Letter designations (codes) of electrical circuit elements on diagrams. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Electrician

Letter designations (codes) of electrical circuit elements on diagrams. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electrician's Handbook

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B - converters of non-electrical quantities into electrical ones (except for generators and power supplies) and electrical quantities into non-electrical ones, general designation; including VA - loudspeaker, BF - telephone (capsule),

BM - microphone, BQ - piezoelectric element, BS - pickup.

C is a capacitor.

EL - lighting lamp.

EK - heating element.

FU - fuse fuse.

FV - bit element.

G - generators, power supplies, crystal oscillators.

GB - a battery of galvanic cells, accumulators.

ON - sound alarm device.

HL - light signaling device.

KM - electromagnetic contactor, starter.

KK - electrothermal relay.

CT - time relay.

KV - voltage relay.

L - inductor, choke.

LL - choke of a fluorescent lamp.

M is the engine.

R - measuring device, general designation; including RA - ammeter, PF - frequency meter, PR - reactive energy meter (ohmmeter), RT - time meter (hours), PV - voltmeter, PW - wattmeter. R is a resistor.

Q - switches, disconnectors, short circuiters, general designation.

SA - switch or switch.

SB - push-button switch.

SF - automatic switch.

T - transformer, autotransformer.

TV - current transformer.

TA - voltage transformer.

V - semiconductor devices, general designation; including VD - diode, VT - transistor.

WA - antenna.

XP - pin (plug).

XS - socket (socket).

XT - collapsible connection.

XW - high-frequency connector.

YA - electromagnet.

The number placed next to the designation of one or another element in the electrical circuit is the serial number of the element within this circuit.

Author: Korshevr N.G.

See other articles Section Electrician's Handbook.

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