Rocker Arm: ND Rocker Arm Spot Welder

  • New Design Featuring Welded Steel Frame
  • Provides 50KVA rating over entire range of the machine, with no transformer tap switch
  • Construction Features
  • Rugged Welded Steel Frame
  • SCR contactor
  • Transformer Available in 50 KVA
  • Standard Throat Dept of 24 “
  • Standard Features
  • 2 1/2” diameter upper and lower copper horns
  • Hooded single stage foot switch
  • Air Exhaust muffler
  • Airline lubricator and strainer
  • Transformer, 50KVA ant 50% duty cycle, operating at either 440/550 volts
  • Water cooled upper and lower electrode holders,
    1” diameter by 8” long
THROAT DEPTH, Inches 12"   24"     36"  
MACHINE SIZE IN KVA RATING   30 kva 30 kva 50 kva 75 kva 30 kva 50 kva 75 kva
Secondary Volts Max. Parallel 6.57 6.57 8.84 10.45 6.57 8.84 10.45
Min. Series 2.58 2.58 3.53 4.18   3.53 4.18
Secondary Amps, S.C. ± 10% Max. Parallel 25,900 18,800 25,300 29,900 14,800 20,000 23,500
Min. Series 10,100 7,400 10,000 11,900   7,900 9,400
Demand KVA, S.C. Max. Parallel 163 118 214 299 93 168 236
Duty Cycle, S.C. Max. Parallel 1.6 2.9 2.5 2.9   4 4.7
Power Factor, S.C. Percent 31 26 25 25 23 21 21
Primary Amps, Maximum 230 Volts 742 537 976 1   765 1
 
460 Volts 371 269 488 680   383 538
575 Volts 297 213 389 543   307 427
SCR Contactor 2 Amperes 230 Volts 300 300 600 1 300 300 1
460 Volts 150 150 300 600   150 300
575 Volts 150 150 300 600   150 300
Circuit Breaker Amperes 230 Volts 100 100 225 250 100 225 250
460 Volts 50 50 100 150   100 150
575 Volts 50 50 100 100   100 100
Line Fuse Rating, Amperes 230 Volts 100 100 150 225 100 150 225
460 Volts 603 603 100 125   100 125
  575 Volts 503 503 100 100 503 100 100
Cable Size, 5% Drop, 5% Duty Cycle 230 Volts 0 0 0 1   0 1
 
for Cable Run not over 100 ft. 460 Volts 4 4 2 0   2 1
90°C Hypalon or Equal 575 Volts 6 6 2 2   2 2

1 - 230 Volts is not recommended for 75 kva machines. Tap switch becomes overloaded at maximum settings.
2 - The size of SCR contactors is the minimum size required. Larger size may be used.
3 - Fuse size is based on buss fuse type LPS. Size of fuse is based on Gould Shawmut fuse type A4BX except where noted.
Rocker Arm