Electricity

Electricity

A database referring to the existence of a flow of electric charge.

Industry: Utilities

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Electricity

Dynamic DNS

Electrical equipment; Electricity

This is a system by which Internet Service Providers temporarily assign IP addresses. This allows the reassignment of the address when no longer in use.

Earth fault protection system

Electrical equipment; Electricity

A protection system which is designed to excite during faults to earth.

Earthing transformer

Electrical equipment; Electricity

A three-phase transformer intended essentially to provide a neutral point to a power system for the purpose of grounding.

Eddy current

Electrical equipment; Electricity

The current that is generated in a transformer core due to the induced voltage in each lamination. It is proportional to the square of the lamination thickness and to the square of the frequency.

Electrical Equipment Representatives Association (EERA)

Electrical equipment; Electricity

EERA is an association of electrical manufacturers representatives. Additional information on EERA can be found at www.eera.org. Young & Company is a member of EERA.

Effective internal resistance (battery)

Electrical equipment; Electricity

The apparent opposition to current within a battery that manifests itself as a drop in battery voltage proportional to discharge current. Its value is dependent on battery design, state-of-charge, ...

Effective range

Electrical equipment; Electricity

The range of values of the characteristic quantity or quantities. For example the energising quantities to which the relay will respond and satisfy the requirements to precision.