User Manual

96 GMC-I Messtechnik GmbH
21.4 Periodic Testing per DGUV provision 3 (previously BGV A3)
– Limit Values for
Electrical Systems and Operating Equipment
Limit Values per DIN VDE 0701-0702
Maximum Allowable Limit Values for Protective Conductor
Resistance for Connector Cables with Lengths of up to 5 m
1
This value may not exceed 1 Ω for permanently connected data processing sys-
tems (DIN VDE 0701-0702).
2
Total protective conductor resistance of max. 1 Ω
Minimum Allowable Limit Values for Insulation Resistance
* With activated heating elements (if heating power > 3.5 kW and RINS < 0.3 MΩ:
leakage current measurement is required)
Maximum Allowable Limit Values for Leakage Current in mA
* For devices with heating power of greater than 3.5 kW
Note 1: Devices which are not equipped with accessible parts that are
connected to the protective conductor, and which comply with re-
quirements for housing leakage current and, if applicable, patient
leakage current, e.g. computer equipment with shielded power
pack
Note 2: Permanently connected devices with protective conductor
Note 3: Portable x-ray devices with mineral insulation
Key
I
B
Housing leakage current (probe or contact current)
I
DI
Residual current
I
SL
Protective conductor current
Maximum Allowable Limit Values for Equivalent Leakage Current
in mA
1
For devices with heating power ≥ 3.5 kW
Test Standard Test Current
Open-Circuit
Voltage
R
SL
Housing –
Mains Plug
VDE 0701-0702:2008 > 200 mA 4 V < U
L
< 24 V
0.3 Ω
1
+ 0.1 Ω
2
for each
additional 7.5 m
Test
Standard
Test
Voltage
RINS
PC I PC II PC III Heating
VDE 0701-
0702:2008
500 V 1 MΩ 2MΩ 0.25 MΩ 0.3 MΩ *
Test Standard
I
PE
I
C
I
DI
VDE 0701-0702:2008
SC I: 3.5
1 mA/kW *
0.5
SC I:
3.5
1 mA/
kW *
SC II:
0.5
Test Standard I
EL
VDE 0701-0702:2008
SC I: 3.5
1 mA/kW
1
SC II: 0.5