MasTec has been distributing Belotti for many years. BELOTTI has been active in the power industry for over 100 years, starting with with electro-mechanical products in 1904. Please do look at the web site for a large range of excellent technical information and a description of their product range. AVR Power Stabilisers ( Automatic Voltage Regulation) Usages - Buildings, Industry, Commerce, Marine, IT and Telecoms Belotti use two methods for AVR = Automatic Voltage Regulation Variacs with Servo Control Patent Pending IGBT Electronic AVRs 1 to 200KVA  The new Patent Pending Electronic system is unique and advanced Belotti Variatori introduce the latest IGBT solid state power electronics technology (patent pending) in the voltage stabilisation field. Variable transformer, driving engine and specific voltage control circuit of electromechanical stabilizer are eliminated by the use of solid state IGBT switch. No moving parts (brushless) and perfect magnetic/electronic integration allows high stabilization precision (± 1%) and speed 30ms, complete range linearity (no holes in the regulation range) and more efficient voltage resolution than any other electromechanical stabilizers. This means no maintenance need, higher performance and lighter and more compact machines. Other electronic stabilisers use triac components in order to adjust voltage output: this cause the system to work as a step regulator (no linearity), leading to a limited resolution and waveform distortion. IGBT State of the art semiconductor power technology manages only the power part which needs to be regulated, allowing for high reliability, efficiency and no waveform distortion. Single phase and three phase system available with voltage regulation capacity in a broad range and standard power ranging from 2 to 40 kVA (lower or higher power system available on demand). Open frame and enclosed system available to cover different customer applications.We have client who use these products in Super Yachts for managing the AC power for the complete marine system, to clients who use these in simple hand controlled Variac systems.  Variacs Belotti is one of the world leading manufacturer in voltage regulation apparatus using Hand Controlled and Servo Controlled Variac Transformers, both three and single phase.  Standard, Custom Dry Transformers: 1KVA to 2000KVA Standard transformers with copper windings Standard three phase transformers with aluminium windings Covered transformers with control and protection system  Rheostats: Rheostat is an adjustable resistance connected into an electrical circuit to provide a means of control while the circuit is "live". Our Rheostats have been accurately studied and in order to obtain the best performance, only first quality raw materials are used in the construction: for the tubes, special porcelain of high thermal and electrical resistance is used; for the winding only oxidised and annealed constantan of high quality , unalterable , even when strongly heated and with negligible coefficient of temperature , is used in all types.  Rotary Frequency Converters The asynchronous three-phase frequency converter is made up by an asynchronous three-phase motor with cage rotor, coaxial with an induction machine with wound rotor, operating as a generator. The active parts of the motor unit and generator are contained in an enclosed and externally ventilated frame, with protection IP 54. Rotary frequency converters carry out the transformation of the electric energy at mains frequency in energy with higher frequencies and are used to feed high-frequency motors able to operate with high rotation speeds.

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