Gossen Metrawatt PRÜFKOFFER METRATESTER 5+ 3PVDE-tester VDE 0104 · IEC 61010-1 · VDE 0404 · DIN 43751 · VDI/VDE 3540 · V M 700 K Manual De Usuario
Los códigos de productos
M 700 K
GMC-I Messtechnik GmbH
17
6.4
Measuring Contact Current
6.4.1
Contact Current Measurement – Differential Current
This test must be executed for all protection class II devices, as well as protection class I
devices with exposed conductive parts which are not connected to the protective conductor
(practically all DUTs with electrically actuated switches and relays). If the DUT is equipped
with a non-polarized mains plug, the test must be performed with the mains plug poled in
both directions. Connection per section 5.1.
The larger of the two measured values is deemed valid. Testing in accordance with the
differential current measuring method.
devices with exposed conductive parts which are not connected to the protective conductor
(practically all DUTs with electrically actuated switches and relays). If the DUT is equipped
with a non-polarized mains plug, the test must be performed with the mains plug poled in
both directions. Connection per section 5.1.
The larger of the two measured values is deemed valid. Testing in accordance with the
differential current measuring method.
Attention
!
!
The DUT is placed into operation.
➭ Turn off the device under test.
➭ Plug the DUT in to the appropriate surface mount socket at the test case.
➭ Connect a measurement cable with test probe to the socket/terminal (5), and contact all
➭ Plug the DUT in to the appropriate surface mount socket at the test case.
➭ Connect a measurement cable with test probe to the socket/terminal (5), and contact all
exposed conductive parts at the DUT, or all conductive parts which are not connected to
the protective conductor at protection class I devices.
the protective conductor at protection class I devices.
➭ Set the L1/L2/L3 switch (2) to “L1”.
➭ Set the NETZ-VDE switch (1) to “NETZ”.
➭ Signal lamps L1, L2 and L3 (19) indicate the presence of line voltage.
➭ Place the device under test into service by switching it on.
➭ Set the measuring function selector switch (6) at the METRATESTER 5+ test instrument
➭ Set the NETZ-VDE switch (1) to “NETZ”.
➭ Signal lamps L1, L2 and L3 (19) indicate the presence of line voltage.
➭ Place the device under test into service by switching it on.
➭ Set the measuring function selector switch (6) at the METRATESTER 5+ test instrument
to the “I
Diff
20 mA” position and read the differential current value in mA from the display
at the test instrument.
The limit value is 0.5 mA.
6.4.2
Testing in Accordance with the Direct Method
The DUT can remain connected to the mains for this test. When testing in accordance with
DIN VDE 0701-0702, DUTs with external connections such as data cables etc. can be
tested within their entire configuration at the installation site. However, due to the fact that
this test does not provide any indication as to the safety of the device under test, complete
testing via the connector sockets at the test case must be performed as soon as
disconnection from the mains and the connector cables is possible – insofar as permitted by
the device.
DIN VDE 0701-0702, DUTs with external connections such as data cables etc. can be
tested within their entire configuration at the installation site. However, due to the fact that
this test does not provide any indication as to the safety of the device under test, complete
testing via the connector sockets at the test case must be performed as soon as
disconnection from the mains and the connector cables is possible – insofar as permitted by
the device.
Note!
If the DUT is defective, the electrical system’s RCD (residual current circuit breaker)
may be tripped during this test which would result in interruption of supply power.
may be tripped during this test which would result in interruption of supply power.
➭ Connect the test case to an electrical outlet within the same power supply circuit to
which the device under test is also connected to this end.