What do the common letters in the circuit mean?

What do the common letters in the circuit diagram mean? QF circuit breaker YV solenoid valve KM contactor KA intermediate relay FU fuse FR thermal relay a current v voltage m motor and so on.

What do the letters in the circuit diagram mean? The circuit diagram of middle school is generally only R, I and U. R stands for resistance, I stands for current and u stands for voltage. (Pretending to have a picture to force an answer)

Find the meaning of common letter codes in building structure drawings? There are too many things represented by symbols in architectural drawings. You can read books or something

@ stands for rebar spacing.

φ indicates the rebar type and the list of CAD shortcut keys.

Establish a three-dimensional array 3A

Create a three-dimensional surface 3F

A polyline 3P composed of straight line segments is established in three-dimensional space.

Align objects with other objects in 2D and 3D space.

Loading AutoLISP, ADS and ARX application AP

Establishing arc a

Calculate the area and perimeter AA of an object or defined area.

Creates a copy of multiple objects arranged in a specified way.

Management function for executing external database commands.

Output the link information AEX of the selected object.

Manage links between objects and external databases.

Display and edit tabular data and create links and selection sets ARO.

Create selection sets from rows linked to text selection sets and graphic selection sets.

Execute the structured query language (SQL) statement ASQ.

Create attribute definition-in

Change attribute information independently of the block definition

Fill the closed area h or BH with a pattern.

Create a block definition from the selected object -B

Define block b with dialog box

Create a region or polyline BO with a closed area.

Create an area or polyline with a closed area (using the command line) -BO

Partially delete an object or split it into two parts BR

Chamfering object CHA

Modify the properties of an existing object -CH

Draw a circle c according to the center of the circle and the diameter or radius

Copy object CO or CP

Create an attribute definition at

Edit the variable attribute ATE of a single block

Modify the color, layer, line type and thickness CH of the object.

Set the color of the new object

Edit text and attribute definitions

Show grips and set color groups.

Create and modify dimension style d

Insert a block or another graph i.

Control the properties of existing objects to maintain objects.

Modify the object name as

Set the drawing aid RM

Set the object selection mode se

Manage the defined user coordinate system UC.

Select the preset user coordinate system UCP.

Controls the display format and accuracy of coordinates and angles.

Create and restore view v

Set the three-dimensional observation direction VP

Create an aligned linear dimension DAL or DIMALI.

Create an angular dimension DAN or DIMANG

Mark DBA or DIMBASE continuously from the first extension line of the previous or selected label.

Create center marks or centerline DCE of circles and arcs.

DCO or dimension control is continuously marked on the second extension line of the previous or selected dimension.

Create diameter dimensions DDI or DIMDIA for circles and arcs.

Edit dimensions or dimensions

Create a linear dimension DLI or Dimling.

Create coordinate points to mark DOR or DIMORD.

Replace the labeling system variable DOV or Dimov.

Create radius dimension DRA or DIMRAD for circles and arcs.

Create and modify dimension styles DST or DIMSTY on the command line.

Move and rotate the dimension text size.

Measure the distance and angle di between two points.

Split point objects or blocks at equal intervals along the length or circumference of the object.

Draw solid circles and rings.

Modify the display order of images and other objects.

Open the bird's eye view window AV.

Display DT on the screen when entering text.

Define a parallel projection or perspective DV

Create an ellipse or elliptical arc EL

Delete object e from the drawing.

Disassemble the assembly object into object component X.

Save the object EXP in another file format.

Extend one object to another.

Create a 3D solid extension by stretching an existing 2D object.

Fillet the object with fillet F.

According to the characteristics of related objects, the filter list fi used when selecting related objects is established.

Creates a named selection set g of objects.

Use the command line to create a selection set -G

Fills the specified boundary area with the pattern-h.

Modify an existing hatch object

Hidden line HI is not displayed when regenerating 3D model.

Insert the image im into AutoCAD graphics files of various formats.

Insert an image using the command line -IM

Controls the brightness, contrast and gradient IAD of the selected image.

Defines a new image object IAT and attaches it to the current drawing.

Create a new clipping boundary ICL for a single image object

Import files such as 3DS/DXF/EPS /SAT/WMF IMP into AutoCAD.

Inserts a named block or graph into the current graph-i.

Insert linked or embedded object IO

Find out the interference areas of two or more three-dimensional entities and establish a three-dimensional combined entity INF with common parts.

