Description
The TECNA 3066Q is a 90 kVA (50% duty) MFDC inverter c-type suspended weld gun with air-operated actuation, fed from a three-phase supply. Medium-frequency DC delivers stable, low-distortion welds with reduced power draw versus single-phase AC. It produces a maximum welding current of 30,000 amps and up to 1,393 lbs of electrode force (620 daN at 8 bar, single-stage cylinder).
Features
- 90 kVA @ 50% (142 kVA @ 20%) MFDC inverter with water-cooled secondary; max welding power 270 kVA.
- Medium-frequency DC output for consistent welds on coated and dissimilar materials with lower mains demand.
- Gyro suspension on sealed bearings with rotation lock for accurate maneuverability with a TECNA balancer.
- Electrode force 1,393 lbs (620 daN) at 8 bar, or 1,045 lbs (465 daN) at 6 bar (single-stage cylinder).
- Adjustable working stroke 0.20–1.18 in. (5–30 mm) plus temporary extra stroke; max stroke 2.95–3.94 in. (75–100 mm).
- Fully water-cooled copper secondary; lube-free chromium-plated cylinder and shaft; cooling-circuit valves for easy electrode changes.
- Recommended balancer: TECNA 9413.
Installation Requirements
- US stock supply: 480 V / 60 Hz three-phase (400 V / 50 Hz on request).
- Delayed fuses 100 A; cable section 0.05 in² (35 mm²) at L=30 m.
- Compressed air: 116 psi (8 bar). Water cooling: 127 gal/h (480 l/h).
- Net weight 139 lbs (63 kg) with cables, hoses, and suspension, without arms.



