BENNING MA 4 measuring adapter
11
6.2. Testing of three-phase devices with alterna-
tive leakage current method
The alternative leakage current measuring method must not be
carried out as an alternative to insulating resistance measure-
ment. DIN VDE 0702 para. 5.7 expressly points out that meas-
uring the alternative leakage current is an alternative measuring
method for measuring the protective conductor current or con-
tact current after an insulating resistance measurement has
been passed. Exceptions are devices of protection class I with
switched on heating elements and a total connected load of
more than 3.5 kW. If such a device does not pass the insulating
resistance measurement, it is still considered to be in proper
condition if the protective conductor current according to para-
graph 5.5 of the mentioned standard is not exceeded.
Symbol:
The
measuring adapter
can be used for measuring the following
leakage or fault currents by means of the alternative leakage cur-
rent measuring method, provided that the test is supported by the
connected
appliance
tester:
I
PE
– protective conductor current
I
Cont
– contact current
I
Leak
– device leakage current
I
PLeak
– patient leakage current
For
alternative leakage current measurement
, the
measuring adapter must
not
be connected to the
mains via the CEE 32 connector.
Single-phase devices can be tested in the same
way.
Before testing
Disconnect the test sample from the mains supply.
Switch the rotary switch (7) of the
measuring
adapter
to position "
L1-L2-L3
".
The rotary switch (8) of the
measuring adapter
must be set to the position for
appliance testing
.
6.2.1. R
PE
– Protective conductor resistance
Before testing
Before starting the test, determine the internal
R
PE
resistance of the measuring adapter (see chapter 7).
Disconnect the test sample from the mains supply!
The maximum testing current for R
PE
measurement
is
10 A
!
The rotary switch (7) of the
measuring adapter
can
be used in any position for R
PE
measurement.
The rotary switch (8) of the
measuring adapter
must be set to the position for
appliance testing
.
Test procedure (VDE 0701-0702)
Portable test sample
Connect the CEE connector of the test sample to the
corresponding CEE socket of the measuring adapter.
Start the
R
PE
measurement on your appliance tester.
Use the test probe to scan all accessible conductive
parts of the test sample that are connected to the protec-
tive conductor.
Application
Portable test sample
Connection diagram
Circuit diagram
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7
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