supply (of electricity)

distribution undertaking

consumer

point of supply

quality of supply

frequency deviation

frequency stability

frequency drift

frequency reduction

source of harmonic voltage

source of harmonic current

harmonic resonance

subsynchronous resonance

ferro-resonance

voltage stability

supply voltage

voltage deviation

line voltage drop

voltage fluctuation

cyclic voltage variation

voltage reduction

voltage collapse

loss of voltage

voltage recovery

voltage dip

flicker voltage range

equivalent flicker voltage fluctuation

flickermeter

voltage unbalance

unbalance factor

balancing of a distribution network

continuity of supply

(supply) continuity criterion

supply disconnection

load recovery

cut-off load

energy not supplied

(load weighted) equivalent interruption duration (annual, monthly)

cost of kWh not supplied

centralized telecontrol (of loads)

deferrable load

series injection of a centralized telecontrol signal

shunt injection of a centralized telecontrol signal

voltage depression

voltage instability

fault (in electric power system)

insulation fault

incident

system incident

maloperation

unwanted operation

failure to operate

damage fault

non-damage fault

permanent fault

transient fault

self-extinguishing fault

self-extinguishing current limit

intermittent fault

resistive fault

dead short

line fault

busbar fault

phase-to-earth fault

phase-to-phase fault (clear of earth)

two-phase-to-earth fault

double faults

multiple faults

three-phase fault

developing fault

turn-to-turn fault

interwinding fault

fault clearance

fault clearance time

closing

opening

automatic reclosing

high speed automatic reclosing

delayed automatic reclosing

successful reclosing

unsuccessful reclosing

single shot reclosing

automatic multiple shot reclosing

final tripping

load transfer

fault location

fault locator

disturbance recorder

highest voltage for equipment

external insulation

internal insulation

self-restoring insulation

non-self-restoring insulation

earth fault factor

insulation of equipment

insulation co-ordination

overvoltage (in a system)

phase-to-earth overvoltage per unit

phase-to-phase overvoltage per unit

temporary overvoltage

transient overvoltage

voltage impulse

voltage surge

front of a voltage impulse

tail of a voltage impulse

lightning impulse

virtual front duration (of a lightning impulse)

switching impulse

time to crest (of a switching impulse)

time to half value (of an impulse)

full lightning impulse

chopped lightning impulse

time to chopping

impulse chopped on the front

impulse chopped on the tail

impulse generator

internal overvoltage

external overvoltage

direct lightning strike

indirect lightning strike

accidental voltage transfer

resonant overvoltage

breakdown

disruptive discharge

back flashover

power frequency withstand voltage

withstand voltage

statistical impulse withstand voltage

fifty per cent disruptive discharge voltage

dielectric dry test

dielectric wet test

artificial pollution test

insulation level

overhead earth wire

(protective) spark gap

lightning conductor

lightning arrester

discharge current (of an arrester)

residual voltage (of an arrester)

non-linear resistor type arrester

expulsion type arrester

lightning impulse protective level (of a protective device)

switching impulse protective level (of a protective device)

protection ratio against lightning impulses

protection ratio against switching impulses

clearance

creepage distance

insulating material

to earth (equipment, an installation or a system)

earthing system

earth electrode

separate earth electrodes

remote earth

earth conductor

earthing network

earth terminal

earth rod

earth plate

earth strip

operational earthing

earthing for work

stray currents

cathodic protection

electric shock

electrocution

electric burn

electric mark

electro-ophthalmia

fibrillating current

freezing current

releasing current

threshold current

live working

safe clearance working

insulated gloves method

bare hand method

insulated tool

insulating tool

working pole

hand pole

universal tool attachment

support pole

protective cover

conductive clothing

aerial lift device with insulating arm

exposure (of a telecommunication line to a power line)

parallelism

oblique exposure

crossing

screening factor

high reliability power line (according to CCITT)

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