Product Introduction
UHV-340 Transformer Tan Delta Tester is a kind of instrument with high precision fully automatic measuring the dielectric loss tangent and capacitance of various high voltage electrical equipments in the power plants and substations. The adoption of frequency conversion technology could ensure the accurate measurement in the interference of strong electric field.
Parameter teknik
| Keluaran tegangan tinggi | 0.5~10kV Increasing by 500V for each level, a total of 20 levels, capacity: 1500VA |
| Ketepatan | tgδ: ± (reading * 1.5% +0.06%) |
| Cx: ± (membaca * 1,5% +5 PF) | |
| Resolusi | tgδ: 0.001% Cx: 0.001pF |
| Rentang pengukuran | tgδ: 0.001% ~ 100% |
| Internal high pressure : 3PF~60000PF/10KV 60PF～1µF/0.5KV | |
| External high pressure: 3PF~1.5µF/10KV 60PF～30µF/0.5KV | |
| CVT Variable ratio test | Variation ratio measurement accuracy: ± reading *1% |
| The range of the measurement: 10～99999 | |
| Phase measurement accuracy: ±0.1° | |
| Phase measurement range: 0～359.9° | |
| Sumber Daya listrik | AC 220V ± 10% 50/60 ± 1Hz |
| Metode pengukuran | a.single frequency: 45(45Hz measuring)、50(50Hz measuring)、55(55Hz measuring)、60(60Hz measuring)、65(65Hz measuring) |
| b.different frequency: 50D(45Hz/55Hz measure each time) 60D(55Hz/65Hz measure each time) Automatic frequency conversion | |
| Adaptasi harmonis | ≤3% |
| Kondisi aplikasi | -15 ℃－50 ℃ |
| Kelembaban relatif | <80% |
| Dimensi | 460 (L) × 345 (W) × 345 (H) |
| Berat | 35kg |
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Product Features:
1. Konversi frekuensi anti-interferensi: penggunaan teknologi anti-interferensi konversi frekuensi, dalam interferensi 200% masih dapat diukur secara akurat, data pengujian stabil, cocok untuk uji kehilangan dielektrik anti-interferensi di tempat.
2. Pengukuran presisi tinggi: frekuensi mengambang, analisis bentuk gelombang digital dan teknologi kalibrasi mandiri jembatan, dengan kapasitor standar tiga ujung presisi tinggi, untuk mencapai pengukuran kerugian dielektrik presisi tinggi, dan akurasi dan stabilitas pengukuran koneksi positif/terbalik konsisten.
3. Semua resistansi masukan rentang instrumen lebih rendah dari 2Ω, menghilangkan pengaruh kapasitansi tambahan dari garis uji.
4. Dapat dihubungkan ke cangkir minyak eksternal untuk melakukan uji kerugian dielektrik minyak isolasi presisi, dapat dihubungkan ke elektroda pengukuran bahan padat untuk melakukan uji kerugian dielektrik isolasi presisi.
5. Kompatibilitas yang baik: secara otomatis mengidentifikasi catu daya sistem 50Hz / 60Hz, mendukung catu daya generator, bahkan jika fluktuasi frekuensi besar, juga dapat diukur secara normal.
6.Built-in seri dan paralel dua jenis model pengukuran kerugian dielektrik, dapat sepenuhnya kompatibel dengan platform kalibrasi dan standar kerugian dielektrik, verifikasi instrumen yang mudah digunakan.
7. Perlindungan keamanan multi level untuk memastikan keselamatan pribadi dan peralatan.
8. Perlindungan tegangan tinggi: uji korsleting, kerusakan atau fluktuasi arus tegangan tinggi, dapat memotong keluaran dengan korsleting.
9. Perlindungan tegangan rendah: miskoneksi 380V, fluktuasi catu daya atau kegagalan daya mendadak, perlindungan mulai, tidak akan menyebabkan tegangan lebih.
10. Perlindungan grounding: instrumen grounding buruk sehingga shell dengan tegangan berbahaya, mulai perlindungan grounding.
11.CVT: tegangan dan arus tinggi, tegangan rendah dan arus empat batas perlindungan, tidak akan merusak peralatan; Pemilihan menu yang salah tidak menghasilkan tegangan eksitasi. Tidak ada keluaran tegangan tinggi 10kV selama pengukuran CVT.
12.Anti "peningkatan kapasitas": ketika mengukur produk uji kapasitas besar akan muncul efek "peningkatan kapasitas" kenaikan tegangan, instrumen dapat secara otomatis melacak tegangan keluaran, menjaga tegangan uji tetap konstan.
13. Kinerja seismik: instrumen mengadopsi desain seismik yang unik, dapat menahan getaran transportasi jarak jauh yang kuat, turbulensi tanpa kerusakan.
