| After-sales Service: | Online |
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| Warranty: | 1 Year |
| Type: | Withstand Voltage Tester |
| Control: | Computer Control |
| Weight: | 0-100Kg |
| Power Source: | AC220V |
| Customization: |
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Audited Supplier Frequency conversion series resonance withstand voltage test device/Tester
The main application scope of the device
1, meet 300mm2,10kV cable AC voltage withstand test, length 10km, capacitance ≤3.7uF, test frequency 30~300Hz, test voltage U≤22kV.
2, meet 300mm2,35kV cable AC voltage withstand test, length 5km, capacitance ≤0.95uF, test frequency 30~300Hz, test voltage U≤52kV. 3, meet 630mm2,110kV cable AC voltage withstand test, length 1km, capacitance ≤0.188uF, test frequency 30~300Hz, test voltage U≤128kV.
4, meet 200MW/13.8kV generator AC voltage withstand test, capacitance ≤0.2uF, test frequency 45~65Hz, test voltage U≤20.7kV.
5, meet the 10kV motor AC voltage test, test frequency 30~300Hz, test voltage U≤16kV.
6, meet 100MVA/110kV transformer AC withstand voltage test, capacitance ≤0.02uF, test frequency 45~65Hz, test voltage U≤160kV. 7, meet 110kV bus, GIS AC voltage test, test frequency 30~300Hz, test voltage U≤265kV.
Frequency conversion series resonance withstand voltage test device/Tester
System specifications and performance
System technical parameter
Rated output voltage: 0 ~ 270kV
Resonant voltage wave type: sine wave, waveform distortion < 1.0% Maximum subject current; 3A
Maximum test capacity: 810kVA
Output frequency: 30 ~ 300Hz
Working time: Continuous working time 60min under full power output
Quality factor: 30 ~ 90
Input working power supply: three-phase 380V±10%, 50Hz
Ambient temperature: -15ºC ~ +40ºC
Relative humidity: < 90RH%, no condensation
Altitude: < 3500m
Noise: ≤50dB
Performance characteristics of the system
Making full use of our company's advantages in electronic measurement technology and electromagnetic compatibility, we independently develop, design and produce the components of this set of equipment including: frequency conversion power supply, excitation transformer, cast-type high voltage reactor and high precision capacitance divider.
It has manual/automatic mode, large screen display, test parameter setting, and automatic timing and operation prompt function.
With a number of protection functions, such as: overvoltage, overcurrent protection, discharge protection, mismatch protection.
Device capacity determination
Meet 630mm2,110kV cable AC voltage withstand test, length 1km, capacitance ≤0.188uF, test frequency 30~300Hz, test voltage U≤128kV.
The frequency is set to 37Hz
Test current I=2πfCU test =2π×35×0.188×10-6×128×103=5.3A Corresponding reactor inductance L=1/ω2C=100H
Ten reactors are designed, and five reactors of ten reactors are connected in two groups in parallel, so the parameter of a single reactor is 81kVA/27kV/3A/40H, and the total capacity of the device is 810kVA.
Frequency conversion series resonance withstand voltage test device/Tester
Verification:
1. Meet 100MVA/110kV transformer AC withstand voltage test, capacitance ≤0.02uF, test frequency 45~65Hz, test voltage U≤160kV. Eight reactors are used in series, and the inductance is L=40*8=320H. Test frequency f=1/2π√LC=1/(2×3.14×√320×0.02×10-6)=62.9Hz. Test current I=2πfCU test =2π×62.9×0.02×10-6×160×103=1.3A.
2. Meet 300mm2,10kV cable AC voltage withstand test, length 10km, capacitance ≤3.7uF, test frequency 30~300Hz, test voltage U≤22kV. Six reactors are used in parallel, and the inductance is L=40/6=6.7H. Test frequency f=1/2π√LC=1/(2×3.14×√6.7×3.7×10-6)=32Hz.
Test current I=2πfCU test =2π×32×3.7×10-6×22×103=16.4A.
3. Meet 300mm2,35kV cable AC voltage withstand test, length 5km, capacitance ≤0.95uF, test frequency 30~300Hz, test voltage U≤52kV. Use two reactors in series and four groups in parallel, and the inductance is L=40*2/4=20H.
Test frequency f=1/2π√LC=1/(2×3.14×√20×0.95×10-6)=36.5Hz.
Test current I=2πfCU test =2π×36.5×0.95×10-6×52×103=11.3A.
4. Meet 200MW/13.8kV generator AC voltage withstand test, capacitance ≤0.2uF, test frequency 45~65Hz, test voltage U≤20.7kV. Use the reactor section, the inductance is L=40H,
Test frequency f=1/2π√LC=1/(2×3.14×√40×0.2×10-6)=56.3Hz.
Test current I=2πfCU test =2π×56.3×0.2×10-6×20.6×103=1.5A. Conclusion: The capacity of the device is 810kVA/270kV/27kV, divided into ten reactors, and the reactor single section is 81kVA/27kV/3A/40H. The reactor combination can meet the test requirements of the above subjects.
Frequency conversion series resonance withstand voltage test device/Tester
Technical specifications and performance of main components Frequency conversion power control box KDXZ-30kVA/380V 1
Technical parameter
Input working power supply: three-phase 380V±10%, 50Hz.
Output voltage and current: 0 ~ 400V, maximum current 75A.
Output frequency: 30 ~ 300Hz, frequency adjustment fineness 0.1Hz, instability < 0.05%.
