DC direct current
FU fuse
G generator
M motor
HG green light
HR red light
HW white light
HP light plate
K relay
KA(NZ) current relay (negative sequence zero sequence).
KD differential relay
KF flash relay
KH thermal relay
KM intermediate relay
KOF outlet intermediate relay
KS signal relay
KT time relay
KV(NZ) voltage relay (negative sequence zero sequence)
KP polarization relay
KR dry spring relay
KI impedance. Instantaneous presence or absence of relay; Ac relay
KV voltage relay
L line
QF circuit breaker
QS disconnector
T transformer
TA current transformer
TV voltage transformer
W DC bus
YC closing coil
YT tripping coil
p>SE active and reactive apparent power
EUI electromotive force. > f frequency
Q—— switching device of the circuit
FU—— fuse
FR—— thermal relay
KM —— contactor
KA——1, instantaneous contact relay 2, instantaneous presence or absence relay 3, Ac relay
kt-with or without delay relay
sb-button switch q-switching device of circuit
fu-fuse
km-contactor
ka-1, instantaneous contact relay 2, instantaneous presence or absence relay 3, Ac relay
kt-with or without delay relay
sb-button switch
SA changeover switch
ammeter PA
voltmeter PV
active watt-hour meter PJ
reactive watt-hour meter PJR
frequency meter PF
phase meter PPA
maximum demand table (load monitor PM
power factor meter PPF
active power meter PW
reactive power meter PR
reactive ammeter PAR
acoustic signal HA
light signal HS
indicator light HL
red light HR
green light HG
yellow light HY
blue light HB
white light HW. XT
Wire and cable bus W
DC bus WB
Plug-in (feed) Bus WIB
power branch WF emergency lighting branch WE power main WPM lighting main WLM emergency lighting main WEM sliding contact line WT closing small bus WCL controlling small bus WC signal small bus WS flashing small bus. Small bus WPS voltage small bus WV emergency lighting small bus WELM lightning arrester F fuse FU fast fuse FTF drop fuse FF voltage limiting protection device FV capacitor C power capacitor CE forward rotation button SBF reverse button SBR < p. > 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 temperature control switch auxiliary switch ST voltmeter. SA rectifier U silicon controlled rectifier UR rectifier VC inverter UF inverter UI motor M asynchronous motor MA synchronous motor MS DC motor MD wound rotor induction motor MW squirrel-cage motor MC. YV fire valve YF smoke exhaust valve YS electromagnetic lock YL trip coil YT closing coil YC pneumatic actuators YPAYA electric actuator YE heating device (electric heating) FH lighting (light emitting device). EL air conditioner EV electric heater heating element EE induction coil reactor L excitation coil LF arc suppression coil LA filter capacitor LL resistor rheostat R potentiometer RP thermistor RT thermistor RL varistor RPS grounding resistance rg < RS frequency sensitive rheostat RF current limiting resistor RC photovoltaic thermoelectric sensor B pressure transducer BP temperature transducer BT speed transducer BV time measuring sensor BT1BK liquid level measuring sensor BL temperature measuring sensor BHBM.