Electrical connection Proline Promag W 800
44 Endress+Hauser
Pipe with cathodic protection
This connection method only take place, if both of the following requirements are fulfilled:
• Metal pipe without liner or pipe with electrically conductive liner
• Cathodic protection is integrated in the operator protection
A0016319
Abb. 28: Potential equalization and cathodic protection
1 Isolating transformer power supply
2 Electrically isolated to pipe
3Capacitor
1. Connect the measuring device potential-free compared to protective earth to the
power supply.
2. Install the measuring device electrically isolated in the pipe.
3. Connect the two flanges of the pipe with a ground cable.
Ground cable = copper wire, at least 6 mm² (0.0093 in²).
4. By connecting the shielding of the signal cables a capacitor has to be used.
For remote version: The ground terminal in the example refers to the sensor and not to
the transmitter.
The required ground cable can be ordered from Endress+Hauser.
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