VEGA VEGATROL 20 Ex - Manual (Page 5)

VEGATROL 20 Ex 5
2.2 Configuration of an overfill protection
Storage vessels in liquid gas plants of group A, B, C and D
The overfill protection VEGATROL 20 for a storage vessel consists of:
-
VEGATROL 20 system sensor with rod and cable electrode
- signal conditioning instrument VEGATOR 526 W Ex.
Additional instruments:
-
signal conditioning instrument VEGAMET for continuous level measurement or for additional switch point
- overvoltage arresters etc. acc. to the requirements of the system.
VEGATOR 526 W Ex
on
VEGATOR 526 W Ex
!
!
2 Technical Information
Version I: cylindrical tank
Ex-Zone 1
e.g. rod electrode
VEGATROL 20
System sensor
two-wire
line each
(intrinsically safe
circuit)
Not-Ex-area
DISBUS
VEGAMET Ex
Version II: spherical tank
Ex-Zone 1
VEGATROL 20
System sensor
z.B. Seil-
elektrode
Not-Ex-area
VEGATOR 526 W Ex
DISBUS
0/4 … 20 mA
VEGAMET Ex
VEGATOR 526 W Ex
0/4 … 20 mA
VEGATOR 526 W Ex
on
VEGATOR 526 W Ex
!
!
two-wire
line each
(intrinsically safe
circuit)
Continuous level
measurement
Continuous level
measurement
Overfill
protection
Overfill
protection
e.g. cable
electrode
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