High-precision tan delta / power factor measuring equipment are used for measuring very low dielectric losses in high voltage apparatus. Tan Delta / Power Factor is a precise and non-destructive method to provide important information on the extent of aging in insulation systems. Tests are conducted during periodic maintenance and inspection of high voltage equipment such as power transformers, instrument transformers, bushings, capacitors, motors, generators, power cables, etc.
Nominal capacitors can be used as a capacitance standard together with the MIDAS 2881 or MIDAS micro 2883 to measure the dielectric dissipation factor (tan delta), as a reference capacitor for voltage measurements, or to measure the dielectric constant or capacitance of cables, insulators, transformer windings, etc.
The MIDAS 2881 is a portable power factor tester for periodic maintenance and inspection of high voltage insulation losses of electrical apparatus, especially in the harsh electrical environments experienced in substations and other field locations. Designed for testing at local powerline frequency, the MIDAS automatically measures and records dissipation factor (tan delta), power factor and all other relevant values of impedances. Damage or changes in the insulation material are detected rapidly and reliably.
The MIDAS micro 2883 is a revolutionary Power Factor / Dissipation Factor and Capacitance tester used to test the insulation of high voltage components (i.e. transformers, bushings, capacitors, circuit breakers, surge arrestors, etc). Designed and tested for all types of conditions, the complete instrument is built in one rugged case with casters. With its single-box design, weighing only 25 kg / 55 lbs, this tool can be easily transported to any testing location – in the field or in the factory. All accessories are stored in a robust duffel bag that can be affixed to the case itself. Cable drums make set-up and storage quick and convenient.
Compact and economic device for the capacitance and monitoring of solid insulation materials under temperature and pressure. This device is specially developed for tests according to ASTM D150, IEEE 286, IEC 60093, and IEC 60894.
Frequently Asked Questions
What is Tan Delta / Power Factor testing, and why is it critical for high voltage assets?
What types of high voltage apparatus benefit most from Tan Delta and Power Factor diagnostics?
This diagnostic method is a foundational standard for comprehensive predictive maintenance across a wide array of electrical infrastructure, including:
- Power and Instrument Transformers: Evaluating winding insulation and core integrity.
- Bushings: Identifying localized dielectric degradation and moisture trapping.
- High Voltage Cables: Monitoring long-term aging and water-treeing in solid insulation.
- Generators and Rotating Machines: Assessing stator insulation systems.
- Capacitors, Motors, and Circuit Breakers: Ensuring overall operational reliability and sub-component insulation health.
What are the operational advantages of the single-box design featured in the MIDAS micro 2883?
Traditionally, high-voltage Power Factor testing required heavy, multi-component equipment setups that complicated logistics in the field. The MIDAS micro 2883 redefines field ergonomics with a revolutionary single-box configuration weighing only 25 kg (55 lbs). Enclosed in a ruggedized case featuring integrated casters and accompanied by a dedicated duffel bag for cable drums and accessories, it provides unprecedented mobility. This enables testing technicians to seamlessly transition from lab environments to remote field substations without sacrificing the analytical accuracy expected of benchtop standards.
How can I consult with HV Technologies for Tan Delta / Power Factor testing solutions or technical support?
HV TECHNOLOGIES, Inc. (HVT) is the premier partner and US supplier for advanced high-voltage testing and diagnostics systems from HAEFELY.
To discuss your testing requirements, you can reach the High Voltage Division directly through the following channels:
- By Email: Send your application specifications and equipment requirements directly to the sales engineering team at hvsales@hvtechnologies.com.
- By Phone: Call +1 (703) 365-2330 to speak with an applications specialist.
- Online Quote Requests: Navigate to the Request a Quote to submit project-specific requirements directly to the engineering team.