SIMEAS-T - Transducer with auxiliary power
18
Notes for the fuses to be used:
For devices that are supplied with AC auxiliary energy, a 100 mA time-lag fuse
according to IEC 60127-2 must be connected upstream in the control cabinet
installation.
Appropriate protection must be provided for the measuring circuits during the
installation:
•
Current measuring circuits: the fuse must prevent the values presented in the
table
6 Technical specifications
from being exceeded.
•
Voltage measuring circuits: the fuse must limit the current to 100 mA,
be suitably arranged and be easily accessible to the user.
10.3 Installation material
Measuring circuits: The connection of the measuring circuit must be made with
cables that have demonstrated double isolation for the highest voltage occurring in
the measuring circuit.
Secondary circuits: For devices in which the highest voltage of the measuring circuit
is 500 V, cables with basic isolation in relation to the maximum voltage in each
secondary circuit suffice.
For devices with voltages that exceed 500 V in the measuring circuit, the isolation of
the cable in the secondary circuits must correspond to a basic isolation for the
highest voltage occurring in the measuring circuit.
11 Commissioning
First ensure that the operating data matches the values on the rating plate. No
changes may be made on the transducer. After a warm-up time of 15 minutes, the
transducer is ready for operation and keeps within the error limits.
•
Measurement option for the output current and load voltage. Before
connecting an ammeter to the output side of the transducer, the auxiliary
power should be switched off because the voltage at terminals 31 and 32 rises
to a maximum of 30 V DC during the interruption of the output current I
A
.
•
Measurement of the output current (output signal I
A
): Disconnect the line
from terminal 31(+) or 32(-), and connect the ammeter in series there.
Measurement of the load voltage (output signal I
A
), or the output signal U
A
:
Connect voltmeter to terminals 31(+) and 32(-).
12 Maintenance
The output signal can be tested in a laboratory six months after commissioning and
subsequently every two years (section "Calibrating and testing"). The device has to be
opened for this. Apart from that, the transducer requires no maintenance.
WARNING!
The device contains no fuses to be changed by the user.
