PRODUCT PURPOSE
The CV Adapter can be connected to certain variable voltage water-cooled engine welders to provide con- stant voltage output recommended for welding .068 and .072 NR-232, .068 and 5/64 NR-211, 5/64 NS-3M, Innershield electrodes within the current rating of the machine used. The unit can also be used for some other open arc processes depending on the application and process to be used. With the CV Adapter installed, the welder can be easily set to operate in either the CV mode or the standard VV mode.
Three models have been available, one for SA-200 and SA- 250 welders, one for SAE-300, SAE-400 and SAE-400 WELD’N AIR engine welders and one for SAE-350 engine welders.
The LN-15, LN-22 and LN-25 wire feeder is recom- mended for Innershield welding with the CV Adapter because no terminal strip is provided for wire feeder control wires, and there is no output contactor. (The K279 contactor voltage control option cannot be used with the LN-15,LN-22, OR LN-25 in this application.) An LN-7 can be used with an SA-250, SAE-350, SAE- 300, SAE-400 or SAE-400 WELD’N AIR that has AC auxiliary power provided a K240 Contactor Kit is con- nected between the LN-7 and the power source.
The voltage control range of the CV Adapter is 15 to 35 volts at the welder current rating. The table gives a summary of CV outputs when the Adapter is connect- ed.
| | Max. Output At | |
| Rating At 60% | 35% Duty | |
Machine | Duty Cycle | Cycle | Comments |
SA-200 | 200 amp | 250 amp | Many procedures |
| at 35V | at 30V | limited by |
| | | current rating |
SA-250 | 250 amp | 310 amp | AC auxiliary power |
| at 35V | at 35V | is reduced 25% |
| | | when in CV mode |
SAE-300 | 300 amp | 375 amp | Polarity switch |
| at 35V | at 35V | is disconnected |
SAE-400 & | 400 amp | 500 amp | Polarity switch |
SAE-400 | at 35V | at 35V | is disconnected |
WELD’N AIR | | | |
SAE-350 | 350 amp | 435 amp | No polarity switch |
| at 35V | at 35V | installed |
| | | |
Inter- | | | AC auxiliary power |
national | | | is reduced |
350-SA | — | 310 amp | 25% when in CV |
| | at 35V | mode |
450-SAE | — | 435 amp | No polarity switch |
| | at 35V | installed |
| | | |
NOTE: WHEN ENGINE WELDER IS SUPPLIED WITH A METER, THE AMMETER DOES NOT WORK WHEN WELDING IN THE CV MODE.
The CV Adapter will fit any of the following engine welders:
•SA-200 with electronic idler and FDW DC exciter (above Code 7240)
•Classic I and II (Below Code 10066)
•SA-250 above Code 7826 and Below code 10066.
•SAE-300 and SAE-400 without Remote Control option and with 115V FDW DC exciter, 254 alterna- tor exciter, or 214 alternator exciter (above Code 7160) and all SAE-400 WELD’N AIR— NOTE: K-385 CV Adapter below Code 8785 will not operate prop- erly on SAE engine welders above Code 8812.
•SAE-350 — Factory installed only.
•International
350-SA —(Below Code 10066) All machines or fac- tory installed.
450-SAE — Factory installed only.
Estimated time for field installation of the CV Adapter to welder is 2 to 3 hours.
