UB25 LINEAR DC RESISTANCE WELDING CONTROL
990-665
A-1
APPENDIX A
TECHNICAL SPECIFICATIONS
General
The UB25 is a linear DC resistance welding power supply that sends energy directly into a weld without
the use of a welding transformer. It is capable of executing any weld function at low current, voltage or
power levels with high stability and good control.
Note:
The specifications listed in this Appendix may be changed without notice.
DESCRIPTION
VALUE
NOTES
Input Line Voltage
(1 phase)
Model UB25/115
Model UB25/230
Standard nominal voltages
115 VAC, 15 A
230 VAC, 10 A
Line Voltage Tolerance
(referred to nominal)
115 + 15% / -10%
230 + 15% / -10%
All functions perform normally
All functions perform normally
Input kVA
(max demand)
UB25:
1.5 kVA
UB25/230:
1.5 kVA
To be used for sizing ac input power
service
Output Capability
(max available to load)
Based on load
See Appendix G, Repetition Rates
Output Current/Steps
(Programmable)
0.005 – 1.000 kA
1 A steps
Actual achievable output based on load.
See Appendix G, Repetition Rates
Output Voltage/Steps
(Programmable)
0.100 – 4.90 V
1 mV steps
Actual achievable output based on load.
See Appendix G, Repetition Rates
Output Power/Steps
(Programmable)
0.050 – 4.9 kW
1 W steps
Actual achievable output based on load.
See Appendix G, Repetition Rates
Weld Periods
0 – 99 ms
For each of the upslope, downslope and
weld periods in each of the two dual
pulses.
Duty Cycle
Based on load
See Appendix G, Repetition Rates
Weld Control
(Average values are regulated)
Weld Current, Voltage, or Power with
simultaneous limits on one unregulated
parameter
Weld Control Ripple
(At power line frequency)
2% of energy setting, peak to peak
Worst case
