User Manual

GMC-I Messtechnik GmbH 31
Figure 5/5: After activating test voltage, leakage current is mea-
sured between short-circuited mains conductors L and N (DUT
mains plug) and accessible conductive parts (probe contact)
which are connected to the housing.
If the DUT includes terminals for application parts, they must be
short-circuited and contacted with test probe P1 as well.
Setting Measuring Parameters
1
Measurement must be performed with mains polarity in both directions. The larg-
est value is documented
Direct Selection – Setting the Measurement Type
Direct Selection – Setting Polarity –
for Direct and Differential Only
Test Sequence
➭ Set the rotary switch to the I
G
position.
➭ Connect the DUT in accordance with the selected measuring
method.
➭ Set the parameters:
Select the Direct, Differential or Alternative measurement type.
➭ As an alternative, you can select the measurement type
directly using the key shown at the right.
➭ In the case of direct and differential current measurement,
measurement must be performed with mains plug po-
larity in both directions. Select the respective polarity
to this end by pressing the NL/LN key.
➭ Start the test: press the START/STOP key.
➭ After each reconnection to the mains, and as soon as
the first test is started, a mains connection test is exe-
cuted.
➭ In the case of the direct or differential measurement type:
Acknowledge the warning which indicates that line
voltage will be connected to the test socket.
➭ The measured values are displayed. The measured
value recording symbol shown at the right appears.
Each time this key is pressed, the currently displayed
measured value is saved to the buffer.
➭ Stop the test: press the START/STOP key.
The save symbol appears (floppy disk showing the
number of measured values stored to buffer memory)
and prompts you to save the measured values to an ID
number.
➭ Read the measured values and compare them with the
table of permissible limit values.
➭ Press the ESC key in order to discard the measured
values stored to buffer memory and acknowledge by
pressing the key shown at the right.
Maximum Allowable Limit Values for Equivalent Leakage Current
in mA
I
GA
Device leakage current
I
EA
Equivalent leakage current
PE Protective conductor
1
For devices with heating power  3.5 kW
2
This limit value is not taken into consideration in the DIN EN 62353
(VDE 0751-1) standard.
Measuring Parameter Meaning
Measurement type
Direct Direct measuring method (via test socket),
optional probe contact
Differential Differential current measurement
Alternative Equivalent leakage current measuring method with probe
contact
Polarity
1
– for direct and differential measurement type only
L/N or N/L Selection of test voltage polarity
U(set) – for alternative measurement type only
110 V, 115 V,
220 V, 230 V, 240 V
Selection of line voltage as test voltage
Frequency(set) – for alternative measurement type only
48 Hz to 400 Hz Selection of line frequency as test frequency
Measuring
Parameter
Meaning
Measurement type
Direct Direct measuring method (via test socket)
Differential Differential current measurement
Alternative Equivalent leakage current measuring method
Measuring
Parameter
Meaning
Measurement type
L/N or N/L Selection of polarity of the line voltage applied to the test
socket
Test Standard I
GA
I
EDL
VDE 0701-0702
PC I: 3.5 / 1 mA/kW
1
PC II: 0.5
IEC 62353
(VDE 0751-1)
PC II
0.2
2
PC I (PE or parts connected to PE)
1
Permanently connected devices with PE
10
Portable x-ray devices with additional PE
5
Portable x-ray devices without additional PE
2
Devices with mineral insulation
5