Rectifier Transformer (English Version)

Rectifier transformers are special transformers designed specifically for rectifier power supply in mines. Their core function is to convert industrial-frequency AC power into DC power. The products are manufactured in strict accordance with national and industrial standards such as GB/T 1094.11 and JB/T 3837, and have obtained KY/KA mine product safety certification.

They are suitable for power supply in non-explosive hazardous areas underground and for ground rectifier equipment (such as mine electrolysis, electroplating, and DC drive devices). They combine high rectification efficiency, strong harmonic resistance, and excellent adaptability to harsh mine conditions, providing stable and efficient DC power support for mine DC power equipment and electrochemical operations.

1. Core Performance Parameters(Customizable)

Rated Voltage and Capacity

Main high-voltage inputs: 6kV, 10kV; custom voltages including 3kV, 110kV available.

Low-voltage AC outputs: 380V, 660V, 1140V for rectifier modules.

DC outputs: customizable from 100V to 1000V.

Rated capacity: 50kVA ~ 2000kVA, covering all mine rectification applications.

Rectification Performance

Optimized rectifier winding structure, compatible with half-wave, full-wave, and bridge rectification.

Rectification efficiency: ≥ 98.5%.

Output ripple factor: ≤ 3%.

Special winding transposition reduces harmonic loss and grid pollution.

Insulation Class and Performance

Standard insulation classes: Class F (155℃), Class H (180℃); Class C available for high-temperature, high-humidity underground environments.

Insulation materials: high-grade insulating oil, epoxy resin, DuPont NOMEX® paper.

Stable insulation performance even at relative humidity ≥ 95% with condensation.

Overload and Impact Resistance

• 1.5 × rated load: continuous operation for 6 hours

• 1.75 × rated load: continuous operation for 3 hours

• 2.0 × rated load: continuous operation for 1 hour

  Strong short-circuit and harmonic impact resistance for rectifier load fluctuations.

Cooling and Temperature Rise Control

Oil-immersed: ONAN / ONAF with enlarged corrugated tank and radiators.

Dry-type: AN / AF with intelligent low-noise temperature-controlled fans.

Effectively controls temperature rise and avoids insulation aging.

Protection Degree and Safety

Enclosed metal enclosure.

Outdoor: IP54; underground: enhanced dustproof, moistureproof, splash‑proof structure.

No live exposed parts to prevent electric shock.

Noise and Anti‑Interference

Dry-type noise: ≤ 55 dB; oil-immersed noise: ≤ 60 dB.

Excellent harmonic and unbalanced load immunity, ensuring stable rectifier output.

2. Structural Design & Core Materials

• Iron Core: Low-loss oriented silicon steel, optimized for harmonic resistance, with shock‑absorbing pads.

• Rectifier Windings: Oxygen‑free copper, special transposition winding, low harmonic loss, high short‑circuit strength.

• Tank / Enclosure: Fully sealed corrugated oil tank (oil type); flameproof, dustproof, corrosion‑resistant steel (dry type).

• Shockproof Structure: Reinforced fixing, damping pads, skid base and lifting lugs for mine transportation and installation.

• Protection & Accessories: Overload, short-circuit, over/under-voltage, leakage protection; oil temperature, winding temperature monitoring; optional harmonic suppression, remote monitoring.

3. Core Product Advantages

• High rectification efficiency, low ripple, stable DC output, low harmonic pollution.

• Certified for mining use (KY/KA), fully enclosed, safe for underground non‑hazardous areas.

• Wide temperature range: -20℃ ~ +40℃, high humidity, dust, vibration resistant.

• Strong overload and impact capacity, ensuring continuous production.

• Low loss, Level 1 energy efficiency, energy-saving, long service life (over 30 years).

• Compact, easy to transport, install and maintain; low operation cost.

• Fully customizable: voltage, capacity, rectifier topology, cooling, protection, monitoring.

4. Typical Applications

• Underground rectifier power supply for DC fans, pumps, conveyors, electrolysis, lighting.

• Ground rectifier systems for electrolysis, electroplating, DC drives.

• Mine emergency DC power, control systems, communication equipment.

• Tunnel, metallurgy, chemical and other harsh industrial environments.

5. Specifications & Customization

• Voltage: 3kV, 6kV, 10kV, 110kV; DC 100V–1000V.

• Capacity: 50kVA–2000kVA.

• Type: oil-immersed, dry-type (flameproof).

• Cooling: ONAN, ONAF, AN, AF.

• Protection: IP54, IP65.

• Custom: rectifier parameters, overload capacity, anti-vibration, anti-corrosion, intelligent monitoring.