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Electrical Symbols — Switches and Relays

Electrical Symbols — Switches and Relays
In electrical engineering, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another. The mechanism of a switch may be operated directly by a human operator to control a circuit (for example, a light switch or a keyboard button), may be operated by a moving object such as a door-operated switch, or may be operated by some sensing element for pressure, temperature or flow. A relay is a switch that is operated by electricity. Switches are made to handle a wide range of voltages and currents; very large switches may be used to isolate high-voltage circuits in electrical substations. 26 libraries of the Electrical Engineering Solution of ConceptDraw PRO make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.
The vector stencils library "Switches and relays" contains 58 symbols of electrical contacts, switches, relays, circuit breakers, selectors, connectors, disconnect devices, switching circuits, current regulators, and thermostats for electrical devices.
"In electrical engineering, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another.
The most familiar form of switch is a manually operated electromechanical device with one or more sets of electrical contacts, which are connected to external circuits. Each set of contacts can be in one of two states: either "closed" meaning the contacts are touching and electricity can flow between them, or "open", meaning the contacts are separated and the switch is nonconducting. The mechanism actuating the transition between these two states (open or closed) can be either a "toggle" (flip switch for continuous "on" or "off") or "momentary" (push-for "on" or push-for "off") type.
A switch may be directly manipulated by a human as a control signal to a system, such as a computer keyboard button, or to control power flow in a circuit, such as a light switch. Automatically operated switches can be used to control the motions of machines, for example, to indicate that a garage door has reached its full open position or that a machine tool is in a position to accept another workpiece. Switches may be operated by process variables such as pressure, temperature, flow, current, voltage, and force, acting as sensors in a process and used to automatically control a system. ... A switch that is operated by another electrical circuit is called a relay. Large switches may be remotely operated by a motor drive mechanism. Some switches are used to isolate electric power from a system, providing a visible point of isolation that can be padlocked if necessary to prevent accidental operation of a machine during maintenance, or to prevent electric shock." [Switch. Wikipedia]
"A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits as amplifiers: they repeated the signal coming in from one circuit and re-transmitted it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.
A type of relay that can handle the high power required to directly control an electric motor or other loads is called a contactor. Solid-state relays control power circuits with no moving parts, instead using a semiconductor device to perform switching. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called "protective relays"." [Relay. Wikipedia]
The shapes example "Design elements - Switches and relays" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Switch and relay symbols
Switch and relay symbols, two way contact, time delay make, open switch, time-delay closing, TDC, time delay make, normally open, time delay break, normally closed, time delay break, closed switch, time-delay opening, TDO, thermostat, temperature switch, temperature sensitive switch, temperature actuated switch, switch disconnector, isolating-switch, stay put, contact without spring return, spring return, make, spring return, break, spring return, shorting selector, make-before-break, shorting, bridging, contact transfer, selector switch, break-before-make, nonshorting, nonbridging, contact transfer, safety interlock, circuit opening, relay contacts, relay coil, relay, pushbutton, make, circuit closing, mushroom head, push-pull head, pushbutton, break, circuit opening, mushroom head, push-pull head, pushbutton, 2-circuit, circuit opening, break, proximity limit switch, directly actuated, spring returned, normally closed, pressure actuated switch, pilot light, passing make-contact, mercury switch, manual switch, manually operated switch, make contact, liquid level actuated switch, limit switch, directly actuated, spring returned, normally open, limit switch, directly actuated, spring returned, normally closed, limit switch, isolator, inertia switch, gas flow actuated switch, fuse, flow actuated, circuit breaker, change-over contact, break contact, SPST, single-pole, single-throw, switch, SPDT, single-pole, double-throw, switch, DPST, double-pole, single-throw, switch, DPDT, double-pole, double-throw, switch, 4 position, switch, 3 position, three-position, switch, 2 position, switch,
Used Solutions
The vector stencils library "Switches and relays" contains 58 symbols of electrical contacts, switches, relays, circuit breakers, selectors, connectors, disconnect devices, switching circuits, current regulators, and thermostats for electrical devices.
