Products

Porcelain drop out fuse units deliver exceptional durability through advanced ceramic construction that withstands decades of continuous service in demanding distribution environments. This established technology combines mechanical robustness with reliable electrical performance, making porcelain fuse cutout systems the preferred solution for utilities requiring long-term operational stability without compromise.

Ceramic Material Engineering for Electrical Applications

Structural Integrity Advantages:
Porcelain drop out fuse housings provide unmatched mechanical strength, resisting impact damage from falling debris, extreme weather events, and wildlife contact. The ceramic composition maintains structural integrity under thermal shock conditions that can damage alternative materials, ensuring consistent protection throughout extended service periods.

Electrical Performance Characteristics:

• Tracking Resistance: Superior surface properties prevent electrical tracking under contaminated conditions

• Arc Interruption: Optimized ceramic tube geometry enhances fault current interruption capabilities

• Insulation Stability: Consistent dielectric properties unaffected by aging or environmental exposure

• Flashover Prevention: High dry and wet flashover voltages maintain system reliability

  
  

Distribution System Applications & Benefits

Rural Network Protection:
Remote installations benefit from porcelain drop out fuse reliability where maintenance access remains limited. The ceramic construction requires no special environmental protection, operating effectively in agricultural areas with high dust exposure and chemical spray drift.

Transformer Protection Applications:
Distribution transformers utilize porcelain fuse cutout technology for primary-side protection, providing coordinated fault clearing with downstream protective devices. The visual dropout indication enables rapid identification of transformer faults during system restoration procedures.

Lateral Circuit Protection:
Overhead distribution laterals employ porcelain drop out fuse units for sectionalizing protection, isolating faulted sections while maintaining service to unaffected areas. The mechanical reliability ensures consistent operation during switching operations and fault conditions.

Technical Specifications & Standards Compliance

Voltage Class Options:
Available in 15kV, 27kV, and 38kV configurations with current ratings spanning 65A to 200A. Each voltage class meets applicable IEEE C37.41 and IEC 60282 performance requirements for distribution fuse cutout applications.

Interrupting Performance:
Porcelain drop out fuse units provide fault current interruption up to 25kA symmetrical RMS, coordinating with upstream reclosers and downstream protective devices according to established utility protection philosophies.

Environmental Ratings:
Operating temperature range from -40°C to +85°C with proven performance in moderate contamination environments. UV resistance prevents degradation during extended outdoor exposure periods.

For distribution applications demanding proven reliability and cost-effective protection, porcelain drop out fuse technology offers field-tested performance backed by decades of successful utility experience worldwide.