high power (10KW) of this device can ensure that enough current is generated on site to ensure the accuracy and repeatability of the measurement results.
☆☆Multi-function, can measure grounding impedance, grounding resistance, reactance, soil resistivity.
☆The ranges can be calibrated separately to ensure the accuracy.
☆Large screen display test data, foolproof operation.
System parameters:
Power supply voltage: AC220V or 380V, 50Hz
Output power: standard 10KW (5KW-20KW optional)
Output voltage: standard 0 ~ 400 ~ 800V (0 ~ 1000V optional)
Test output current: standard 0 ~ 25A (0 ~ 60A optional)
Test output current: standard 0 ~ 25A (0 ~ 60A optional)
Test output current: standard 0 ~ 25A (0 ~ 60A optional) 60A optional)
Frequency adjustment range: 45 ~ 65Hz multi-frequency optional
Interference immunity: passband ± 0.3Hz, attenuation > 80dB/Hz;
Measuring range: 0.001 ~ 1000Ω
Definition: 1mΩ
Measuring accuracy: 1.0 level
Testing output current: standard 0 ~ 25A (0 ~ 60A optional)
Testing output current: standard 0 ~ 25A (0 ~ 1000V optional)
Testing output current: standard 0 ~ 400 ~ 800V (0 ~ 1000V optional)
DF-902K inverter anti-interference ground network grounding impedance measuring instrument
Product Overview:
DF-902K inverter anti-interference ground network grounding impedance measuring instrument, is Shanghai Dafan Electrical Co. The main function of the system: accurate measurement of grounding impedance, grounding resistance, grounding reactance, soil resistivity.
The equipment adopts the most advanced digital filtering frequency measurement technology, has the super anti-interference ability, completely eliminated by the industrial frequency induction, zero sequence current, harmonic and spurious signal interference to the measurement of the error brought about by; Output pure sinusoidal high-power signal as the test power supply, the output power up to 2KW, dual-point or multi-frequency point data acquisition, especially suitable for the grounding impedance of grounding network measurement. The system has accurate and stable measurement data, strong anti-interference ability, good data repeatability, and is at the domestic leading level.
Main functions:
1. Accurate measurement of large grounding network grounding impedance, grounding resistance, grounding reactance;
2. Accurate measurement of large grounding network field surface potential gradient;
3. Accurate measurement of large grounding network contact potential difference, contact voltage, cross-step potential difference, step voltage;
4. Accurate measurement of large grounding network Transfer potential;
5. Measurement of grounding lead wire on-resistance;
6. Measurement of soil resistivity
Technical features:
☆Adopting the military electronic countermeasures digital filtering technology, anti-interference ability is extremely strong. (Key performance)
Selected frequency characteristics of sharp, passband ± 0.5Hz. measured 200V interference in ± 1Hz measurement error caused by less than 0.1mV, interference suppression capability of more than one millionth of a million, far better than some of the imported instruments a few percent of the interference resistance to ensure the accuracy of the measurement, the measurement of data can be repeated.
☆☆Multi-point accurate frequency selection test
Because of the digital filtering technology with strong anti-interference ability, the equipment can be used with the industrial frequency is very close to the multi-point frequency measurement, such as (47,49,51,53Hz, etc.). If the use of two-point frequency (such as 40/60Hz, 30Hz, 120Hz, etc.) with a farther deviation from the industrial frequency, the test results and industrial frequency test results of the equivalence of the study is needed.
☆☆Multi-function, can measure ground impedance, ground resistance, reactance, soil resistivity.
☆System output power 2KW, voltage 0-400V, current 0-5A, for general small and medium-sized ground network can ensure that the site can generate enough test current.
☆System automatically converts the range. Adopting advanced gain programming amplification technology, it ensures the measurement accuracy in the high and low range, without the need to manually shift gears, which is simple and convenient.
☆The ranges can be calibrated separately to ensure accuracy.
☆☆Highly stable inverter source, pure sine wave output, ensuring the equivalence of test results, and over-voltage, over-current and overheating protection.
☆☆Large screen display test data, foolproof operation.
☆☆Can save more than 2000 groups of data, and upload the data online with computer, convenient for analysis and processing.
Technical Parameters:
Power Supply Voltage: AC220V
Output Power: 2KW
Output Voltage: 0～200V～400V
Test Output Current: Maximum 10A (200V) or 5A (400V)
Measuring Frequency: 45～65Hz Multi-point Frequency Selectable
Interference immunity: passband ± 0.5Hz, attenuation >80dB/Hz; waveform distortion rate: ≤ 1%
Measuring range: 0.001 ~ 1000Ω
Definition: 1mΩ
Measuring accuracy: 1.0 level
Use of ambient temperature: -20 ℃ ~ +50 ℃
Equipment weight : 29Kg