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2020-12-08 14:11
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Area：Hubei
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Website：http://www.hvcablehipot.com/ http://goldhomehipot2020.304hmtg.com/
AC Resonant Test System 4000kvA/800kV
| Product description |
AC Resonant test system is mainly used for conducting the on-site AC dielectric test for electric equipment with large capacity, including medium-low voltage, high voltage and ultra-high voltage XLPE, GIS, motor stator, large-sized transformer and electric capacitor.
The series variable frequency resonant system is to change the system inductance and test frequency to make circuit in resonant condition. Its electric circuit is shown in Fig.1. The adoption of variable frequency resonant technology reduces the capacity of power source and the weight of equipment, which facilitates on-site test.
Fig.1
Hot tag: series resonance test set,ac dielectric test system supplier,resonance hipot test device,cable withstand voltage test device manufacturer.
| 4000kvA/800kV Variable Frequency Resonant test set applied test object |
Device combine Test object |
Reactor: 1000kVA/200kV 4 pcs |
Exciting transformeroutput selection |
110kV，630mm2，3km power cable |
4 pcs in parallel |
6kV |
220kV，630mm2，1.2km power cable |
4pcs,2 in series, 2group in parallel |
12kV |
110 kV power system、busbar、GIS,etc |
2 pcs in series |
12kv |
220 kV power system、busbar、GIS,etc |
3 pcs in series |
12kv |
500 kVpower system、busbar、GIS,etc |
4 pcs in series |
36kv |
| Advantage |
1. The required power supply capacity is greatly reduced. The series resonant power supply uses the resonant reactor and the capacitor resonance to generate high voltage and large current. In the whole system, the power supply only needs to provide the part of the system that consumes power. Therefore, the power required for the test is only 1/Q of the test capacity.
2.The weight and volume of the equipment is greatly reduced. In the series resonant power supply, not only the bulky high-power voltage regulating device and the ordinary high-power power frequency test transformer are omitted, but also the resonant excitation power supply only needs to test the capacity of 1/Q, so that the weight and volume of the system are greatly reduced, generally 1/10-1/30 of the common test device.
3. Improve the waveform of the output voltage. The resonant power supply is a resonant filter circuit, which can improve the waveform distortion of the output voltage and obtain a good sinusoidal waveform, effectively preventing the harmonic breakdown of the testing sample from being accidentally broken.
4. Prevent large short-circuit currents from burning the point of failure. In the series resonance state, when the insulation weak point of the sample is broken, the circuit is immediately detuned, and the loop current rapidly drops to 1/Q of the normal test current. When the parallel resonance or test transformer method is used for the withstand voltage test, the breakdown current immediately rises several tens of times. Compared with the two, the short-circuit current and the breakdown current are hundreds of times different. Therefore, series resonance can effectively find the insulation weakness, and there is no big short-circuit current burn failure point.
5. No recovery over voltage will occur. When the testing sample breaks down, the high voltage also disappears immediately due to the loss of the resonance condition, the arc is extinguished immediately, and the recovery voltage is re-established for a long time. It is easy to disconnect the power supply before reaching the flash voltage again. This voltage recovery is an intermittent oscillation process of energy accumulation, and the process is long, no recovery over voltage occurs.
| Product main parameter |
Item |
Configuration |
Main parameter |
Quantity |
1 |
High voltage reactor |
JLB-200kVA/6kV12kV/36kV/0.2kV/0.4kV |
1set |
2 |
Variable-frequency power source |
CHXB-F-200kW/0.22/kV/0.38kV |
1 set |
3 |
High voltage reactor |
DK-1000kVA/200kV |
4 sets |
4 |
High voltage reactor |
FCR-800kV/750pF |
1 set |
5 |
Testing cable |
1 set |
|
6 |
Insulating support |
1set |
All Specifications can be customized according to client’s requirements.
| 4000kvA/800kV Variable Frequency Resonant factory release test picture |
| Reference date of equivalent capacitances of common testing object of AC resonant test system |
C=εΑ/d ,ε---permittivity of medium，Α---electrode area，d---Electrode distance
Appendix 1. List of electricity capacity of several common subjects
| Testing object | Capacitance |
Power transformer 1-100MVA |
1-6MVA：3000-10000pF |
10MVA：5000-12000 pF | |
20MVA：7500-15000 pF | |
60MVA：13000-20000 pF | |
100MVA：15000 Pf-20000 pF | |
300MVA：20000 Pf-30000 pF |
|
CVT |
3000-5000 pF |
HV circuit breaker、CT、PT |
100-1000 pF |
Swichgear（common and SF6） |
300-1000 pF |
high-pressure pipe |
50-600 pF |
Insulator |
<100 pF |
Insulation tool |
10-100 pF |
overhead conductor and bus(per meter) |
8-10 pF |
Appendix 2：35KV And 35kV below capacitance of cable
| Cross-sectional area of the single conductor （mm²;） | 18/20KV |
6/6KV |
8.7/10KV |
26/35KV |
μF/KM |
μF/KM |
μF/KM |
μF/KM |
|
25 |
0.1163 |
0.1922 |
0.1567 |
0.0992 |
35 |
0.1251 |
0.2116 |
0.1725 |
0.1061 |
50 |
0.1362 |
0.2357 |
0.1917 |
0.1150 |
70 |
0.1508 |
0.2693 |
0.2167 |
0.1263 |
95 |
0.1643 |
0.2999 |
0.2400 |
0.1368 |
120 |
0.1760 |
0.3266 |
0.2603 |
0.1460 |
150 |
0.1893 |
0.3570 |
0.2834 |
0.1563 |
185 |
0.2026 |
0.3873 |
0.3123 |
0.1665 |
240 |
0.2207 |
0.4296 |
0.3439 |
0.1805 |
300 |
0.2387 |
0.4706 |
0.3755 |
0.1945 |
400 |
0.2648 |
0.5311 |
0.4213 |
0.2146 |
500 |
0.2876 |
0.5839 |
0.4613 |
0.2321 |
630 |
0.3151 |
0.6481 |
0.5099 |
0.2533 |
Appendix 3：110KV、220KV capacitance of cable
110KV |
220KV |
||
Cross-sectional area of the single conductor（mm²;） |
Capacitance（μF/KM） |
Cross-sectional area of the single conductor（mm²;） |
Capacitance（μF/KM） |
240 |
0.136 |
240 |
0.110 |
300 |
0.147 |
300 |
0.117 |
400 |
0.165 |
400 |
0.125 |
500 |
0.182 |
500 |
0.134 |
630 |
0.201 |
630 |
0.144 |
800 |
0.224 |
800 |
0.155 |
1000 |
0.265 |
1000 |
0.180 |
1200 |
0.282 |
1200 |
0.190 |
1400 |
0.198 |
||
1600 |
0.204 |
||
1800 |
0.212 |
||
2000 |
0.222 |
||
| FAQ |
1.Can you provide the training for us?
Yes, we can provide free training for our client at our factory.
If you require the training on-site, we also can arrange accordingly.
We have 10 seasoned engineers who become our technical team, they flied many countries for client’s installation and commissioning!
2.What is your after-sale service
We have 10 seasoned technical engineer as the after-sale service team.it is lead by our duty manager. We promise that our engineer can give answers within 1 hour and deal with equipment failure within 24 hours in time.
3.What’s the warranty period ?
Our warranty period is one year .
The product can be replaced within 1 month, can be repaired for free charge for one year and maintenance for lifetime.
What is more, our warranty can be extended only charged small warranty fee.
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