Application & Operating Conditions
2000 V Symmetrical 3+3+GC Mining VFD Power Cable is purpose-engineered for variable-frequency AC motor drives on underground longwall shearers, armored face conveyors, continuous haulage systems, mine hoist/slurry pump skids, and surface excavator/crusher VFDs. Splitting the equipment ground into three equal green-insulated conductors arranged at 120-degree intervals inside a 100% foil-plus-copper-braid shield balances phase-to-ground capacitance, suppresses reflected voltage spikes, and diverts destructive bearing currents away from mine motor shafts while maintaining continuous MSHA ground-check loop monitoring.
Balanced 3+3 Low-Impedance Ground Return
Three symmetrically phased green-insulated tinned copper grounds cancel electromagnetic field imbalance and provide a low-inductance return path for high-dV/dt IGBT switching currents.
100% Foil + Tinned Braid EMC Containment
Combination aluminum/polyester tape (high-frequency MHz containment) and heavy tinned copper braid (low-frequency kHz drain & mechanical flex durability) prevents PLC and gas-sensor interference.
Monitored Ground-Check (Center or Interstice)
Includes a yellow-insulated flexible tinned copper ground-check conductor (14 AWG minimum in interstice, or neutral-axis center GC configuration) compatible with standard mine ground-fault relays.
Why Standard Asymmetric Type SHD-GC Can Trip VFD Drives: Conventional two-ground trailing cables have unequal phase-to-ground capacitance across the three phases, driving zero-sequence common-mode currents into motor bearings. Use Symmetrical 3+3+GC VFD Cable between IGBT inverter cabinets and AC mine motors.
Cable Construction (2000 V Symmetrical 3+3+GC Braid + Foil Shielded)
Engineered to ICEA S-75-381 / NEMA WC 58 and CSA C22.2 No. 96 for rugged portable and mobile VFD mining installations.
| Layer / Component | Material & ICEA S-75-381 / CSA C22.2 No. 96 Engineering Specification |
|---|---|
| 1. Power Conductors (3×) | Three extra-flexible rope-lay stranded annealed tinned copper conductors (2 AWG to 500 kcmil) per ASTM B172 and ASTM B33. |
| 2. 90°C Type II EPDM Insulation | High-dielectric-strength, ozone- and corona-resistant Type II EPDM (EPR) rubber rated +90°C continuous to withstand repetitive PWM inverter voltage reflections. |
| 3. Symmetrical Grounds (3×) | Three flexible rope-lay stranded tinned copper grounding conductors (8 AWG to 1/0 AWG), insulated and colored Green, placed symmetrically at 120° intervals. |
| 4. Ground-Check Conductor (GC) | Flexible stranded tinned copper pilot conductor with yellow insulation (available as neutral-axis center ground-check or interstitial ≥14 AWG pilot). |
| 5. 100% Foil + Cu Braid Shield | Overall 100%-coverage aluminum/polyester metallic tape combined with a high-coverage flexible tinned copper wire braid shield. |
| 6. Mold-Cured Black CPE Jacket | Reinforced extra-heavy-duty mold-cured thermosetting Chlorinated Polyethylene (CPE) outer sheath (155 mil to 265 mil wall; ±5% OD tolerance). |
2000V 3+3+GC VFD cross-section: 3 Type II EPDM power cores, 3 symmetrical green-insulated grounds, yellow GC pilot, 100% Al/polyester foil + tinned copper braid, and mold-cured CPE jacket.
Technical Characteristics
Electrical, thermal, shielding, and reel-layer correction parameters for 2,000 V Mining VFD Power Cable.
| Parameter | ICEA S-75-381 / CSA C22.2 No. 96 Rated Value |
|---|---|
| Rated Voltage | 2,000 V AC continuous (engineered for PWM variable-frequency AC drives up to 2 kV class) |
| Conductor Architecture | Round symmetrical: 3 power + 3 green insulated grounds + 1 yellow ground-check |
| Overall EMC Shielding | 100% coverage aluminum/polyester tape + overall tinned copper wire braid |
| Temperature Rating | +90°C maximum continuous conductor temperature | +40°C base ampacity ambient |
| Manufacturing OD Tolerance | ±5% of nominal overall cable outside diameter |
| Standards Reference | ICEA S-75-381 / NEMA WC 58; ASTM B172 & ASTM B33; CAN/CSA-C22.2 No. 96 |
2000 V Symmetrical 3+3+GC Mining VFD Dimensions & Ampacity (2 AWG to 500 kcmil)
Complete dual-unit nominal dimensions, symmetrical three-ground gauges, jacket wall thicknesses, weights, and +90°C continuous ampacity ratings.
