MRCDB300 series
MRCDB300-series_D00343_05_Q_XXEN/01.2022
7
I
C
aution
!
Risk of injury due to accessible live conductors!
The measuring current transformer must be connected to the corresponding evaluator before
the first use and before commissioning of the monitored system.
i
Do not route any shielded cables through the measuring current transformer.
i
Application in railway vehicles / DIN EN 45545-2:2016!
If the horizontal or vertical distance to adjacent components which do not meet the require-
ments in table 2 of DIN EN 45545-2 is less than 20 mm or less than 200 mm respectively, they
are to be regarded as grouped. Refer to DIN EN 5545-2 chapter 4.3 Grouping rules.
Completing and checking installation
The installation must be completed with a functional test: Press the "T" button for 5…10 s.
The system operator is obliged to have the MRCD protective devices checked at regular intervals
by an electrically skilled person to ensure that they are functioning properly. This requirement is
deemed to be satisfied for normal and environmental conditions if the test intervals mentioned in
DGUV V3 (German Social Accident Insurance Regulation 3) are adhered to. The test intervals are
to be interpreted in accordance with the risk assessment.
The recurrent tests must include at least the following:
• Testing the environmental conditions for pollution, mechanical damage or insulation damage.
• To trip the circuit breaker, the integrated or the external test button is to be pressed.
All current-carrying cables must be routed through the mea-
suring current transformer.
PE
L1
L2
L3
N
P1 (K): YE
P2 (L): GY
Never route an existing protective conductor through the
measuring current transformer.
The primary conductors should only be bent from the specified
minimum distance. The minimum bending radius specified by
the manufacturers for the conductors used must be observed.
* Distance to 90° angle = 2 x outer diameter.
*
*
The cables must be aligned with the centre of the measuring
current transformer.
