Related Manuals for Huazheng Electric Manufacturing HZ-20AS
Summary of Contents for Huazheng Electric Manufacturing HZ-20AS
- Page 1 HZ-20AS Portable Lighting Arrester Tester USER MANUAL Huazheng Electric Manufacturing(Baoding) Co.,Ltd...
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Page 2: Table Of Contents
Contents I.IMportant............................1 2.Overview............................2 3.Functions And Fearutres......................2 4.Technical Index..........................3 5.Measurement And Compensation Principle................4 6.Functions Of Panel Aand Components..................6 7.Operating Instructions........................9 8. Test Wiring..........................19 9.After-sales Service........................21... -
Page 3: I.important
I.Important 1. If the instrument is not in use, please turn off the power in time! 2. The rechargeable battery, as consumable part, ought to be well maintained. The effective capacity of rechargeable battery will fall gradually with time passing when the instrument is in use, which shortens the effective time of use. -
Page 4: Overview
2.Overview Zinc Oxide Arrester Comprehensive Tester is used to check the electrical performances of the zinc oxide arrester (MOA).The instrument is suitable for on-site inspection of zinc oxide arrester at all voltage levels, as well as the factory test and acceptance test in the library when power is failed.By measuring the full current and resistive current and other parameters,it can be found that it is possible to detect the dangerous defects such as the internal insulation of the zinc oxide arrester and the aging of the valve. -
Page 5: Technical Index
3.9 Voltage collector integrated local display (128 × 64 dot matrix OLED LCD screen) and phase sequence checking function can display three-phase full voltage, voltage fundamental wave, three, five and seven times harmonic RMS, system frequency values and three-phase voltage phase difference. -
Page 6: Measurement And Compensation Principle
4.2.3 fundamental wave measurement accuracy of resistive current: ± (reading × 5% + 5uA) 4.2.4 Current harmonics measurement accuracy: ± (reading × 10% + 10uA) 4.2.5 Current channel input resistance: ≤ 2Ω 4.3 Electric-field Intensity Measurement 4.3.1 input range of electric field strength: 30kV/m～300kV/m 4.3.2 accuracy of electric field intensity measurement:±... - Page 7 fundamental reference voltage The formula: Fig.1 projection Ir1p = Ix1p·CosΦ Ic1p = Ix1p·SinΦ The full current of zinc oxide arrester contains high harmonics both generated by the non-linearity of the zinc oxide arrester and by the bus voltage harmonic.Compared with Irp, Ir1p is more stable and real, so Ir1p is suggested to be the resistance current index.
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Page 8: Functions Of Panel Aand Components
original data without automatic compensation, (namely the compensation angle is 0°), and assess the trend of change. 6.Functions Of Panel Aand Components 6.1 Host Panel Diagram And Interface Board Diagram Host panel diagram and interface board diagram are shown in figure 3. 6.1.1 Current input: Phase A, B and C are three input channels, when measured in single phase, currents of phase A, B, and C are channeled from A. - Page 9 1：Current input；1： RS485A； 2：Earth； 2：RS485B； 3：NC. 3：Inductive voltage input； 4: Earth. 5.1.3 LCD screen: Industrial grade 640 * 480 dot matrix high brightness color LCD screen, displaying operation menu, test data, waveform and so on. 5.1.4 Keys: Used for operating the instrument. "↑ ↓" refers to"up and down", used to move or modify the data;...
- Page 10 6.2.1 Communication interface: For wired test mode, compatible communication cable is used to connect instrument host reference signal input. 6.2.2 Antenna: When using the wireless test mode, please install the compatible antenna on the antenna seat so that the voltage collector can transmit the wireless signal effectively.Without installing an antenna, the wireless communication distance will be greatly shortened, and the internal wireless module may be burned if the using time is too long.
