The Low Voltage Transformer is mainly used to turn Medium Voltage (MV) EU current into Low Voltage (LV) and back. This is useful for powering basic machines.
Unlike Real Life™, there is no actual "voltage" in IC². EU travels in "packets" through wires with near-infinite speed and has smart pathfinding (somewhat like RP2 pneumatic tubes). Packets are measured in size (in EU/p) and volume (EU). (Size being the amount of energy it contains as it leaves a storage unit, volume being how much energy is left in each packet after inefficient cable usage).
- If redstone power is not applied, it consumes 128 EU in up to 128 EU/p and converts them into up to four 32 EU/p. All conversions are limited to one per tick. (Converting 2048 EU into 4x512 EU is considered one conversion.)
- If redstone power is applied, it consumes 128 EU in up to 128 EU/p and converts them into one 128 EU/p. All conversions are limited to one per tick.
When using any Transformer, remember that the 3-dotted side means higher voltage and the 1-dotted sides mean lower voltage. You can change the direction the 3-dotted side is facing by right-clicking a 1-dotted face with a Wrench.
Converting to LV:
In order to convert to LV, you must point the input cable (maximum "voltage" is MV or 128 EU/p) to the 3-dotted side and then link any number of output cables from the 1-dotted side. Remember to use input cables that can withstand the packets you are sending in and any cable except Ultra-Low Current Cable for the output.
Converting to MV:
In order to convert to MV, you must apply redstone power through a lever, a repeater or a redstone wire, point the input cables (maximum "voltage" is MV or 128 EU/p) to any 1-dotted side and then link the output cable from the 3-dotted side. Remember to use input cables that can withstand the packets you are sending in and any cable except Ultra-Low Current Cable or Copper Cable for the output.