Proven thyristor reliability at a lower capital cost. Ideal for foundries needing robust, serviceable power supply technology with straightforward maintenance.
IGBT power supplies offer better efficiency but higher initial cost. For smaller foundries or budget-sensitive projects, SCR technology offers a proven, lower-cost entry point.
Thyristors (SCRs) are large, robust components that can be individually tested and replaced by a local electrician. No specialized IGBT driver knowledge required.
Many foundries have established SCR-based infrastructure. Replacing like-for-like minimizes re-wiring and operator retraining costs.
In regions where IGBT technical support is limited, SCR technology offers the advantage of simpler diagnostics and wider local availability of thyristor components.
The YuRun SCR Medium Frequency Power Supply uses proven thyristor (SCR) technology to deliver reliable induction power for melting applications. While IGBT technology offers superior energy efficiency, the SCR power supply remains the industry standard in many foundries due to its lower initial cost, straightforward maintenance, and robust construction that tolerates harsh foundry environments.
Our SCR systems use high-quality thyristors from reputable manufacturers and feature comprehensive protection circuits including overcurrent protection, water-flow interlocks, and phase-loss detection. Available from 100kW to 5000kW, these units are engineered for 24/7 continuous duty in demanding steel, iron, and copper melting operations.
SCR power supplies have a 20–30% lower purchase price than equivalent IGBT systems — a significant advantage for budget-sensitive projects or smaller foundries evaluating their first induction furnace investment.
Individual thyristor modules are large, clearly labeled, and can be tested with a standard multimeter. Replacement requires basic electrical knowledge — no specialized inverter driver expertise needed.
Thick steel enclosures, oversized bus bars, and robust heat sinks make SCR power supplies extremely tolerant of vibration, dust, and temperature extremes common in foundry environments.
Analog firing circuits are well-understood by electrical maintenance teams worldwide. Fault diagnosis is straightforward compared to digital IGBT gate driver systems.
Thyristors are a mature technology. Compatible replacement components are available from dozens of suppliers globally, minimizing lead times for critical spare parts.
An external power factor correction capacitor panel (sold separately) can improve power factor from 0.75–0.85 (standard) to 0.92–0.95, reducing utility reactive power penalties.
| Rated Power | 100kW / 160kW / 250kW / 350kW / 500kW / 750kW / 1000kW / 1500kW / 2000kW / 3000kW / 5000kW |
| Thyristor Technology | Double-group intermediate frequency inverter (series resonant or parallel resonant) |
| Working Frequency | 100–1000 Hz (fixed or adjustable per order) |
| Input Voltage | 380V / 660V / 10kV three-phase, 50/60Hz |
| Output Voltage | Adjustable 0–1000V DC (model dependent) |
| Power Factor (without compensation) | 0.75–0.85 |
| Power Factor (with compensation panel) | 0.92–0.95 |
| Control System | Analog control (standard) or Siemens/Mitsubishi PLC (optional) |
| Protection Functions | Overcurrent, overvoltage, under-voltage, overtemperature, water-flow loss, phase-loss |
| Cooling | Closed-loop water cooling |
| Enclosure | IP23 free-standing steel cabinet |
| Certification | CE / ISO 9001:2015 |
| Warranty | 12 months from installation |