Knowledge base
Fundamentals, selection guides and calculators for current measurement
12 articles
VA power calculator
Determines the required VA rating from cable length, cross-section and the burden of the connected instruments.
Current transformers – types, selection, standards
The overview: how a current transformer works, which types exist, how to select one and which standards apply.
Transformer finder
Step by step to the right current transformer: what for, how mounted, which current – you end up with real article numbers from our range.
Cable cross-section for the burden
Which cross-section does the measuring cable need so that the rated burden is sufficient? The counterpart to the VA calculator.
Which accuracy class do I need?
Permissible current error and phase displacement of the classes to IEC 61869-2 – including partial load, where the differences are largest.
Check short-circuit withstand
Will the transformer withstand the fault current of your installation? Converts the rated short-time current to your clearing time.
Plug-on current transformers for precise measurement
Plug-on current transformers are ideal for safely transforming primary currents into measurable secondary values.
Wound current transformers for flexible primary currents
Wound current transformers are ideal when flexible primary design and custom ratios are required.
MID energy meters for transparent energy monitoring
MID-compliant energy meters are ideal for transparent billing and professional energy monitoring.
Grid protection relays for secure grid integration
Grid protection relays monitor electrical parameters and trigger safe disconnection in fault conditions.
Protective current transformers for system protection
Whereas measuring transformers should saturate quickly above their operating current range, protective current transformers require saturation as far outside this range as possible. This ensures correct signal transmission even at high fault currents.
Cable conversion current transformers for retrofit installation
Cable conversion current transformers are the ideal solution when CTs need to be installed retrospectively without interrupting the primary circuit. The compact design and easy mounting with UV-resistant cable ties make them highly practical.