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How Does PAT Testing Work?
The earth continuity test allows for verification of the connectivity between any exposed metal parts and the protective earth pin in the mains plug of a class 1 appliance. This involves connecting the item of electrical equipment to the PAT tester, and the test probe to exposed metal parts. A current is then transferred from the PAT tester along a mains cord to the enclosure. This current then flows back to the PAT tester via the protective earth conductor. This will result in the display of the protective earth path resistance.
The measurement of a predictive conductor current will require the connection of the appliance to the PAT tester. The powering of the appliance will result in a current flowing along the mains supply via live and neutral conductors. The live and neutral currents will ideally be neutral. However, the PAT may highlight an imbalance between the live and neutral currents in some instances.
Do I need to do PAT testing?
The Health & Safety Executive (HSE) advises that PAT testing should include three steps – user checks, a formal visual inspection and the manual PAT test using a portable appliance tester.
Step 1 - user checks
All users of electrical equipment should have some basic training in how to use the equipment safely, as well as what danger signs to be aware of, as part of their induction. Users should feel confident in visually checking the equipment regularly for obvious signs of damage, as well as potential risks, such as cables trapped under desks or water hazards.
Step 2 - a formal visual inspection
Prior to the manual PAT test, a formal visual inspection of the equipment should be carried out. According to the HSE, this process usually flags up around 90% of problems and it can be carried out by a competent member of staff with the relevant training, or a professional.
It is essential that the equipment is turned off and unplugged before beginning the visual inspection. The checklist should include:
1)The plug
-Look for any signs of damage, including cracks, burns or bent pins, and check that the wiring is correct. The live, neutral and earth conductors should all be connected to their relevant terminals tightly.
3)The appliance
-Check for any obvious damage, including cracks, burns, corrosion and casing wear and tear
4)The mains socket
-Although this is not part of a PAT test, it should be included in the visual inspection. The mains testing of sockets is done during a fixed wire test.
-Look for cracks, signs of over-heating and any loose fittings and check the shutter mechanism
5)RCD (Residual Current Device) checks
-RCDs are fitted with a test button and will trip if the current flowing through the live conductor is different to that in the neutral
-The inspection should look for signs of damage, check the operating current and test the ‘test’ button to ensure it’s in working order
What are the Different Types of PAT Testers?
PAT testing equipment has various levels of functionality. Basic PASS/FAIL kits are very easy to use and relatively inexpensive. They are the preferred choice for a range of businesses, clearly indicating whether an item of electrical equipment has passed or failed. Mains-powered testers require connection to an electrical supply. However, the self-contained battery versions are ideal for large workplaces due to their portability and ease of use. They commonly feature basic light systems that indicate whether electrical items have passed or failed the test.
Basic PAT testing equipment also allows for the establishment of:
- Earth continuity
- Insulation resistance
- Polarity
Basic PAT testers don't display the complete set of electrical test results, and neither do they allow for test configuration or data storage. However, they are often the best choice for obtaining electrical test results quickly and easily.
Advanced PAT testing kits offer the following types of functionality:
- Portable RCD lead testing
- Adjustable PASS test limits
- Substitute and mains powered leakage testing
- Fuse testing
- Lead polarity testing
While a 500V insulation test voltage is typical and suitable for a number of appliances, many PAT testers now include the option of a 250V insulation resistance test. This is essential for testing sensitive and surge-protected equipment, such as IT hardware.
Advanced PAT testing kits are suitable for users with a high level of technical knowledge and expertise. These advanced systems are particularly well suited to facilities management, as they allow for the recording of the location and test status of equipment and appliances. Some of these systems can also transfer the test results to computers for digital interpretation. Test records can be maintained with PAT software.
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Dodanych produktów: 35
Napisanych recenzji: 287
4 / 5
4 lutego 2022, o 16:02
Nie wie, czy kupi ponownie
Używa produktu od: kilka miesięcy
Wykorzystała: jedno opakowanie
Kupiony w: Inna drogeria
Dobry
Krem dobrze nawilża okolice oczu, jednak jakiegoś innego efektu nie zauważyłam po zużyciu całego opakowania. Zostawia białe mazy na skórze, trzeba dobrze go wklepać. Duży plus za naturalny skład. Opakowanie jest bardzo duże, bo aż 30ml i fajnie, że mamy pompkę i nie trzeba grzebać palcem w pojemniku, ale ta pompa doprowadzała mnie do szału. Po każdym użyciu (używałam rano i wieczorem) krem zasychał i potem wystrzeliwał na wszystkie strony tylko nie na palec po naciśnięciu pompki. No za każdym jednym razem to samo. Nie wiem czy kupię ponownie, bo krem jest dobry, ale za tą cenę mogę kupić znacznie tańszy krem do oczu, szczególnie że ten tylko nawilżają skórę i nic więcej nie robił.
ZALETY: + duże opakowanie,
+ brak mocnego zapachu,
+ naturalny skład,
+ działanie nawilżające.
WADY: - brak innych efektów, które zapewniał producent,
- wysoka cena.
Dodanych produktów: 0
Napisanych recenzji: 11
5 / 5 HIT!
28 listopada 2021, o 19:46
Używa produktu od: rok lub dłużej
Wykorzystała: kilka opakowań
Kupiony w: Nie podano
Bardzo dobry
Krem jest lekki, szybko się wchłania, nie zawiera nuty zapachowej. Bardzo dobrze poradził sobie z moimi sińcami i cieniami. Duży plus za pojemność (30 ml) i higieniczne nabieranie kremu. Starcza mi na długo, a skóra wokół oczu jest bardzo odświeżona.
What does a pat test consist of?
A regular PAT testing includes a visual inspection and electrical testing of an electrical device, which will comprise the following:
- Checking for power cords or cables that are not correctly connected to their plugs
- Powering down and unplugging devices before testing them
- Testing all removable parts such as batteries or memory modules ensures they work and have no issues that could cause fire hazards. If there’s any damage to these areas, then you should consider replacing the whole unit rather than just repairing it because breakages can happen in the future, and you’ll have to start again.
- Check for any defects or signs of wear that may be dangerous – such as frayed wires
- It is not just the device you need to check but the surrounding area as well – so if a cord is hanging over or near something flammable, then that could also be an issue.
