Measuring The Substitute Leakage Current - Unitest Telaris 0751 Instruction Manual

Measuring the Substitute Leakage Current

6.3 Measuring the Substitute Leakage
Current
6.3.1 General Information regarding the
Substitute Leakage Current
In compliance with DIN VDE 0701:2000-09,
the substitute leakage current measurement is
an alternative measurement procedure to de-
termine the PE resistance or touch current. Ac-
cording to DIN VDE 0702, this is a substitute
measurement for the insulation measurement
when dealing with UUTs equipped with heating
elements.
Before any substitute leakage current meas-
urement, ensure that the UUT is not connect-
ed to live voltage.
During the substitute leakage current meas-
urement, all switches of the UUT must be
switched on to ensure that the all circuits in-
side are be considered when performing the
measurement.
6.3.2 Measuring the Substitute Leakage
Current (IPE SUBS)
Performing the measurement:
Connect the UNITEST TELARIS 0751 via the
mains plug (1) to a functional and correct wired
and grounded mains socket.
Turn the 'Measurement function" selection
switch (15) to position 'IPE SUBS'.
Table 2: Limit value of the substitute leakage current
Description of the UUTs
UUT of protection class I
UUT of protection class II
UUT of protection class I with heating element >3,5 kW
UUT of protection class I with heating element up to 6 kW
UUT of protection class I with heating element
28
Set the limit for the insulation resistance using
the key LIMIT(7); for the limit values, please
refer to table 2.
Plug the UUT mains plug into the test socket
(3), please refer to Figure 6.8.
Switch on the UUT.
Press the key "Start" (9). The unit symbol
which is blinking on the display is an indication
for the active measurement procedure.
Read the measurement value from the LC dis-
play (6). If the limit value display is active, the
symbol 'LIMIT' (21) indicates that the limit
value has been exceeded.
For appliances of protection class II or III, ad-
ditionally connect the 'PE' socket (5) to all
touchable, conductive parts of the UUT; please
refer to Figure 6.9. This is also applicable for
conductive parts of class I appliances which
are NOT connected to PE.
Continue the substitute leakage current meas-
urement for all other touchable, conductive
casing parts of the UUT.
The measurement results can be saved by
pressing the key "Store" (10). For references
regarding the saving of measurement values,
please refer to section 7.1 and 7.2.
according to DIN VDE 0701
3,5 mA
0,5 mA
1 mA/kW
7 mA (see appendix G)
> 6 kW 15 mA (see appendix G)
according to DIN VDE 0702
7 mA
15 mA