In addition to low-voltage current transformers, GMW is also a supplier of medium-voltage supporter current transformers of the series 10N and 20N in the narrow design according to DIN 42600, Part 8.
We can also offer single-pole and two-pole isolated voltage transformers in the 10N and 20N series, in the standard DIN 42600 described designs.
Our medium-voltage current transformers are SF6-gas free and therefore more environmentally
friendly, more durable and emit less heat than conventional MV-transformers!
We deliver single-pole, two-pole and frequency-optimized medium voltage current transformers up to 36 kV
within 4 - 6 weeks.
Medium-voltage current transformers for indoor applications that transmit one or more primary side currents proportionally and in phase to standardized secondary currents. These are cast resin insulated and serve in addition to their primary function as a current transformer as a busbar holder.
These current transformers can be used for both measuring and protection purposes, optionally approved for offsetting according to the conformity assessment procedure.
The medium-voltage current transformers are also available as multi-core converters. The maximum possible number of cores depends on the selected power and the accuracy class that results in the core volume. Optionally, the current transformers are available as primary or secondary switchable.
For the primary switchable current transformers, it is possible to choose between two primary rated currents, depending on the connection of the primary connections by parallel or series connection. The primary-side rated currents can only be realized in the ratio 1: 2.
In the case of the secondary switchable current transformers, switching is made possible by one or more taps. The primary-side nominal currents can thus be realized in different ratios.
In addition to our medium-voltage current transformers, we can also provide you with the corresponding voltage transformers for voltage levels of Deliver 7.2 kV
up to and including 24 kV. These are available in single-pole or double-pole insulated versions and can be used for measurement or protection purposes.
In the case of single-pole isolated voltage transformers, it is also possible to carry them out with an additional winding for earth fault detection.
This covers the entire demand range of typical medium-voltage switchgear.
In addition to the suppressor current transformers, we also supply cable conversion current transformers in full encapsulation with a maximum operating voltage
of 0.72 kV for retrofitting in the isolated area of medium-voltage switchgear.