Vaisala Optimus OPT100 - Page 61

2. Clearly mark the disconnection device as the disconnection device for the OPT100
Optimus DGA Monitor.
3. Make sure the external disconnection device is turned o. If possible, lock it in the o
position.
4. Run the AC or DC cable between the external disconnection device and the power supply
unit of the DGA monitor.
5. Connect the AC or DC cable to the external disconnection device.
6. Open the cable gland marked AC in or DC in on the power supply unit. Remove the plug
and store it for later use.
7. Prepare the cable for connection to the power supply unit:
a. Strip 14 cm (5.51 in) of the cable to expose the wires.
b. Cut o 2 cm (0.79 in) of the line and neutral wires (brown and blue). Leave the green
and yellow grounding wire 14 cm (5.51 in) long.
Make sure that the grounding wire is longer than the line
and neutral wires. Under mechanical stress, the grounding wire must be
the last to disconnect from the protective ground terminal.
CAUTION!
c. Strip the ends of the individual wires to expose the conductors for 1 cm (0.4 in).
8. Insert the cable through the outer nut and the inner seal.
9. Start inserting the cable through the cable gland, and stop when the unstripped cable is
visible through the gland.
Chapter 4 – Electrical installation
61