GMC-I Messtechnik GmbH
15
The fuses may only be replaced when the
instrument is voltage-free, i.e. the instrument
must be disconnected from mains supply
power and may not be connected to a mea-
suring circuit. The fuse type must comply
with the specifications in the technical data
or the labeling on the device.
8.2
Safety Checks – Testing in Compli-
ance with DGUV Provision 3
Subject your test adapter to regular safety
checks.
The test adapter has been designed in con-
formity with standards IEC 61010 and
VDE 0404 as a safety class I and II test
instrument.
The testing of protective conductor, insula-
tion resistance as well as contact current is
described in the following subchapters.
8.2.1
Testing of Protective Conductor
Resistance R
PE
Connection and/or Contacting of PRCD Adapter
Single-phase (230 V)
The protective conductor resistance test is
performed between the PE contact of the
mains socket (earthing contact plug (7)) and
the PE contact
PRCD IN
(both earthing con-
tact outlet (4) and 4 mm parallel PE jack (9)).
Testing of Single-phase Connection
➭
Turn the right rotary selector switch of
the PRCD adapter to position 1~ON.
➭
Turn the left rotary selector switch to any
position*.
Apart from the exceptional positions indi-
cated below, a protective conductor resis-
tance of R
PE
< 2
Ω
is admissible. This is due
to the design of the PRCD adapter.
*
The following positions in which errors
are simulated for measuring purposes
must be exempt from this test:
•
Conductor interruption:
PE (orange), PE (green=3P)
→
> 30 M
Ω
•
Reversed conductors:
L1-PE (orange), L1-PE (green), L2-PE
(green), L3-PE (green)
→
> 30 M
Ω
•
Voltage on protective conductor:
PE-Uext (green/orange) approx.1.5 M
Ω
Connection and/or Contacting of PRCD Adapter
3-phase (400 V)
The protective conductor resistance test is
performed between the PE contact of the
mains plug (CEE plug (8)) and the PE con-
tact
PRCD IN
(both CEE socket (6) and 4 mm
parallel PE jack (9)).
Testing of 3-phase Connection
➭
Turn the right rotary selector switch of
the PRCD adapter to position 3~ON.
➭
Turn the left rotary selector switch to any
position*.
Apart from the exceptional positions indi-
cated below, a protective conductor resis-
tance of R
PE
< 2
Ω
is admissible. This is due
to the design of the PRCD adapter.
* The
following
positions in which errors
are simulated for measuring purposes
must be exempt from this test:
•
Conductor interruption:
PE (orange), PE (green=3P)
→
> 30 M
Ω
•
Reversed conductors:
L1-PE (orange), L1-PE (green), L2-PE
(green), L3-PE (green)
→
> 30 M
Ω
•
Voltage on protective conductor:
PE-Uext
(green/orange) approx.1.5 M
Ω
8.2.2
Testing of Insulation Resistance:
The test is performed in the respective
selector switch position 1~ON and/or 3~ON
on short-circuited contacts L-N and/or L
123
-
N (for earthing contact and/or CEE plugs) of
•
mains power cables (7) and/or (8)
•
PRCD OUT
connection cables (2) and/or (1)
•
PRCD IN
sockets (4) and/or (6)
against PE in each case.
The usual limit values apply in these cases.
PROFI
TEST
⏐
P
RCD
Maintenance