Common problems of pressure tester
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2017-12-25
What are the tests for stress tests?
A lot of people are familiar with it, using a continuity test.
Continuity test check "good connections."
You do a continuity test and see if the current flows from one point to the other.
If current flow
It's easy enough to connect.
Many people are not familiar with the pressure test.
"Withstand pressure" is high potential (high voltage).
A stress test check "good isolation."
You did a stress test to make sure there was no current
Take the flow from one point to another.
Stress tests are in some ways the opposite of continuous testing.
Continuity test: "make sure the current flows and it's easy to get from one point to the next."
Stress test: "make sure the current does not flow from one point to another (the voltage is very high to ensure that the current is not current)."
In a simple case, a conductor requiring two compressive tests should be isolated and applied to a very high voltage between the conductors.
Watch the current flowing.
Ideally, there's not a lot of current going on.
If the current is too large, the points are not well separated and they should be tested for failure.
Why the high pressure test?
You can use a stress test to ensure that you have a good partial circuit separation.
Good isolation helps ensure the safety and quality of the circuit.
Pressure testing will help identify gaps or crush heat preservation, the stray strands or braided shielding, conductivity or corrosive pollutants around the conductor, terminal spacing, in IDC cable and error tolerance.
All these conditions may lead to failure of mobile devices.
What is the high voltage test?
There are three common high voltage tests.
Dielectric breakdown test
Insulation resistance test
Insulation resistance test
What is "breakdown test?"
Breakdown test you try to answer the question: "how many voltage wires can I apply to fail?"
Increase the voltage until the current suddenly increases.
You are looking for the maximum voltage of the cable to stand in front of it to fail.
Once the cable breaks down, it is usually damaged or destroyed.
What is "insulation resistance test" (DW)?
Insulation resistance test you try to answer the question: "what time does this cable take to withstand the required voltage?"
The amount of time the voltage is applied and the current flowing through it.
Ideally,
No current flows through the cable without being harmed.
What is the insulation resistance test (IR)?
In your attempt to answer the question: "is it a high enough insulation resistance test?"
You apply the voltage and measure the current very carefully.
Then, you can use ohm's law (R = V/I).
Calculated insulation resistance.
How do these stress tests affect quality?
With all of these test tools, you can use it to better understand how the cable will perform and monitor any changes in the cable performance.
Dielectric breakdown testing is used in product design and certification.
It helps build the maximum voltage design.
It can also be used on the basis of random samples to verify that the maximum voltage does not change.
Dielectric breakdown tests may require components that are used in key applications during the development process.
Many test specifications require pressure testing for each cable production.
The test is typically a typical breakdown voltage of around 75%.
It's a safety net.
The test is a sensitive arc or corona,
Therefore, it will often find the problem of the terminal spacing, the problem of the mold, the tolerance error of the IDC cable, or any problem, may generate an arc.
This test will not significantly reduce the cable.
Insulation resistance testing is usually in each test cable.
It is usually between 300 and 500 Vdc, with a resistance of 100 to 500 Megahoms.
The test is a very sensitive one and is contaminated during assembly.
Flux, oil, remover, and skin oil may cause problems.
It is good at identifying the presence of moisture in insulation and will conduct this test.
Do this test cable with each one that will allow you to be in the manufacturing process
Detect changes in pollution.
Additional resources for high voltage testing:
Ac pressure test
Direct voltage insulation defect detection
High voltage arc distance.
All the high voltage that is being used, am I safe?
In a pressure-resistant test, you may be at a certain risk of reducing the risk of use is safe by using the tester, according to the manufacturer's specifications.
Products that are being designed today usually must comply with product safety regulations.
Some of these regulations work to reduce the chances of receiving harmful electric shocks.
Modern devices are more likely to follow these rules.
When it comes to pressure-resistant, electrical and voltage, you should choose the most "safe" machine, which will test the cable.
In order to minimize the risk of electric shock injury, make sure that your compressive equipment follows the following guidelines:
In the general manager of concussion, you can receive not more than 45 UC.
The total energy should not exceed 350 megajoules.
Total current should not exceed 5 mA peak (3.5 mA effective value)
The fault current should not stay longer than 10 milliseconds.
If the tester does not meet these requirements, then ensure that it has a secure interlocking system, ensuring that you can not contact the line, and that it is being tested for stress.
These guidelines were derived from the test standard, en61010-1, April 1993, cenon measurement, control and laboratory safety requirements for electrical equipment.
Over the past decade, many safety regulations have been unified (standardized) and en61010-1 are similar to UL 61010a-1 (original ul3101-1).
There are a few things you can do when you're testing a cable to reduce your risk, or even more:
Verify the correct operation of the equipment in the safety circuit.
1. Follow the instructions and safety guidelines of all manufacturers.
2. Do not touch the cable withstand test.
3. Be allowed to take out the cable withstand voltage test.
4. Wear insulating gloves.
5. If you have any health conditions, you can be more frightened and then not use the equipment.
6. Don't let children use equipment.
7. If you have any electronic implants, don't use equipment.
Where is the high voltage applied?
To understand how to withstand stress tests, you need to understand where the high voltage power is connected.
The pressure tester is usually connected to one side of the supply safety grounding (ground line).
The other side of the supply is connected to the hipoted conductor.
Such a power connection can connect to a given conductor in two places: high voltage or grounding.
When you have two or more contact resistance tests you connect one to the high voltage and connect all the other contacts to the ground.
Exposure to testing in this way ensures that it is isolated from all other contacts.
What happens when you test something more complex than when you just touched it?
A series of contacts with wires, resistors, capacitors, diodes, and other components is called a "network"
Connect (or "net").
The contact in the net of pressure test net connects all the high voltage and all the other contacts in the connection device to the ground.
For example, if you have a wire connecting two pins, high voltage will
It also applies to these pin voltages to improve the entire line.
All other electrical wiring and marketing are held.
If you have two pins connected to a resistor, voltage, voltage on both ends of the resistor both pins are raised
Always zero.
The whole resistor, the voltage is increased.
In short, a component of all pins, the same voltage is seen at any time.
The voltage is applied in this manner to ensure the rest of the device
The component's body is partially isolated.
Where is the measured current?
In the stress test, the high voltage power of the flowing current is measured.
What causes the current to flow through the insulator?
Insulation "no guide."
But if you use enough voltage, even the best insulation will allow some current to flow through.
You might wonder why the current flow?
There are several reasons for the current to flow through insulation resistance testing.
Resistance, capacitance, arc, electrochemical effect, and corona effect, describe current flow.
All these effects add up to one
Test results of stress test.
