SPECIAL EQUIPMENT (OPTIONAL)
98 OI 248 (EN) REV6 /REV0
12.1.1 Functional description
The EasyCheck density monitor unit is equipped with an additional
shut-off valve that permits separation of the pole column gas com-
partments (G1) from the gas compartment of the density monitor
and the central filling connection (G2) without loosening couplings
or screws. This will achieve best error avoidance and recommissio-
ning safety.
The valve is actuated via a lever that covers the greatest part of the
density monitor dial in the test position. Thus, the valve position can
be recognised even from a long distance, and unmonitored operati-
on of the circuit breaker in the test position can be recognised and
avoided.
• For movement of the lever from the position "Operation" to the
position "Test", the right hand must be used to unlock the
automatic latching tab while the left hand at the same time moves
the lever clockwise by 90°. This two-hand operation prevents
accidental shifting of the lever from the position Operation to the
position Test.
Additionally, the valve can be secured against unauthorised actua-
tion in the position Operation.
Figure Pneumatic plan:
Element Description
(G1) Gas compartment 1
(G2) Gas compartment 2
C1 C1 gas volume of the switchgear
Q1 Shut-off valve "EasyCheck"
P1 Manometer
X1 Central filling coupling (DILO)
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