The ESR-Power Series is a purpose-engineered, single-phase power transformer designed exclusively for the demanding process of Electro-Slag Remelting (ESR). This advanced metallurgical technique is critical for producing ultra-high-quality metals. Our transformer delivers the precise, stable, and finely-controlled low-voltage, high-current output required to melt and refine specialty alloys, ensuring exceptional purity and consistency in the final ingot for aerospace, energy, and advanced engineering applications.
Product Features
• Optimized for the ESR Process
Specifically designed for the unique electrical profile of ESR, which transitions from a brief initial arcing phase to a stable, essentially arc-free resistive melting process. This requires and delivers exceptionally stable current output.
• Precise & Stable Low-Voltage Output
Engineered to provide low no-load voltage and low impedance voltage, which are crucial for maintaining a stable slag pool and ensuring consistent, high-quality metal refinement throughout the long remelting cycle.
• Flexible & Fine Voltage Regulation
Offers multiple, finely-stepped voltage levels on the low-voltage side to precisely control the melting rate and thermal conditions within the furnace. Available with various tap-changing solutions to match operational preferences.
• Integrated, Compact Design
Unlike arc furnace setups, the ESR process does not require a separate external reactance. This transformer is designed as a self-contained unit without an additional series reactor, simplifying the system layout and improving efficiency.
• Robust & Reliable Construction
Built to withstand the continuous, high-current demands of industrial remelting operations, ensuring maximum uptime and durability in foundry environments.
Specifications & Parameters
| Category | Specification / Description |
| Application | Power supply for Electro-Slag Remelting (ESR) Furnaces. |
| Phase |
Single-Phase (Standard for ESR applications). |
| Primary Voltage | Customizable to match local grid supply (e.g., 10kV, 35kV). |
| Secondary Voltage | Low Voltage with multiple, finely-graded steps (Customizable per process). |
| Key Electrical Design | Low No-Load Voltage and Low Impedance Voltage. |
| Tap Changer / Regulation | Option 1: Off-Circuit Tap Changer (OCTC) Option 2: On-Load Tap Changer (OLTC) All regulation is performed via switches on the high-voltage winding. |
| Cooling Method | Typically Oil-Immersed (ONAF/OFAF) for effective cooling under high continuous load. |
Packaging, Warranty & Certifications Packaging：
The transformer is prepared for heavy industrial shipping. It is securely mounted on a robust steel skid base. The tank is sealed and filled with dry air or nitrogen. All external fittings are protected, and detachable components are crated separately for secure transit.
Warranty：
We offer a standard 12-month warranty from the date of successful commissioning or 18 months from the date of shipment, whichever occurs first. The warranty covers defects in materials and workmanship.
Certifications & Testing：
Our manufacturing process follows a certified quality management system. The transformer is designed and tested according to relevant international (IEC) and national (GB) standards for special application transformers. Each unit undergoes comprehensive routine testing, including ratio, resistance, impedance, and loss measurements, as well as dielectric tests. Special tests can be performed as required.
