ESAB Powercut 1600 Service Manual page 28

SECTION 4
4.2.1 Axial fan (951182)
The side mounted fan M1 is used to circulate cooling air across the active devices, (the IGBTs, IBR and
D101 and D102) inside the cabinet. The fan starts when the torch trigger is depressed and will continue to
run for up to seven minutes after the cut has ceased. There is a variable timing circuit at work here. The
timing circuit will keep the fan running for the same amount of time the torch was cutting. In other words,
if the torch was turned on for two minutes, the fan will continue to run for two minutes after the torch was
turned off. This 1:1 ratio will work up to a maximum of seven minutes. The maximum fan on time is seven
minutes after the torch is turned off.
4.2
The fan input power wire is connected on one
side to the 230-volt primary at the T2 trans-
former, and the other wire is connected to
the power board PCB2 at J2. The J2 connec-
tion is routed to the Fan relay, RL2, for ac-
vation from the main control board PCB1. The 230
volt AC power connection is completed through the
contacts of RL2, to J42
Testing:
Open circuit resistance is 150 Ohms.
Specifications:
5.9 DIA. x 2.16 In., 247.2 CFM
230V 60Hz/ 55dB(A)/ -40 ~ +55°C
Metal housing and impeller
Shaded pole motor, air output over struts
Elec. connection via 2 leads AWG 18, 14 in. (365
mm) from outer edge of housing.
Mass = 38.8 oz (1100g)
AC AXIAL FAN
5.9 DIA. x 2.16 In., 247.2 CFM
230V 60Hz/ 55dB(A)/ -40 ~ +55°C
Metal housing and impeller. Shaded pole motor, air output over struts.
Elec. connection via 2 leads AWG 18, 14 in. (365 mm) from outer edge of housing.
Mass = 38.8 oz (1100 g).
2.1875
6.375
5.875 OD
DESCRIPTION Of OPERATION
0 100
.6
in. H O
2
.5
.4
.3
.2
6.75
.1
0
0 50
28
200 300 400
500 m3/hr
60 Hz
50 Hz
100 150 200 250 300 CFM
ti-
150
Pa
100
50
0