Electrical & Electronic Symbols

Relay Symbols and Electromagnets

The relay are switching electrical devices activated by signals. Most of the time, a small voltage or current is used to switch other voltages or higher currents that may be electromechanical or fully electronic type.
The electromagnetic controls are activated thanks to electromagnetic fields generated by electricity.

Symbols of Relays / Electromagnet Controls
Symbol Description Symbol Description
Relay (Coil) symbol Relay (Coil)
Generic symbol		   Relay (Coil) symbol Relay (Coil)
Generic symbol
Relay symbol Relay   Double coil relay symbol Double coil relay
Double coil relay symbol Double coil relay   Symbol of relay windings in opposite directions Two operating relay windings in opposite directions
Double coil relay symbol Double coil relay   Overcurrent relay symbol Overcurrent relay
Fast deactivation relay symbol Fast deactivation relay   Differential current relay symbol Differential current relay
Slow excitation relay symbol Slow excitation relay   Slow deactivation relay symbol Slow deactivation relay
Symbol of High speed relay, for both the connection and the disconnection High speed relay, for both the connection and the disconnection   Maximum voltage relay symbol Maximum voltage relay
Fast relay symbol Fast relay   Symbol of relay actuated by defective voltage Relay actuated by defective voltage
Card operated relay symbol Card operated relay   Relay not affected by AC symbol Relay not affected by AC
Differential relay symbol Differential relay   Polarized relay symbol Polarized relay
+ Info
Magnetically polarized relay symbol Magnetically polarized relay   Delayed action relay on disconnection symbol Delayed action relay on disconnection
Electromagnetic relay symbol Electromagnetic relay   Thermal relay symbol Thermo-relay
Thermal relay
Electronic relay / Solid-state relay symbol Solid-state relay
Electronic relay
+ Info		   Stepping or pulse relay symbol Stepping or pulse relay
Symbols of remote control relay Remote control relay   Pulse relay symbol Pulse relay
Remnant relay symbol Remnant relay   Intermittent relay symbol Intermittent relay
Relay remnant symbol Relay remnant   Electric valve / Solenoid valve symbol Electric valve / Solenoid valve
+ Info
AC relay symbol AC relay   Relay rest with delayed operation symbol Relay rest with delayed operation
Relay mechanical resonance symbol Relay mechanical resonance
e.g. 25Hz		   Step relay symbol Step relay
Mechanical interlock relay
Relay with light pilot symbol Relay with light pilot      

Measuring Relay Symbols
Go to the top of the page
Maximum voltage relay symbol Maximum voltage relay   Minimun voltage relay symbol Minimun voltage relay
Low impedance relay symbol Low impedance relay   Relay of voltage absence symbol Relay of voltage absence
Detection relay with divided conductor symbol Detection relay with divided conductor   Low power relay symbol Low power relay
Symbol of Detector relay of short-circuit between coils Detector relay of short-circuit between coils   Reverse current relay symbol Reverse current relay
Detector relay of failure in tri-phasic lines symbol Detector relay of failure in tri-phasic lines   Relay maximum and minimum current symbol Maximun and minimun current relay
Relay blocked rotor symbol Relay blocked rotor   Frequency relay symbol Frequency relay
Automatic reclosing relay symbol Automatic reclosing relay   Symbol of the overcurrent relay with two measuring elements and a range of sample Overcurrent relay with two measuring elements and a range of sample
e.g. 1...5A sample range
Overcurrent relay with delayed action symbol Overcurrent relay with delayed action   Measuring relay symbol Measuring relay
The asterik is replaced by letters or symbols related to the relay

Electromagnet Symbols / Electromagnetic Controls
Go to the top of the page
Electromagnet symbol Electromagnet
Electromagnetic drive
+ Info		   electromagnet symbol, solenoid operatec Electromagnet
Electromagnet, symbol USA Electromagnet
Electromagnetic drive
US Symbol		   Contact with electromagnetic anchoring mechanism symbol Contact with electromagnetic anchoring mechanism
Reed switch / Reed relay symbol Reed relay / Reed switch
+ Info		      

Symbols of Relay Contacts
Go to the top of the page
Open contacts symbol Open contacts
NO - Normally open
+ Info		   Closed contacts symbol Closed contacts
NC - Normally closed
Open contacts symbol Open contacts
NO - Normally open		   Closed contacts symbol Closed contacts
NC - Normally closed
Open contacts symbol Open contacts
NO - Normally open		   Closed contacts symbol Closed contacts
NC - Normally closed
Contacts work symbol Contacts work   Contacts resting symbol Contacts resting
Switching contacts symbol Switching contacts   Switch contacts successive symbol Switch contacts successive
Commutator / Switch of relay symbol Commutator / Switch   Commutator / Switch of relay symbol Commutator / Switch

Relay device symbols with contacts
Go to the top of the page
Relay symbol / solenoid operated Relay / solenoid operated
(Coil and Switch)
Generic symbol
+ Info		   Relay symbol / solenoid operated Relay / solenoid operated
Relay symbol / solenoid operated Relay / solenoid operated   Relay symbol with push button Relay / solenoid operated
Coil and pushbutton
Relay switch symbol Relay switch   Contactor symbol Contactor
Relay - SPST symbol Relay - SPST
Single pole, single throw		   Relay - SPDT symbol Relay - SPDT
Single pole, double thorw
Relay - DPST symbol Relay - DPST
Double pole, single thorw		   Relay - DPDT symbol Relay - DPDT
Double pole, double thorw
Relay - DPST symbol Relay - DPST
Double pole, single thorw		   Relay - 3PDT symbo Relay - 3PDT
Three pole, double thorw
Relay - 3PST symbol Relay - 3PST
Three pole, single thorw		      
Picture gallery of relays and electromagnets
Download symbols
Follow us...
facebook_logo  logo  twitter_logo