APPENDIX A: TECHNICAL SPECIFICATIONS
875DP/500DP/500HV DUAL PULSE
RESISTANCE WELDING
POWER SUPPLIES
A-4
990-290
Table A-2. Welding Speed
6000
μ
F Capacitor Bank
10500
μ
F Capacitor Bank
Percent Full Energy
Rep Rate
(welds/min)
Hit Rate
(welds/min)
Rep Rate
(welds/min)
Hit Rate
(welds/min)
under 2%
240
166
170
116
10%
166 143 113
116
25%
118
109
80
78
50%
82 71 55
51
75%
60 56 40
36
100%
40 42 30
27
Conditions: 25
q
C Ambient, Nominal Line Voltage, 60 Hz.
In dual pulse operation, the repetition rate or hit rate for each individual pulse may be calculated as follows:
RR
1
= First Pulse Rep Rate (Hit Rate)
RR
2
= Second Pulse Rep Rate (Hit Rate)
Calculate RR
(1+2),
Rep Rate (Hit Rate) for dual pulse operation.
(RR
1
) (RR
2
)
RR
(1+2)
=
RR
1
+ RR
2
For example, if wired for the 10,500
μ
F Capacitor Bank, the energy level of Pulse 1 is 25% and Pulse 2 is
75%, the repetition rate for the dual pulse weld would be:
(80) (40)
RR
(1+2)
= = 26.7 welds/min.
80 + 40