4 potential equalization, Options, Pr 5230 instrument manual – Rice Lake PR5230 Fieldbus Transmitter User 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
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