Description
VD4/R and HD4/R Air Circuit Breakers – Designed for Compact Substations
The VD4/R and HD4/R are special variants of the VD4 and HD4 series, optimized for use in compact substations. These models are designed with enhanced features to fit the specific needs of compact substation environments, where space and performance are critical.
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.
VD4/R Indoor Vacuum Circuit Breaker
The VD4 by ABB is a robust indoor vacuum circuit breaker designed for medium-voltage secondary distribution networks and MV/LV transformer substations. It operates at voltages up to 24 kV, with rated currents up to 1250 A and a short-circuit breaking capacity up to 25 kA.
Key Features:
- Vacuum Interruption Technology: Ensures reliable and durable interruption of current, providing high-performance and long-lasting service.
- Spring-Operated Mechanism: Guarantees fast, consistent, and maintenance-friendly operations with a reliable spring-loaded actuation.
- Modular Design: Allows for easy installation and maintenance, offering flexibility and efficiency in operation.
- Integrated Protection and Monitoring: Includes built-in current sensors and optional protection relays for enhanced safety and monitoring.
- Compact and Reliable: Its compact design is well-suited for use in transformer substations and metal-clad switchgear systems.
- No Auxiliary Power Required: Operates without the need for external power, improving reliability and simplifying installation.
Applications:
- Secondary Distribution: Ideal for utilities requiring high-performance circuit protection.
- MV/LV Transformer Substations: Suited for efficient protection in substation systems.
- Compact Industrial Installations: Fits in confined spaces while maintaining high operational performance.
The VD4 circuit breaker combines high reliability, fast operational cycles, and minimal maintenance requirements, making it an excellent choice for modern medium-voltage infrastructure.