AC test systems with transformer design, type WP, are used to test high voltage products (for example, high voltage cables, power transformers, gas-insulated switchgears), components (bushings, arresters), and insulating materials.
They can be used in a variety of applications, such as
- Routine testing, type testing, and in particular, wet testing
- Indoor and outdoor testing
- On-site testing
HIGHVOLT offers three different types of AC test systems with a transformer design depending on the specific application:
AC test system with insulating sheath transformers
The transformer is installed in an insulating sheath and is oil-cooled. Individual transformers can be connected in parallel or series to increase the current or the voltage.
Application
- Routine testing, type testing
- Indoor and temporary outdoor testing
- On-site testing
Benefits
- Space-saving design in a vertical
cascade arrangement thanks to modular design
- Suitable for PD measurements due to very low
internal PD level
- Suitable for short-lasting loads due to the test system’s short-term overload capacity
AC test system with metal tank transformers
The transformer is situated in an enclosed and earthed metal tank. This transformer is oil-cooled and can be optionally equipped with a suitable bushing (oil-to-air or oil-to-SF6).
Application
- Routine testing, type testing, and particularly suitable for continuous operation (for example, prequalification tests)
- Indoor and outdoor testing (also for extreme climate conditions)
- Wet, humidity, and pollution testing
Benefits
- Saves space in the test bay thanks to earthed metal tank enclosure
- Very well suited for short-lasting higher loads thanks to the system design allowing continuous operation and high currents (high power)
- Suitable for PD measurements due to low PD level
- Extremely high test voltage reachable due to cascade design
- Possible to test GIS components, because the metal tank transformer is often equipped with an oil-to-SF6 bushing
AC test system with GIS transformers
The transformer is designed as a GIS model and is therefore ideal for testing GIS/GIL components and switchgears.
Application
- Indoor testing
- On-site testing
Benefits
- Suitable for short-lasting loads thanks to the
test system’s short-term overload capacity
- Ideal for PD measurements because the system is
built entirely in GIS design
- Compact size/minimal weight
- Low connected load