FLEXIFESTOON® DLO
DLO Cable Classification: DLO designation meaning: DLO = Deep Level Operations (primary interpretation) Alternative: Diesel Locomotive Overhead (secondary) Context: Used extensively in South African and Australian deep mines where locomotive-hauled trains move ore underground Power supply: 2000V AC fed overhead to locomotive pantograph Deep Level Operations (mining context): Depth: >2,000 meters (6,500+ feet) below surface Pressure: 200+ atmospheres (extreme hydrostatic) Temperature: Geothermal heating to +35–40°C at depth (before cooling) Moisture: 100% relative humidity (saturated conditions) Chemical exposure: Sulfides, nitrates, acidic water Cable requirement: Must withstand extreme environmental stress DLO 2000V: Engineered specifically for these conditions 2000V voltage class significance: Why 2000V (not 1000V or 10kV)? – 1000V: Insufficient for long underground raceways (voltage drop) – 2000V: Sweet spot for deep mine distribution (good efficiency) – 10kV: Overkill for mobile equipment, insulation too thick Power efficiency at depth: P_loss = I²R per kilometer of cable run At 2000V, current = P / (2000 × √3) = 70–80% lower than 240V Over 5 km underground run: Voltage drop acceptable Voltage stress on insulation: Peak voltage (AC peak): 2000 × √2 / 1.414 ≈ 2.8 kV peak Test voltage: 4 kV (1.4× peak, safety margin) Partial discharge inception voltage (PDIV): >5 kV (safe margin) Single-core requirement: Mining locomotives: Three single-core cables run overhead in catenary Reason: Parallel path allows independent cable routing Mechanical advantage: Individual cables can flex, bend independently Installation: Easier to handle than 3-core bundle underground Application: One cable per phase (L1, L2, L3) + neutral if needed Typical setup: 3 × 2000V DLO cables for 3-phase power to locomotive




![GAALFLEX® TRAY VFD 1420 5 GAALFLEX® TRAY VFD 1420 2000V: Multi-Certified Dual 1000V/2000V Variable Frequency Drive Cable for Flexible North American and International Industrial High-Voltage VFD Systems with Maximum Certification and Voltage Platform Flexibility (Dual 1000V [WTTC 90°C Dry] / 2000V [UL 1277 TC-ER 90°C Dry/Wet] Voltage Rating with Optional 600V UL TC-ER Upgrade, Comprehensive 3+3 Earth Conductor Configuration [3 Power + 3 Ground] Supporting High-Voltage Industrial Motor Power Distribution, AWG Conductor Range [14 AWG to 500 MCM] Enabling Complete High-Voltage Motor Specification from Control Circuits Through Maximum Industrial Motor Systems, Finely Stranded Red Copper per ASTM B-3 and B-174, Special XLPE [Cross-Linked Polyethylene] Insulation Providing Electrical Stability and Flame-Retardant Performance Under Multi-Voltage Stress, Uninsulated Finely Stranded Red Copper Earth Conductors per ASTM B-3 or B-174, Red Copper Tape Shielding Providing Comprehensive EMI Suppression and Grounding Continuity, Black RAL 9005 Standard PVC Halogen-Free Outer Sheath with UV Resistance Enabling Outdoor Industrial Installation, Temperature Range −25 to +90°C [Fixed and Flexible Installation] with 90°C Dry and 90°C Wet UL Rating Enabling Industrial High-Voltage Facilities, 12×D Minimum Bending Radius Supporting Robust Installation, Comprehensive Flame Testing per UL 1581, UL 2556 VW-1, CSA FT4, UL 1685 Vertical Flame, IEEE 383, IEEE 1202 Vertical Tray Flame, ICEA T-29-520 Ensuring Fire Safety Across North American and International Standards, Optional Oil Resistance Grade I per UL 1277 60°C, Optional Special EPR Compound Insulation Upgrade Available, Optional Tinned Copper Upgrade Available, EPA 40 CFR Part 261 Environmental Compliance, Optional OSHA and MSHA Approval Available for Hazardous-Area Mining Applications, RoHS Approved, c(UL) Type CIC/TC FT4 Certification Enabling North American Hazardous-Area and Instrumentation Compliance, Optional RHH or RHW-2 Conductor Upgrade per UL 44 and ICEA S-95-658 / NEMA WC 70 Enabling Premium North American Conductor Specification, CSA C22.2 No. 230 Tray Cable and CSA C22.2 No. 239 Control and Instrumentation Cable Optional Certification, Electromagnetic Compatibility per EN 55011 / DIN VDE 0875 / EN 61800-3, and Complete North American Flexible Multi-Certified High-Voltage VFD Infrastructure Compliance Enabling OEM High-Voltage Motor Drive Integration with Maximum Certification Flexibility and Voltage Platform Choice)](https://feichuncables.com/blog/wp-content/uploads/image-1397-917x702.avif)
![GAALFLEX® TRAY VFD 1500 T 6 GAALFLEX® TRAY VFD 1500 T: UL-Certified 1000V Cable Tray Variable Frequency Drive Inverter Connection Cable for North American Industrial Cable Tray Systems, Frequency Converter Integration, and Hazardous-Area Installations (1000 V Nominal Voltage [UL WTTC Rating], UL Type TC-ER c(UL) Type CIC FT4 Fire Classification Certification, Comprehensive Dual-Configuration Portfolio [4-Core and 3+3 Earth Conductor Versions], 16–500 MCM Conductor Range Enabling Complete North American Tray VFD Specification from Control Circuits Through Maximum Industrial Motor Systems, Finely Stranded Red Copper per ASTM B-3, B-33, B-172, B-174, Special PVC/Nylon Insulation Providing Electrical Stability and Flame-Retardant Performance, Aluminum Tape + PETP Foil + Tinned Copper Braid + Tinned Copper Drain Wire Triple-Layer Shielding Providing Effective EMI Suppression and Signal Integrity, High-Strength Ripcord Under Outer Sheath Enabling Field Installation, Black RAL 9005 TPE [Thermoplastic Elastomer] Halogen-Free Outer Sheath with UV Resistance Enabling Outdoor Industrial Installation, Temperature Range −25 to +90°C [Fixed and Flexible Installation] with 6×D Minimum Bending Radius Supporting Cable Tray Routing, UL Type TC-ER Approval Enabling Tray Installation per NEC [National Electrical Code], Oil Resistance Grade I per UL 1277, Electromagnetic Compatibility per EN 55011 / DIN VDE 0875 / EN 61800-3, Self-Extinguishing and Flame-Retardant per c(UL) FT4 Vertical Flame Propagation Testing, Optional UL 1277 60°C 600V Upgrade Available, MSHA [Mine Safety and Health Administration] Approval for Hazardous-Area Mining Applications, RoHS Approved, UL/CSA Standards Compliance [ASTM B-3, UL 66, UL 83, UL 1277, CSA C22.2 230/239], and Complete North American VFD Infrastructure Compliance Enabling OEM Tray Cable Integration and Process Automation Acceptance)](https://feichuncables.com/blog/wp-content/uploads/image-1389.avif)