Fuses and Electrical Protection Symbols
Fuses are devices containing a small piece of special wire that melts when the intensity of the current flowing through it for a certain period of time exceeds a set value, thus protecting the rest of the electrical circuit overloads.
Symbol | Description | Symbol | Description | |
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Fuse, IEEE / ANSI system Generic symbol + Info |
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Circuit Breaker + Info |
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Fuse | ![]() |
Threaded circuit breaker | |
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Fuse | ![]() |
Unipolar circuit breaker | |
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Fuse - IEC system | ![]() |
Bipolar circuit breaker | |
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Fuse, IEEE / ANSI system | ![]() |
Three-pole circuit breaker | |
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Fuse | ![]() |
Circuit Breaker cartridge | |
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Low speed fuse + Info |
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Circuit breaker isolator | |
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High speed fuse | ![]() |
Circuit breaker isolator horns | |
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Protection resistor | ![]() |
Fuse oil for high voltages | |
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Protection resistor | ![]() |
Oil fuse for high voltages | |
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Thermal fuse Thermal cutoff + Info |
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Fuse switch Switch with built-in fuse |
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Disconnector Isolator switch + Info |
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Disconnector Fuse switch (load-break) |
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Fuse with striker | ![]() |
Fuse with alarm contact | |
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Fuse with alarm contact | ![]() |
Fuse with separate alarm contact | |
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Set of 3 fuses linked together, with automatic release by the striker of one of them | ![]() |
The wide side is the side of the network that is active upon melting | |
Other Symbols of Electrical Protection Devices |
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Circuit breaker + Info |
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Circuit breaker + Info(Types) |
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Circuit breaker Molde case, non drawout |
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Circuit breaker - ANSI System Non drawout |
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Circuit breaker Molde case, drawout |
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Drawout cirucit breaker | |
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Thermal switch Overload thermal + Info |
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Electric spark gap / Protective gap + Info |
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Surge Arrester Gas discharge tube + Info |
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Electric spark gap | |
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Double Electric spark gap | ![]() |
Electric spark gap | |
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Lightning arrester Surge protection / surge diverter + Info |
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Lightning arrester Surge Protection / surge diverter |
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Telephone line protector | ![]() |
Lightning rod + Info |
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Delay | ![]() |
Network protector + Info |
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Thermostat + Info |
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Thermal switch + symbols |
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Picture gallery of fuses and electrical protectionDownload symbols |