Thyristor Technology, Water-Cooled

Application
Water-cooled thyristor technology is used in numerous electrochemical processes and is particularly suitable for power-intensive applications. Typical areas of application include aluminum anodizing, electrolytic brightening, electrolysis, and strip finishing lines. Thyristor power supplies also excel in galvanotechnical high-current processes and pulse applications through precision and reliability.

Product Description
In high-current technology, water-cooled thyristor technology has proven to be particularly efficient. The use of water as a cooling medium enables high power densities and compact designs. The proven technology offers wear-free power adjustment as well as dynamic and stable process sequences.
Our thyristor power supply systems can be flexibly integrated into a wide variety of system concepts and are available in different cooling variants: including water-cooled, air-cooled, as well as synthetically cooled and combined designs. This provides maximum adaptability for demanding industrial applications.

Customer Benefits
In the medium power range ≥ 2,000 A, thyristor technology is frequently used. Easy to handle, robust in harsh industrial environments, and straightforward to service, this technology enjoys high confidence.

Interfaces

Analog interface: 0 – 10 VDC, 4 – 20 mA (optional)
Profibus DP
ProfiNET etc.

Technical data

Mains voltage: 3 x 400 V / 50 Hz + N + PE (+ all common mains voltages or 60 Hz)

Output current: 1,000 A – 100,000 A

Output voltage: 6 V – 900 V

Residual ripple (standard): approx. 5% at full modulation

Residual ripple (option): 2 – 3% at full modulation

Duty cycle: 100% (24/7)

Efficiency: 80% – 93%

Ambient temperature: +35°C, +40°C (option)

Cooling: Water

Water inlet temperature: +16°C – +35°C

Degree of protection: IP 54

FAQ

What is a MUNK GmbH thyristor rectifier and what distinguishes it?

A MUNK GmbH thyristor rectifier is an industrial high-current and high-voltage device designed for demanding continuous processes. Transformer, power semiconductors, and control technology are integrated in an industrial cabinet that enables currents from approximately 2,000 A to 50,000 A and voltages up to 900 V. These devices are used in various electrochemical and thermal applications, including anodizing, hard chrome plating, melting and electrolysis processes, as well as hydrogen processes. Due to the temperature-stable thyristor technology, these rectifiers are particularly suitable for production areas where high ambient temperatures occur or thermally demanding processes take place.

Why does MUNK preferably offer water-cooled thyristor rectifiers?

Water-cooled rectifiers ensure uniform and efficient heat dissipation, allowing high currents and continuous loads to be operated safely. They enable more compact designs and stable internal temperatures, even in warm or chemically stressed production environments. In addition, air-cooled systems are available for maintenance-friendly applications, as well as oil-cooled variants for particularly high thermal requirements or extreme continuous load conditions.

What individual or process-specific solutions does MUNK offer?

MUNK GmbH develops thyristor rectifiers that can be precisely adapted to the respective process requirements. These include special voltages up to 900 V, high-current variants up to 50,000 A, customized cooling concepts, special control structures, and individual cabinet configurations. For example, MUNK implements dual rectifiers in which two separate rectifier units are operated in a common cabinet. Mechanical custom solutions, such as copper outputs via the device roof or rear top/rear bottom and even internally in the control cabinet, can also be implemented according to the system layout. These and many other custom solutions offer numerous possibilities.

What additional functions can be integrated into MUNK thyristor rectifiers?

Available functions include polarity reversal operation, pulse functions, time-programmable sequences, and industrial communication interfaces. For grid connection, 6-pulse and 12-pulse designs are available, with 12-pulse systems enabling more harmonious grid feedback. For sensitive processes, additional chokes can be used to reduce residual ripple.

Does MUNK GmbH also support older or third-party manufactured thyristor rectifiers?

Yes. Thanks to over 55 years of experience, MUNK has extensive expertise in the repair and modernization of rectifiers from various manufacturers. This includes replacement of power semiconductors, overhaul of transformers, modernization of controls, and complete retrofit projects. Spare parts or suitable alternative components can often be supplied.

Do you require individual consultation or

a solution tailored to your application?

Please feel free to contact us for a personal product inquiry.