Promag 50
Wiring
Hauser
55
4.3.5
Exampels for potential equalization connections for
Promag L, W, P
Standard
case
Special cases
Operating conditions
Potential equalization
When using the measuring device in a:
• Metal, grounded pipe
Potential equalization takes place via the ground terminal of the
transmitter (standard situation).
!
Note!
When installing in metal pipes, we recommend you connect the
ground terminal of the transmitter housing with the piping.
A0011892
Fig. 42:
Via the ground terminal of the
transmitter
Operating conditions
Potential equalization
When using the measuring device in a:
• Metal pipe that is not grounded
This connection method also applies in situations where:
• Customary potential equalization cannot be ensured
• Excessively high equalizing currents can be expected
Both sensor flanges are connected to the pipe flange by means of
a ground cable (copper wire, 6 mm² (0.0093 in
)) and grounded.
Connect the transmitter or sensor connection housing, as
applicable, to ground potential by means of the ground terminal
provided for the purpose.
Ground cable installation depends on the nominal diameter:
• DN
300: The ground cable is mounted directly on the
conductive flange coating with the flange screws.
• DN
350: The ground cable is mounted directly on the
metal transport bracket.
!
Note!
The ground cable for flange-to-flange connections can be
ordered separately as an accessory from Hauser.
A0011893
Fig. 43:
Via the ground terminal of the
transmitter and the flanges of the pipe
When using the measuring device in a:
• Plastic pipe
• Pipe with insulating lining
This connection method also applies in situations where:
• Customary potential equalization cannot be ensured
• Excessively high equalizing currents can be expected
Potential equalization takes place using additional ground disks,
which are connected to the ground terminal via a ground cable
(copper wire, min. 6 mm² (0.0093 in
)). When installing the
ground disks, please comply with the enclosed Installation
Instructions.
A0011895
Fig. 44:
Via the ground terminal of the
transmitter
DN
300
£
DN
350
³