WILLETT 430 - Mains Input Circuit

Technical Description: Electronics Modules
Issue 2
79
Part No. 306-0430-102
Mains Input Circuit
The AC mains supply (Figure 31) is supplied, via three core cable to the mains connector on the connector
panel. At the mains connector the live and neutral lines are fed to the On/Off switch via a filter, the earth line is
connected directly to an earth lug on the PSU. The output from the On/Off switch is fed to connector TB1 on the
PSU via fuses 1 and 2. Fuse ratings are 3.15 A for a 220/240 V supply and 5 A for a 110 V supply.
N
L
TB1
PSU
F1
F2
N
L
E
Figure 31 Mains Input Circuit
The live and neutral lines are protected by separate fuses.