Z. Fuses

1. Properties and Types

Identify properties, types, and applications ^{2, 3, 4}

• UL 248-12 Low Voltage Fuses Class R ²
• Specifying the Right Fuse for Circuit Protection ³
• Selecting Protective Devices EATON Handbook
• Medium Voltage Fuses
• How a Fuse Operates
• Fuse Application Guide
• Rating Definitions Applied to Medium Voltage Fuses
• Fuses: Principles of design and operation

2. Inspection and Test Procedures

Apply visual and mechanical inspections ^{2, 3, 4}

• NFPA 70 2017: National Electrical Code ^2 3 4
  - Article 230: Services
  - Article 240: Overcurrent Protection
• IEEE C37.46 Standard Specifications for High-Voltage (>1000 V) Expulsion and Current-Limiting Power Class Fuses and Fuse Disconnecting Switches ⁴
• Selection Guide For Transformer Primary Fuses in Medium- and High-Voltage Utility and Industrial Substations ⁴
• IEEE C37.40 Standard Service Conditions and Definitions for High-Voltage Fuses, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Accessories ⁴
• 10 Important Definitions Applied To Low Voltage Fuses
• Maintenance Procedures for Fuses 1
• Maintenance Procedures for Fuses 2
• Code Changes Based on 2020 NEC

Employ methods and procedures for electrical tests ^{2, 3, 4}

• NFPA 70B: Chapter 11.18 Fuses ^2 3 4
• ETT II: Resistance Testing Review

3. Interpretation of Test Results

Evaluate results of electrical tests ^{2, 3, 4}

• NETA-ATS 2017: Section 7 ^2 3 4
• NETA-MTS 2019: Section 7 ^2 3 4

Last Update: Aug 21, 2023