ESAB ESP 600C Instalación Funcionamiento Y Mantenimiento página 63

SECTION 6
PCB2
CAUTION
3 2
Snubber Resistor
(ex. R9)
PCB3
2 3
Snubber Capacitor
2 3
(ex.C18)
Freewheeling Diode
(ex. D6)
Red Wire
ESP 400C and 600C Plasma Power Sources
4. Remove bus bars between capacitor banks,
IGBTs and freewheeling diodes.
View of freewheeling diodes and capacitor banks
with bus bars removed. (PCB2 and PCB3 are
shown still in place)
Failure To Route Leads Properly Can Lead To
Failure Of Freewheeling Diodes.
Dressing Of Freewheeling Diode Snubber
Leads.
Red wire of snubber resistor must be routed under
capacitor self lead. Red wire terminal must have a
minimum 1/8" clearance from the bus bar on diode
terminal #2.
Note: Bus bar connecting terminal no. 3 is not
shown for terminal clarity.
The red snubber leads are numbered as viewed
from the rear of the power source:
D1 - Left
D2 - Right
D3 - Left
Cover snubber capacitor self leads with sleeving
P/N 95193486
Troubleshooting
D4 - Right
D5 - Left
D6 - Right
6-17