Seaward B255 User Manual
Page 28
Operating Manual
Clare B255 Power Tool & Appliance Test Station
24
Earth Leakage Test (Class 1 Earthed/Grounded Products)
This test is intended as an alternative to the relevant Flash Test for equipment
fitted with contactor, relay or low voltage ‘electronic’ start switching devices
(often referred to as ‘dead mans handles’), i.e. typically those products that
require the mains voltage to be present BEFORE any function switches can
operate.
Set the Test Selector to the Earth Leakage position and then depress & hold
the LOAD TEST button.
Now operate the product function switch(es) for normal running - the Earth
Leakage current will be displayed on the 0-5mA (lower) scale of the meter.
The leakage value must fall within the appliance manufacturer’s specifications
or conform to other relevant standards – typical values are shown in the chart
opposite.
Release product switches and the LOAD TEST button as soon as a reading
has been taken.
During the following test, the equipment being measured will
be in it’s normal operating state. Power tools and rotating
machinery must be made safe BEFORE starting the test –
ensure that portable equipment is properly secure and that
any moving parts are adequately guarded to prevent damage
or injury.