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Symbols of Power Switching Devices

The power switching devices are responsible for establishing, sustaining and interrupt the electrical current in a circuit when, because of the electric arc, can not be done by a simple contact.

Symbols of Power Switching Devices

Symbol Description Symbol Description
Static switch symbol Static switch - Semiconductor
Generic symbol
  Static contactor symbol Static contactor - Semiconductor
Contactor open symbol Contactor open
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  Ruptor / Contact breaker symbol, closed contactor Ruptor / Contact breaker
Closed contactor
Disconnector / Isolator symbol Isolator / Disconnector
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  Disconnector / Isolating switch symbol Isolating switch
Disconnector
Isolator with two possible positions symbol Isolator with two possible positions   Manual control disconnector symbol Manual control disconnector
Contactor with automatic disconnection symbol Contactor with automatic disconnection   Disconnector switch with automatic opening symbol Disconnector switch with automatic opening
Static switch symbol Static switch – Semiconductor
Allows current to only flow anticlockwise
  Static switch symbol Static switch - Semiconductor
Allows current to only flow to the right
Disconnector contact with fuse symbol Disconnector contact with fuse   Disconnector with built-in fuse symbol Disconnector with built-in fuse
Contact disconnect switch symbol Contact disconnect switch   Manual control switch disconnector symbol Manual control switch disconnector
Manual control switch with locking device symbol Manual control switch with locking device   Circuit breaker symbol Circuit breaker
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Three-phase Power Switching Devices Symbols

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Disconnect symbol Disconnect   Circuit interrupter symbol Circuit interrupter
Circuit breaker with magnetic OL symbol Circuit breaker with magnetic OL   Circuit breaer with thermal OL symbol Circuit breaer with thermal OL
Circuit breaker with thermal and magnetic OL symbol Circuit breaker with thermal and magnetic OL      
Symbols of switches, contacts and low-power actuators
Symbol of switches with single line - unifilar representation
Symbols of effect switches or dependencies
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