When a three-phase transformer in a power distribution substation experiences an internal fault, which mechanism isolates the transformer while minimizing disruption?

💡 Explanation

Differential current protection activates when current imbalance exceeds a set threshold, indicating an internal fault, because it triggers circuit breakers to isolate the transformer. Therefore, fault current is rapidly stopped with localized impact, rather than causing widespread power outages.

• Which outcome occurs when thermal decomposition initiates in turbocharger lubricant exposed to fuel dilution at high temperatures?
• Which consequence results when sustained chloride exposure undermines cohesion?
• Which outcome occurs when localized 'hot spots' raise piston temperature?
• Which outcome occurs when the grinding wheel's coolant supply fails during precision camshaft lobe grinding?
• Which error occurs when a telecommunication signal's group delay becomes non-linear after compensation?
• Which outcome occurs when ethylene glycol concentration falls too low in a chiller unit's closed-loop system subjected to sub-zero temperatures?