Level switch 468.450
Application:
Function:
Technical Data:
Order Designation:
The level switch serves to monitor the level
of liquids (minimum levels) and must be
used for others than intrinsically safe
aggregates.
The level switch consists of a brass tube
hermetically sealed at the top and bottom,
which contains a Reed contact in its bottom
section. The brass tube is screwed into the
wall of a tightly sealed distribution box (GG20 grey cast iron). This box is equipped with
a 6-pole terminal base for intrinsically safe
circuits. A lide-type copper float equipped
with a ring-type magnet in its upper section
moves on the brass tube. The magnet
closes the Reed contact when it has reached its lowest position, i.e. minimum liquid
level. The Reed contact may only be used
as a switching element for circuits in intrinsically safe systems.
Explosion protection class
in accordance with VDE 0170: (Sch)i
Protection type
in accordance DIN 40050: IP54
Operating pressure max.: 3 bar
Temperature range: 0...80 °C
Total length with lead-in
as specified in the order: ca. 215mm + L1
Total mxwidth: 125 mm
Weight at L1=300: 2,5 kg
To be connected to circuits in intrinsically
safe systems only, operating on 42VAC.
Level switch 468.450 was subjected to the
type approval test as specified in §11of the
"Bergverordnung des Landesoberbergamtes Nordrhein-Westfalen für elektr. Anlagen
(BVOE) (Regulations of Nordrhein-Westfalen state mining authorities for electrical
installations), dated 15.10.1971 / March 1,
1978.
This level switch complies with the requirements specified for its use in electrical
equipment with intrinsically safe circuits.
Level switch
468.450 L1= ...........mm
