terminal blocks used for current transformers

The combination of disconnecting lever, short-circuit bridge and lever connection in a single system, i.e. After short-circuiting the CT side and simultaneously disconnecting the primary side, the meter can be easily and safely replaced or a protective relay test can be performed. This prevents the voltage at the current transformer from running up and protects it from damage or even destruction.

It ensures that the current transformer within the terminal is short-circuited before it is disconnected from the rest of the transformer circuit. One of the most important advantages of the new transformer terminal is the 'close-before-open' contact for up to four connections. For safe application when disconnecting or isolating protection and measuring devices, the terminal short-circuits the current transformer and thus prevents high voltages from occurring in the secondary winding. The measuring transformer terminals of the TTB series have been specially developed for use in secondary circuits of measuring transformers. An IEC 6 Annex D approval underlines the quality claim. It increases system availability and extends the life cycle of the entire switchgear. For this purpose, the Klippon® Connect measuring transformer terminals of the TTB series feature a unique disconnect lever mechanism, the 'close-before-open' contact. Weidmüller has developed the new Klippon® Connect measuring transformer terminals of the TTB series for this application, for particularly simple and safe wiring – even within complex circuits.Īvoiding operating errors during operation is a top priority here, as they can have serious consequences for personnel and equipment. In power transmission and distribution, current and voltage transformers are used primarily for protection and measurement functions.

Terminal blocks used for current transformers