The FZ(R)N16-12D Indoor AC Medium Voltage Vacuum Load Break switch is a high-performance switching device engineered for safe and efficient operation in 12kV, 50/60Hz indoor power distribution systems. Designed for integration into ring main units (RMUs), compact substations, and industrial Switchgear, it enables reliable load current interruption and visible isolation under normal operating conditions—without requiring external arc-quenching media.

At the core of its design lies a hermetically sealed **vacuum interrupter**, which ensures maintenance-free performance, superior dielectric recovery, and consistent switching stability over tens of thousands of operations. The FZ(R)N16-12D’s robust construction meets IEC 62271 standards and supports optional built-in earthing switches for enhanced operator safety during maintenance procedures.

• 12kV vacuum ring main unit switch – ideal for underground urban networks demanding compact size and high reliability

• Indoor medium-voltage isolating breaker – delivers clear visual break indication and secure disconnection in enclosed panels

• Durable AC load interrupter – built for frequent switching with minimal contact wear and long service life

With a rated short-time withstand current of up to **31.5kA/4s** and a 1-minute power frequency withstand voltage of **42kV**, this load break switch ensures system resilience during transient overloads. Its modular frame allows seamless coordination with fuses, current Transformers, and monitoring accessories—supporting smart grid readiness and predictive maintenance strategies.

Whether deployed in commercial buildings, renewable energy interconnections, or critical infrastructure, the FZ(R)N16-12D combines advanced vacuum technology with practical safety features, offering utilities and engineers a dependable, future-proof solution for indoor medium-voltage control.