Deformation Tester Model: DL-HWBR
Deformation TesterIt is used to test power transformers of 6KV and above voltage levels and other special-purpose transformers. During operation or transportation, power transformers inevitably suffer from various fault short-circuit currents or physical impacts. Under the strong electric force generated by short-circuit current, the transformer winding may lose stability, leading to local distortion, bulging, or displacement and other deformation phenomena, which will seriously affect the safe operation of the transformer. According to the power industry standard DL/T911-2004, the frequency response analysis method is used to measure the winding deformation of transformers. It detects the amplitude-frequency response characteristics of each winding of the transformer and compares the test results longitudinally or horizontally. Based on the degree of change in the amplitude-frequency response characteristics, it determines the possible winding deformation of the transformer.
Deformation Tester DL-HWBR consists of a measurement part and an analysis software part. The measurement part is a black box composed of signal generation and signal measurement, and the analysis part is completed by a laptop computer. The measurement part is connected to the laptop via USB, and can also be connected via wired or wireless Ethernet.
Technical Features
☆ During the test, only the connecting busbar of the transformer needs to be removed, and all tests can be completed without lifting the transformer cover or disassembling it.
☆ The acquisition control adopts a high-speed, highly integrated microprocessor.
☆ USB communication interface between PC and instrument.
☆ The hardware movement uses DDS dedicated digital high-speed frequency sweep technology (from the United States). Through testing, it can accurately diagnose faults such as winding distortion, bulging, displacement, tilting, inter-turn short circuit deformation, and phase-to-phase contact short circuit.
☆ High-resolution dB value measurement, dual-channel 16-bit A/D (field test changing the tap changer will show obvious output changes).
☆ The signal output amplitude can be adjusted by software, with a large amplitude peak of ±10V.
☆ The computer generates electronic documents (WORD) of the test results.
☆ Precision, high-stability components are selected. For repeated tests on the same phase, the measurement repeatability rate is above 99.5%.
☆ The finished circuit board has special surface treatment, resistant to water and harmful gas pollution.
☆ The laptop and measuring instrument are powered by isolated power supplies to eliminate external interference.
☆ The instrument has dual measurement system functions of linear frequency sweep measurement and segmented frequency sweep measurement, compatible with the measurement modes of the two current domestic technical schools.
☆ The amplitude-frequency characteristics comply with the technical indicators for amplitude-frequency characteristic testers. The horizontal coordinate (frequency) has both linear and logarithmic scales, so the printed curves can be either linear or logarithmic, and users can choose according to actual needs.
☆ The detection data automatic analysis system compares the winding similarity among phases A, B, and C horizontally. The results are: ①Excellent similarity ②Good similarity ③Poor similarity ④Very poor similarity. Longitudinal comparison of A-A, B-B, C-C retrieves original data and compares with current data for the same phase to determine winding deformation. The results are: ①Normal winding ②Slight deformation ③Moderate deformation ④Severe deformation.
☆ Fully meets the technical conditions of the power standard DL/T911-2004 "Frequency Response Analysis Method for Power Transformer Winding Deformation".
Technical Parameters
Sweep mode:
(The instrument has dual measurement systems of linear frequency sweep and segmented frequency sweep)
(1) Linear sweep distribution
Sweep frequency range: (1kHz)-(2MHz), 2000 sweep points, resolution 1kHz
(2) Segmented sweep measurement distribution
Sweep frequency range: (0.5kHz)-(1MHz), 2000 sweep points;
(0.5kHz)-(10kHz), resolution 0.02kHz
(10kHz)-(100kHz), resolution 0.2kHz
(100kHz)-(500kHz), resolution 1kHz
(500kHz)-(1000kHz), resolution 1kHz
Frequency response measurement range: (0.5kHz)-(1000kHz)
Measurement speed: 100kHz/s
Output: 10Vpp
Output impedance: 50Ω
Input impedance: 1MΩ
Resolution: 0.001dB
Frequency accuracy: 0.001%
Test interface: Standard Q9 interface
Display: Laptop display
Print: Laptop printer
Working power supply: AC220V±10% 50Hz±1%
Working environment: Temperature -10℃~40℃, Humidity 10%~85%
Weight: 6kg
Volume: 420mm×300mm×200mm
Product Configuration
1. Host: 1 unit
2. Test cable: 3 sets
3. Power cord: 1 piece
4. USB cable: 1 piece
5. Analysis software CD: 1 piece
6. Instruction manual: 1 copy
7. Warranty card: 1 piece
8. Certificate of conformity: 1 piece
Note: The product is subject to change without prior notice. If there is any change, the actual product shall prevail.
Yangzhou Darui Electric Co., Ltd.
Address: No. 88, Chuangye Road, Jiangyang District, Yangzhou City
Phone: 0514-89791882
Fax: 0514-89791883
Website: www.yzdrz.com
