ELECTRICAL CONNECTIONS
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29
IFC 050
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09/2016 - 4002184003 - MA IFC 050 R03 en
4.6 Grounding the flow sensor
•
The flow sensor must be properly grounded.
•
The grounding cable should not transmit any interference voltages.
•
Do not use the grounding cable to connect any other electrical devices to ground at the same
time.
•
The flow sensors are connected to ground by means of a functional grounding conductor FE.
•
Special grounding instructions for the various flow sensors are provided in the separate
documentation for the flow sensor.
•
The documentation for the flow sensor also contain descriptions on how to use grounding
rings and how to install the flow sensor in metal or plastic pipes or in pipes which are coated
on the inside.
4.7 Connecting the power supply
•
The housings of the devices, which are designed to protect the electronic equipment from
dust and moisture, should be kept well closed at all times. Creepage distances and
clearances are dimensioned to VDE 0110 and IEC 664 for pollution severity 2. Supply circuits
are designed for overvoltage category III and the output circuits for overvoltage category II.
•
Fuse protection (I
N
≤
16 A) for the infeed power circuit, and also a separator (switch, circuit
breaker) to isolate the signal converter must be provided.
CAUTION!
There should be no difference in potential between the flow sensor and the housing or protective
earth of the signal converter!
DANGER!
•
To protect operators from electrical shock, during installation the cable for the power supply
must
must
must
must be run with sheathing insulation up to the mains cover. The insulated individual wires
have to be only below the mains cover!
•
If there is no mains cover or if it has been lost, the 100...230 VAC device may only be operated
from the outside (with a magnet pencil) while closed!