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The ZX7 Series Inverter Manual Direct Current (DC) Arc Welding Power Source is a premium, heavy-duty SMAW (Shielded Metal Arc Welding / MMA) machine engineered for extreme industrial environments. Utilizing advanced solid-state inverter technology, this power source delivers an exceptionally stable welding arc, minimal spatter, and superior metallurgical weld quality.
Built for heavy structural engineering, shipbuilding, pipeline construction, and site erection, the ZX7 series fully complies with national Level 2 Energy Efficiency standards. It is optimized to perform continuous, high-intensity manual stick welding, making it an indispensable asset for large-scale infrastructure and Pre-Engineered Building (PEB) fabrication yards globally.
Engineering Advantages & Core Features
100-Meter Long-Distance Welding Capability: Specifically engineered for massive jobsites. The advanced internal compensation circuitry ensures that even when using ultra-long output welding cables (up to 100 meters), the welding current remains perfectly stable with negligible voltage drop or attenuation.
Intelligent Arc-Force & Hot-Start Control: Features an adjustable arc force and automatic hot-start system. This significantly improves arc ignition success rates, prevents the welding electrode from sticking to the base metal, and ensures smooth, continuous penetration from the very first strike.
Uncompromising Safety with VRD Function: Safety is paramount in industrial operations. The integrated VRD (Voltage Reduction Device) automatically lowers the open-circuit voltage (OCV) to a safe range when the machine is idle, drastically reducing the risk of Electrical Hazard for operators working in damp, high-altitude, or confined spaces.
60% Industrial Duty Cycle: Boasting a certified 60% rated duty cycle under maximum current output, this welding power source easily handles prolonged, heavy-duty welding arcs without thermal tripping.
Digital Synergy Panel: Equipped with a high-visibility digital display panel that allows welding engineers to preset, fine-tune, and accurately monitor real-time welding currents and parameters.
Comprehensive Environmental Protection: Features built-in smart circuits that actively safeguard the internal components against over-current, over-heating, under-voltage, and phase loss.
Technical Specifications
Industrial Parameters
ZX7-400
ZX7-500
ZX7-630
Input Voltage / Frequency
3-Phase 380V, 50Hz/60Hz
3-Phase 380V, 50Hz/60Hz
3-Phase 380V, 50Hz/60Hz
Rated Input Capacity
17.4 KVA
24.7 KVA
33.7 KVA
Welding Current Range
30 - 400 A
30 - 500 A
40 - 630 A
Rated Output Voltage
36 V
40 V
44 V
Rated Duty Cycle (40°C)
60%
60%
60%
Open Circuit Voltage (OCV)
72 V
74 V
76 V
Efficiency Factor
Level 2 Energy Saving
Level 2 Energy Saving
Level 2 Energy Saving
Cooling Method
Forced Air Cooling
Forced Air Cooling
Forced Air Cooling
Enclosure Protection Rating
IP21
IP21
IP21
Dimensions (mm)
620 x 300 x 510
620 x 300 x 510
620 x 300 x 510
Net Weight
39 kg
41 kg
43 kg
Primary Industrial Applications
Thanks to its rugged design and stable current feedback, the ZX7 series is widely utilized across heavy B2B sectors:
Heavy Steel Structure & PEB Plant Erection
Cross-Country Oil & Gas Pipeline Welding
Shipbuilding, Drydock Repairs, and Marine Engineering
Power Plant Boiler and Pressure Vessel Fabrication
Frequently Asked Questions
Q1: Will the welding quality drop if I extend the output cable to 100 meters on a jobsite?
A1: No. The ZX7 series is uniquely engineered with a powerful internal voltage-drop compensation system. It dynamically adjusts the internal output to ensure that the actual welding current at the end of a 100-meter cable remains perfectly consistent with your digital pre-set value.
Q2: What is the purpose of the VRD switch on the front panel?
A2: VRD stands for Voltage Reduction Device. When enabled, it reduces the idle open-circuit voltage to a safe level (typically under 24V) when the welder is not actively striking an arc. This acts as a vital anti-shock safety insurance for your welding staff, especially when working in humid or hazardous outdoor construction fields.
Q3: Can the ZX7 welding power source run continuously for heavy structural steel work?
A3: Absolutely. With a heavy-duty 60% rated industrial duty cycle and a robust forced-air cooling system, the ZX7-500 and ZX7-630 models can run continuous thick-diameter electrode welding operations (such as 4.0mm or 5.0mm rods) without overheating.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Year Established:
2018
Total Annual:
1000000-1500000
Employee Number:
70~150
Ecer Certification：
Verified Supplier
Sichuan Shunyao Supply Chain Management Co., Ltd.
Sichuan Shunyao Supply Chain Management Co., Ltd. is a leading provider of integrated steel structure solutions and construction support systems. Headquartered in China, we operate globally, specializing in the supply, project management, and tec...
Sichuan Shunyao Supply Chain Management Co., Ltd.
Sichuan Shunyao Supply Chain Management Co., Ltd. is a leading provider of integrated steel structure solutions and construction support systems. Headquartered in China, we operate globally, specializing in the supply, project management, and tec...
