MI 2087 Instaltest 61557
Measurement instructions
32
3.7. RCD – Trip-out Current
For general information concerning Trip-out current 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
I
∆∆∆∆
, t
∆∆∆∆
position, “Trip-out current initial menu” will be
displayed; see the figure below.
Fig. 25.
Trip-out current 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.
Step 3
•
Connect test cable
to tested object (mains outlet or other test terminals),
according to the figure 21. (Plug commander) or figure 22. (Universal test cable).
Step 4
Press the
START
key and release it (double click to
START
key will change positive
start polarity of test current to negative one; see the figure 24). Measurement will be
carried out and result displayed afterwards.
♦
Check Contact Voltage at Trip-out current, Trip-out Time at Trip-out Current and
set Limit Contact voltage by using the
DISPLAY
key.
•
Store displayed results for documentation purpose; see instructions how to store
it in chapter 4.1. Storing of test results.
G .........Standard (
G
eneral) type of
RCD is selected.
S
is
displayed if Selective
type is selected.
∼
.........Start polarity of test current.
