The mechanical indicator used at the CB to indicate the status of the breaker is called the __________.

The mechanical indicator used at the CB to indicate the status of the breaker is called the __________.

• A. Semaphore
• B. Indicator
• C. Gauge
• D. Meter

Answer: (A)

A visual, mechanical status indicator for a circuit breaker is called a semaphore. This device uses a small arm or flag that moves with the breaker mechanism to show whether the breaker is open (isolated) or closed (conducting). It provides an immediate, unambiguous cue at a glance, which is crucial for safe operations and quick verification in the field. Unlike gauges or meters, which measure electrical values, or a generic indicator that could be any signal, a semaphore is specifically designed to convey the breaker’s position in a clear, mechanical way.

A visual, mechanical status indicator for a circuit breaker is called a semaphore. This device uses a small arm or flag that moves with the breaker mechanism to show whether the breaker is open (isolated) or closed (conducting). It provides an immediate, unambiguous cue at a glance, which is crucial for safe operations and quick verification in the field. Unlike gauges or meters, which measure electrical values, or a generic indicator that could be any signal, a semaphore is specifically designed to convey the breaker’s position in a clear, mechanical way.