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Gossen Metrawatt GmbH
15.11 Measuring Time to Trip for RCDs of the Type PRCD – tPRCD
Schematic Diagram
Wiring Diagram
Definition
According to DIN VDE 0100-600:2008, verification must be pro-
vided that RCCBs are tripped within the time period specified in
DIN VDE 0100-410.
PRCD
Portable residual current device
Application
The PRCD under test is plugged into the test socket at the test
instrument. The PRCD’s phase conductor must be contacted
with test probe P1 in order to trip the PRCD.
Note
Testing of PRCDs (test procedure and time to trip) is only
possible for DUTs with a nominal voltage of 230 V.
Note
Measurement of time to trip isn’t possible in IT systems.
Test Procedure
➭
Set the rotary switch to the
t
PRCD
position.
➭
Plug the PRCD into the test socket at the test instrument and
connect the test probe to P1.
➭
Start the test:
Press the
START
/STOP
key.
➭
Acknowledge the warning which indicates that line
voltage will be connected to the test socket.
Execute the following steps when prompted to do so:
Note
Please note that test probe P1 is in continuous contact
with the phase conductor from the point in time at which
the PRCD is plugged in until it trips. Premature discon-
nection of the test probe may result in erroneous mea-
sured values.
➭
After each reconnection to the mains, and as soon as the first
test is started, a mains connection test is executed.
➭
If the probe test reveals that probe P1 was not connected:
connect probe P1 as described above.
➭
Switch the PRCD on after connection to line voltage (e.g.
reset button on PRCD).
➭
Contact neutral conductor L at the PRCD with test probe P1
(ascertain by trial and error if necessary).
➭
The test is automatically ended and time to trip is displayed
after the PRCD is tripped.
➭
The save icon appears and prompts you to save the
measured values to a test object ID number.
➭
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.
Single Measurements,
Rotary Switch Level: Green
Ro
ta
ry
Switc
h
Po
si
ti
o
n
Measuring Functions
Meas. Type
With Mains
to Test Socket
t
PRCD
ta
PRCD time to trip for 30 mA PRCD
U
LN
Line voltage at the test socket
t
PRCD
Summary of Contents for SECULIFE ST BASE 25
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