Dry-type control transformer to supply control circuits (440/220 to 110 V and combinations). Quoted by VA rating and voltages.
Tell us the reference or key specification (current, power, gauge, size), quantity and city — a technical advisor sends your quote the same business day.
The control transformer is a single-phase dry-type transformer per IEC 61558-2-2 that steps power voltage (440 or 220 V) down to the panel control voltage (110 or 220 V). It is sized in VA by adding coil, pilot light and solenoid loads, with margin for contactor inrush current.
The control transformer is a dry-type transformer used to supply control circuits, coils, pilot lights, relays and control elements inside electrical panels. At TECTUL it is quoted by VA rating, primary voltage, secondary voltage, mounting type and application. The actual lot data includes combinations such as 440/220 to 110 V and other configurations as required. It differs from a control relay and from a timer because it does not execute logic or timing: its function is to adapt and isolate voltage levels for the control circuit. In technical selection, IEC 61558 is a reference for safety of transformers, power supplies and similar equipment; in machinery, IEC 60204-1 guides power supply and protection of control circuits. Selection must consider total load, future growth and suitable protection.
We dispatch control transformers to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp with voltages and VA rating.
| Parameter | Values |
|---|---|
| Standard catalog ratings | 50 · 75 · 100 · 150 · 250 · 500 · 750 · 1000 VA |
| Usual primaries | 440 V, 220 V (with combined taps) |
| Usual secondaries | 110 V, 220 V |
| Insulation thermal class (IEC 60085) | B = 130 °C · F = 155 °C · H = 180 °C |
Control transformers are specified under IEC 61558-2-2 (control and safety transformers). The thermal class per IEC 60085 states the maximum admissible temperature of the insulation system.
It depends on VA rating, primary and secondary voltages, mounting and availability. TECTUL quotes via WhatsApp with the drawing or required data.
The transformer adapts voltage to supply the control circuit. The encapsulated relay switches signals through contacts.
It is fixed inside the panel, the primary is connected to the available voltage, the secondary to the control circuit, and both sides are protected according to design.
Primary voltage, secondary voltage, VA rating, mounting type and number of loads it will supply.
Yes. The actual lot data includes dry-type control transformers for combinations such as 440/220 to 110 V and others according to requirement.
Yes, as long as the secondary voltage and VA rating are sufficient for the coils and other loads in the control circuit.
By adding the sealed (holding) power of all coils, pilot lights and control loads that operate simultaneously, then checking the transformer also rides the inrush of the contactors that close at the same time.
Because a reduced control voltage (110 V) lowers the risk to operators at pushbuttons and doors, uses standard coils and pilots, and limits damage on a ground fault in the control circuit.
Updated: July 22, 2026
