9 Measuring, detection, monitoring and control devices and apparatus, namely diagnostic apparatus for testing, diagnosing and locating faults in cables and electrical equipment; guidance, tracking, and targeting devices for audio frequency location, sound field location, coincidence measurement, fault location, and route location; centrally controlled integrated measuring systems and integrated, fully automated measuring systems comprised for checking, diagnosing and locating faults in cables and electrical equipment; apparatus and instruments for converting electrical energy, namely, voltage converters, frequency converters, surge voltage generators and high voltage multipliers and combinations thereof; the aforesaid devices and apparatus being stand-alone measuring systems and also for installation in vehicles and equipment for cable test vans, vehicle trailers, containers, workshop vehicles; downloadble and recorded computer software, data processing programs, system and system support software and firmware for operating the aforesaid apparatus, devices, instruments and measuring systems; downloadable and recorded computer software, data processing programs, system and system support software for testing and measuring techniques on cables and electrical equipment; downloadable and recorded application software for cloud computing services for using data from the aforesaid measuring systems; high-voltage multipliers; high-voltage reactors; high-voltage capacitors