Thermal magnetic circuit breaker symbol
The thermal magnetic circuit breaker symbol is a combination of two symbols:
- Thermal symbol: This symbol represents the thermal element of the circuit breaker, which detects overheating of the circuit due to excessive current flow. The thermal symbol is usually represented by a circle with a dot in the center, and may have a curved or angled line connecting it to the rest of the circuit breaker symbol.
- Magnetic symbol: This symbol represents the magnetic element of the circuit breaker, which detects sudden changes in current flow, such as those caused by a short circuit. The magnetic symbol is usually represented by a rectangle with a diagonal line or a zigzag pattern.
When combined, the thermal magnetic circuit breaker symbol looks like this:
The thermal magnetic circuit breaker symbol indicates that the device is designed to detect both thermal and magnetic faults, and can trip the circuit in response to either type of fault.
Here's a breakdown of the symbol:
- The circle with a dot in the center represents the thermal element.
- The rectangle with a diagonal line or zigzag pattern represents the magnetic element.
- The curved or angled line connecting the thermal symbol to the magnetic symbol represents the combination of the two elements.
- The "T" or "M" inside the rectangle may indicate the type of fault detection (thermal or magnetic).
The thermal magnetic circuit breaker symbol is commonly used in electrical diagrams and schematics to represent a circuit breaker that is designed to detect and respond to both thermal and magnetic faults.