CONVENTIONAL FLUID CURRENT TRANSFORMER
Resilience and reliability, even in extreme operating conditions
Resilience and reliability,
even in extreme operating conditions
CONVENTIONAL FLUID CURRENT TRANSFORMER
550 kV / 5000 A
Current Transformers utilizing conventional fluid insulation provide accurate and reliable current transformation, measurement, with the proven Trench design and highest reliability.
CHARACTERISTICS
- For Voltage levels up to 550 kV
- Rated primary current up to 5000 A
- Fully type-tested by international standards
GENERAL
- Conventional fluid-impregnated paper insulation has been improved based on many years of experience with the prestigious Haefely-Trench original design.
- The modular design allows the use of a reduced number of components.
- An optimized drying and oil-soaking process easily allows adaptation to specific Customer‘s needs.
Cores/windings are located at the top of the current transformer [head type]
The outer part is made of aluminum or another corrosion-resistant material, e.g., stainless steel
External insulation made of porcelain or composite insulator
The outer part is made of aluminum or another corrosion-resistant material, e.g., stainless steel
Bar-type primary conductor allows higher short-circuit currents and prevents a large voltage drop across the primary winding
MAIN FEATURES
Conventional fluid Current Transformers
ensure accurate and reliable current transformation
Design
Trench's conventional fluid CTs are based on a globally established insulating medium technology. The head design of the current transformers is characterized by low weight and minimal fluid volume.
Seismic
Excellent seismic performance as a consequence of the optimized design of flanges, insulator and, their interconnection.
High current
The bar-type primary conductor is designed for high service short-circuit current and prevents high voltage drops in the primary winding.
High Voltage insulation
Superior control of internal and external insulation stress, due to the use of a proprietary system of finely graded bushings.
Hermetically sealed
In all operating conditions, a stainless steel bellow allows the liquid volume to change and the internal pressure to remain the same as the ambient pressure.