Gossen MetraWatt SECULIFE ST PRO, Руководство пользователя, Страница: 49 / 114

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8.7.3 Device Leakage Current – IE
1
Adapter AT3-IIIE, AT3-IIS or AT3-II S32:
Voltage measuring inputs for leakage current measurement with differ-
ential method (instrument with feature I01)
2
Voltage measuring inputs for leakage current measurement with differ-
ential method and use of a current clamp sensor with (instrument with
feature I01)
Applications
Measurement of device leakage current is required for
medical electrical equipment in accordance with IEC 62353
(VDE 0751-1).
In the case of device leakage current as the sum of all leakage cur-
rent, all probe contact points must be contacted simultaneously.
Definition
Device leakage current is the sum of all leakage current from the
housing, accessible conductive parts and applied parts to PE.
Direct Measuring Method
–
Direct measurement type
– DUT mains plug to test socket
– APPs to APP sockets
– Test probe P1 to P1 terminals
Schematic Diagram
The device under test (PC1) is operated with mains power.
Protective conductor current is measured between the protective
conductor at the mains (test instrument supply power) and the
protective conductor terminal at the DUT via the DUT’s mains
cable. The measurements must be performed with mains plug
polarity in both directions. Polarity is reversed with the
NL/LN key.
Accessible conductive parts which are not connected to the
housing must be contacted with test probe P1.
If the DUT includes terminals for applied parts, they must be con-
nected to the test instrument’s APP sockets. These are short-cir-
cuited in the test instrument and connected to the protective con-
ductor terminal at the DUT.
Wiring Diagram
Single measurements, rotary switch level: green
Sw
it
ch
Po
si
ti
o
n
Measure-
ment Type
With Mains
to Test
Socket Measure-
ment Type
Without
Mains
to Test
Socket Measuring Functions
I
E
Direct
I
E
Device leakage current, TRMS
I
E ~
AC component
I
E=
DC component
U
LN
Test voltage
Differential
I
E
Device leakage current, TRMS
U
LN
Test voltage
Alternative
I
E
Device leakage current, TRMS
U Test voltage
AT3 adapter
1
I
E
Device leakage current, TRMS
U
LN
Test voltage
Clamp
2
I
E
Device leakage current, TRMS
U
LN
Test voltage
I
E