1 Introduction Page 7
Stud welding unit operating manual Date: July 2021
ALPHA 850 07.2021 / EN Rev.: A
1.8 Technical data
Device designation/type: ALPHA 850 welding device
Version: Europe standard
Input voltage: 3 ~ 400 V (± 10%); others on request
Grid frequency: 50/60 Hz
Power fuse: per phase 35 A (at 400 V)
Connected load: 68 kVA
Output power: max. 36 kW
No-load voltage: 96 V
Duty cycle: 3%
Welding current range: 100 A – 850 A
Welding time range: Short cycle: 10 ms – 100 ms
Drawn arc: 100 ms – 1000 ms
Fuse elements:
Supply to PCB control: F1: 1 A/250 V (slow)
Supply 18 VAC: F2: 4 A/250 V (slow)
Supply to coil circuit: F3: 4 A/50 V (slow)
Fan: F4: 3.15 mA/250 V (slow)
Protection type: IP 23
Protection class: I
Storage temperature: -25°C to +55°C
Operating temperature: 0°C to +40°C
Cooling type: Fan (AF)
Relative humidity: 0% to 50% at 40°C
0% to 90% at 20°C
Dimensions (L x W x H): 555 mm × 335 mm × 415 mm
Weight: 64 kg
Power plug: CEE; (3L+PE)
Power connection cable: H07RN-F
Length: 3 m
Cable diameter: 4 × 6.0 mm
2
Minimum bending radius: 90mm
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