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32 Capacitive electrodes EL …

Capacitive electrode with external overvoltage protection unit

Vessel without cathodic corrosion protection

A2E2

Typ

B62-36G

Typ

B62-36G

Ex-area

Not-Ex-area (control

room)

either overvoltage arrester

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

to potential

equalisation line

External earth terminal

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.

[B] Between overvoltage protection system and capacitive electrode a suitable cable with metal cover, screen or

a suitable cable with metal protection tube must be used (screen, metal cover or protective tube must be

connected to the potential equalization).

Test voltage of cable A and B: ≥ 500 V AC

min. 4 mm

Vessel

Zone 0

Electrical connection

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Vega Capacitive electrodes EL … Bedienungsanleitung Seite 32