Vega Capacitive electrodes EL … Bedienungsanleitung PDF herunterladen (Seite 33)

Capacitive electrodes EL … 33

A2E2

Typ

B62-36G

Not-Ex-area (control

room)

either overvoltage protection instrument

Outer

isolation

Screen

Signal conditioning

instrument or safety

barrier

Cathodic corrosion protection

2 … 24 V (object voltage)

Note:

[A] Between control room and overvoltage

protection system a suitable cable, if required

with screen or metal cover, should be used.

Screen or metal cover - if required - must be

only connected to the overvoltage protection

system on the electrode side. In case of

cathodic corrosion protection the cable must be

provided with an outer isolation.

Ex-area

Electrode EL

External

earth

terminal

ELB

2-36

[1]

[1] Overvoltage protection module ELB 2-36

mounted to oscillator (L

= 0,15 mH, C

= 1,5 nF)

Vessel

Zone 0

Without cathodic corrosion protection: to

potential equalization line

Electrical connection

Vessel with cathodic corrosion protection

A2E2

Typ

B62-36G

Typ

B62-36G

B A

Ex-area

Not-Ex-area (control

room)

either overvoltage protection instrument

Metal housing

without earthing

either overvoltage protection instrument

B62 - 36 G Ex 0 (metal housing) or

B62 - 36 G Ex (plastic housing)

= 0,15 mH, C

= 1,5 nF)

Electrode EL

Outer

isolation

Outer

isolation

Screen

Signal conditioning

instrument or safety

barrier

Earth / PA-terminal

Cathodic corrosion protection

2 … 24 V (object voltage)

External

earth

terminals

Note:

[A] and [B] see "Vessel without cathodic corrosion protection“ on

the previous page.

min. 4 mm

Vessel

Zone 0

Capacitive electrode with integral overvoltage protection module

Vessel with/without cathodic corrosion protection

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