Product
NR-BX/GX (Variable Frequency/Power Frequency) Series Resonance Test Equipment
Used for withstand voltage tests of capacitive test pieces with large capacity and high voltage, such as high-voltage cables, generators, large transformers, GIS, and CVT.
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Product description
Used for withstand voltage testing of capacitive test pieces with large capacity and high voltage, such as high-voltage cables, generators, large transformers, GIS, and CVT. When performing AC withstand voltage tests on large-capacity test pieces, the testing equipment often needs to have a large capacity as well, resulting in bulky equipment weighing tons, making transportation extremely inconvenient, especially unsuitable for on-site testing. To address this issue, our company has developed the NR-BX series variable frequency resonant testing equipment and NR-GX series power frequency resonant testing equipment. The variable frequency resonant testing equipment adjusts the power supply frequency, while the power frequency resonant testing equipment adjusts the reactor to achieve resonance between the reactor and the capacitive test piece, thereby obtaining high voltage and large current on the test piece. The variable frequency main unit uses a dedicated SPWM digital waveform generation chip, with small waveform distortion and stable frequency; it uses a quadrature asynchronous fixed-carrier modulation method to ensure good output waveform in the entire frequency range; the power part uses an advanced IPM module to ensure instrument stability and safety with minimum weight. The variable frequency resonant boosting device consists of a frequency-adjustable voltage regulator, an excitation transformer, a reactor, and a capacitive voltage divider. During the design process, the equipment requires that the weight of components that can be moved on-site by a single person does not exceed 30kg, and the weight of components that can be moved on-site by two people does not exceed 60kg, suitable for on-site transportation; the reactor part uses dry epoxy casting, which is beautiful and reliable, and meets the requirements of AC withstand voltage testing for various large-capacity test pieces.
◆ Simple operation: Two modes, automatic testing (automatic resonance point search and automatic voltage increase) and manual testing (manual resonance point search and manual voltage increase), adapt to different testing requirements;
◆ Can set test voltage, frequency adjustment range, protection current, and pressurization time;
◆ Software fine-tuning of frequency and voltage;
◆ Has grounding and flashover protection functions;
◆ Can automatically track changes in grid voltage and adjust voltage in real time to maintain stable high voltage;
◆ Small size and light weight.
◆ Rated output voltage: 0～1000kV
◆ Output frequency: 30～300Hz
◆ Resonant voltage waveform: Pure sine wave, waveform distortion rate <1.0%
◆ Continuous operating time: 30min continuous operating time under full power output
◆ Quality factor: 30～90
◆ Frequency adjustment sensitivity: 0.1Hz, instability <0.5%
◆ Operating power supply: 220V/380V±15%，50Hz±5%
Series product configuration and applicable range/cable
|
Product Model Name |
Detailed Product Configuration |
|||
|
Variable Frequency Source |
Reactor |
Excitation Transformer |
Applicable Range |
|
|
NR-BX-44/22 |
2.5kW |
1A/22kV two units |
2.5kVA |
10kV cable ≤1kM(300m㎡) |
|
NR-BX-88/22 |
4kW |
2A/22kV two units |
4kVA |
10kV cable ≤2kM(300m㎡) |
|
NR-BX-132/22 |
6kW |
2A/22kV three units |
6kVA |
10kV cable ≤3kM(300m㎡) 35kV cable ≤1kM(300m㎡) |
|
NR-BX-176/22 |
7.5kW |
2A/22kV four units |
7.5kVA |
10kV cable ≤4kM(300m㎡) 35kV cable ≤1kM(300m㎡) |
|
NR-BX-264/22 |
10kW |
2A/22kV six units |
10kVA |
10kV cable ≤6kM(300m㎡) 35kV cable ≤2kM(300m㎡) |
|
NR-BX-330/22 |
15kW |
2.5A/22kV six units |
15kVA |
10kV cable ≤8kM(300m㎡) 35kV cable ≤2kM(300m㎡) Also applicable for 10-35kV switches and transformers |
|
NR-BX-640/32 |
25kW |
2.5A/32kV eight units |
25kVA |
10kV cable ≤10kM(300m㎡) 35kV cable ≤4kM (300m㎡) 110kV cable ≤1kM (400m㎡) Compatible with 35-110kV GIS |
|
NR-BX-1280/32 |
50kW |
5A/32kV eight units |
50kVA |
10kV cable ≤20kM (300m㎡) 35kV cable ≤8kM (300m㎡) 110kV cable ≤2kM (400m㎡) Compatible with 35kV-110kV GIS |
|
NR-BX-1950/130 |
100kW |
3.75A/130kV four units |
100kVA |
110kV main transformer, switchgear, cable ≤2.5kM; 220kV GIS |
|
NR-BX-3250/130 |
150kW |
6.25A/130kV four units |
150kVA |
110kV cable ≤5kM; 110kV-220kV main transformer, switchgear, GIS |
◆ Scope of application: Without special instructions, the cable length of 10kV given in the table above is 2.0 times the withstand voltage under the condition of 30～300Hz. If it is 2.5 times the withstand voltage, the cable length should be reduced by 33% accordingly. Users can optionally configure compensating capacitors and protective spark gaps.
