Abb breaker stun opener and stun closer

A blast from the past!

ABB (Asea Brown Boveri) was a Swedish-Swiss multinational corporation that was a leading manufacturer of electrical equipment and automation solutions. In the context of electrical power systems, ABB was known for its high-voltage circuit breakers, which are used to interrupt electrical currents in the event of a fault or overload.

The "breaker" in question is likely a reference to a circuit breaker, which is a device that can be used to interrupt an electrical circuit in the event of a fault or overload. Circuit breakers are designed to trip (or open) when the current flowing through them exceeds a certain threshold, and they are typically used to protect electrical equipment and people from electrical shock or injury.

The "stun opener" and "stun closer" terms are likely references to specific features or functions of ABB's circuit breakers. Here's a possible explanation:

• "Stun opener": In some circuit breakers, there is a feature called a "stun" or "stun trip" that allows the breaker to trip (or open) briefly in response to a fault or overload, but then automatically reset (or close) once the fault is cleared. The "stun opener" might refer to this feature, which allows the breaker to open briefly before resetting.
• "Stun closer": Conversely, the "stun closer" might refer to a feature that allows the breaker to close (or reset) briefly before tripping (or opening) in response to a fault or overload. This feature is sometimes used to provide a "soft" trip, where the breaker closes briefly before opening to minimize the impact of the fault on the electrical system.

It's worth noting that these terms may be specific to ABB's circuit breakers, and may not be universally used or understood in the electrical industry.