Product Features of Series Resonance Test Device
1. The reactor of the same voltage level and capacity is smaller in size and lighter in weight; the temperature rise is small at rated load; it adopts dry-type epoxy casting, with high mechanical strength, good electrical insulation performance, beautiful and reliable
2. The variable frequency power supply control box has large capacity margin; strong protection function; good output waveform; good stability; multiple working modes, easy operation; single-phase 220V or three-phase 380V input power supply universal, convenient for on-site power supply
3. Flexible configuration. Different types of reactors can be selected to meet different test requirements, achieving multiple uses for one machine, with high cost performance
Technical indicators:
| Rated output voltage |
0～1000kV and below |
| Output frequency |
30～300Hz |
| Resonant voltage waveform |
Pure sine wave, waveform distortion rate ≤1.0% |
| Working system |
Continuous working time at full power 60min |
| Quality factor |
30～90 |
| Frequency adjustment sensitivity |
0.1Hz |
| Instability |
＜0.05% |
| Working power supply |
Single-phase 220V or three-phase 380V±10% |
| Power frequency 50Hz±5% |
Series product configuration and applicable scope:
| Product model name |
Applicable scope (AC withstand voltage test equipment for electrical equipment in substations of 10kV～500kV voltage levels, frequency 30～300Hz) |
| Variable frequency source |
Resonant reactor |
Excitation transformer |
Voltage divider |
Applicable scope |
| BPXZ-50/50/25 |
3kW |
25kV/1A two units
(dry type) |
3kVA
(dry type) |
50kV |
1000kVA and below 10kV power transformer
10kV switch, busbar, PT, CT, etc.
10kV (300mm2) cable ≤1.0km |
| BPXZ-108/108/27 |
5kW |
27kV/1A four units
(dry type) |
5kVA
(dry type) |
110kV |
31500kVA and below 35kV power transformer
35kV switch, busbar, PT, CT, etc.
10kV (300mm2) cable 2km
35kV (300mm2) cable 0.5km |
| BPXZ-200/200/50 |
10kW |
50kV/1A four units
(dry type) |
10kVA
(dry type) |
200kV |
50000kVA and below 110kV power transformer
110kV GIS, PT, CT, etc. (preventive test)
35kV (300mm2) cable ≤1.0km
10kV (300mm2) cable ≤2.0km |
| BPXZ-270/270/45 |
15kW |
45kV/1A six units
(dry type) |
15kVA
(dry type) |
300kV |
50000kVA and below 110kV power transformer
110kV GIS, PT, CT, etc.
35kV (300mm2) cable ≤1.2km
10kV (300mm2) cable ≤3.0km |
| BPXZ-800/400/50 |
30kW |
50kV/2A eight units
(dry type)
100kV/2A four units
(oil immersed type) |
30kVA
(dry type)
30kA
(oil immersed type) |
400kV |
80000kVA and below 220kV power transformer
50000kVA and below 110kV power transformer
110kV/220kV GIS, PT, CT, etc.
35kV (300mm2) cable ≤2.0km
110kV (300mm2) cable ≤0.7km |
| BPXZ-1600/800/200 |
60kW |
200kV/2A four units
(oil immersed type) |
60kVA
(dry type) |
800kV |
80000kVA and below 220kV power transformer
50000kVA and below 110kV power transformer
500kV GIS, PT, CT, etc.
220kV switch, GIS, PT, CT, etc.
110kV (400mm2) cable ≤1.5km
220kV (400mm2) cable ≤1.0km |
Note: Customized solutions can be provided according to the parameters of the test object
Transformers, GIS systems, SF6 switches, CT/PT, insulators, busbars, cables, bushings and other capacitive equipment are the most common primary electrical equipment in substations. According to the test procedures for AC withstand voltage of primary electrical equipment in substations of 220V and below, the corresponding AC/DC withstand voltage test equipment must not only meet the test conditions of high voltage and small current, but also meet the test conditions of low voltage and large current, and must take into account a wide range of applications. Using the principle of series resonance, the main equipment is composed of a variable frequency power supply control box (operation console), excitation transformer, reactor, and capacitive voltage divider. By connecting a rectifier silicon stack and microammeter to the capacitive voltage divider, DC withstand voltage test can be completed. Due to the good filtering characteristics after system resonance, the DC voltage produced is the DC voltage rectified by an ordinary test transformer. It is an ideal withstand voltage equipment for high-voltage test departments at prefecture, city, and county levels, as well as for power installation, repair, and testing engineering units.
◆ Reference schemes for selection of resonance test device:
A. Reference scheme for cable resonance test device
B. Reference scheme for generator resonance test device
C. Reference scheme for substation electrical equipment resonance device
D. Reference scheme for CVT calibration resonance boosting device
Variable frequency resonance product aliases
AC withstand voltage resonance device, variable frequency series resonance, series resonance, series resonance transformer, series resonance test equipment
