CEMB USA T7-LVDT_120_24 - Manual

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CEMB S.p.A.
- 23826 MANDELLO DEL LARIO (LC) I - Via Risorgimento 9
Tel. (+39)0341/706.111 - Telefax (+39)0341/735.678
www.cemb.com e-mail: [email protected]
TRANSDUCER T7-LVDT/120/24
FUNCTION
Transducer T7-LVDT/120/24 is used for measuring, through the position transducer system
with linear variable differential transformer (LVDT), the OPENING POSITION of steam
VALVES in a turbine;
the measurement is performed by keying the transducer shaft
integrally with the valve opening control device in order to measure the rotation of
such device. The signal picked up should be sent to a measuring channel CEMB /T7 units
for processing.
PRINCIPLE OF OPERATION
Transformer T7-LVDT/120 allows transforming the rotational movement of the valve
control device into a linear movement measured by a magnetic core which is displaced
within a fixed coil in the transducer body. The coil has one primary winding and two
secondary windings connected in opposing phase; the output signal (secondary winding)
is proportional to the mechanical displacement of the core and, therefore, to the angle
of rotation performed by the valve control device.