Bringing Power To The Instrument - ABB LWT300 series User Manual

WARNING
The terminal block needs to be replaced if the installation shows any sign of damage
resulting from direct or indirect lightning discharges. Call ABB in such situations.

Bringing power to the instrument

ELECTROSTATIC DISCHARGES
Electronic components are sensitive to electrostatic discharges.
Before performing any connection, operators shall make sure that they have discharged
all static electricity from their body before touching electronic components.
—
Figure 13 Typical LWT connection
WARNING
All connections must be established in a de-energized state. Before working on the
circuit, secure the breaker to prevent any accidental power-up.
In an explosion proof/flameproof installation, do not remove the covers while the
instrument is energized.
To bring power to the LWT instrument:
1 Remove the temporary plastic cap from the most convenient of the two electrical connection ports
(see Figure 14 on page 24).
WARNING
In the particular case of explosion proof installations, remove the temporary plastic
caps and close the unused opening with a cap certified and appropriately rated for
explosion containment.
2 Make sure that the M4 hex head locking screws are screwed in (see Figure 8).
3 Remove the housing cover on the "terminals" side (see Figure 14 on page 24).
23
Installing the LWT