MPI-536 – USER MANUAL
3.9 Automatic measurements of RCD parameters
The meter enables user to measure automatically RCD triggering time (t
A
), disconnection current
(I
A
), contact voltage (U
B
) and resistance-to-earth (R
E
). In this mode, there is no need to trigger each
measurement by pressing START button. The role of the user is reduced to initiating the measure-
ment by single pressing START and switching RCD on after each tripping.
3.9.1 Setting automatic measurements of RCD parameters
Select U
L
and from then select the required measuring voltage from
the list.
Select the rated differential current of tested protection.
Select the type of tested protection.
Select the parameters to be measured. Designations:
I
A
tripping current
t
A
response time
+ current with increasing head is forced
- current with decreasing head is forced
x0.5 / 1 / 2 / 5 a multiplicity of RCD rated current, according to
IEC 61557-6
Select the metering mode:
full,
standard.
If full mode has been selected, select the type of tested protection.
RCD other than EV. There is no 6 mA DC module in this
type of device.
EV type RCD. Here there is a 6 mA DC module. In this sit-
uation, before the test it is necessary to:
determine according to which standard the measure-
ment is to be carried out (sec. 2.2.1),
determine the multiplication factor of the 6 mA DC dif-
ferential current (EV button). The test settings vary de-
pending on the selected standard.
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