ABB ProcessMaster FEM631 - Internally Insulated Piping with Cathodic Corrosion; Potential

31
FEM630 | ELECTROMAGNETIC FLOWMETER | OI/FEM630-EN REV. A
6 ...Electrical connections
Install grounding plates on each side of the flowmeter sensor.
Insulate the grounding plates from the pipe flanges and
connect them to the flowmeter sensor and to functional
ground.
The screw bolts for flange connections should be mounted
with insulation. The insulation plates and the insulation pipe
are not included in the delivery. They must be provided onsite
by the customer.
The corrosion protection potential must be diverted through
a connecting line A away from the insulated installed sensor.
...Sensor grounding
Internally insulated piping with cathodic corrosion
potential
G11050
3
1066
1
2 45
8 7 6
9
23
G11049
11
2
A
B
3
B
B
B
Piping flange
Insulating plate
Gasket / insulating ring
Grounding plate
Insulating pipe
Flange
Liner
Insulation
Sensor
Connection line corrosion potential*
Insulated screw bolts without grounding plates
Insulated piping
Functional ground
Grounding plates
 Cu, not included in the delivery, to be provided on-site
1
2
3
4
5
6
7
8
9
A
B
1
2
3
Figure 31 View Screw bolts
Figure 32 sensor with grounding plate and functional ground