Rated output capacity: 30kVA
Overall size and weight: 420×340×450mm; 30kg
Performance characteristics
Parameter setting: Test voltage, withstand voltage time, test mode, test current, and other parameters can be set or selected.
Test mode: manual test mode, automatic test mode
a, manual test mode: with boost, tuning (including manual, automatic), buck (manual automatic) functions.
b, automatic test mode: After entering the test state, automatically tune, boost, timing, buck, cut off the main loop and turn to the test result interface.
Protection functions and information tips: With high voltage overvoltage, low voltage overcurrent protection, as well as out-of-tune protection, zero, discharge protection and other multiple protection functions.
Data storage function: test results saving, back check, etc.
A. Test results: After the manual or automatic test is completed, the detailed parameters of the test can be displayed in the test results interface, and the parameters can be saved in the memory, which is a non-volatile memory and can save 200 test records.
B. Data query: the saved test result data can be displayed on the screen.
Automatic voltage regulation function: The system automatically tracks and maintains the stable test voltage according to the set test voltage or the manual voltage boost result, and the voltage stability can reach 1%.
Frequency range setting: The frequency range can be set to 20 ~ 300Hz.
Overvoltage protection function: software overvoltage protection value, rich high voltage overvoltage protection function, more safety, effectively protect the safety of people, equipment and test products. Overcurrent protection: the overcurrent protection value can be manually set; When the output current of the whole device reaches the protection setting value, the whole device is automatically cut off Breakdown protection: with discharge or flashover protection function, when the high-voltage side occurs to the ground flashover, automatically cut the whole device. It will not cause harm to the test equipment and human body, and the electronic components in the inverter power supply will not break down
Power off protection: After the test power off, the device can be quickly protected
Excitation transformer JLB - 30 kva / 1.5 kV / 2.5 kV / 5 kV / 15 kV / 0.4 kV 1
Configuration features: High voltage, low current, short time and low voltage, high current, long time trial test processing separately, configure different tap excitation change, to ensure the utilization of excitation transformer and lightweight. When testing electrical equipment such as 10kV cables, use 1.5kV output terminal; When testing 35kV cables and other electrical equipment, use 2.5kV output terminal; 110kV cable,13.8kV generator test, use 5kV output; During the test of 110kV substation, 15kV output terminal is used;
Frequency conversion series resonance withstand voltage test device/Tester
Technical parameter
Rated capacity: 30kVA
Input voltage: 0 ~ 400V
Output voltage: 1.5kV; 2.5 kV; 5kV; 15kV
Operating frequency range: 30 ~ 300Hz
Working time: 60min
Overall size and weight: 460×350×450mm; 135kg
Scope of application: electrical main equipment test and cable test
Performance characteristics
Incentive to dry structure, no oil leakage.
Electrostatic shielding layer is arranged between high and low voltage winding and iron core, which is both excitation transformer and isolation transformer.
Built-in overvoltage protection to prevent breakdown counterattack.
High voltage resonant reactor DK-81kVA/27kV 10 sets
Frequency conversion series resonance withstand voltage test device/Tester
Technical parameter
Rated maximum operating voltage: 27kV (RMS)
Rated maximum working current: 3A (effective value)
Rated capacity: 81kVA
Rated inductance: 40H
Operating frequency: 30 ~ 300Hz
Working time: 60min
Dimensions and weight: φ400×350mm; 60kg/ set
Performance characteristics
The high voltage resonant reactor adopts vacuum epoxy as a whole casting, with hydrophobic layer outside, good moisture resistance, insulation and heat resistance grade F, which meets the requirements of the national code for dry reactors.
The reactor is portable, small size and light weight.
The reactor is equipped with an anti-eddy current insulated base, which is overlapped in series to reduce the overall height, reduce labor intensity and enhance safety and stability.
Capacitive voltage divider FC-270kV/500pF 1
Frequency conversion series resonance withstand voltage test device/Tester
Technical parameter
Working mode: pure capacitive
Rated voltage: 270kV RMS
Rated capacity: 500pF
Operating frequency: 30 ~ 300Hz
Measurement error: < 1.5%
Dimensions and weight: φ120×1000mm; 8kg(2 PCS)
Performance characteristics
Continuous operation for 1 hour at rated voltage.
In the range of 30 ~ 300Hz, its accuracy and stability remain unchanged.
Dielectric loss at 20ºC, 0.4 ~ 0.5UN: ≤0.15
Partial pressure ratio error: less than 1.5% when effective value,
The capacitors of the high and low pressure arms adopt the same medium structure, the temperature coefficient is small, the angular displacement is small, and the partial pressure ratio is unchanged within 30~300H.
The voltage is measured by a dedicated test lead to the variable frequency power supply.
System execution standard
GB50150-2006: "Electrical Equipment handover test Standard for Electrical Equipment Installation Engineering"
DL/T849.6-2004: "General technical conditions for special test instruments for power equipment - Part 6: High-voltage resonance test equipment"
JB/T9641-1999: "Test Transformer"
GB10229: The Reactor GB/T.311-1997: "Insulation and Coordination of High-voltage Power transmission and transformation Equipment" DL/T846-2004: General Technical Conditions for High Voltage Test Equipment
Gb4773-1984: Safety Requirements for Electronic Measuring Instruments
GB2900: Electrician Terminology
GB4208: "Shell Protection Level"
GB191: "Packaging, Storage and Transportation Marks"
GB/T16927-1997: "High Voltage Test Technology"
Frequency conversion series resonance withstand voltage test device/Tester
Working environment
1. Ambient temperature: -150C - 400C;
2. Relative humidity: ≤90%RH;
3. Altitude: ≤3500 meters;
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