HD4/R Gas Technology
HD4/R Indoor Gas-Insulated Circuit Breaker
The HD4/R by ABB is a high-performance indoor gas-insulated circuit breaker designed for medium-voltage secondary distribution networks and MV/LV transformer substations. It operates at voltages up to 36 kV, with rated currents up to 1250 A and short-circuit breaking capacity up to 25 kA.
Key Features:
- SF6 gas insulation ensures high reliability and compact dimensions.
- Spring-operated mechanism for consistent and maintenance-friendly operations.
- PR521 electronic protection (optional) provides autonomous overcurrent protection without requiring external auxiliary power.
- Three-position disconnector: Line, Open, and Earth configurations enhance operational flexibility.
- Metal-clad compatible: Suitable for integration into compact metal-clad switchgear systems.
- Sealed-for-life design reduces environmental impact and maintenance needs.
Applications:
- Secondary distribution in utilities.
- Transformer substations (MV/LV).
- Renewable energy systems and compact industrial installations.
The HD4/R combines high safety standards, compact size, and reliable performance, making it an ideal solution for modern medium-voltage infrastructure.