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Page 11: Operating Instructions
line) and neutral point or ground line (black line). Choose the reference phase for the single phase, and both phase A, B, C, AB, and CB are input from phase A (yellow line) and black line. Note: If the PT secondary side is phase Bearthed, phase A (yellow line) is connected to PT secondary side phase A, the black wire is grounded, and the reference phase of the instrument host selects "A-B";... - Page 12 The external printer is connected to the instrument host with the compatible connection wire. The green indicator on the external printer interface is the power indicator, and the yellow one is the data indicator. After the external printer is connected successfully,the green indicator light on the RS232 interface of the instrument host is on, and the top status bar of the screen displays the icon of the printer.
- Page 13 The "main menu" screen is shown in figure 7. The top status bar shows the current date, time, the insert status of the U disk, the connection status of the external printer, the test mode (and corresponding additional information), and the battery power of the instrument host. The bottom displays software version number, hardware version number and device number.
- Page 14 Fig.8 Test parameter setting ● Test ID : Set the current test number. ● Device ID: The number of the device being tested, which cannot be set. ● Test Mode: The test mode can be wired, wireless and induction. When choosing wireless test mode, the number at the right of the word "wireless"...
- Page 15 reference phase is single phase, and it is different from the tested phase, the instrument automatically sets up the theoretical compensation angle, as shown in the table below. Tested Tested Tested Phase A Phase B Phase C Reference Phase ABC 0°...
- Page 16 start the test process and enter the test data display screen. In addition, the instrument will save this parameter settings for the next time to use. 7.3.3 Test Data Display Screen Test data display screen is divided into the following five ones: main test data, detailed test data, harmonic test data, waveform test data and parameter settings view.
- Page 17 ● This symbol is displayed during the test and blinks. ● This symbol is displayed when the test is paused and blinks. Click the "Test" key to enter the test state; click "Pause" key to enter the pause state; Under the test state, the instrument can only switch the display screen, but cannot save data, print,upload and perform other functions.
- Page 18 ● Ic1p: peak of fundamental wave capacitive current. ● Ir3p, Ir5p, Ir7p: peak of 3, 5, 7 harmonic resistance current. Note:If the Angle Φ of advanced fundamental voltage of the fundamental wave current exceeds 90°, Ir1p is negative; when the angle is more than 180°, Ic1p is also negative. If the Ix waveform is flat, Ic1p can be greater than Ixp.
- Page 19 7.3.5 Test Record Query Fig. 14 Test record query Fig. 15 Real-time clock setting The test record query screen is shown in figure 14. All the test records,the test data, waveforms and corresponding parameter settings stored in the instrument can be viewed in the screen.The saved test records in the instrument can be transferred to the U diskor printed.
- Page 20 ● Battery power of voltage collector. ● System frequency tested by the phase A. ● Voltage collector transmission mode: is the wireless transmission mode (the value shown above is the symbol of the wireless communication channel), and is the cable transmission mode. Press "→" key to switch mode.
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Page 21: Test Wiring
with cable communication cable, and set the instrument host as cable test mode, after the success of communication, wireless communication channel of instrument host will automatically set to the channelvalue consistent with that of voltage collector. Then the test can be conducted under the wireless test mode. 8. - Page 22 example: on the PT terminal box), which can prolong the distance of wireless transmission and reception. When the wireless signal is weak, the antenna direction can be adjusted appropriately to enhance the wireless signal. A suction antenna with extension cord can be used to improve the quality of the wireless signal under special circumstances.
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Page 23: After-Sales Service
Fig. 19 wiring diagram of wireless test mode (simultaneous measurement of three-phase) 8.4 Wiring Instructions Of Induction Test Mode The voltage collector is unnecessary to the induction test mode, the current sampling and the induction electric field sampling can be completed by the host. The induction plate should be placed on the base of phase B arrester, and the position should be symmetric with the arrester of phase A and C, and the sensor plate is perpendicular to the arrester of phase B. - Page 24 After the warranty period, maintenance and commissioning will charge the appropriate fees. 9.3 Batteries are consumable products and are not covered under warranty. 9.4 One of the following conditions is not subject to warranty: 9.4.1 The user disassembles the instrument or alters the technological structure of the instrument. 9.4.2 Serious damage to the instrument due to user custody or improper use.
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