Three methods for detecting fault arc detectors
The fault arc detector monitors and alarms the fault arc or electrical equipment faults caused by fire, personal electric shock, system fault, L/N line to ground, L to N lines, etc. caused by the low voltage distribution system (400V). A fault arc generates an electric spark that directly ignites an object and then creates a fire. The following describes the three detection methods for the fault arc detector :
1, through the current detection
The simplest way to detect an arc in a fault arc detector is to judge the current amplitude and the slope of the current waveform when the arc occurs. However, this kind of judgment based on the time domain only has a certain degree of limitations, which may result in mistakes in judgment.
2. Detection through frequency domain analysis signals
Analyzing and judging the signal of the current heart voltage through the frequency domain angle, this analysis method is simpler and more convenient than the time domain analysis, and it is more intuitive on the physical performance. The judgment of the fault arc will also be more accurate. However, if the frequency of the signal and the frequency of the sampling are not the same, there will be spectral leakage and the effect of the barrier, so that the calculated results will lose accuracy, thus affecting the detection of the arc.
3, detection through wavelet changes
Wavelet transforms can also produce good local variations for both the time domain and the frequency domain. And there is good adaptability to the signal. So that most of the signals can be extracted from the original data. This method mainly uses the analysis of the current signal of the fault arc in the wavelet transform. It can not only reflect the sudden change in the current signal, but also the size of the mutation. Through the research and analysis of these information, the accuracy of the arc can be further increased.



Concrete Pile Pre-stressed/Tension Machine:

Tension Machine is a kind of feedthrough pre-tensioing. It is also called Spun Pile tension jack machine, Pole Tension Machine, prestressed tension machine etc. It is the neccesary equipment to produce Pre-stressed Concrete Spun Pile and prestressed concrete pole products. As the end of the tension rod is connected to the anchor with thread, it can be applied to various forged anchors, chilled iron anchor used for stayed-cable bridge and other similar anchors, as well as pre-tension pulling for pipes. In accordance with actual requirement.


Spun Pile Tension machine

HH Tension Machine's advantages:

1. The large-screen LCD display.

2. Double control mechanism of touch screen and keyboard, high reliability.

3. Directly work after the input of tensioning data, and the oil cylinder will automatically complete the tensioning process to reduce uncertain factor of manual operations and improve the tensile quality.

4. Built-in SD card function, which can save the tensile data to the computer regularly, and check the record at any time.

5. With its own printer, it can print tensile data in working time, avoiding the tedious and unstable manual record and ensuring the traceability of tensegrity data is verified.

Prestress Tension jack machine

 

Technical Parameter:

1. Oil pump flow: 12L/min

2. Motor power: 7.5kw

3. Rated power: 31.5Kpa

4.Tension force: 2000KN

5. Tension stroke: 200mm

6. Programmable controller of automatic control system + input and output of analog data Color touch screen, USB interface output

7. Control voltage: 380V+24V

8. Accuracy of prestress control:±0.1Mpa

9. Data transmission rate is 100%

Main configuration:

Automatic tension control system, 300T jack, oil pump, lifting trolley, tensioning rod, tensioning head and supporting foot.

 

If you have any questions, please contact with us. Welcome you can visit our Factory.For inqury,Please send mail directly to us.



Concrete Pile Pre-stressed/Tension Machine

Concrete Pile Foundation,Concrete Pile Tension Machine,Presressed Tension Machine,Pile Tension Jack Jig

Jiangsu Haiheng Building-Materials Machinery Co.,Ltd , https://www.jshaiheng.com

January 19, 2020