MVA specializes in tests and services for high voltage transformers and systems: troubleshooting, advanced oil analysis, electrical tests, maintenance and repairs of high voltage and ultra-high voltage transformers.
On-Site transformers and HV system tests:
Sweep frequency response analysis test –The most advanced test to detect internal mechanical faults and a wide range of electrical faults
Insulation Resistance Test: Tan-delta, capacitance and insulation tests.
On-Line-Tap-Changer tests for MR, HM tap changers.
Themographic imaging for detection of hot-spots and overheating faults.
Advanced oil analysis lab, the only lab in Israel that performs dissolved gas analysis, enabling rapid turn-around and results in a short time. Advanced oil analysis are a key tool to troubleshoot internal problems in the transformer and even an indication to the remaining life of the transformer.
We provide the entire routine and type test suits including insulation tests, ratio, impedance, impuse, partial discharge, noise level, short-circuit over-voltage.
Oil leak repair using novel method without need for oil draining/dismantling insulators.
Transformer oil drying and filtration up to 6000L/h using one of the largest mobile vacuum drying machines. We are the only company able to perform drying while the transformer is energized (for critical transformers)
Scheduled maintenance, tests and services for online tap-changers
- Coil rewinding and replacement
- Vacuum oven drying
- Oil treatment/replacement
- Auxiliary system replacement: tap-changers/protection relays/valves.
Extended warranty for new Ardan transformers
Seminars and consulting: we give seminars at professional conferences, Technion and engineering schools.