Create a composite entity or region from the intersection of two or more entities or regions.

Management la

Execute the LAYER command on the command line.

Create a leader to connect the annotation with the geometric feature le or leader.

Slender object l

Create, load, and set linetypes

Use the command line to create, load and set linetypes -LT

Displays the database information LI or LS of the selected object.

Set the linear scale factor LTS.

Copy the characteristics of one object to several other objects.

Place me at the specified interval between point objects or blocks.

Create an image copy of the object MI

Establish multiline ML

Moves the object m in a specified direction by a specified distance.

Switch from paper space to model space viewport in milliseconds.

Create multiline text t or MT

Use the command line -T to create multiline text

Create a floating viewport and open an existing floating viewport MV.

Create equidistant lines of objects, such as concentric circles, parallel lines and parallel curves.

Set the execution object capture mode and modify the target frame size OS.

Use the command line to set the execution object capture mode and modify the target frame size -OS

Move the graph p displayed in the current viewport.

Use the command line to move viewport -P p.

Insert clipboard data and control data format PA

Edit polylines and 3D polygonal meshes

Establish two-dimensional polyline PL

Print a drawing to a plotter, printer, or file printer.

Create point object po

Creates a regular polygon pol represented by a polyline.

Set PR of custom AutoCAD system parameters.

Display the effect of graphic preprint.

Switch from model space viewport to paper space PS

Delete unused named objects in the database, such as blocks or layers PU.

Exit AutoCAD exit

Draw a rectangular polyline rec

Refresh and display the current viewport R.

Refresh and display all viewports.

Regenerates the drawing and refreshes the current viewport.

Regenerates the drawing and refreshes all viewports REA.

Creates an elevation domain object rule from a selected set of existing objects.

Modify object name-Ren

Create a realistic rendered image RR of a 3D wireframe or solid model.

Rotate a 2D object along an axis to create a solid rev.

Rotate the object RO around the base point.

Set the rendering system configuration RPR.

Enlarge or reduce the object SC in equal proportion in the x, y and z directions.

Execute a series of commands SCR from the script file.

Construction of elevation profile with section plane and three-dimensional intersection line

List system variables and modify variable value sets.

Displays the SHAded image sha of the current viewport graph.

Cutting a group of solid SL with plane

Specifies that the cursor moves SN at specified intervals.

Create a 2D filled polygon.

Check the spelling of the text in the drawing.

Create a quadratic or cubic spline spl

Edit spline object type

Move or stretch an object.

Create a naming style ST

Create a combined area or entity SU with a difference set.

Calibrate, configure, turn on and turn off the installed digitizer TA.

Sets the thickness th of the current 3D solid.

Control access to paper space and control viewport behavior.

Create Geometric Tolerances Dimensional Tolerances

Show, hide and customize toolbars to

Create a circular entity TOR

Trim the object TR with trimming edges defined by other objects.

Create a merged region or entity UNI through a joint operation.

Set the display format and precision of coordinates and angles -UN

Saving and restoring named views -V

Set the viewing direction of the 3D orthogonal view of the drawing -VP

Write the block object into a new drawing file w

Create a 3D solid so that the tip of its slope is in the positive direction of the X axis.

Attach an xref to XA in the current drawing.

Bind xref dependency symbols to drawing XB.

Use the command line to execute the XBINDW command -XB.

Defines an external reference or block clipping boundary, and sets the front clipping plane and the back clipping plane XC.

Create an infinite straight line, which is called the reference line XL.

Controls the xref xr in the drawing.

Use the command line to execute the XREF command -XR.

Enlarges or reduces the visual dimension z of the current viewport object.

What does the letter code in the circuit diagram mean? Is it like I = U/R?

The above formula represents current = voltage divided by resistance.

What does CP stand for in the circuit diagram CP stands for clock pulse input;

Pulse usually refers to short-term fluctuating electric shock (voltage or current) often used in electronic technology. The main features are waveform, amplitude, width and repetition frequency. [1] Compared with continuous signal, pulse is a signal that appears for a short time in the whole signal period, and there is no signal in most signal periods. Just like a person's pulse. Now it generally refers to a digital signal, which is already a signal with half a period. The signal in the computer is a pulse signal, also known as a digital signal. In addition, pulses are also used to express emotional impulses and demands.

