Tweco 550i Transmig - Manual (Page 31)

TRANSMIG 350i, 450i, 550i
Manual 0-5205 3-11 INSTALLATION, OPERATION AND SETUP
16. Fan as Needed
The TRANSMIG 350i, 450i and 550i are fitted with a fan as needed feature. Fan as needed automatically
switches the cooling fan off when it is not required. This has two main advantages; (1) to minimize power
consumption, and (2) to minimise the amount of contaminants such as dust that are drawn into the power
source.
Note that the fan will only operate when required for cooling purposes and will automatically switch off
when not required.
17. Main Three Phase Power On / Off Switch
This Three Phase circuit breaker performs a dual function.
It is used to turn the unit on/off and it will also trip in the event of a major fault condition.
Lift the cover for access to the circuit breaker.
!
WARNING
When the front digital displays are lit, the machine is connected to the Mains supply voltage and
the internal electrical components are at Mains voltage potential
18. Positive Welding Terminal
Welding current flows from the Power Source via heavy duty bayonet type terminals. It is essential, how-
ever, that the male plug is inserted and turned securely to achieve a sound electrical connection.
19. Negative Welding Terminal
Welding current flows from the Power Source via heavy duty bayonet type terminals. It is essential, how-
ever, that the male plug is inserted and turned securely to achieve a sound electrical connection.
CAUTION
Loose welding terminal connections can cause overheating and result in the male plug being fused
in the terminal.