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how to wire a low voltage transformer | ehow

by:KEBO      2019-12-03
The low voltage transformer can be used for control circuits from ringing the front door doorbell to complex motor automation.The low voltage transformer is largely a single-phase unit with a high-end voltage range of 120 to 480 v ac (VAC ).The low-The terminal voltage is generally 12 to 24 VAC.By following a basic process, you can wire the low voltage transformer in a few minutes.
Observe the nameplate label on the low voltage transformer and the corresponding \"high\" side or primary connection.Typically.For 240 and 480 VAC inputs, the high-end terminals of the transformer are identified as H1, H2, H3, and H4.The 120VAC input can be simply two-Screw connection for most low voltage transformers.Before any terminal of the transformer, please follow the nameplate diagram of all terminals.
A transformer connecting the primary input of 230 or 480VAC.Connect terminals H2 and H3 with the metal jumpers provided by the supplier, or make a small jumper by stripping a short wire with a wire stripping clamp.Connect the jumper with a screwdriver and tighten the screw terminal to secure the wire jumper in place.
Connect the input or high voltage line to H1 and h2.Low voltage terminals will be recognized by X1, X2, X3 and x4.The interconnect of the low voltage side or secondary terminals depends on the high voltage side or the primary voltage.
End the low end of the transformer for the 480VAC primary input.As shown in step 2, interconnect terminals X4 and X2 and one of the low-voltage output wires can be connected to one of the terminals.You must also interconnect X3 and X1 in the same way.Another low voltage wire will also be connected to this combined terminal.
Wiring the low voltage transformer for 30vac input on the primary power supply.The secondary interconnect will use X2 and X3;Tie the two terminals together with a jumper and tighten them with a screwdriver.1 output line is connected to X1 and the other 1 output line is connected to x4.
Connect the ground wire from the low side terminal X4 to the metal frame of the housing ground or transformer.This will ensure the correct grounding of the low voltage side of the transformer.
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