Electric gate transformers

Our electric gate transformers

Most motors for gates, sliding gates and garage doors run at extra-low voltage: an electric gate transformer steps the 230 V mains down to 24 V or 12 V AC to supply them. Here are our models, with a price shown for every power rating:

• 230 V / 24 V transformer, from 63 VA to 20 kVA, open frame (IP00), with a cover (IP23) or sealed (IP54): the model for gate motors running on 24 V AC.
• 230 V / 24 V toroidal transformer, from 50 to 2,000 VA: more compact, for a motor control box with little room to spare.
• 230 V / 12 V transformer, 230 V / 12 V toroidal transformer and 2 × 12 V toroidal transformer: automation and lighting at 12 V.
• 220 V / 110 V transformer and 230 / 400 V to 2 × 115 V transformer: equipment running on 110 to 115 V.

12 V or 24 V: which voltage for a gate motor?

The voltage is written on the label of the original transformer, on the control board or in the gate opener's instructions. “24 V AC”, “24 VAC” or “24 V ~” calls for a 24 V AC gate transformer; “12 V AC” calls for a 12 V transformer. If the motor runs on direct current (“24 V DC”, “24 VDC”), it needs a 230 V / 24 V DC power supply, not a transformer.

24 V AC is also used by electric door strikes, intercoms, irrigation solenoid valves and roller shutter motors: the same transformer often supplies several of these devices.

Sizing a gate motor transformer

Add up the power of the motor and of the accessories it supplies (flashing light, lighting, electric strike), multiply by 1.25 and choose the next rating up. A 200 W gate motor needs 250 VA. When fitting a replacement transformer for a gate motor, keep the same voltage and choose a power rating at least equal to the one shown on the old transformer's label.

Installation: enclosure, cable and protection

• Where to install it: open frame (IP00) inside the motor's control box or another closed enclosure; with a ventilated cover (IP23) in a dry room; in a moulded housing or a sealed enclosure (IP54) for sheltered outdoor use.
• The cable: at 24 V, the current is almost ten times higher than at 230 V. Over 25 m, 10 A already needs 10 mm² cable to keep the voltage drop below 5 %: work out the cable size before you run the cable.
• Protection: on the 230 V side, an aM fuse or a type D circuit breaker for a conventional transformer, and a time-lag fuse (T) or a type D circuit breaker for a toroidal transformer; on the secondary side, protection rated for the output current.
• Connection: with the power off, by a qualified person.

Conventional or toroidal gate transformer?

The conventional transformer ranges from 63 VA to 20 kVA and comes open frame, with a cover or sealed. The toroidal transformer ranges from 50 VA to 2 kVA: more compact, lighter and quieter, it is fixed with a single centre bolt. Both are wound and tested in our workshop in Gailhan (Gard, southern France) and carry a 2-year warranty. For larger control circuits, see also our control transformers and our safety transformers.

Ordering, delivery and custom-built models

Standard models are dispatched from France within 24 to 48 hours, and each product page shows the price of every rating and every version. Installers and automation specialists: a trade account shows prices excluding VAT, with an immediate 5 % discount. For another voltage, the custom single-phase transformer is configured online; for a part number you cannot find, request a quote and we will reply within 48 hours.