Overview
The S&C Electric 124060-R4 is an SM-4 refill unit high voltage fuse engineered for outdoor distribution substations and industrial power systems. This refill unit component supports the SM fuse family, which is designed to protect transformers, capacitor banks, and cables on systems rated through 34.5 kV. The SM-4 refill unit provides reliable overcurrent protection and fault interruption in utility and industrial applications requiring medium to high voltage circuit protection.
Key Features
- High-voltage design suitable for systems rated through 34.5 kV
- Refill unit component for SM-4 fuse family compatibility
- Provides upstream and downstream circuit protection
- Continuous current ratings available in 200, 300, 400, and 720 ampere options
- Superior fault-interrupting ratings from 28,000 to 60,000 amperes RMS asymmetrical depending on voltage class
- Field-proven design for transformer, feeder, and capacitor bank protection
Technical Specifications
- Equipment Type: Refill Unit
- Fuse Family: SM-4
- Manufacturer: S&C Electric Company
- Part Number: 124060-R4
- Application: Outdoor distribution protection
- Maximum System Voltage: 34.5 kV
- Current Ratings: 200A, 300A, 400A, 720A (consult datasheet for specific part rating)
Typical Applications
- Transformer protection in utility and industrial substations
- Capacitor bank protection and sectionalizing
- Cable and feeder line protection
- Outdoor distribution switching and protection systems
- Industrial power distribution networks rated 4.16 kV through 34.5 kV
Compatibility & Replacements
Compatible With
- SM-4 fuse holder assemblies and outdoor distribution equipment
- Medium voltage switchgear rated through 34.5 kV
- Standard distribution mounting hardware compatible with SM fuse family
- Utility and industrial power distribution systems
Replaces / Drop-In Replacement For
- Verify specific replacement model numbers with S&C Electric or authorized distributors, as 124060-R4 is a refill unit component and compatibility depends on host fuse assembly specifications
Works With
- SM fuse family (SM-4, SM-5 variants)
- S&C Electric distribution protection equipment
- Standard outdoor distribution hardware and substation installations
- Medium voltage power distribution control systems
