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Huazheng HZYDP-30KV Manual

Ultra-low frequency high-voltage generator
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HZYDP-30KV
Ultra-low Frequency High-voltage
Generator
Huazheng Electric Manufacturing (Baoding) Co., Ltd

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Summary of Contents for Huazheng HZYDP-30KV

  • Page 1 HZYDP-30KV Ultra-low Frequency High-voltage Generator 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 !
  • Page 3 Foreword I. Thank you for selecting the product 0 of our company! You can obtain comprehensive technical support and services from our company. II. This product manual is applicable to the FS-VLF-30/1.1 0.1Hz ultra-low frequency high-voltage generator. III. Before using this product, please read the product manual carefully and keep it properly for future reference.

  • Page 4: Table Of Contents

    Contents I. Overview .........................1 II. Advantages of 0.1 Hz Ultra-low Frequency Withstand Voltage Technology ....1 III. Product Features ......................2 IV. Technical Parameters of VLFS Series Products ............3 V. Instrument Structure and Function Description ............5 VI. Operating Instructions ....................6 VII.

  • Page 5: Overview

    I. Overview The high-voltage withstand test of electrical equipment is one of the most important items specified in the Preventive Test of Insulation. The withstand voltage test can be classified into the AC withstand voltage test and the DC withstand voltage test. The AC withstand voltage test can also be divided into power frequency, frequency conversion and 0.1Hz ultra-low frequency test technologies.

  • Page 6: Product Features

    35kV and Below. In 2004, the power industry standard General Technical Specification of Ultra-low Frequency High-voltage Generator DL/T 849.4-2004 was issued, and this latest test method is promoted in our country at present. Although the DC withstand voltage test equipment has the advantages of small size, light weight, low cost, etc., the DC withstand voltage test is also the most destructive to insulation of the tested product.

  • Page 7: Technical Parameters Of Vlfs Series Products

    Model★ M Measuring Range Weight Purpose Voltage ≤1.1μF @ 0.1Hz Cables, Controller: 4kg generators with ≤2.2μF @ 0.05Hz HZYDP-30KV 30kV Booster: 25kg voltage of 10kV ≤5.5μF @ 0.02Hz and below ≤1.5μF @ 0.1Hz Cables, Controller: 5kg ≤3.0μF @ 0.05Hz generators with...
  • Page 8 ≤2.2μF @ 0.05Hz Booster: 45kg generators with voltage of 35kV ≤5.5μF @ 0.02Hz and below Table 1 Main Technical Parameters of VLFS Series Ultra-low Frequency High-voltage Generator ★ Power supply: 220V±10%, 50±5%Hz Note: When a portable generator is used for supplying power, it is required that output voltage and frequency of the generator shall be stable (generally it is required that power shall be greater than 3 kW, the frequency shall be 50 Hz, and voltage shall be 220V±5%), otherwise some assistance measures...

  • Page 9: Instrument Structure And Function Description

    V. Instrument Structure And Function Description This instrument consists of two parts: i.e. the controller and the booster. The structures and functions of the two parts are as follows: 1. Schematic diagram of controller panel The layout for the components of the controller panel is as shown in Figure 1. The functions of each component are as follows: Figure 1 Schematic Diagram of Controller Panel “Ground”...

