With Schuko Measurement Adapter (Option) - Unitest Telaris 0751 Instruction Manual

Measuring the PE earth leakage current
6.6 Measuring the PE earth leakage current
(PE current) and the Differential Current
with Schuko Measurement Adapter
(Option)
6.6.1 General Information regarding the PE
earth leakage current and Differential
Current
In compliance with DIN VDE 0701:2000-09, the PE
resistance measurement is considered as an addi-
tional measurement to determine the insulation ca-
pacity for appliances of protection class I.
According to DIN VDE 0702, this is a substitute
measurement for the insulation measurement re-
garding appliances of protection class I, for which
no insulation measurement may or can be per-
formed.
The PE current may be determined either via direct
current measurement within the PE resistance of a
UUT or via the differential current procedure. The
direct measurement may be applied, if the UUT is
not equipped with additional earth connections or if
an insulated UUT installation is possible. The meas-
urement must be performed for both mains plug po-
sitions.
In compliance with DIN VDE 0701/0702, the differ-
ential current measurement is a measurement prin-
ciple to determine the PE resistance current or the
touch current. The result is obtained by performing
a summation current measurement of all active con-
ductors (L-N) pertaining to a UUT. Thus, the total
leakage current of a UUT can be picked up.
The differential current measurement must be ap-
plied if the UUT is equipped with additional earth
connections of if an insulated UUT installation is not
possible. This measurement must also be per-
formed for both positions of the mains plug.
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An external Schuko Measurement Adapter must be
connected to the TELARIS 0751 (Cat. No. 9091) to
measure the PE resistance current, the differential
current, and the load current. This Schuko Mea-
surement Adapter allows the measurement of the
PE current in compliance with the direct measure-
ment principle and the differential current proce-
dure.
The PE resistance current measurement may
only be performed after successful PE resist-
ance test.
The UUT is put into operation for this test, i.e.
it will be supplied with mains voltage. For this,
the UUT must be switched on. Motor driven
UUTs or UUTs equipped with heating units may
cause a danger for the controller (observe the
UUT instruction manual!).
Observe that mains voltage is already present
when plugging in the mains plug of the Schuko
Measurement Adapter! UUTs that are already
switched on are put into operation immediate-
ly after the plug-in!
The Schuko Measurement Adapter is not
equipped with built-in fuses. Observe that over
current and short-circuit protection must be
ensured by the supplying mains system.
Therefore, the Schuko Measurement Adapter
may only be connected to a functional and cor-
rectly wired and grounded mains socket, pro-
tected at maximum 16 A!
The maximum output current for the mains
socket of the Schuko Measurement Adapter
amounts to 16A! The test appliance may not be
used for permanent measurements.
At measurements with faulty appliances or ap-
pliances with high leakage currents a preced-
ing RCD (Residual Current Device) could trip.