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CES4PAR(4Lang)Eng.fm Page 11 Tuesday, August 31, 1999 2:35 PM
Portable appliance test (PAT) guidelines
What is PAT?
The Portable Appliance Test is a set of tests that must be administered
to electrical equipment in the UK and some locations in Europe to
ensure safety.
The tests are typically carried out using a small PAT device. The PAT
device connects to a power source and then attaches to the product
via an electrical outlet and test probes. The PAT provides a simple pass
or fail result, allowing rapid testing of large inventories.
The following guidelines provide instructions for applying the PAT to
the Source Four PAR.
Testing New Luminaires
Source Four PAR luminaires now include a specific PAT point where
the test clip is attached, as shown in the figure below. The PAT test is
comprised of two tests: the ground test and the insulation test.
Ground Test
The ground test indicates the safety of the ground connection to the
burner unit and reflector-housing parts. The connection could become
live if the insulation failed. It is not necessary to test continuity to
either the lens tube or the yoke, as these are separated by metallic
shields.
Follow the steps below to ground test a Source Four PAR luminaire.
1. Plug the luminaire into the PAT outlet and attach the test clip to the
PAT point on the luminaire.
2. Set the PAT device to test at 10 amperes and press the GO/TEST
button.
If your PAT device doesn't allow you to change the amperage, it can
still be used for the test. However, the earth tether, which connects
the burner assembly to the body of the unit, may get hot enough to
cause injury and could become permanently discoloured. This is
normal for test currents above approximately 20 amperes.
The PAT device should read less than 0.5 ohms. Most Source Fours
give a reading of less than 0.1 ohms, if in good condition.
English
Reflector housing
side view
PAT point
Reflector housing
rear view
Figure 7
CE Source FourPAR • 11
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