Cathodically

Protected Metal

Tanks

ground lug

Cathodically protected metal tanks are never directly grounded. However, the impedance of the supply source is so low that it will not cause any problems. The shielding of the loop cable should be grounded at one end only (the tank end) to avoid short-circuiting the cathode protection voltage.

The ground lug on the

SITRANS LC 500 can be connected to the tank as shown.

(See page 27 for further grounding details.)

optional stilling

well

metal

Interconnection

VKP

Note: Grounding the SITRANS LC 500 as illustrated above provides only system

grounding for referencing purposes: it does not provide safety grounding.

Non-Conductive Tanks

Non-metallic tanks always require a stilling well or proper grounded conductive medium.

Connect the ground lug on the SITRANS LC 500 to earth ground. If the stilling well is integral to the SITRANS LC 500, it is now grounded.

If the vessel has a stilling well provided, make sure that the metal parts of the stilling well are properly grounded.

ground lug

stilling well

non- metallic

7ML19985GE01

SITRANS LC 500 – INSTRUCTION MANUAL

Page 29

Page 35
Image 35
Siemens Sitrans, LC 500 instruction manual Cathodically Protected Metal Tanks, Non-Conductive Tanks