  • Page 10: Operating Instructions

    2. Schematic diagram of booster structure Control input High voltage output floor Figure 2 Schematic Diagram of Booster Structure 3. Schematic diagram of display screen Figure 3 Schematic Diagram of Display Screen VI. Operating Instructions 1. Wiring method Wiring instructions: Use two private wires and the grounding wire enclosed with the product to connect as shown .
  • Page 11 enters the interface as shown in Figure 5. Turn off the power when the instrument is wired, disconnected or temporarily not in use. The power socket shall be installed with a fuse. If there is no display on the boot screen, check whether the fuse is blown first, and the fuse shall be replaced according to the data provided in Table 1.
  • Page 12 Figure 5 Parameter Selection Interface Click the frequency checkbox below frequency selection to select the output frequency. ★ There are three options of: 0.1, 0.05 and 0.02 for frequency, which is measured in ★ Modification range of test time: 0-60 minutes. It specifies the length of the test time in minutes.
  • Page 13 Click the “Start” button: Enter the automatic testing interface (as shown in Figure 8). Figure 7 (4) Auto boost After clicking the “Start” button as shown in Figure 6, the instrument will carry out the voltage stepping up test according to the following process under control of the computer: Self-inspection →...
  • Page 14 automatically shut down. ★ Manual shutdown: Click the "Stop/ discharge” button to shut down. These two shutdown modes are normal shutdowns. The prompt interface as shown in Figure 9 will appear after shutdown. Generally, when current has no abnormality and the tested product has no discharge phenomenon or over-current protection, it can be considered that it passes the test.
  • Page 15 Figure 9 (7) View historical data Figure 10 Click the "Data View" button in the main menu to enter the Figure 11 interface to view the stored data.
  • Page 16 Figure 11 Figure 12 It can save 50 groups of data. In the data, the testing time (year, month, date, hour, minute and second), the test voltage value, the test current value, and the test duration are recorded. (8) Help documentation Click the “Help documentation”...
  • Page 17 shown in Figure 13 to view help information. Figure 13 Click each navigation button on the page to respectively enter different help interfaces, as shown in the figures.
  • Page 19 (9) Version information Click “Version information” on the main page, the system skips to the page as shown in the figure, and the system version information is displayed. (10) Click the “Data communication” button, the system click to the page as shown in the figure.
  • Page 20 (11) System setting Click the “System setting” button in the main menu, the system skips to the page as shown in the figure to modify the current time.

  • Page 21: Withstand Voltage Test Methods Of Power Cables

    VII. Withstand Voltage Test Methods Of Power Cables 1. Disconnect all electrical equipment connected to the cable under test. 2. Use a megameter to test the insulation parameters for each phase of the cable. Only after passing the test can the ultra-low frequency withstand voltage test be carried out. 3.
  • Page 22 voltage, in kV. Example 2: The length for a model of 10 kV (U =10kV, U =8.7kV) cable is 4 km, the single-phase-to-ground capacitance is 0.21uF/km, and the 0.1 Hz ultra-low frequency test voltage is 26 kV (peak), the leakage current is approximately: Ｉ...

  • Page 23: Withstand Voltage Test Methods Of Synchronous Motor

    Figure 14 Wiring Diagram for Single-phase Cable Test 7. After the test time is up, the instrument will shut down automatically. If no destructive discharge occurs during the test, it is considered to have passed the withstand voltage test. 8. In the process of boosting and voltage withstanding, if the output waveform is abnormally distorted, the current is abnormally increased, the voltage is unstable, the test cable has peculiar smell, smoke, abnormal noise or flashover, etc., the boosting shall be stopped immediately.
  • Page 24 1. This test can be carried out during handover, overhaul, local replacement of windings and routine tests. The withstand voltage test of the motor with 0.1 Hz ultra-low frequency is more effective than the power frequency withstand voltage test for the defects of the generator end insulation.

  • Page 25: Notes

    Uo: Rated voltage (kV) of stator winding for synchronous motor For example: For a synchronous motor with rated voltage of 10.5 kV, the calculation method for the peak value of the ultra-low frequency test voltage is: Umax= 2 ×1.2×1.5×10.5≈26（kV） 4. Test time setting: The same as the test time of power frequency withstand voltage, generally 1 min.

  • Page 26: Transportation And Storage

    High voltage output line Connecting line Fuse Discharge rod Compensating capacitor Printing paper Specification Packing list Test report XI. Transportation And Storage (1) Transportation This product must be packed during transportation. The packing box can be a carton or a wooden box, and the packing box shall be lined with a foam shockproof layer.

  • Page 27: Quality Assurance

    XII. Quality Assurance (1) This instrument is manufactured in strict accordance with national standards and corporate standards, and each instrument has undergone strict factory inspection. (2) This instrument enjoys a warranty of one year. During this period, if quality is lower than the characteristic requirements due to manufacturing reasons, the company will provide repair for free.

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