Huazheng HZJZ-III Arrester Monitor Calibrator Instruction Manual
- June 12, 2024
- Huazheng
Table of Contents
Huazheng HZJZ-III Arrester Monitor Calibrator
Product Information
The HZJZ-III Arrester Monitor Calibrator is a product manufactured by Huazheng Electric Manufacturing (Baoding) Co., Ltd. It is designed to make your work easier and more enjoyable by providing office automation in test and analysis work. This instrument has the operating characteristic of completing the test automatically with just a light press. The function of the arrester discharge counter has evolved to not only record the number of lightning strikes but also monitor the leakage current of the arrester online. The HZJZ-III Arrester Monitor Calibrator is a newly developed instrument that serves as both an impact test and ammeter calibration device.
Product Usage Instructions
The impact test function allows you to assess the arrester’s ability to withstand an impulse current. Follow the steps below to perform the impact test:
- Ensure the power supply is turned on and connected to the instrument.
- Connect the test line and ground lead according to the provided wiring diagram.
- Press the impact test button to initiate the test.
- Observe the output voltage. If it does not drop, turn off the power supply.
- Wait for the voltage indicator to return to zero.
- Check for any circuit breaks or ensure that the discharge counter is suitable for the specified model.
Technical Parameters
- Input voltage: AC220V±10% 50Hz; DC12V
- Impulse voltage: 0-1600V Accuracy: 2%±5V (Higher voltage can be customized)
- Impulse current: >100A (8/20μS square wave)
- Calibration current: 0-10mA, ±2%±3 words
- Instrument power consumption: ＜30VA
- Appearance size: 320×240×150mm
Panel
Impact Test
Test principle
Figure 1 Principle wiring of JS type action counter (a) JS type; (b) JS8 type
R1, R2 non-linear resistance; C energy storage capacitor L counter coil; D1~4
silicon diode\
Figure 1 shows the principle wiring diagram of the JS type action counter.
Figure 1 (a) shows the basic structure of the JS type action counter, the so-
called double valve plate structure. When the arrester is activated, the
discharge current flows through the valve plate R1, and the voltage drop on R1
charges the capacitor C through the valve plate R2, and then C discharges the
inductance coil L of the electromagnetic counter to make it rotate by 1 grid.
1 times. Changing the resistance of R1 and R2 can make the counter have
different sensitivity. Generally, the minimum operating current is an impulse
current of 100A (8/20μs). Because there is a certain voltage drop on R1, the
residual voltage of the arrester will increase, so it is mainly used for high-
voltage arresters above 40kV. Figure 1(b) shows the structure of the JS-8
action counter, which is a rectifier structure. When the arrester operates,
the voltage drop on the high-temperature valve plate R1 is fully-wave
rectified to charge the capacitor C, and then C discharges the L of the
electromagnetic counter to make it count. The resistance value of the valve
plate R1 of this counter is small (the pressure drop at 10kA is 1.1kV), the
current capacity is large (1200A square wave), and the minimum operating
current is also 100A (8/20μs) impulse current . JS-8 type counter can be used
for 6.0 ～ 330kV system lightning arrester, JS-8A type counter can be used for
500kV system lightning arrester.
Inspection method of the action and Principle of the counter detector
Due to poor sealing, moisture or moisture may enter the action counter
during operation, which will rust the internal components and cause the
counter to not operate normally. Therefore, the “Regulations” stipulates that
it should be inspected once a year. The methods to check the operation of the
counter on site include capacitor discharge current branch, AC method and
standard impulse current method. Research shows that the standard impulse
current method is the most reliable, and its principle wiring is shown in
Figure 2. The 8/20μs, 100A impulse current wave generated by the impulse
current generator is applied to the action counter. If the counter operates
normally, the instrument is in good condition, otherwise it should be
disassembled and repaired. For example, a certain electric power bureau used
this method to detect 27 counters, of which 3 did not move, and the
disassembly found that the internal components were damp and damaged. The
“Regulations” stipulate that the continuous test should be performed 3 to 5
times, and thenormal action should be performed each time, and the time
interval between each time should not be less than 30s. The recorder should be
adjusted to 0 after the test.
Figure 2 Principle wiring of standard impulse current detection method
(The dashed box is the impulse current generator)
- C-charging capacitor
- JR-charging resistance
- L-damping inductance
- D-silicon rectifier diode r-shunt;
- B-test transformer;
- V electrostatic voltmeter
- CRO high voltage oscilloscope
Operation Method
- Connect the output end of the instrument to the two ends of the arrester counter (the connecting wire should be as short as possible), the red end is connected to the upper end, and the black end is grounded.
- After connecting the power cord, check whether the instrument and wiring are correct, and then start the test after confirming that it is correct.
- Turn on the power switch (the power light is on), and after the meter is charged to 600V or more, you can start the calibration.
- Press the impact test button, the output voltage will drop immediately, at this time you can observe the action of the counter Condition.
- If multiple tests are required, when the output voltage reaches 600V or more, press the impact test button again and observe the action of the counter.
- After the inspection is completed, immediately turn off the power supply, and then remove the wiring when the output voltage has completely returned to zero.
- If you press the impact test button and the output voltage does not drop, you should turn off the power supply. After the voltage indicator returns to zero, check whether the circuit has a break or the discharge counter is not suitable for the model specified in the technical indicators.
Ammeter Calibration
When the instrument is turned off, the wiring method forms a loop like the
impact test. After connecting the wire, press the current-voltage switch
before it can be turned on! At this time, the instrument is in the current
output state. During calibration, adjust the current adjustment potentiometer
and compare the indicator on the dial of the instrument with the display on
the dial of the sample to determine whether the current indicator of the
sample is correct or not!
Suggestion: Perform rough calibration first, compare the accuracy of the
large scale, and then adjust the current to within 2mA, perform accurate
calibration, and determine the reliability of the test product!
Precautions
- When removing the wiring, if the output voltage does not return to zero, the operator cannot touch the non-insulated part of the test wire to avoid personal accidents.
- During current calibration, the test product cannot be operated with electricity.
- After the instrument has used the DC power supply test, the battery in the instrument should be charged and maintained in time.
- During the DC test, if the undervoltage indicator is on, stop using the DC power supply and switch to the AC power supply for testing.
- When the instrument is not used for a long time, the battery pack in the instrument should be charged and maintained regularly (two months). Generally, charge for about 14 hours until the “full” indicator lights up.
Packing List
| NO. | Name | Quantity |
|---|
1
| Test line| Red| 1
Black| 1
2| Ground lead| 1
3| Power Cable| 1
4| Fuse| 2
Dear user:
Thank you for choosing HZJZ-III Arrester Monitor Calibrator. We hope that this
instrument can make your work easier and more enjoyable so that you can get
the feeling of office automation in the test and analysis work. Before using
the instrument, please read this manual, and operate and maintain the
instrument according to the manual to prolong its service life. “Just a light
press, the test will be completed automatically” is the operating
characteristic of this instrument. If you are satisfied with this instrument,
please tell your colleagues; if you are not satisfied with this instrument,
please call (0312) 6775656 to tell you to serve you at all times-Baoding
Huazheng Electric Manufacturing Co., Ltd., our company will definitely make
you satisfied! With the continuous development of science and technology, the
function of the arrester discharge counter is not only used to record the
number of lightning strikes but also to monitor the leakage current of the
arrester online. Our newly developed lightning arrester online monitor
calibrator is an instrument with both impact test and ammeter calibration.
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