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.
Mga teknikal na parameter
| Mataas na boltahe na output | 0.5~10kV Increasing by 500V for each level, a total of 20 levels, capacity: 1500VA |
| Katumpakan | tgδ: ± (reading * 1.5% +0.06%) |
| Cx: ± (pagbabasa * 1.5% +5 PF) | |
| Resolusyon | tgδ: 0.001% Cx: 0.001pF |
| Saklaw ng pagsukat | 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° | |
| Power supply | AC 220V ± 10% 50/60 ± 1Hz |
| Paraan ng pagsukat | 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 | |
| Harmonic adaptation | ≤3% |
| Kondisyon ng aplikasyon | -15 ℃－50 ℃ |
| Kamag-anak na kahalumigmigan | <80% |
| Dimensyon | 460 (L) × 345 (W) × 345 (H) |
| Timbang | 35kg |
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Product Features:
1.Frequency conversion anti-interference: ang paggamit ng frequency conversion anti-interference na teknolohiya, sa 200% interference ay maaari pa ring tumpak na masukat, ang data ng pagsubok ay matatag, na angkop para sa on-site na anti-interference dielectric loss test.
2.High precision measurement: frequency floating, digital waveform analysis at bridge self-calibration technology, na may high precision three-end standard capacitor, para makamit ang mataas na precision dielectric loss measurement, at positive/reverse connection measurement accuracy and stability ay pare-pareho.
3.All range input resistance ng instrumento ay mas mababa sa 2Ω, inaalis ang impluwensya ng karagdagang kapasidad ng test line.
4. Maaaring konektado sa panlabas na tasa ng langis upang gawin ang katumpakan pagkakabukod langis dielectric pagkawala pagsubok, maaaring konektado sa solid materyal pagsukat elektrod upang gawin ang katumpakan pagkakabukod dielectric pagkawala pagsubok.
5.Good compatibility: awtomatikong kilalanin ang 50Hz / 60Hz system power supply, support generator power supply, kahit na malaki ang frequency fluctuation, maaari ding normal na masukat.
6. Built-in na serye at parallel na dalawang uri ng dielectric loss measurement model, ay maaaring ganap na katugma sa calibration platform at dielectric loss standard, maginhawang instrumento sa pag-verify.
7.Multi-level na proteksyon sa seguridad upang matiyak ang kaligtasan ng personal at kagamitan.
8. Mataas na boltahe na proteksyon: pagsubok short circuit, breakdown o mataas na boltahe kasalukuyang pagbabagu-bago, maaaring putulin ang output sa pamamagitan ng maikling circuit.
9. Proteksyon sa mababang boltahe: maling pagkakakonekta 380V, pagbabagu-bago ng supply ng kuryente o biglaang pagkabigo ng kuryente, proteksyon sa pagsisimula, hindi magiging sanhi ng overvoltage.
10. Grounding proteksyon: ang instrumento grounding ay masama upang ang shell na may mapanganib na boltahe, simulan grounding proteksyon.
11.CVT: mataas na boltahe at kasalukuyang, mababang boltahe at kasalukuyang apat na limitasyon ng proteksyon, ay hindi makapinsala sa kagamitan; Ang maling pagpili ng menu ay hindi naglalabas ng boltahe ng paggulo. Walang 10kV mataas na boltahe na output sa panahon ng pagsukat ng CVT.
12.Anti "pagtaas ng kapasidad": kapag sumusukat ng malaking kapasidad pagsubok ng mga produkto ay lilitaw ang pagtaas ng boltahe "pagtaas ng kapasidad" epekto, ang instrumento ay maaaring awtomatikong subaybayan ang output boltahe, panatilihin ang pagsubok boltahe pare-pareho.
13. Pagganap ng seismic: ang instrumento ay gumagamit ng natatanging disenyo ng seismic, maaaring makatiis ng malakas na panginginig ng boses ng transportasyon sa malayo, kaguluhan nang walang pinsala.
14. Mataas na boltahe na kable: mataas na boltahe na insulated wire, ay maaaring gamitin sa paglilinis ng sahig.
15. Teknikal na pambihirang tagumpay, malakas na pag-andar, na may panlabas na karaniwang interface ng kapasitor, awtomatikong pagsubaybay ng panlabas na pagsubok na dalas ng kapangyarihan 40Hz~70Hz, suporta dalas ng power supply at serye matunog na power supply upang gawin ang malaking kapasidad na mataas na boltahe na pagsubok sa pagkawala ng dielectric.
16.With circuit contact masamang discharge prompt function, upang mapadali ang pagkakakilanlan ng mga kable ay maaasahan.
17. Sa pamamagitan ng pag-andar ng pagsukat ng pamamaraan ng self-excitation ng CVT, ang C1/C2 ay maaaring masukat sa parehong oras, awtomatikong compensation busbar grounding at standard capacitor partial voltage influence, hindi na kailangang baguhin ang linya at panlabas na anumang mga accessory, at mataas na boltahe na linya ng koneksyon ay maaaring linisin mo ang sahig.
18. Sa reverse wiring low voltage shielding function, sa 220kVCVT busbar grounding case, ang C11 ay maaaring isagawa nang walang pagtatalop ng 10kV reverse wiring dielectric loss measurement, at maaaring maging isang koneksyon sa parehong oras sa pangunahing at alipin dalawang pagsukat ng kapasidad.
19. Chinese text menu, malaking screen backlight LCD display.
20.Configuration ng thermal printer, pag-print ng data malinaw at mabilis, walang ingay.
21. Sa kalendaryong orasan, maaaring mag-imbak ng 100 grupo ng data ng pagsukat.
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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.
