Berthold LB 4700 - Overview of Explosion Protection Concepts

6 Safety Instructions Safety Manual / Explosion Protection Manual
10
56926BA26, Rev. 06, 04/2019
6.1 Overview of explosion protection concepts
Zones: Not Intrinsically Safe
Variants
CrystalSENS:
LB 4700-1x-1x
UniSENS:
LB 4700-2x-1x
SuperSENS:
LB 4700-3x-1x
Signal Circuits
Not intrinsically Safe
Explosion Protection Concept of the Compartments
All Compartments
Ex "t" (dust protection)
Electronics Compartment
(Housing)
Ex "d" (flameproof enclosure)
Terminal Compartment
Ex "e" (increased safety)
Ambient Temperature
T
a
min.
-40 °C
Temperature class
1)
(T
a
max.) /
max. surface temperature
T1-T5 (T
a
≤ +80 °C) / 85°C
T1-T6 (T
a
≤ +65 °C) / 80 °C
T6 (T
a
≤ +75 °C) / 80 °C
II 2 G (Zone 1)
Ex db eb IIC T1-T6 Gb
II 2 D (Zone 21)
Ex tb IIIC T85 °C Db
NEC
Temperature class
1)
(T
a
max.) /
max. surface temperature
T1-T6 (T
a
≤ +75 °C) / 80°C T1-T6 (T
a
≤ +65 °C) / 80 °C
Class I, Zone 1
AEx db eb IIC T1-T6 Gb
Zone 21
AEx tb IIIC T85 °C Db
CEC
Temperature class
1)
(T
a
max.) /
max. surface temperature
T1-T6 (T
a
≤ +75 °C) / 80°C T1-T6 (T
a
≤ +65 °C) / 80 °C
Class I, Zone 1
Ex db eb IIC T1-T6 Gb
Zone 21
Ex tb IIIC T85 °C Db
Protection Principle
Ex "d"/"e"/"t"
1) Temperature Class: Equipment Temperature Class and Installation Temperature Class