Instrument transformers are high accuracy class electrical devices used to isolate or transform voltage or current levels.

The Institute of Electrical and Electronics Engineers (IEEE) is a professional association for electronic engineering and electrical engineering (and associated disciplines).

Instantaneous power in an electric circuit is the rate of flow of energy past a given point of the circuit.

The total cumulative installed electricity generation capacity.

An inrush current limiter is a component used to limit inrush current to avoid gradual damage to components and avoid blowing fuses or tripping circuit breakers.

In a typical power distribution grid, electric transformer power loss typically contributes to about 40-50% of the total transmission and distribution loss.

A measure of cooling efficiency for heat pump equipment, expressed as the cooling energy removed from the space (Btu) divided by the electric energy consumed to provide that cooling (W).

Energy efficiency gap refers to the improvement potential of energy efficiency or the difference between the cost-minimizing level of energy efficiency and the level of energy efficiency actually realized.

The goal to reduce the amount of energy required to provide products and services and can also reduce effects of air pollution.

Energy economics is a broad scientific subject area which includes topics related to supply and use of energy in societies.

An energy drink is a type of drink containing stimulant compounds, usually caffeine, which is marketed as providing mental and physical stimulation (marketed as "energy", but distinct from food energy).

Energy distance is a statistical distance between probability distributions.

Energy development is the field of activities focused on obtaining sources of energy from natural resources.

The amount of energy stored in a given system or region of space per unit volume.

Energy crops are low-cost and low-maintenance crops grown solely for energy production by combustion (not for food).

An energy crisis is any significant bottleneck in the supply of energy resources to an economy.

Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms.

Energy consumption is the amount of energy or power used.

Energy conservation is the effort made to reduce the consumption of energy by using less of an energy service.

In relativistic classical field theories of gravitation, particularly general relativity, an energy condition is one of various alternative conditions that can be applied to the matter content of the theory when it is either not possible or desirable to specify this content explicitly.