Botter Elettrotecnica transformers, autotransformers and reactors

Technical selection of Botter Elettrotecnica industrial components: dry-type single-phase and three-phase transformers First and BTTT, starting reactors BTRT and line chokes BTIT.

Botter First and BTTMS single-phase safety and isolating transformers

Dry-type single-phase transformers designed for industrial control circuits, automation panels and auxiliary power. First series (FBTTMS, FBTTMI) and BTTMS provide galvanic isolation and stepped conversion from 230/400 V down to 12, 24, 48 or 115 V under EN 61558-2-4 standards.

Power capacity ratings ranging from 30 VA up to 5000 VA with low no-load thermal losses
Primary dual winding voltage taps for 230/400 V matching various industrial grid levels
Touch-proof screw terminal blocks rated IP20 with vacuum varnish impregnation class F
Specialized mounting configurations including DIN rail models BTTMDIN and PCB type BTTMA

Three-phase dry-type power transformers BTTT, BTTTS and BTTTFV

Industrial three-phase dry-type transformers rated up to hundreds of kVA for distribution boards, machinery and power inverters. Families BTTT, BTTTS and BTTTFV are manufactured under EN 61558 and UL 5085 standards, supplying power to processing lines and solar installations.

Nominal capacity range from 500 VA to hundreds of kVA utilizing natural convection cooling
Winding connection topologies star, delta and zigzag to balance loads and cancel harmonics
Protective steel enclosures available with IP23 and heavy-duty IP54 environmental ratings
Reinforced dielectric insulation design BTTTFV for solar inverter and converter coupling

Single-phase and three-phase industrial autotransformers BTAM and BTAT

High-efficiency autotransformers for stepped voltage transformation without galvanic separation. Series BTAM (single-phase) and BTAT (three-phase) feature compact exterior dimensions and reduced weight compared to standard double-wound units, optimizing cabinet footprint.

Flexible voltage configurations for matching imported machinery to 200, 220, 380 and 440 V
Compact mechanical assembly with shared magnetic core ensuring reduced operating losses
Easy panel installation into automation enclosures via slotted universal steel brackets
Options with integrated terminal blocks, modular circuit fuses and thermal overload probes

Three-phase motor starting reactors and inductors series BTRT

Three-phase starting reactors engineered to limit inrush currents and mechanical torque shocks during the start of squirrel-cage asynchronous motors. Series BTRT is manufactured in full compliance with EN 61558-2-20 and EN 60076-6 for no-load or heavy-load duty cycles.

Effective reduction of line starting current surges safeguarding plant supply networks
Configurations for single-step light starts as well as heavy-duty two or three-step cycles
Class F thermal insulation rating with deep vacuum impregnation using polyester compounds
Rugged coil clamping construction resisting intense electrodynamic electromagnetic forces

Three-phase input and output inverter line filter reactors BTIT

Inductive chokes developed for variable frequency drives, regenerative inverters and thyristor systems. Input line reactors BTIT mitigate harmonic distortion on the mains, while output motor reactors suppress voltage wave steepness dV/dt to safeguard motor winding insulation.

Suppression of high-order electrical harmonics and line voltage spikes across the plant
Reduction of steep dV/dt transient overvoltages and capacitive losses along long cables
Linear magnetic permeability characteristics under high peak loads and PWM switching
Standard design ratings with 2% and 4% impedance drop Uk for optimal harmonic filtering

Industrial AC/DC linear and regulated power supply units series BTAL

Linear and filtered direct-current power supplies engineered for industrial automation relays, sensors, controllers and solenoid valves. Families BTALEC (single-phase filtered), BTALST (regulated) and BTALTF (three-phase) deliver stable 24 V DC power in demanding plant environments.

