3590EKR, 3590EXP, 3590EXT, 3590 EBOX, CPWE, CPWET series indicator E-AF03_05.01_14.07_EN_T.doc
7
GROUND POLE
POSITIONED UNDER
OR NEAR
WEIGHBRIDGE (NOT
SUPPLIED)
GENERAL NOTES:
All the grounding cables must have an adequate length, in order to obtain
an overall resistance of grounding
system less than 1 Ω.
In the case the weighing system regards great and/or outdoor structures, like weighbridges:
-
The grounding connection is to be made by connecting the grounding cables to a grounding bar and the
grounding bar to the grounding pole with a cable section not less than 50 mm2.
-
the cable cross-section must be greater (for example 50 mm
2
instead of 16 mm
2
and 100 mm
2
instead of 50
mm
2
), because the voltage into play is greater (for example thunderbolts);
-
the ground pole must be positioned at a distance of at least 10 metres from the weighbridge structure;
-
one needs to open the SENSE inside the indicator in order to offset the drifts due to the increase in temperature.
One should check and remove, if necessary, the connection between the earth and the neutral wire of the electrical
installation.
EARTHING EXAMPLE WEIGHBRIDGE
LOAD CELL
PLATE
UNDER CELL
(NOT SUPPLIED)
JB8Q POSITIONED ON
THE WALL
SURROUNDING THE PIT
COPPER HOLED PLATE
ON THE SURROUNDING
WALL (NOT SUPPLIED)
U-BOLT BETWEEEN PLATE UNDER
CELL AND WEIGHBRIDGE
(NOT SUPPLIED)
WEIGHBRIDGE
Ø 8 (50 mm² section)
Ø 11,3 (100 mm² section)
EARTH CABLES
(NOT SUPPLIED)