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Summary of Contents for Huazheng HZ-600A
- Page 1 HZ-600A Sweep Frequency Response Analyzer User Manual Huazheng Electric Manufacturing (Baoding) Co., Ltd...
- Page 2 (0312) 6775656 to tell you to ser ve you at all times- Baoding Huazheng Elect ric Manufact uring Co. , Lt d. , our company will def initely make you satisf ied !
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Page 3: Table Of Contents
Contents I. Overview............................2 II.Main functions and features......................2 III.Main Technical index........................3 IV.Method of operation........................3 V.Tester Maintenance........................13 VI.Precautions..........................13 VII.Ordering and Service........................15 VIII.Packing list..........................15 Appendix 1: The relationship between the correlation coefficient and the degree of transformer winding deformation....................16... -
Page 4: Overview
I. Overview The Sweep Frequency Response Analyzer is used for power transformer with voltage grade of 6kV and above and other transformers with special purpose. The power transformer is inevitably vulnerable to impulse of various fault short-circuit current or physical collision in the process of operation and transportation and the transformer windings may lose stability under the powerful electro-dynamic force exerted by such short-circuit current, which could result in permanent deformations such as local distortion, swell or dislocation and will severely affect safe operation of the transformer. -
Page 5: Iii.main Technical Index
13.Software management function is powerful that takes into full account of site use demand. Measuring data is automatically saved and exported to form Word version test report (require installation of relevant Office software) or JPG photo report to facilitate the user to export test report. - Page 6 Repeat above process until all winding tests are done Analyze data Export report Turn off software Power off collector Disconnect collector and computer Remove transformer winding Test completed. 2.Preparation Note: basic operations of computer and Windows operating system are not contained in the operation instructions.
- Page 7 Frequency Response Analyzer as well as enclosure and core of the “tested transformer” are grounded together. 3.2 Winding Wiring Mode Figure 2 Wiring type It is recommended to input frequency sweep signal of winding deformation frequency response test from tail end of winding and output from initial end, suspended for non-tested winding.
- Page 8 Interior Connection △ Wiring Wiring mode of interior connection △ wired winding is as shown in Figure 5. In this test, input impedance is connected to c and output impedance to a，on behalf of a phase. In this test, input impedance is connected to a and output impedance to b，on behalf of b phase.
- Page 9 Figure 6 Exterior Connection Δ Wiring Transformer with Balance Winding The transformer with balance winding must be ungrounded in test, as shown in Figure 7. Figure 7 Wiring of Balance Winding 4.System Test 4.1 Start of “SFRA test” Program Double click the icon of “SFRA test”...
- Page 10 sweeping. Click the label to switch between the two modes. Start frequency label: to display start frequency of current sweeping. Click the label to switch among different start frequencies. Stop frequency label: to display stop frequency of current sweeping. Sweeping point number label: to display total point number of current sweeping. Click the label to switch among different point numbers.
- Page 11 Keys in the function key area (G) will switch automatically and display dynamically based on the use function. “DSA analysis”: used for correlation analysis. “Information Show”:used for show/hide information input-plane. Quit system. 4.2 Frequency Response Method Test Environment and Wiring Confirmation ...
- Page 12 Please input carefully according to the transformer nameplate while inputting information as all information is automatically saved together with the test result and incorrect input may affect the contents of the report. Sweeping Mode Confirmation and Modification 1、 Selection of Sweeping Mode Click “Stop Frequency”...
- Page 13 The above adjustment is used for setting of default information that is distinguished by the value of “stop frequency”. Actually, adjustment is generally performed as required during the first time use in practical application and is not performed later unless there is regulation or special requirement.
- Page 14 clicked in the test process, which contains waveform display, input voltage peak value (red), response voltage peak value (yellow), amplification factor and X-coordinate time information used for signal research. 4.3 Correlation Analysis Curves in area E are automatically divided into three groups, 1-3 as a group, 4-6 as a group and 7-9 as a group and correlation analysis of each group of curves is performed inside the respective group.
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Page 15: V.tester Maintenance
4.4 Data Echo The system is able to echo saved data. By selecting name of power station, name of transformer, test category and time, as well as winding type and time in turn in area F, the completed test result is called out. By default, the data is displayed at the position of the first curve and displayed downwards with progressive increase of the selection result. - Page 16 Equipment irrelevant to the tester cannot share power supply terminal with the tester. Power supply of the system must be provided with reliable grounding to prevent the risk of electric shock. Operators cannot leave the test site in the process of equipment operation. The transformer core must be reliably grounded with enclosure.
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Page 17: Vii.ordering And Service
VII.Ordering and Service 7.1 Damages of the tester as a result of product quality issue within three years since its delivery will be repaired free of charge; for damages due to other reasons, the Company only charges repair cost. 7.2 We provide lifetime maintenance and technical services for the products. 7.3 Please contact us immediately upon discovery of any abnormality in the tester. -
Page 18: Transformer Winding Deformation
Appendix 1: The relationship between the correlation coefficient and the degree of transformer winding deformation The transformer winding deformation tester of our company strictly follows the power industry standard DL/T911-2016 "Frequency Response Analysis Method of Power Transformer Winding Deformation" to analyze the degree of transformer winding deformation.
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