Gossen Metrawatt GmbH
57
Test Procedure for Differential Current Method
➭
Before conducting any leakage current measurements, make
sure that the “Ref. voltage L-PE” and “Alt. Test Freq.” mea-
surement parameters have been set correctly in SETUP (see
section 13.3).
➭
Set the rotary switch to the
I
PE
position.
➭
Select the
Differential
measurement type:
– By setting the parameters
or
– Directly via the
Measurement Type
key
➭
Connect the test object’s mains plug (protection class I) to the
test instrument’s test socket.
➭
Start the test:
Press the
START
/STOP
key.
➭
The measurement must be performed with mains plug
polarity in both directions. Press the
Polarity
softkey in
order to change polarity.
➭
Acknowledge the warning which indicates that line
voltage will be connected to the test socket.
➭
Switch the device under test on.
➭
The measured values are displayed. The measured
value recording icon shown at the right appears. Each
time this key is pressed, the currently displayed mea-
sured value is saved to buffer memory.
➭
Turn off the device under test.
➭
End the test:
Press the
START
/STOP
key.
The save icon appears (floppy disk showing the num-
ber of measured values stored to buffer memory) and
prompts you to save the measured values to a test ob-
ject 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.
Test Procedure for Alternative Measuring Method
➭
Before conducting any leakage current measurements, make
sure that the “Ref. voltage L-PE” and “Alt. Test Freq.” mea-
surement parameters have been set correctly in SETUP (see
section 13.3).
➭
Set the rotary switch to the
I
PE
position.
➭
Select the
Alternative
measurement type:
– By setting the parameters
or
– Via the
Measurement Type
key
➭
Connect the DUT’s mains plug (protection class I) to the test
instrument’s test socket.
➭
Start the test:
Press the
START
/STOP
key.
➭
Switch the device under test on.
➭
The measured values are displayed. The measured
value recording icon shown at the right appears. Each
time this key is pressed, the currently displayed mea-
sured value is saved to buffer memory.
➭
End the test:
Press the
START
/STOP
key.
The save icon appears (floppy disk showing the num-
ber of measured values stored to buffer memory) and
prompts you to save the measured values to a test ob-
ject 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 Permissible Limit Values for Protective Conductor
Current in mA
*
For DUTs with heating power of greater than 3.5 kW
Note 1: DUTs which are not equipped with accessible parts that are connect-
ed to the protective conductor, and which comply with requirements for touch
current and, if applicable, patient leakage current, e.g. EDP DUTs with shielded
power pack
Note 2: Permanently connected DUTs with protective conductor
Note 3: Portable X-ray devices and DUTs with mineral insulation
Key
I
PE
Current in the protective conductor (primary leakage current)
Test Standard
I
PE
VDE 0701-0702 / ÖVE E 8701 / SNR 462638
EN 50678 / VDE 0701
EN 50699 / VDE 0702
PC I: 3.5
1 mA/kW *
IEC 60974-4 / EN 60974-4 / VDE 0544-4
5 mA
IEC 62368 / EN 62368 / VDE 0868-1
At ES2 5 mA AC
25 mA DC
Содержание SECULIFE ST BASE 25
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