Use these shapes for drawing electrical diagrams in the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-electrical
SPST
SPST, SPST, single-pole, single-throw, switch,
SPDT
SPDT, SPDT, single-pole, double-throw, switch,
DPST
DPST, DPST, double-pole, single-throw, switch,
DPDT
DPDT, DPDT, double-pole, double-throw, switch,
Make contact
Make contact, make contact,
Break contact
Break contact, break contact,
Two way contact
Two way contact, two way contact,
Passing make-contact
Passing make-contact, passing make-contact,
Spring return
Spring return, spring return,
Stay put
Stay put, stay put, contact without spring return,
Limit switch
Limit switch, limit switch,
Circuit breaker
Circuit breaker, circuit breaker,
Spring return 2
Spring return 2, spring return, make,
Spring return 3
Spring return 3, spring return, break,
Limit switch n/o
Limit switch n/o, limit switch, directly actuated, spring returned, normally open,
Limit switch n/c
Limit switch n/c, limit switch, directly actuated, spring returned, normally closed,
2 position switch
2 position switch, 2 position, switch,
3 position switch
3 position switch, 3 position, three-position, switch,
4 position switch
4 position switch, 4 position, switch,
Manual switch
Manual switch, manual switch, manually operated switch,
Pushbutton make
Pushbutton make, pushbutton, make, circuit closing, mushroom head, push-pull head,
Pushbutton break
Pushbutton break, pushbutton, break, circuit opening, mushroom head, push-pull head,
Pushbutton 2-circuit
Pushbutton 2-circuit, pushbutton, 2-circuit, circuit opening, break,
Selector switch
Selector switch, selector switch, break-before-make, nonshorting, nonbridging, contact transfer,
Shorting selector
Shorting selector, shorting selector, make-before-break, shorting, bridging, contact transfer,
Proximity limit switch
Proximity limit switch, proximity limit switch, directly actuated, spring returned, normally closed,
Time delay make
Time delay make, time delay make, open switch, time-delay closing, TDC,
Time delay break
Time delay break, time delay break, closed switch, time-delay opening, TDO,
Time delay make 2
Time delay make 2, time delay make, normally open,
Time delay break 2
Time delay break 2, time delay break, normally closed,
Safety interlock
Safety interlock, safety interlock, circuit opening,
Flow actuated
Flow actuated, flow actuated,
Liquid level actuated
Liquid level actuated, liquid level actuated switch,
Liquid level actuated 2
Liquid level actuated 2, liquid level actuated switch,
Gas flow actuated
Gas flow actuated, gas flow actuated switch,
Pressure actuated
Pressure actuated, pressure actuated switch,
Temperature actuated
Temperature actuated, temperature actuated switch,
Thermostat
Thermostat, thermostat,
Temperature switch
Temperature switch, temperature switch, temperature sensitive switch,
Inertia switch
Inertia switch, inertia switch,
Mercury switch
Mercury switch, mercury switch,
Mercury switch 2
Mercury switch 2, mercury switch,
Fuse
Fuse, fuse,
Switch disconnector
Switch disconnector, switch disconnector, isolating-switch,
Isolator
Isolator, isolator,
Change-over contact
Change-over contact, change-over contact,
Relay contacts
Relay contacts, relay contacts,
Relay coil
Relay coil, relay coil,
Pilot light
Pilot light, pilot light,
Pilot light, push-to-test
Pilot light, push-to-test, pilot light,
Relay, alternating-current
Relay, alternating-current, relay,
Relay, magnetically polarized
Relay, magnetically polarized, relay,
Relay, slow-operate
Relay, slow-operate, relay,
Relay, slow-release
Relay, slow-release, relay,
Relay
Relay, relay,
Relay, high speed
Relay, high speed, relay,
Relay, mechanically latched
Relay, mechanically latched, relay,
Relay, permanent
Relay, permanent, relay,
Used Solutions
The vector stencils library Video surveillance contains 15 symbols of electronic closed-circuit television (CCTV) equipment, digital video cameras and recording devices and covert video equipment.
"Closed-circuit television (CCTV) is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint, or mesh wireless links. Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that may need monitoring such as banks, casinos, airports, military installations, and convenience stores.
In industrial plants, CCTV equipment may be used to observe parts of a process from a central control room, for example when the environment is not suitable for humans. CCTV systems may operate continuously or only as required to monitor a particular event. A more advanced form of CCTV, utilizing digital video recorders (DVRs), provides recording for possibly many years, with a variety of quality and performance options and extra features (such as motion-detection and email alerts). More recently, decentralized IP cameras, some equipped with megapixel sensors, support recording directly to network-attached storage devices, or internal flash for completely stand-alone operation. Surveillance of the public using CCTV is particularly common in many areas around the world." [Closed-circuit television. Wikipedia]
Use the design elements library Video surveillance to design the layout plans of security and access systems, and internal and external video surveillance and security control monitoring systems using the ConceptDraw PRO diagramming and vector drawing software.
The shapes library Video surveillance is included in the Security and Access Plans solution from the Building Plans area of ConceptDraw Solution Park.
Video surveillance symbols
Video surveillance symbols, video multiplexer, video motion detector, video control keyboard, video keyboard, security window screen, alarm, screening device, recorder, push button, motion detector, monitor, manually operated switch, switch, manual, glass break sensor, camera, pan, tilt, zoom, camera, bi-static beam sensor, automatic monitoring switch, switch, automatic ,
Used Solutions
The vector stencils library "Alarm and access control" contains 80 shapes of digital proximity equipment, locking hardware, and access control equipment. Use it for drawing security and access plans of intrusion systems, time and attendance systems, and card and code access control security systems with ConceptDraw PRO software extended with the Security and Access Plans solution from the Building Plans area of ConceptDraw Solution Park.
