Electrical chart symbols are generally divided into: qualifiers, general symbols, box symbols, and markers or characters.
Qualified symbols cannot be used alone and must be combined with other symbols to form a complete graphical symbol.
Such as the chart symbol of the AC motor, consisting of text symbols, qualifiers for communication, and contour elements.
The time-delay overcurrent relay graphic symbol consists of the symbol element of the measurement relay box, the limit symbol of the action and delay action when the characteristic quantity value is greater than the set value, and the current symbol. [1]
Electrical square symbols are generally used in diagrams that use single-line representations, as in system diagrams and block diagrams, with a symbol in the box symbol to indicate the function of the object and the composition of the system, such as the rectifier chart symbol, by the box symbol It consists of a defined symbol of AC and DC and a variability-qualified symbol.
2. Classification of electrical graphic symbols:
Electrically defined symbols and other commonly used symbols include: type of current and voltage, variability, direction of force or motion, direction of flow, action correlation of characteristic quantities, effects or correlation, spokes, signal waveforms, mechanical control, operation Method, non-electrical control, grounding and picking up the case.
Graphical symbols for electrical conductors and connecting devices include: wires, connections to terminals and wires, connecting devices, cable accessories, etc.
Graphic symbols for electrical passive components include: resistors, inductors, capacitors, etc.
Semiconductor and electronic tube graphic symbols include: diodes, thyristors, optoelectronics, photosensors, and the like.
The generation and conversion of electrical energy graphical symbols include: the symbol of the winding connection, the internal connection of the winding, the motor components and types of transformers, reactors, arc suppression coils, braking resistors, series capacitors, converters, primary batteries.
Graphical symbols for switches, control and protection devices include: contact switches, switchgear and starters, with or without relays, measuring relays, fuses, gap arresters, etc.
Measuring instrument lights and signal device graphic symbols include: indicating integrated and recording instruments, telemetry devices, electric clocks, lights, speakers and bells.
Telecommunications graphical symbols include: switching equipment, telephones, transmission signal generators, inverters, amplifiers, optical fibers, optical cables, optical components, and the like.
Graphical symbols for power lighting and telecommunications arrangements include: power plants and substations, telecommunications bureaus and computer room facilities, wiring, wiring, electricity, distribution boxes, consoles, control equipment, electrical equipment, sockets, switches and lighting Lights are led out, etc.
Binary logic unit graphic symbols include: finite symbols associated with input and output and other connections, internal connection combination units and timing units.
The symbols of the analog unit diagram include: defined symbols for analog and digital signal identification, amplifiers, function units, signal converters, electronic switches, and the like.
KNB1-63 Miniature Circuit Breaker
KNB1-63 Mini Circuit breakers, also named as the air switch which have a short for arc extinguishing device. It is a switch role, and also is a automatic protection of low-voltage electrical distribution. Its role is equivalent to the combination of switch. Fuse. Thermal Relay and other electrical components. It mainly used for short circuit and overload protection. Generally, According to the poles, mini Circuit breaker can be divided into 1P , 1P+N , 2P, 3P and 4P.
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