Description

ABB HD4/W 12.06.32 SF₆ Withdrawable Medium‑Voltage Circuit Breaker

Technical Specifications

• Product Model: HD4/W 12.06.32
• Brand: ABB
• Warranty: One Year
• Rated Voltage: 12 kV, 50‑60 Hz
• Operating Temperature: ‑5 °C ~ +40 °C indoor installation
• Storage Temperature: ‑25 °C ~ +70 °C
• Response Time: Total breaking time 55‑60 ms; arcing time 10‑15 msABB У…
• Protection Class: IP20 inside switchgear cubicle; designed for UniSafe metal‑clad switchgear
• Rated Normal Current: 630 A
• Short‑Circuit Breaking Capacity: 31.5 kA
• Short‑Time Withstand Current: 31.5 kA / 3 s
• Peak Making Current: 80 kA
• Interrupting Medium: SF₆ gas for insulation and arc quenching
• Operating Mechanism: Spring‑charged mechanism; manual or motor‑driven spring charging
• Control Supply: 110‑220 V AC/DC for closing / opening coils and charging motor
• Auxiliary Contacts: Multiple configurable auxiliary switch contacts for status feedback
• Mechanical Interlocks: Mechanical interlock for rack‑in / rack‑out, earthing and door‑locking
• Certifications: IEC 62271‑100, CE compliant
• Mounting: Withdrawable truck‑type, fits ABB UniSafe switchgear cubicle
• Dimensions / Weight: 720 mm × 420 mm × 880 mm; approx 220 kg
• 

Product Overview

The HD4/W 12.06.32 is a withdrawable SF₆ gas‑insulated medium‑voltage circuit‑breaker of ABB HD4 series, purpose‑built for UniSafe metal‑clad switchgear systemsManualsLib. The model code defines: 12 = 12 kV rated voltage; 06 = 630 A rated continuous current; 32 = 31.5 kA short‑circuit breaking capacity; W denotes withdrawable truck‑mounted version. It uses SF₆ as both insulating and arc‑extinguishing medium, delivering reliable switching and fault‑clearing performance for transformers, motor feeders and distribution feeders. Spring‑stored‑energy mechanism supports both local manual and remote electrical closing‑opening operation. Full mechanical interlock scheme prevents mis‑operation during racking‑in / racking‑out and maintenance procedures. Withdrawable truck‑type design allows breaker removal for inspection or spare‑part replacement without de‑energizing adjacent switchgear bays. Suitable for power‑plant auxiliary power rooms, industrial substations and utility distribution switch‑rooms under heavy‑EMI industrial environments.

This MV circuit‑breaker addresses medium‑voltage distribution protection challenges: SF₆ gas‑insulated arc quenching, withdrawable truck‑type design for easy maintenance, comprehensive mechanical safety interlocks, drop‑in spare‑part compatibility for legacy UniSafe‑series retrofit‑maintenance projects. Electrical power‑system engineers, substation and industrial‑plant maintenance technicians and retrofit integrators benefit most. Typical applications: industrial‑plant 12 kV distribution switchgear, transformer and motor‑feeder protection, utility secondary‑substation power‑distribution cabinets.