MI 2087 Instaltest 61557
Measurement instructions
34
3.8. RCD - Automatic Test
Purpose of the function is to carry out complete test of RCD and measurement of
belonging parameters (Contact Voltage, Fault loop resistance and Trip-out time at
different fault currents) in one set of automatic tests, led by the instrument. If any false
parameter is noticed during this automatic test, individual parameter test is to be used
for further investigation.
How to carry out the automatic test?
Step1
•
Connect test cable
(Plug commander or Universal test cable) to Instaltest 61557.
•
Set function switch to
RCD
AUTO
position, “Auto function initial menu” will be
displayed; see the figure below.
Fig. 26.
Auto function 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 or 500 mA.
Step 3
•
Select Type of tested RCD as follows:
•
Press the
SELECT
key after setting Nominal differential current, last set type
starts to blink.
•
Select appropriate type using the
↑↑↑↑
and
↓↓↓↓
keys. Standard (General) type (
G
is
displayed) or Selective type (
S
is displayed) can be selected.
G .........Standard (
G
eneral) type of
RCD is selected.
S
is
displayed if Selective
type is selected.
