MI 2087 Instaltest 61557
Measurement instructions
29
3.6. RCD - Trip-out Time
In order to assure safe conditions, RCD device must trip-out within a certain time, in
case of present fault on connected electric appliance. See allowed trip-out time
ranges in the following table.
Type of RCD
protection
switch
I
∆∆∆∆
n 2I
∆∆∆∆
n 5I
∆∆∆∆
n* Remark
Standard
0,3 s
0,15 s
0,04 s
max. allowed trip-
out time
0,5 s
0,2 s
0,15 s
max. allowed trip-
out time
Selective
0,13 s
0,06 s
0,05 s
min. allowed trip-
out time
* If I
∆
n
≤
30 mA, test current of 0,25 A is used instead of 5I
∆
n.
Table 1
. Allowed trip-out times according to EN 61009 standard
For additional general information concerning the measurement, refer to enclosed
handbook
Measurements on electric installations in practice and theory
.
How to carry out the measurement?
Step 1
•
Connect test cable
(Plug commander or Universal test cable) to Instaltest 61557.
•
Set function switch to
t
∆∆∆∆
N
position, “Trip-out Time initial menu” will be displayed;
see the figure below.
Fig. 23.
Contact Voltage initial menu
Step 2
•
Select Nominal differential current I
∆
n
as follows:
•
Press the
SELECT
key, last set Nominal differential current starts to blink.
•
Select appropriate value using the
↑↑↑↑
and
↓↓↓↓
keys. The following values are
available to be selected: 10, 30, 100, 300, 500 or 1000 mA.
G ......... Standard (
G
eneral) type of
RCD is selected.
S
is
displayed, if Selective
type is selected.
∼
......... Start polarity of test
current.
×1........ Selected multiplier of nominal
differential current.