Table 1: 2000 V Symmetrical 3 Power + 3 Ground + Ground-Check VFD Cable — Foil + Braid Shielded CPE
| Power Cores | Area (mm²) | Symmetrical Grounds | GC Core | EMC Shield | Jacket Wall (in / mm) | Nominal OD (in / mm) | Weight (lb/kft / kg/km) | Ampacity 40°C (A) |
|---|---|---|---|---|---|---|---|---|
| 3 × 2 AWG | 33.62 | 3 × 8 AWG | Yellow GC | Braid + Foil | 0.155 / 3.9 | 1.43 / 36.3 | 1,790 / 2,664 | 159 |
| 3 × 1 AWG | 42.41 | 3 × 7 AWG | Yellow GC | Braid + Foil | 0.170 / 4.3 | 1.64 / 41.7 | 2,150 / 3,199 | 184 |
| 3 × 1/0 AWG | 53.49 | 3 × 6 AWG | Yellow GC | Braid + Foil | 0.170 / 4.3 | 1.74 / 44.2 | 2,550 / 3,795 | 211 |
| 3 × 2/0 AWG | 67.43 | 3 × 5 AWG | Yellow GC | Braid + Foil | 0.190 / 4.8 | 1.89 / 48.0 | 3,100 / 4,613 | 243 |
| 3 × 3/0 AWG | 85.01 | 3 × 4 AWG | Yellow GC | Braid + Foil | 0.190 / 4.8 | 2.01 / 51.1 | 4,050 / 6,027 | 279 |
| 3 × 4/0 AWG | 107.2 | 3 × 3 AWG | Yellow GC | Braid + Foil | 0.220 / 5.6 | 2.17 / 55.1 | 4,390 / 6,533 | 321 |
| 3 × 250 kcmil | 126.7 | 3 × 3 AWG | Yellow GC | Braid + Foil | 0.220 / 5.6 | 2.40 / 61.0 | 5,950 / 8,855 | 355 |
| 3 × 350 kcmil | 177.3 | 3 × 1 AWG | Yellow GC | Braid + Foil | 0.235 / 6.0 | 2.68 / 68.1 | 7,840 / 11,667 | 435 |
| 3 × 500 kcmil | 253.4 | 3 × 1/0 AWG | Yellow GC | Braid + Foil | 0.265 / 6.7 | 3.03 / 77.0 | 9,730 / 14,480 | 536 |
Specialty Mining VFD, Drill Mast, Signal & Lighting Selection
Compare 2000 V Symmetrical VFD Cable against Drilling Mast, Longwall Signal, Underground Lighting, and Type SHD-PCG cables.
| Mining Cable Model | Voltage Class, Ground / Shield Architecture & Primary Mining Duty |
|---|---|
| Mining VFD 2kV (3+3+GC) | Symmetrical 3 power + 3 green grounds + yellow GC (2 AWG–500 kcmil) with 100% Al/polyester foil + overall tinned copper braid EMC shield for AC variable-frequency mine drives. |
| Blast-Hole Drilling Mast (600–2000V) | High-flex round hybrid cable combining 2 EPR power cores (1/0–500 kcmil) + tinned ground + user-configurable multi-core control group for rotary drill masts, festoons, and loops. |
| Longwall Signal Cable (50V TPU) | Extra-flexible 50 V underground control & signal cable (2–9 cores, 18 to 10 AWG) with cross-linked FR polyolefin insulation, extra-tough TPU jacket, and optional copper braid. |
| Underground Lighting Cable (110V TPU) | Heavy-duty 110 V mine luminaire & drift lighting cable (2–9 cores, 18 to 10 AWG) with non-chlorinated cross-linked FR polyolefin insulation and cut-resistant TPU outer sheath. |
| Type SHD-PCG (2kV & 5kV) | Shielded 3-phase power + 2 integrated control/pilot cores + ground trailing cable for continuous miners and longwall face equipment. |
Frequently Asked Questions (FAQ)
Engineering FAQs on 3+3+GC VFD grounding termination, corona resistance, and ground-check placement.
How should the overall foil/braid shield and three green ground wires be terminated at VFD cabinets and motors?
Terminate the overall tinned copper braid 360 degrees at both the inverter enclosure and motor terminal box using EMC compression glands, and bond all three symmetrical green ground conductors equally onto the ground bus at both ends to preserve balanced low-impedance high-frequency return.
Why is Type II EPDM rubber preferred over PVC/nylon (THHN) in 2000V mining VFD cables?
Type II EPDM (EPR) exhibits a low dielectric constant (~2.8–3.2 vs. 6–8 for PVC) and superior corona/partial-discharge inception voltage, dramatically cutting capacitive charging spikes on long motor feeder runs while retaining full cold-weather flexibility.
Can this 2000V VFD cable be built with a neutral-axis Center Ground-Check (CGC)?
Yes. We supply both center-positioned yellow ground-check builds (ideal for dynamic cable-handler chains and reels) and interstitial ground-check builds (14 AWG minimum) to match your mine coupler pinout.
Request a 2000V Symmetrical 3+3+GC Mining VFD Cable Quote
Specify power conductor size (2 AWG to 500 kcmil), center or interstitial ground-check preference, and required drum cut lengths for factory pricing.
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