Product Features of Series Resonance Test Device
1. The reactors of the same voltage level and capacity are smaller in size and lighter in weight; under rated load, the temperature rise is small; using 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 functions; 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 access
3. Flexible configuration. Different types of reactors can be optionally configured to meet different test object requirements, achieving multi-purpose use of one machine with high cost performance
Technical Specifications:
Rated Output Voltage |
0～1000kV and below |
Output Frequency |
30～300Hz |
Resonant Voltage Waveform |
Pure sine wave, waveform distortion rate ≤1.0% |
Duty Cycle |
Continuous operation at full power for 60 minutes |
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 Configurations and Applicable Scope:
Product Model and 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 |
10kV power transformers of 1000kVA and below
10kV switches, busbars, PT, CT, etc.
10kV (300mm2) cables ≤1.0km |
BPXZ-108/108/27 |
5kW |
27kV/1A four units
(dry-type) |
5kVA
(dry-type) |
110kV |
35kV power transformers of 31500kVA and below
35kV switches, busbars, PT, CT, etc.
10kV (300mm2) cables 2km
35kV (300mm2) cables 0.5km |
BPXZ-200/200/50 |
10kW |
50kV/1A four units
(dry-type) |
10kVA
(dry-type) |
200kV |
110kV power transformers of 50000kVA and below
110kV GIS, PT, CT, etc. (preventive tests)
35kV (300mm2) cables ≤1.0km
10kV (300mm2) cables ≤2.0km |
BPXZ-270/270/45 |
15kW |
45kV/1A six units
(dry-type) |
15kVA
(dry-type) |
300kV |
110kV power transformers of 50000kVA and below
110kV GIS, PT, CT, etc.
35kV (300mm2) cables ≤1.2km
10kV (300mm2) cables ≤3.0km |
BPXZ-800/400/50 |
30kW |
50kV/2A eight units
(dry-type)
100kV/2A four units
(oil-immersed) |
30kVA
(dry-type)
30kVA
(oil-immersed) |
400kV |
220kV power transformers of 80000kVA and below
110kV power transformers of 50000kVA and below
110kV/220kV GIS, PT, CT, etc.
35kV (300mm2) cables ≤2.0km
110kV (300mm2) cables ≤0.7km |
BPXZ-1600/800/200 |
60kW |
200kV/2A four units
(oil-immersed) |
60kVA
(dry-type) |
800kV |
220kV power transformers of 80000kVA and below
110kV power transformers of 50000kVA and below
500kV GIS, PT, CT, etc.
220kV switches, GIS, PT, CT, etc.
110kV (400mm2) cables ≤1.5km
220kV (400mm2) cables ≤1.0km |
Note: Customized solutions can be provided based on the parameters of the test object.
Capacitive equipment such as transformers, GIS systems, SF6 switches, CT/PT, insulators, busbars, cables, and bushings are the most common primary electrical equipment in substations. According to the test procedures for withstand voltage of primary electrical equipment in substations of 220V and below, the corresponding AC/DC withstand test equipment must not only meet the test conditions of high voltage and low current, but also meet the test conditions of low voltage and high current, requiring a wide range of applicability. 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 stack and microammeter to the capacitive voltage divider, DC withstand voltage tests can be completed. Due to the excellent filtering characteristics after system resonance, the DC voltage it produces is superior to the DC voltage rectified by ordinary test transformers. It is an ideal withstand voltage equipment for municipal, prefectural, and county-level high-voltage testing departments and power installation, repair, and test engineering units.
◆ Reference selection schemes for resonant test devices:
A. Reference selection scheme for cable resonant test devices
B. Reference selection scheme for generator resonant test devices
C. Reference selection scheme for substation electrical equipment resonant devices
D. Reference selection scheme for CVT calibration resonant boost devices
Variable frequency resonance product aliases
AC withstand voltage resonant device, variable frequency series resonance, series resonance, series resonance transformer, series resonance test equipment