Card reader with keypad
Card reader with keypad, card reader, keypad,
Biometric access
Biometric access, biometric access reader, biometric access,
Card access
Card access, card access reader, card access,
Keypad device
Keypad device, keypad device,
Keypad
Keypad, keypad,
Security keypad
Security keypad, security keypad,
Horn / siren
Horn / siren, horn, siren,
Weatherproof horn / siren
Weatherproof horn / siren, weatherproof, horn, siren,
Horn / strobe
Horn / strobe, horn, strobe,
Strobe
Strobe, strobe,
Card reader with time
Card reader with time, card reader, time, attendance,
Turnstile
Turnstile, turnstile,
Revolving door
Revolving door, revolving door,
Traffic arm
Traffic arm, traffic arm,
Vehicle loop detector
Vehicle loop detector, vehicle loop detector,
Smoke detector
Smoke detector, smoke detector,
Heat detector
Heat detector, heat detector,
Gas detector
Gas detector, gas detector,
Carbon monoxide detector
Carbon monoxide detector, carbon monoxide detector, CO detector,
Flood sensor
Flood sensor, flood sensor,
Electronic lock
Electronic lock, electronic lock,
Exit device
Exit device, exit device,
Pushbutton
Pushbutton, pushbutton,
Panic button
Panic button, panic button,
Camera with keypad
Camera with keypad, camera, keypad,
Camera
Camera, camera,
Camera with intercom
Camera with intercom, camera, intercom,
Camera with card reader
Camera with card reader, camera, card reader,
Security window screen
Security window screen, security window screen,
Window contact sensor
Window contact sensor, window contact sensor,
Vibration / shock sensor
Vibration / shock sensor, vibration sensor, shock sensor,
Screen alarm
Screen alarm, screen alarm,
Glass break detector
Glass break detector, glass break detector,
Door contact sensor
Door contact sensor, door contact sensor,
Floor mat
Floor mat, floor mat,
Driveway sensor
Driveway sensor, driveway sensor,
Overhead door contact sensor
Overhead door contact sensor, overhead door contact sensor, door contact sensor,
Wall motion sensor
Wall motion sensor, wall motion sensor, motion sensor,
Floor motion sensor
Floor motion sensor, floor motion sensor, motion sensor,
Security control unit
Security control unit, security control unit,
Security door contact
Security door contact, security door contact,
Security control panel
Security control panel, security control panel,
Security card reader
Security card reader, security card reader,
Motion detector
Motion detector, motion detector,
Master intercom
Master intercom, master intercom,
Magnetic lock, security door alarm
Magnetic lock, security door alarm, magnetic lock, security door alarm,
Intercom unit
Intercom unit, intercom unit,
Electric door strike
Electric door strike, electric door strike,
Electric door opener
Electric door opener, electric door opener,
Door buzzer
Door buzzer, door buzzer,
Door chime
Door chime, door chime,
Doorbell
Doorbell, doorbell,
Volumetric capacity detector
Volumetric capacity detector, volumetric capacity detector,
Siren
Siren, siren,
Receiver
Receiver, receiver,
PIR field of view
PIR field of view, PIR field of view,
Mains supply power source
Mains supply power source, mains supply power source,
Infrared detector
Infrared detector, infrared detector,
Heat detector
Heat detector, heat detector,
Foil on glass detector
Foil on glass detector, foil on glass detector,
Dial-up remote equipment
Dial-up remote equipment, dial-up remote equipment,
Beam fence disturbance
Beam fence disturbance, beam fence disturbance,
User control keyswitch
User control keyswitch, user control keyswitch,
User control digital keypad
User control digital keypad, user control digital keypad,
Ultrasonic transceiver
Ultrasonic transceiver, ultrasonic transceiver,
Transformer
Transformer, transformer,
Space detection device
Space detection device, space detection device,
Slave tape dialer
Slave tape dialer, slave tape dialer,
Slave digital communicator
Slave digital communicator, slave digital communicator,
Remote zone annunciator
Remote zone annunciator, remote zone annunciator,
Passive infrared
Passive infrared, passive infrared,
Microwave transceiver
Microwave transceiver, microwave transceiver,
Line cut monitor
Line cut monitor, line cut monitor,
Infrasonic
Infrasonic, infrasonic,
Foil
Foil, foil,
Emergency power / battery
Emergency power / battery, emergency power, emergency battery,
Dual technology device
Dual technology device, dual technology device,
Control unit
Control unit, control unit,
Contact switch surface
Contact switch surface, contact switch surface,
Contact switch flush
Contact switch flush, contact switch flush,
Used Solutions

How To Create CCTV Network Diagram

CCTV Network Diagram - Home CCTV system
Closed-circuit television (CCTV) uses cameras and monitors to carry out video surveillance. Unlike broadcast television this system has only local signal. It is a feature of almost every video camera, yet CCTV is mainly a system for visual control of certain areas such as banks, airports, supermarkets, and other places for security reasons. Developing and installing CCTV system is a time-consuming process. It also requires certain knowledge and skills. ConceptDraw is a solution of setting video cameras rationally. You can achieve two aims at once: CCTV Design Tool saves your time and your money and helps you make professional video surveillance system.