Mains Operating Voltage; Mains Lead; Installation - TTI TG550 Manual De Instrucciones

Mains Operating Voltage

The operating voltage of the instrument is shown on the rear panel. Should it be necessary to
change the operating voltage from 230V to 115V or vice-versa, proceed as follows:
1. Disconnect the instrument from all voltage sources.
2. Remove the 4 screws which hold the upper and lower case halves together and lift off the
case lower.
3. Remove the 6 screws securing the main pcb to the case upper and lift the pcb free,
complete with front and rear panels.
4. Change the appropriate zero-ohm links beside the transformer on the pcb:
5. Refit the pcb to the case upper, ensuring all connections (especially safety earth) are
remade as before, and refit the case lower.
6. To comply with safety standard requirements the operating voltage marked on the rear
panel must be changed to clearly show the new voltage setting.
7. Change the fuse to suit the new operating voltage, see below.
Fuse
The correct time-lag fuse must be fitted for the selected operating voltage.
Make sure that only fuses with the required rated current and of the specified type are used for
replacement. The use of makeshift fuses and the short-circuiting of fuse holders are prohibited.

Mains Lead

When a three core mains lead with bare ends is provided it should be connected as follows:
Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited.
Link LK2 only for 230V operation
Link LK1 and LK3 only for 115V operation
For 230V operation use 125mA (T) 250V HBC.
For 115V operation use 250mA (T) 250V HBC.
Brown
Blue
Green/Yellow
WARNING! THIS INSTRUMENT MUST BE EARTHED
- Mains live
- Mains Neutral
- Earth

Installation

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