Specifications

MedWeld 3000 Catalog Revision 8
July 2002 Page 20 of 72
Integrated Single-Phase Weld Control Enclosure Solution
The MedWeld 3005 system can be fully configured Welding Control Units (WCU) that is
immediately ready for use. It is available in several enclosures in various
configurations. There are various standard packages as shown from pages 12 to 16.
Should their need to be other customized integrated control packages, please call
Medar or its distributor.
Note on Current Monitoring for AC and 3-Phase to DC Controls:
The current transformer coil shown above and throughout this catalog is used on AC
and 3-Phase to DC controls. This device is suited for currents above 50 amperes. For
applications below this level, please consult with WTC and request for the document
entitled “Guidelines to Select a Sensor to Measure Welding Current”.
Seam Welding with Integrated Enclosures
WTC welding controls provide a load resistor across the welding transformer. This
resistor assures proper SCR firing and transient voltage suppression under all operating
conditions.
The load resistor supplied as standard equipment is designed for spot welding or short
duration seam welding use with a maximum
weld time of 5 seconds and a maximum duty
cycle of 33%. If your welding application involves weld times longer than 5 seconds per
weld or an overall duty cycle exceeding 33%, a larger load resistor is required. Please
contact the factory or your sales representative to obtain the correct load resistor for
your application.