Power Transformer

This article has not been revised for the current version (***U50-587362***). It was last updated for *LU-356355*. It may contain inaccuracies.
This article has not been revised for the current version (***U50-587362***). It was last updated for *LU-356355*. It may contain inaccuracies.

## Power Transformer

Limits Power flowing through the Transformer to 1000 W.

Connect Batteries on the large side to act as a valve and prevent Wires from drawing more than 1000 W and suffering overload damage.

### Effects

Power capacity: 1000 J
Power runoff: 0 J/cycle

### Auto In

**Green**: Enable
**Red**: Disable

## Materials

### Metal Ore

200 kg

**Power Transformer** is a building intended to separate two circuits to protect against overload damage or to force power into another circuit. It works as a buffer between circuits, providing up to 1000 W from its internal battery to one circuit while consuming power from the other circuit. Since the output is limited, it can safely convert power from a higher wattage source (e.g. Heavi-Watt Wire, which can carry up to 20 kW) down to a lower wattage (e.g. Wire, which can only carry up to 1 kW). Multiple transformers can be connected on a circuit as either consumer or producer.

## Usage

Transformers have an input side (the upper attachment point) and an output side (the lower attachment point). Typically, high-power circuits should enter the transformer through its upper input, and will output up to 1 kW on the output side.

Typically, generators and Batteries will be attached on a Heavi-Watt Wire grid, giving them a 20 kW capacity (allowing up to 33 Coal Generators). Multiple transformers can then be attached to supply power consumers attached to a lower wattage cable able to cross tiles.

In this scenario, batteries on the output side of the transformers would be avoided, as batteries have no limit to output rate. A transformer can resist damage when power draw crosses above 1 kW, but a battery can cross that limit and overload a circuit.

Alternatively, transformers can be used to draw power from a low wattage circuit attached to multiple power producers and output into a higher wattage circuit. This would protect the lower circuit from overload while still providing to the main power circuit and benefitting from the advantages of using low wattage cables.

## Notes

* Transformers will operate without any power cost or charge loss unless disabled by automation or disconnected from an output circuit. In which case, the internal battery will rapidly drain.
* Automation can be used to interrupt power flow in the same way as Switches and Power Shutoffs. However, this will cause power runoff.
* Two transformers drawing from a high wattage input can be paired to fully provide for a Conductive Wire grid safe from overloading.
* A power transformer will produce heat as long as it contains some energy, irrespective of the power input/output.
* The internal battery is limited to a recharge rate of 1 kW (or 200 J per game tick) and acts as a regular battery.
	+ On its own, the battery of a transformer will limit the available power to 1 kW and prevent overload. However, if more batteries or transformers are connected, the increased available power may cause overload damage to happen.

## History

* **EU-279457**: Introduced.
* **QLM1-299745**: Renamed from **Small Power Transformer**.

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