Siemens Sitrans 사용자 설명서

7ML19985GE01

SITRANS LC 500 – INSTRUCTION MANUAL

Page 29

Grounding the SITRANS LC 500 as illustrated above provides only system 

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

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.)

metal

ground lug

optional stilling 

well

V

KP

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