1948 – 1949
Design of Bar-type Current Transformers and Wound -type Current Transformers.
Design of keyhole bushing (patent granted)
Design of Tube-type Transformers (patent granted)
1950 – 1959
Expansion of the range of housing sizes for a wide variety of applications
Introduction of Auxiliary Current Transformers
Introduction of Summation Current Transformers
Development of High Current Transformers
Development of Split-core Current Transformers
Development of Voltage Transformers for voltages from 100 up to 3600 V
Receipt of certificates of the “Physikalisch Technischen Bundesanstalt” in Braunschweig
1960 – 1969
Development of 3-phase Current Transformers for measuring purposes.
Development of 3-phase Current Transformers for bill/tariff metering
Development of D.C. Current Transformers with accessory device.
1970 – 1979
Current Transformers with secondary plug-in connections.
Clamp-type Current Transformers for supplementary mounting around bars or cables
Development of a damping inductance device against ferroresonance
1980 – 1989
Error Current Summation Transformer
Small Current Transformer for bill/tariff metering
Standard series for Current Transformers
Voltage circuit taps on Current Transformer Bars.
Transformer – protection device EMKR
1990 – 1999
Development of customized transformers for Siemens-plants
The “Blue Series”