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General Description
Introduction
Megger PAT 32 series are designed to check the
electrical safety of any product fitted with an appropriate
mains plug, including information technology (IT)
equipment, domestic appliances, industrial appliances
and power tools.
The following tests are available:
•
Circuit check
•
Fuse check
•
Earth Continuity test
•
10 Amp Earth Bond test
•
25 Amp Earth Bond test
•
Insulation test
•
Extension lead tests (ELT1 or ELT2
required)
-
Polarity (UK only)
-
Earth Bond
-
Insulation
Tests are effected by plugging the portable appliance or
extension lead into the relevant socket and pressing the
relevant Test switch. The readings from each test are
shown on the unique analogue / digital liquid crystal
display. The measurement scale for Earth Bond is
marked with pass bands. This provides a rapid indication
of a test Pass or Failure and allows proper test results to
be kept.
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Applications
Appliances and electrical equipment with Safety Class I,
Class II and Safety Class III insulation may be tested.
These classes of safety are defined in various IEC and
BS safety specifications, and in general are:-
Class I
Appliances which have functional
insulation throughout and an
earth connected body i.e. an 'Earthed'
appliance.
Class II
Appliances which have both functional
and additional insulation, and where
any metal parts cannot become 'Live'
under fault conditions. This is 'Double
Insulation' indicated by
Class I / II
Appliances having part of the
enclosure which meets Class I
requirements and part which meets
Class II.
Class III
Appliance where protection against
electric shock is provided by an SELV
supply. Class III construction is
indicated by the
III
.
mark.