What is a control transformer, and which ranges does LEIPOLE supply?
A control transformer steps the supply voltage down to the voltage of the contactor coils, relays and signal lamps in a panel and isolates that control circuit from the mains. LEIPOLE supplies single-phase JBK transformers from 40 VA to 60 kVA (JBK3 for machine tools, JBK6 with short-circuit and heat protection, JBK7 low loss) and three-phase dry-type transformers: SG from 2 to 100 kVA, SGB from 0.5 to 50 kVA and JSG servo transformers from 0.16 to 10 kVA.
See single-phase transformers →
Do I need a transformer or a 24 V DC power supply?
A control transformer gives an isolated AC voltage. PLCs, sensors, DC fans and other electronics need direct current, which comes from a DC power supply. LEIPOLE DZD-2A, DZD-5A, DZD-10A and JSZ-20A DC transformers convert an AC supply to a stable 24 V DC at 2, 5, 10 and 20 A; the JSZ-20 takes a three-phase input.
See 24 V DC power supplies →
How do I size and order a control transformer in Singapore?
Add up the power of every coil, lamp and device the transformer feeds and allow margin for contactor coils that pull in at the same time, then choose the next VA or kVA rating up. Send the LEIPOLE Singapore team the primary and secondary voltages, phase, rating and quantity for a quotation.
Request a quotation →
