The three phase oil immersed magnetic volatge regulator is a highly specialized, contactless and stepless voltage control device designed for demanding industrial heating and thermal processing applications. By combining a transformer and a saturable reactor into a single, robust oil-immersed unit, it enables precise, smooth voltage regulation from near-zero to rated output under full load. Serving as a key executive component in automated systems, it is ideal for applications requiring program-controlled or closed-loop temperature management, offering unparalleled reliability and control finesse over traditional mechanical tap-changers.
Product Features
• Contactless Stepless Regulation
Utilizes a saturable reactor core controlled by a small DC current to provide smooth, continuous output voltage adjustment without any mechanical contacts or moving parts. This ensures long service life, minimal maintenance, and high reliability.
• Inherent Current Limiting & Short-Circuit Protection
Features excellent "drooping" load characteristics. Under a short-circuit condition at the output terminals with rated input and DC control, the short-circuit current is limited to approximately 1.5 times the rated current, providing exceptional protection for both the regulator and the downstream load.
• Perfect for Automated Control Systems
Functions as a natural power actuator for automation. The output AC power is directly proportional to the input DC control signal (current or voltage), allowing for seamless integration into program-controlled or closed-loop automatic temperature control systems.
• Robust Oil-Immersed Construction
The oil-immersed design provides superior insulation, cooling, and protection for the core and windings, making it suitable for rugged industrial environments and ensuring stable, long-term operation.
Specifications & Parameters
| Category | Specification / Description |
| Model Code | T [Phase] H [Cooling] - [Design No.] - [kVA] / [Primary Voltage] Example: TDH2-200/0.5 |
| Model Breakdown |
T: Voltage Regulator; S/D: Three-Phase/Single-Phase; H: Magnetic; [Cooling]: Blank for Oil-Immersed, G for Dry-Type, SP for Water-Cooled; [Design No.]: e.g., 2; [kVA]: Rated Capacity; [Voltage]: Primary Voltage (kV). |
| Phase | Three-Phase (also available in Single-Phase). |
| Rated Capacity | Customizable (e.g., 200 kVA as in example TDH2-200/0.5). |
| Primary Voltage | Customizable (e.g., 0.5 kV as in example). |
| Regulation Principle | DC current control of saturable reactor impedance. Enables open-loop manual or closed-loop automatic control. |
| Key Characteristic | Load-based Regulation: Output voltage range is defined under rated load resistance. Not suitable for no-load or light-load voltage regulation, as the effective range becomes very narrow. |
| Short-Circuit Current | Limited to ~1.5 x Rated Current under specified conditions, providing inherent system protection. |
| Cooling Method | Oil-Immersed (ONAN). |
Packaging, Warranty & Certifications Packaging：
The unit is securely mounted on a heavy-duty skid base. The tank is sealed and filled with dry, inert gas or insulating oil for protection during transit. All external fittings are secured, and detachable components are individually packed. The entire assembly is protected against environmental damage during shipping.
Quality 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 quality system is certified. Products are designed and tested in accordance with relevant electrical standards. Each unit undergoes comprehensive routine tests, including turns ratio, winding resistance, no-load and load characteristic tests at various DC control levels, impedance measurement, and dielectric withstand tests.
