fafnir SEPARIX-Control CT Technical Documentation Manual page 35

V Technical data
The following electrical input values apply to the sensors:
U ≤ 30 V
i
I ≤ 200 mA
i
P ≤ 1 W
i
The effective internal capacitance and inductance that are externally effective, are negligibly small. If the
sensors are supplied with integrated cable, then the electrical characteristics are:
C = 200 /
pF
c m
L = 1 /
µH
c m
L /R = 30 /
µH
c c Ω
The sensors may be used in the following ambient temperature range:
T = -40 °C ... +110 °C
a
When using a sensor with overvoltage protection, the maximum temperature is +90 °C for the sensor
head.
General information (see also EN 60079-0, section 1):
Zone 0 exists only under atmospheric conditions:
Temperature range:
Pressure range:
Oxidants:
The sensors achieve a housing protection of:
Degree of protection:
The following technical data apply to sensors with overvoltage protection:
The nominal DC spark-over voltage amounts to:
U = 350 V ± 20 %
The nominal impulse discharge current amounts to:
I = 20 kA (10 × Wave 8/20 µs)
The nominal alternating discharge current amounts to:
I = 20 A (10 × @ 50 Hz, 1 s)
The insulation resistance of an overvoltage arrester amounts to:
R > 10 GΩ
VI Specific conditions for use
1. Overfill Prevention Sensor and Level detectors with overvoltage protection do not comply with the
dielectric strength requirements according to EN 60079-11, section 6.3.13. When performing an in-
sulation test of the intrinsically safe circuit it is therefore necessary to disconnect the device.
2. When using the integrated overvoltage protection, integration into the equipotential bonding is re-
quired.
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