Substation equipment
|
Product Model Name |
Detailed Product Configuration |
|||
|
Variable Frequency Source |
Reactor |
Excitation Transformer |
Test object and scope of application |
|
|
NR-BX-108/108 |
5kW |
27kV/1A four units |
5kVA |
Power transformers, circuit breakers, busbars, and insulators at 35kV and below voltage levels; 10kV (300 m㎡) cable 2kM; 35kV (300 m㎡) cable 0.3kM |
|
NR-BX-135/108 |
7.5kW |
27kV/1.25A four units |
7.5kVA |
10kV (300 m㎡) cable 3kM; 35kV (300 m㎡) cable 0.5kM; 35kV switchgear, insulators, etc. |
|
NR-BX-216/216 |
10kW |
54kV/1A four units |
10kVA |
110kV fully insulated main transformer, circuit breaker, busbar, GIS ≤10 sections; 35kV (300 m㎡) cable 1kM; 10kV (300 m㎡) cable 3kM |
|
NR-BX-270/270 |
15kW |
54kV/1A five units |
15kVA |
110kV main transformer, switchgear, GIS; 35kV cable ≤1.5kM; 10kV cable ≤5kM |
|
NR-BX-200/400 |
10kW |
100kV/0.5 four units |
10kVA |
220kV switchgear, GIS; 110kV main transformer, switchgear, GIS |
|
NR-BX-400/400 |
20kW |
100kV/1A four units |
20kVA |
35-220kV main transformer, switchgear, GIS; 35kV cable ≤1kM; 10kV cable ≤4kM |
|
NR-BX-520/260 |
25kW |
65kV/2A four units |
25kVA |
110kV fully insulated main transformer, circuit breaker, busbar, GIS ≤10 sections, (300 m㎡) cable 0.8 kM; 35kV (300 m㎡) cable 3kM; 10kV (300 m㎡) cable 6kM |
|
NR-BX-500/500 |
20kW |
125kV/1A four units |
20kVA |
220kV and below voltage transformers, current transformers, bushing, post insulators, isolating switches, circuit breakers, insulating tools |
|
NR-BX-600/600 |
30kW |
120kV/1A five units |
30kVA |
35-220kV main transformer, switchgear, GIS, insulators; 110kV cable ≤0.8kM; 35kV cable ≤1.1kM |
|
NR-BX-1600/800 |
60kW |
200kV/2A four units |
60kVA |
35-500kV main transformer, switchgear, GIS, insulators; 220kV cable ≤0.5kM; 110kV cable ≤0.8kM |
Generator
|
Product Model Name |
Applicable generator capacity |
Number of reactor units |
|
NR-GX-200/25 |
Generator 0.4～1.0uF (10kV/40MW) |
200kVA/25kV adjustable reactor one unit |
|
NR-GX-300/50 |
Generator 0.27～0.33Uf (20kV/300MW) |
300kVA/50kV adjustable reactor One unit |
|
NR-GX-600/50 |
Generator 0.113～0.45uF (20kV/600MW) |
200kVA/50kV fixed reactor one unit: 400kVA/50kV adjustable reactor one unit |
|
NR-GX-1200/50 |
Generator 0.6～1.8uF (20kV/250MW) |
200kVA/50kV fixed reactor two units: 800kVA/50kV adjustable reactor one unit |
◆ Due to the relatively small adjustment range of power frequency resonance, there are certain gaps in the table above, which can be adjusted according to the actual generator capacity and test voltage level.
◆ The above listed models are some of the company's conventional products. If different configurations are required, different configurations can be customized according to the parameters of the test sample.
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