14. Kabel tegangan tinggi: kawat berisolasi tegangan tinggi, dapat digunakan untuk mengepel lantai.
15. Terobosan teknis, fungsi yang kuat, dengan antarmuka kapasitor standar eksternal, pelacakan otomatis frekuensi daya uji eksternal 40Hz ~ 70Hz, mendukung catu daya frekuensi dan catu daya resonansi seri untuk melakukan uji kehilangan dielektrik tegangan tinggi berkapasitas besar.
16. Dengan fungsi cepat pelepasan kontak sirkuit yang buruk, untuk memfasilitasi identifikasi kabel yang dapat diandalkan.
17. Dengan fungsi pengukuran metode eksitasi diri CVT, C1/C2 dapat diukur pada saat yang sama, pembumian busbar kompensasi otomatis dan pengaruh tegangan parsial kapasitor standar, tidak perlu mengubah saluran dan aksesori eksternal apa pun, dan saluran koneksi tegangan tinggi dapat Mengepel lantai.
18. Dengan fungsi pelindung tegangan rendah kabel terbalik, dalam kasus grounding busbar 220kVCVT, C11 dapat dilakukan tanpa menghilangkan pengukuran kerugian dielektrik kabel terbalik 10kV, dan dapat menjadi koneksi pada saat yang sama ke pengukuran kapasitansi utama dan budak dua.
19. Menu teks Cina, layar LCD lampu latar layar besar.
20.Konfigurasi printer thermal, pencetakan data jelas dan cepat, tidak berisik.
21.Dengan jam kalender, dapat menyimpan 100 kelompok data pengukuran.
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Factors affecting dielectric loss
The characteristics of the material itself: the chemical composition, molecular structure, moisture content, impurities, etc. of the insulation material will directly affect its dielectric loss.
Temperature: An increase in temperature usually leads to an increase in the polarity movement of molecules, resulting in an increase in dielectric loss.
Electric field strength: Within a certain range, the higher the electric field strength, the higher the dielectric loss may also increase.
Humidity: Moisture is the "enemy" of insulation materials, which significantly increases their dielectric loss.
Frequency: The frequency of alternating current also has an impact on dielectric loss, which is the origin of the name "heterodyne" tester. It can conduct tests at different frequencies to more comprehensively evaluate insulation performance.
Application Fields
1. Power industry
Power plants and substations: In power plants and substations, dielectric loss testers are mainly used to test the high-precision measurement of dielectric loss tangent and capacitance of various high-voltage power equipment. Its integrated structure and built-in components such as dielectric loss testing bridge, variable frequency voltage regulating power supply, step-up transformer, and SF6 high stability standard capacitor make the testing process more accurate and efficient.
2. Research institutions
Research on High Voltage Electrical Equipment: The dielectric loss tester is suitable for measuring the TG δ and capacitance of high-voltage electrical equipment in workshops, laboratories, and research institutions. Its multiple testing modes (such as internal high voltage, external high voltage, internal standard, external standard, positive connection method, reverse connection method, etc.) can meet different testing needs.
3. In the field of electronic manufacturing
Electronic device design and production: In the design and production process of electronic devices, a dielectric loss tester can measure the dielectric loss at different frequencies to obtain the loss characteristics of the dielectric at different frequencies. This has a significant impact on the working state and performance of the circuit.
4. Insulation material testing
Insulation oil test: Equipped with an insulation oil cup, the dielectric loss tester can test the dielectric loss of insulation oil. It is more sensitive to detecting distributed defects such as overall moisture and aging of insulation or air gap discharge defects in insulation.
Frequently Asked Questions (FAQ)
Q: What types of power equipment is the variable-frequency dielectric loss tester mainly used for?
A: It is widely used for testing various high‑voltage power equipment such as transformers, instrument transformers, cables, switchgear, and insulators.
Q: Is a lower dielectric loss tangent (tan δ) value always better?
A: Yes, a lower tan δ value generally indicates lower dielectric loss of the insulating material, better insulation performance, and a lower risk of failure.
Q: What effect does temperature have on dielectric loss test results?
A: Generally, an increase in temperature enhances molecular polar motion, which leads to higher dielectric loss. Therefore, the actual temperature should be recorded and taken into account during testing.
Q: Besides the variable‑frequency dielectric loss tester, what other methods can be used to evaluate insulation performance?
A: Other methods include DC withstand voltage tests, partial discharge detection, dissolved gas analysis in oil, and various other approaches to comprehensively assess insulation performance.
Q: What advantages does Wuhan UHV Power Technology Co., Ltd. have in the field of power testing?
A: Wuhan UHV Power Technology Co., Ltd. has many years of industry experience, strong R&D capabilities, high product accuracy, stable performance, and provides professional pre‑sales and after‑sales services, making it a trustworthy partner.
