Tank Type Test Transformer Systems
Tank Type Test Transformer Systems
Application
Tank type test transformer systems are used as high voltage source for dielectric testing of medium and high voltage components as
- Distribution and Instrument Transformers
- Cables, Terminations and Joints
- HVDC Components
- Motors and Generators
- Insulators, Capacitors and Bushings as well as for wet and pollution tests or long duration
Applications.
On-Site Testing
The dead tank transformers can be fixed mounted in a container or on a trailer. No handling on site is required and either bushings or cable sockets with connecting cables can be installed to contact the test object.
Laboratory Use
A special surface treatment and the hermetical sealing make the transformers insensitive against water, dirt and dust during wet and pollution tests or outdoor applications. The high ONAN cooling performance, allows testing over a longer time without forced cooling systems.
Partial Discharge Measurements
Different kinds of partial discharge measurements like conventional method, non-conventional methods or UHF can be applied. With a suitable mains and high voltage filtering, pd- levels of less than 2pC can be achieved.
Breakdown, Wet and Pollution Tests
A suitable selection of the short circuit impedance limits the failure current and external damping elements protect the transformer against transient overvoltages. Special designed transformers for the requirements of wet and pollution tests can be delivered on demand.
Tailor-made Solutions
agea-kull designs and builds transformers and if requested tank type cascades tailor made to your requirements. The following list represents therefore only an excerpt of our manufacturing range.
Design of Components
High Voltage Transformers agea-kull developed different types of tank type transformers. Depending of application, power and voltage, single coil transformers or units with two windings in parallel can be delivered. They are mounted in steel tanks and at voltages over 50kV they are hermitically closed to prevent contamination of the oil. The low voltage end of the high voltage winding isisolated lead out to enable C-tanσ measurements ongrounded test objects and the capacitive measuring tapof the high voltage bushing can be used to measure thehigh voltage.
Advantages:
- Shock-proof and short circuit resistant
- High ONAN cooling performance because of corrugated steel tank
- Automatic grounding of the output (optional)
- Suitable for outdoor operation (optional)
- DC circuit on top of the transformer for performing
DC testes (optional)
Compensation Reactors
Primary compensation reactors reduce the required input current. High voltage reactors can be used to extend the load range or to adapt it to the actual test object.
Regulating Transformers
An oil or air insulated column type regulating transformer of the agea-kull ST70-series with special collector design is used to adjust the test voltage.
Control Units
Either robust relay based control units or modern computer controls can be delivered.
The latter provide the possibility of
- Automatic sequence testing
- Data storage and test protocol generation
- Setting of high voltage trips
- Adjustable flash detection