Help: The letters in the circuit diagram of Volkswagen represent too many meanings. You are talking about the colors of circuit wires, such as SW black, BR brown, RD red, GE yellow, GN green, BL blue, VI purple, GR gray and WS white.

You type it and I'll explain it for you.

I have the alphabet of that book.

Electrician's common letter code ammeter PA

Voltmeter PV

Active watt-hour meter PJ

Reactive watt-hour meter PJR

Frequency table PF

PPA phase table

Maximum demand meter (load monitor) PM

PPF power factor table

Active power meter PW

Reactive power meter PR

Reactive ammeter parameters

Acoustic signal HA

Optical signal HS

Indicator lamp HL

Red light HR

Green mercury lamp

Yellow lamp HY

Hemoglobin blue

White light hardware

Connecting line XB

Plug XP

Socket XS

Terminal board XT

Wire, cable, bus w

Dc bus WB

Plug-in (feed) bus WIB

Power branch WP

WL lighting branch line

Emergency lighting branch WE

Power trunk line WPM

Lighting suitcase WLM

WEM emergency lighting trunk line

Sliding contact line WT

Close the WCL minibus

Control of minibus toilets

Minibus WS signal

Flash minibus WF

Accident sound minibus WFS

Preview audio minibus WPS

Small voltage bus WV

Emergency lighting minibus WELM

Lightning arrester f

Fuse symbol

Fast fuse FTF

Drop fuse FF

Voltage limiting protection device FV

Capacitance c

Power capacitor CE

Forward button SBF

Reverse button SBR

Stop button SBS

Panic button SBE

Test button SBT

Reset button SR

Limit switch SQ

Proximity switch SQP

Manual control switch SH

Time control switch SK

Liquid level control switch SL

Humidity control switch SM

Pressure control switch SP

Speed control switch SS

Auxiliary switch ST temperature control switch

Voltmeter changeover switch SV

Ammeter changeover switch SA

Rectifier u

Silicon controlled rectifier UR

The control circuit has a rectifier VC with power supply.

Inverter ultrafiltration

Converter UC

Inverter user interface

Motor m

Asynchronous motor MA

Synchronous motor MS

Dc motor MD

Wound rotor induction motor MW

Squirrel cage motor MC

Electric valve YM

Solenoid valve YV

YF fire damper

Smoke exhaust valve YS

Electromagnetic lock YL

Trip coil YT

Closed coil YC

Pneumatic actuators YPA, Asia

Electric actuator blade

Heating device (electric heating) FH

Lighting lamp (lighting device) EL

Electric air conditioner

Electric heater heating element EE

Inductor coil, reactor l

Low frequency excitation coil

Arc suppression coil LA

Filter capacitor LL

Resistor r

Potentiometer RP

Thermistor RT

Photosensitive resistor RL

Rheostat RPS

Grounding resistance RG

Discharge resistance RD

Starting rheostat RS

Radio frequency sensitive rheostat

Current limiting resistor RC

Photoelectric cell, thermoelectric sensor b

Pressure converter BP

Temperature converter BT

Speed converter BV

Time measuring sensor BT 1, black

Liquid level measuring sensor BL

Temperature measuring sensors BH, BM

Auxiliary text name

number of character

A current of water

imitate

Alternating current

a letter

automatic

University teachers' association

ACC acceleration

Add others

adjustable

AUX auxiliary

ASY asynchrony

B

BRK braking

black

BL blue

Backward bandwidth

C control

clockwise

Counterclockwise

Delay (delay)

D differential

D Hao

D decline

DC·DC

Decimal subtraction

E grounding

EM emergency

F express

Feedback feedback

Forward

GN green

H height

Entering

INC Zeng

IND induction

L Zuo

L limit

L low

Los Angeles atresia

M master

M clock

M midline

M

manual

neutral line

Close and disconnect

On (off)

Output output

P pressure

Pest protection

PE protective grounding

PEN is used to protect grounding wire and neutral wire.

PU ungrounded protection

R record

right side

R anti

red

rare

RST reset

RES standby

run

S signal

First start

S

Setting and positioning

Saturation saturation

STE dance steps

STP stop

Synchronization synchronization

Test temperature

T time

Noise-free (anti-interference) grounding

vacuum

V speed

Volt voltage

Wh white

Huang Ye

What does the circle in the circuit diagram mean? The former represents a voltage source, and the voltage across the element is constant. The latter is a current source whose output current is constant.