Galvanometer pa voltmeter pv
Active watt-hour meter pj reactive watt-hour meter pjr
Frequency table pf phase table ppa
Maximum demand meter (load monitor) pm
Power factor meter ppf active power meter pw
Reactive power meter pr reactive ammeter par
Acoustic signal ha optical signal hs
Indicator light hl red light hr
Green lamp mercury yellow lamp hy
Blue hb white hw
Connector xb plug xp
Socket xs terminal board xt
Wire, cable, bus w DC bus wb
Plug-in (feed) bus wib power supply branch wp
Symbols and letters of electronic components
Lighting branch wl emergency lighting branch we
Power supply trunk wpm lighting trunk wlm
Emergency lighting trunk wem sliding contact line wt
Close the small bus wcl to control the small bus wc.
Signal small bus ws flash small bus wf
Accident sound passenger car wfs early warning sound passenger car wps
Voltage minibus wv emergency lighting minibus welm
Lightning arrester f fuse fu
Fast fuse ftf drops fuse ff.
Voltage limiting protection device fv capacitor c
Power capacitor ce rotates the button sbf in the forward direction.
Reverse button sbr stop button sbs
Panic button sbe test button sbt
Symbols and letters of electronic components
Reset button sr limit switch sq approaches 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
Temperature control switch, auxiliary switch st
Voltmeter changeover switch sv ammeter changeover switch sa
Symbols and letters of electronic components
Rectifier u SCR ur control circuit rectifier vc with power supply
Frequency converter motor
Asynchronous motor ma synchronous motor ms DC motor md
Wound rotor induction motor mw squirrel cage motor mc
Electric valve ym solenoid valve yv fire valve yf smoke exhaust valve ys electromagnetic lock yl
Trip coil yt close coil yc pneumatic actuators ypa, ya electric actuator ye.
Heating device (electric heating) fh lighting lamp (lighting device) el air conditioning ev
Electric heater heating element ee induction coil, reactor L
Excitation coil lf arc suppression coil la filter capacitor ll
Resistance r potentiometer rp
Thermistor rt photosensitive resistor rl rheostat rps grounding resistor rg
The discharge resistor rd starts the rheostat rs frequency sensitive rheostat rf current limiting resistor rc.
Photoelectric cell, thermoelectric sensor B pressure sensor bp temperature sensor bt speed sensor bv
Time measurement sensor bt 1, bk liquid level measurement sensor bl temperature measurement sensor bh, bm.
FS is the abbreviation of full scale, indicating the range of measuring range.