Name: 4810-916 Transformer | Genuine OTC Daihen Welding Power Source Part
Brand: OTC DAIHEN
SKU: 4810-916

OTC Daihen Genuine Main Transformer 4810-916

4810-916 is a genuine core main transformer engineered by OTC Daihen specifically for high-power MIG/MAG gas-shielded welding machines. Rejecting substandard copper-clad aluminum substitutes, this original transformer is constructed without compromise using premium cold-rolled silicon steel laminations and 100% high-purity virgin copper windings. Functioning as the core heart for energy transformation and electrical isolation within the power source, it offers superior electromagnetic efficiency and minimal thermal elevation. Even under demanding continuous heavy-duty welding cycles, it maintains rock-solid voltage stability, eliminating arc flutter, output fatigue, and downstream power semiconductor failures caused by transformer overheating.

OTC Daihen Genuine Transformer 4810-916 Front View — Figure 1: Front View of Genuine OTC 4810-916 Main Transformer (Pure Copper Windings Clearly Visible)

⚙️ Technical Specifications

Specification Attribute	Detailed Parameter
OEM Part Number	4810-916
Product Type	Welding Power Source Main Transformer (Voltage Conversion / Galvanic Isolation)
Core Material & Winding	High-grade cold-rolled silicon steel + 100% pure copper heavy-duty winding
Compatible Models	OTC High-Power Gas-Shielded Welding Machine Series (Refer to equipment manual)
Quality Guarantee	100% genuine pure-copper factory part; zero copper-clad aluminum substitutes

OTC Transformer 4810-916 Side Details — Figure 2: High-Density Silicon Steel Laminations and Insulation Layer on 4810-916

OTC Transformer 4810-916 Wiring Terminals — Figure 3: Heavy-Duty Wiring Terminals and High-Current Fasteners on 4810-916

🔧 Heavy-Duty Electrical Installation & Safety Guide (Essential Reading)

Prevent Handling & Physical Impact Damage: Main transformers are heavy. During transport and assembly, never drop, strike, or drag by the winding leads. Impact-induced silicon steel lamination misalignment or damaged varnish insulation will trigger catastrophic short-circuit failures upon power-up.
Terminal Torque & Contact Arc Prevention: Transformer busbars carry extreme operating amperage. Always clean off surface oxidation on copper terminals and secure bolts to specified torque values using a calibrated torque wrench. Loose connections generate high contact resistance and severe localized heating, risking insulation melt and fire.
Residual High-Voltage Warning: The main transformer connects directly to high-voltage rectifiers and filter capacitor banks. Always disconnect power and wait at least 10 minutes, verifying zero residual DC bus voltage with a multimeter before servicing.
Dust & Moisture Maintenance: Industrial fabrication workshop environments contain metallic grinding dust. Regularly blow out dust accumulation within winding crevices using dry compressed air to prevent moisture-induced tracking and insulation breakdown.