SUBSTITUTE LEAKAGE TEST
For Class 2 appliances, the Earth Bond Test clip can be used for an earth
return lead.
For appliances which incorporate over-voltage protection, a 250V DC test
voltage is provided to allow a reading to be taken without the protection
devices generating a false failure.
Substitute Leakage Test
The substitute leakage test applies a nominal voltage of 40V AC RMS to the
appliance and is applied between the earth pin and both the live and neutral
pins of the supply plug. For Class II appliances, connect the Earth Bond
test clip to the appliance as a substitute for the Earth.
The Tester measures the current that flows and scales the result to display
a guide to the current that would flow if the test voltage had been the
nominal mains supply voltage, scaled for the applicable socket.
Please note that values for Substitute Leakage may differ substantially from
that of conventional Earth Leakage tests because of the way that the test
is performed (e.g. it will be affected by the presence of Neutral-to-Earth
suppression capacitors).
This test can prove useful in situations where neither conventional Insulation
nor Flash tests are acceptable methods of testing the insulation of the
appliance.
IEC Lead Test
This test confirms the electrical safety of 230V IEC leads.
The IEC test performs a continuity and polarity check on the Live and
Neutral conductors and confirming that there are no breaks or cross wiring
in these conductors.
POWERED TESTS
Powered Tests
Warning
Mains voltage applied to appliance
The following powered tests differ from the previous tests in that they apply
mains supply voltage to the appliance to perform their functions:-
Leakage Test•
Touch Leakage Test•
Load Test•
The Tester performs an initial low voltage test to establish that the appliance
can be safely powered.
Warning
It is important that the user verifies that an appliance with moving
parts (e.g. an electric drill) is safely mounted to allow movement
without causing damage to equipment or personnel.
If the potential load current is too high, a warning message appears,
allowing the user to continue. If a Live to Neutral short exists, this message
will appear, and if tests are continued the fuses will blow. If the potential
load current is low, a warning message appears to allow the user to check
that the appliance is switched on, and all fuses are intact. The Tester also
performs a safety test to verify that internal relays are properly set before
applying full mains supply to the appliance.
Power to the appliance will remain until the Red Button is pressed. This
allows the user to switch between the three powered tests without removing
power from the appliance.
SUBSTITUTE LEAKAGE TEST
POWERED TESTS
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