Internally Insulated Piping With Cathodic Corrosion; Potential - ABB ProcessMaster FEM630 Operating Instructions Manual

FE M63 0 | E L EC TR OM AG N E T I C FLOWM E T E R | O I/F E M6 3 0-EN RE V. A
6 . . .Electrical connections
. . .Sensor grounding

Internally insulated piping with cathodic corrosion

potential

2 3 45
6 10
1
8
1
Piping flange
2
Insulating plate
3
Gasket / insulating ring
4
Grounding plate
5
Insulating pipe
6
Flange
7
Liner
8
Insulation
9
Sensor
Figure 31 View Screw bolts
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.
2
6
9
7 6
1
G11050
A
Connection line corrosion potential*
B
Insulated screw bolts without grounding plates
1
Insulated piping
2
Functional ground
3
Grounding plates
* ≥ 4 mm2 Cu, not included in the delivery, to be provided on-site
Figure 32 sensor with grounding plate and functional ground
The corrosion protection potential must be diverted through
a connecting line
2
B
B
3
A
A away from the insulated installed sensor.
31
1
B
B
G11049