What is meaning of Failsafe Systems?
A failsafe system is a design method that assures the equipment automatically goes into a safe condition when a fault, failure (or) power loss occurs.
A failsafe system is one that protects people and equipment by defaulting to safety during failure.
Examples
• Circuit breaker trips when there is a fault → system becomes safe.
• Emergency stop button (E-Stop) → cuts power immediately.
• Fire alarm system → activates when a fault is detected.
• Elevator brakes → engage automatically during power failure.
• Substation protection relay → trips the circuit breaker during abnormal conditions.
In Electrical & Industrial Systems
Failsafe means:
• Contacts are designed Normally Closed (NC) for safety circuits.
• Loss of control power → trip occurs automatically.
• Control logic designed so that failure = shutdown & not continued operation.
A failsafe system is designed so that any failure (or) loss of power causes the system to move into a safe operating state.
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