Head of Electronics Engineering: Jürgen Gaul

Let us introduce you: our electrical engineering department

Let us introduce to you: our electrical engineering department

In the following article, we are pleased to present you our electrical engineering department.
Our electrical engineering department is associated with the mechanical engineering and the development departments. The key tasks consist of the design development and improvement of the electro-technical parts for our Freeze-Drying Systems, Loading and Unloading Systems, Freeze-Thaw Units and Leak-Detection Systems of our affiliated company HOF Prüfsysteme GmbH. Another main task is to plan upgrades and maintenance of existing systems of HOF or of other manufacturers.

HOF employees create GMP and standard compliant circuit documents needed for the construction, qualification and documentation of systems. Specifically, plant overviews, wiring diagrams, terminal diagrams, cable diagrams and parts lists are issued. Inspection plans for VDE measurements (VDE=German Electrical Engineering Association) made on the equipment and inspection plans for safety technology resulting from the risk analysis are also created.

Safety systems for freeze dryers are developed in accordance with the current guidelines and in close collaboration with the public monitoring institutions.

HOF control systems are designed and constructed so that they are safe and reliable to avoid any dangerous situation. It must be pointed out that they withstand any service conditions and external effects.

In a risk analysis, each danger point is identified by HOF departments (kind of danger, probability and extent) with the objective that, for each risk, a performance level PLr (required level of safety function) is determined. All safety-related parts (electrical, hydraulic, pneumatic, mechanical) are considered, regardless of the technology and energy used.

Furthermore, all other risks resulting from the use in the drying of solvent based products (ATEX) or biologically active products which might have influence on the protection of people, environment, product and machine, are considered, case-by-case, and are implemented in a conceptual framework.

HOF systems are safe and reliable: these are decisive features which are repetitively tested and targeted.

Another important aspect is the efficient use of energy and its optimization. The energy expenditure of consumers is recorded, analyzed and adapted with appropriate measures, by way of example to the process speed frequency optimization, start-up behavior or use of wasted heat through heat recovery. Our other aims are to comply with motors efficiency ratings (IE 3 / IE 4) and to improve them.

Fields of development currently focus on remote diagnosis and process-oriented video recording.