Rice Lake PR5230 Fieldbus Transmitter - Manual (Page 34)

Options PR 5230 Instrument Manual
EN-34 Sartorius
3.2.8.4 Potential Equalization
Possible compensatory currents between several conducting plant sections will be avoid by installing a
potential equalization in the ex areas.
PR5230-WE1-…
Load Cells
Wägezellen
Junction Box
Verbindungskasten
Ex Area Zone 1/21
Ex-Bereich Zone 1/21 Non Ex Area
Kein Ex-Bereich
(1) (2) (1) (1) (2) (3)
(6) (6)
(A)
(4)
(4) (4)
(A) (A) (A) (A) (A) (A)
(E)
(5)
(B)
(1)
Pos. Component Cross-section
(1) Conductor for additional potential equalization ≥ 4.0 mm² Cu
(2) Conductor for potential equalization ≥ 6.0 mm² Cu
(3) Conductor for potential equalization ≥10.0 mm² Cu
(4) Main conductor for potential equalization ≥10.0 mm² Cu
(5) Earthing conductor ≥10.0 mm² Cu
(6) Load cell by-pass ≥10.0 mm² Cu
(A)
Sub potential equalization terminal
(B) Main potential equalization terminal
(E) To earth electrode