Stabilized and filtered direct current output ratings at 12 V, 24 V and 48 V DC levels
High overload withstand capability with built-in protection against short circuits
Heavy-duty filter electrolytic capacitors paired with front LED operational indicators
Rugged metal chassis designed for panel mounting or DIN rail integration in enclosures

Design and insulating structure of First and BTTMS single-phase transformers

Botter Elettrotecnica single-phase dry-type transformers in the First (FBTTMS, FBTTMI) and BTTMS families are engineered for dependable power supply across automation cabinets, control panels and signaling circuits.

Cores are constructed from low-loss electrical silicon steel laminations, ensuring high electrical efficiency and thermal stability during continuous industrial duty.

Windings utilize copper wire with double insulation, vacuum-impregnated with class F insulating resin to safeguard against moisture and industrial dust.

Touch-proof IP20 screw terminals prevent contact with live conductors, while separate winding chambers provide strong dielectric isolation complying with EN 61558-2-4 and EN 61558-2-6.

Three-phase dry-type power transformers BTTT for distribution and inverters

Three-phase dry-type transformers across BTTT, BTTTS and BTTTFV series deliver power capacity up to hundreds of kVA for industrial machinery, production lines and inverter installations.

Interleaved core joint engineering minimizes audible acoustic hum and mechanical vibration throughout plant operating floors.

Specialized BTTTFV models are designed for solar photovoltaic inverters and variable frequency drives, withstanding non-sinusoidal currents and voltage spikes.

For challenging factory environments with particulate dust or humidity, units are housed in ventilated protective steel enclosures rated IP23 or IP54 finished with durable powder coating.

Engineering applications of BTAM and BTAT industrial autotransformers

Botter Elettrotecnica autotransformers across BTAM (single-phase) and BTAT (three-phase) series provide a compact, cost-effective solution for voltage transformation where galvanic isolation is not mandated.

By utilizing a shared winding section for primary and secondary circuits, copper and core steel volume are substantially minimized.

This shared-winding topology results in lighter weight and smaller physical footprints than conventional double-wound transformers.

These units are widely utilized for adapting imported CNC machine tools and automation robotics to 380/400 V power networks requiring 200 V, 220 V or 440 V inputs, offering minimal internal losses and high overload stamina.

BTRT three-phase current-limiting motor starting reactors

Series BTRT three-phase starting reactors are engineered to soften inrush currents when starting heavy squirrel-cage asynchronous electric motors.

Inserting inductive impedance into the stator circuit during startup curtails line current spikes, stabilizing factory voltage levels and preventing nuisance trips of upstream breakers and switchgear.

Damping startup torque additionally prevents hydraulic water hammer in pump stations and eliminates mechanical gear shocks across heavy conveyors and industrial blowers.

Built in accordance with EN 61558-2-20 and EN 60076-6, BTRT reactors are available for normal starts or heavy multi-step starting cycles with extended thermal duty.

Selecting BTIT line and motor filter chokes for variable frequency drives

Three-phase inductive filters and chokes in the BTIT family enhance electromagnetic compatibility across variable frequency motor drive systems.

Input line reactors with 2% or 4% impedance drop attenuate electrical line harmonics, smooth grid voltage waveforms and shield rectifier bridges from transient spikes caused by utility switching.

Output motor chokes installed between the drive inverter and electric motor damp steep dV/dt pulse fronts generated by PWM modulation.

This lowers peak dielectric stress on motor winding insulation and curtails high-frequency capacitive leakage currents along long shielded cable runs within industrial facilities.

Engineering specifications and technical submission procedures

To ensure accurate cross-referencing and selection of Botter Elettrotecnica transformers, autotransformers or reactors, provide the alphanumeric code from the equipment rating plate (such as FBTTMS003048, BTTMS0500, BTTT-25, BTAM-10, BTRT-55 or BTIT-030) or a clear photograph of the nameplate detailing electrical specifications.

If the nameplate is missing, specify product category, phase count, rated VA/kVA capacity, primary and secondary voltages, winding connection topology and cooling requirements.

For motor starting reactors, indicate motor power in kW, full-load current, hourly starting frequency and acceleration time to receive quotation details.

Botter Elettrotecnica and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Botter Elettrotecnica and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.