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The instrument can measure the following parameters and display it digitally:
The capacitance value CX of the tested article is in units of pF or nF, 1 nF = 1000 pF.
The dielectric loss value tgδ of the tested article is shown in %.
Second, the instrument performance characteristics:
1. The instrument uses complex current method to measure capacitance, dielectric loss and other parameters. The test results are accurate and easy to implement automated measurements.
2. The instrument adopts frequency conversion technology to eliminate 50Hz power frequency interference in the field, and it can measure reliable data even under strong electromagnetic interference environment.
3, the instrument uses a large-screen LCD display, the test process through the Chinese menu prompts are both intuitive and easy to operate.
4, the instrument is easy to operate, the measurement process controlled by the microprocessor, as long as the choice of a good measurement method, the data can be measured under the control of the microprocessor automatically.
5ã€Integrated models, including standard capacitors and high voltage power supply, facilitate field testing and reduce field wiring.
6, the instrument measurement accuracy is high, can meet the oil dielectric loss measurement requirements, so only with a standard oil cup, and a dedicated test line to achieve oil dielectric loss measurement.
7, set up CVT test function, can realize the self-excitation test of CVT, do not need external attachment, only need to measure once, C1, C2 electric capacity and tandem loss measure all.
8. The anti-wiring test adopts the ivddv technology, which eliminates the phenomenon of unstable anti-connection data in the past.
9, with anti-wiring low-voltage shielding function, in the 220kVCVT bus grounding case, the C11 can be disconnected 10kV anti-wire loss measurement 10, with high-voltage dielectric loss measurement function, can use high-voltage transformer or series resonance for more than 10kV voltage Dielectric loss test.
12. The grounding protection function, when the instrument is not grounded or the grounding is bad, the instrument does not enter the normal program and does not output high voltage. Over-current protection function, the instrument will not be damaged when the sample is short-circuited or punctured.
13, electric shock protection function, when the instrument operator accidentally electric shock, the instrument will immediately cut off high pressure, to ensure the safety of test personnel.
Third, the instrument technical indicators:
1. Accuracy: Cx: ± (reading × 1% + 1 pF)
Tgδ: ± (reading × 1% + 0.00040)
2. Anti-interference index: frequency conversion anti-jamming, can still achieve the above-mentioned accuracy under 200% interference 3. Capacity range: Internal high voltage: 3pF~60000pF/10kV60pF~1μF/0.5kV
Application of high pressure: 3pF ~ 1.5μF/10kV60pF ~ 30μF/0.5kV
Resolution: up to 0.001pF, 4 significant digits 4.tgδ Range: unlimited, resolution 0.001%, capacitance, inductance, resistance three kinds of test products automatically identify.
5 test current range: 10μA ~ 1A
6. Internal pressure: set the voltage range: 0.5 ~ 10kV
Maximum output current: 200mA
Lifting pressure mode: continuous smooth adjustment test frequency: 45, 50, 55 single frequency 45/55Hz automatic double frequency precision: ± 0.01Hz
7. Externally applied high voltage: Maximum test current 1A at positive wiring, power frequency or frequency conversion 40-70Hz
Maximum test current 10kV/1A for reverse wiring, power frequency or frequency conversion 40-70Hz
8. CVT self-excitation low-voltage output: output voltage 3 ~ 50V, output current 3 ~ 30A
9. Measurement time: about 40s, related to the measurement method 10. Input power supply: 180V ~ 270VAC, 50Hz ± 1%, mains or generator power supply 11. Computer interface: standard RS232 interface 12. Printer: Weihuang A7 thermal miniature Printer 13. Ambient temperature: -10°C to 50°C
14. Relative humidity: <90%
15. Overall dimensions: 460×360×350mm
16. Instrument weight: 28kg
According to the classification of forging process, closed die forging and open die forging are commonly used. Closed die forging generally keeps the gap between the upper die and the lower die during the forging process, and the material is formed in the closed die cavity around it. Generally, no flash is generated. A small amount of excess material will form longitudinal flying spurs, and the flying spurs can be removed in subsequent steps. Closed die forging improves the dimensional accuracy and surface quality of the product, reduces flash, and improves the utilization of materials.
SCZY mainly produces hot forging products, both closed die forging and open die forging are produced, which can depend on the requirements of the product. Whether it is closed die forging or open die forging, we will fully consider it during mold development to reduce the occurrence of defective products in the production process. Our own internal mold manufacturing, forging production and subsequent secondary CNC machining can cooperate with each other, which can better ensure product quality and production delivery.
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Shenzhen SCZY Technology Co.,Ltd , https://www.szsczycasting.com