Electrical
AC System Impedance Testing Acceptance of Innovative Ground Wire Monitor Intallation Schemes for Longwall Operations Acceptance of Innovative Ground Wire Monitor Intallation Schemes for Mining Operations Analysis of a DC-to-Frame Fault on an AC/DC Shuttle Car An Evaluation of Problems Associated with 1,000 VAC Longwall Mining Systems Arcing Faults on Direct Current Trolley Systems Autotransformers for Supplying Portable Mining Equipment Computerized Method for Evaluating the Suitability of Trailing Cables Criteria for Approval of Mining Equipment Incorporating On-Board Swithing of High-Voltage Circuits Determination of Electrical Clearances for Permissible Equipment Operating in Gassy Mines and Tunnels Electrical Grounding Papers Evaluation of a Bradford Stuart Industries Welding Voltage Reduction Device Evaluation of Welding Voltage Reduction Devices Evolution of Longwall Mining and Control Systems in the United States "Ghosting" of Electro-Hydraulic Longwall Shield Advance Systems Ground Wire Monitors High-Voltage Longwall Database History of Coal Mine Electrical Fatalities Since 1970 Installation and Maintenance of Intrinsically Safe Field Wiring in Gassy Mines (also see PC-4812-0) Installation and Maintenance of Intrinsically Safe Field Wiring in Gassy Mines (Program Circular PC-4812-0) Instantaneous Circuit Breaker Settings for the Short-Circuit Protection of Direct Current 300 and 600 Volt Trailing Cables Instantaneous Circuit Breaker Settings for the Short-Circuit Protection of Three Phase 480, 600 and 1040V Trailing Cables Interconnection of MSHA Evaluated Mine-Wide Monitoring Systems and MSHA Approved Longwall Mining Systems Investigative Report on Variable Frequency Drives MSHA Approval Process Short-Circuit Protection of Intercomponent Cables on 3 Phase, Alternating Current, Permissible Mining Equipment System Safety Applications in Mining The Application of Fiber Optics to Coal Mine Pager Telephone Systems