Avtron K126 4 Kilovolt AC Hipot
Avtron K126 4 Kilovolt AC
Hipot
Rent me for $125 a
month
The Avtron
K126 4 Kilovolt Hipot Tester is a low cost and high value solution.
Perfect for production line hipot testing the Avtron K126 is a rack
mountable and provides a up to 4000 AC volts.
Under normal conditions, any electrical device will
produce a minimal amount of leakage current due to the voltages and
internal capacitance present within the product. Yet due to design
flaws or other factors, the insulation in a product can break down,
resulting in excessive leakage current flow. This failure condition
can cause shock or death to anyone that comes into contact with the
faulty product.
A Hipot test (also called a Dielectric Withstand
test) verifies that the insulation of a product or component is
sufficient to protect the operator from electrical shock. In a
typical Hipot test, high voltage is applied between a product's
current-carrying conductors and its metallic chassis. The resulting
current that flows through the insulation, known as leakage
current, is monitored by the hipot tester. The theory behind the
test is that if a deliberate over-application of test voltage does
not cause the insulation to break down, the product will be safe to
use under normal operating conditionshence the name, Dielectric
Withstand test.
In addition to over-stressing the insulation, the
test can also be performed to detect material and workmanship
defects, most importantly small gap spacings between
current-carrying conductors and earth ground. When a product is
operated under normal conditions, environmental factors such as
humidity, dirt, vibration, shock and contaminants can close these
small gaps and allow current to flow. This condition can create a
shock hazard if the defects are not corrected at the factory. No
other test can uncover this type of defect as well as the
Dielectric Withstand test.
Two types of Hipot tests are commonly used. These three
tests differ in the amount of voltage applied and the amount (or
nature) of acceptable current flow:
Dielectric breakdown Test
The test voltage is increased until the dielectric
fails, or breaks down, allowing too much current to flow. The
dielectric is often destroyed by this test so this test is used on
a random sample basis. This test allows designers to estimate the
breakdown voltage of a product's design.
Dielectric Withstand Test
A standard test voltage is applied (below the
established Breakdown Voltage) and the resulting leakage current is
monitored. The leakage current must be below a preset limit or the
test is considered to have failed. This test is non-destructive and
is usually required by safety agencies to be performed as a 100%
production line test on all products before they leave the
factory.
US-Instrument.com
