Distribution transformer ECF series

immersedfor electrical networkshigh-voltage

Voltage transformers type ECF are used in high voltage networks within the 72-550 kV range. They transform high voltage into standardised values for meters, measuring and protection devices. The capacitive voltage transformer consists of one condenser unit and one electromagnetic measuring unit (EMU). The condenser unit is located in the insulator and consists of one capacitive mixed dielectric which is impregnated with insulation liquid. This active part is hermetically sealed to the outside. For volume compensation of the oil there is a stainless steel expansion bellows in the head section. The operating pressure can be visualized via a monitoring unit. Depending on customer specification, creepage distance or voltage level, the condenser unit consists of up to 3 parts. In order to avoid field distortions, a shielding electrode is used from a voltage level of 420 kv. A high-grade composite or porcelain insulator can be used as insulator. According to the contamination classes of common standards, different creepage distances can be selected. The EMu is an inductive intermediate voltage transformer which is housed in the foot case of the transformer. It allows the safe transmission of measurement signals. A damping unit ensures increased safety against relaxation oscillation. By using proven materials the voltage transformer is temperature- and accuracy stable over the entire service life. On request, the voltage transformer can be designed in such a way that it can be used as a coupling capacitor for carrier transmission in high-voltage lines.