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 at 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 consists of a variable frequency power supply control box (operating console), an excitation transformer, a reactor, and a capacitive voltage divider. By connecting a rectifier stack and a microammeter to the capacitive voltage divider, DC withstand voltage tests can be completed. Due to the good filtering characteristics after system resonance, the DC voltage produced is superior to the DC voltage obtained by rectification from ordinary test transformers. It is an ideal withstand voltage equipment for municipal, prefectural, and county-level high-voltage test departments and power installation, repair, and test engineering units.
Functional Features:
1. Reactors of the same voltage level and capacity are smaller in size and lighter in weight; low temperature rise at rated load; dry-type epoxy casting, high mechanical strength
high, 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 selected to meet different test requirements, achieving multi-purpose use of one machine, high cost performance.
Technical Indicators:
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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 60min |
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Quality factor |
30～90 |
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Frequency adjustment sensitivity |
0.1Hz |
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Instability |
＜0.05% |
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Working power supply |
Single-phase 220V or three-phase 380V±10% |
|
Power frequency 50Hz±5% |
YDBPXZ Series Product Configuration and Applicable Scope:
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Product Model and Name |
Applicable Scope (AC withstand voltage equipment for substation electrical equipment at 10kV～500kV voltage levels, frequency 30～300Hz) |
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|
Variable frequency source |
Resonant reactor |
Excitation transformer |
Voltage divider |
Applicable scope |
|
|
SDY801-50/50/25 |
3kW |
25kV/1A two units (dry-type) |
3kVA (dry-type) |
50kV |
1000kVA and below 10kV power transformers 10kV switches, busbars, PT, CT, etc. 10kV (300mm2) cable ≤1.0km |
|
SDY801 -108/108/27 |
5kW |
27kV/1A four units (dry-type) |
5kVA (dry-type) |
110kV |
31500kVA and below 35kV power transformers 35kV switches, busbars, PT, CT, etc. 10kV (300mm2) cable 2km 35kV (300mm2) cable 0.5km |
|
SDY801 -200/200/50 |
10kW |
50kV/1A four units (dry-type) |
10kVA (dry-type) |
200kV |
50000kVA and below 110kV power transformers 110kV GIS, PT, CT, etc. (preventive test) 35kV (300mm2) cable ≤1.0km 10kV (300mm2) cable ≤2.0km |
|
SDY801 -270/270/45 |
15kW |
45kV/1A six units (dry-type) |
15kVA (dry-type) |
300kV |
50000kVA and below 110kV power transformers 110kV GIS, PT, CT, etc. 35kV (300mm2) cable ≤1.2km 10kV (300mm2) cable ≤3.0km |
|
SDY801-800/400/50 |
30kW |
50kV/2A eight units (dry-type) |
30kVA (dry-type) |
400kV |
80000kVA and below 220kV power transformers 50000kVA and below 110kV power transformers 110kV/220kV GIS, PT, CT, etc. 35kV (300mm2) cable ≤2.0km 110kV (300mm2) cable ≤0.7km |
|
SDY801-1600/800/200 |
60kW |
200kV/2A ten units (dry-type) |
60kVA (dry-type) |
800kV |
80000kVA and below 220kV power transformers 50000kVA and below 110kV power transformers 500kV GIS, PT, CT, etc. 220kV switches, GIS, PT, CT, etc. 110kV (400mm2) cable ≤1.5km 220kV (400mm2) cable ≤1.0km |
Due to different voltage levels and test requirements, the configuration size and quantity vary. Please call us for consultation, and we will provide you with a reasonable configuration plan.
