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dielectric strength verification

20 Min Read
NTSCGEWÖU mining cables manufactured according to DIN VDE 0250-813 specifications and operating at medium voltages ranging from six kilovolts to twelve kilovolts phase-to-phase, partial discharge testing serves multiple critical functions throughout the cable lifecycle. During factory acceptance testing, partial discharge measurements verify that cable manufacturing processes have produced insulation systems free from voids, contamination, or workmanship defects that could lead to premature failure. During field commissioning after cable installation, partial discharge testing validates that termination and splicing work has been executed properly without introducing stress concentrations or gaps that would initiate discharge activity. Throughout service life, periodic partial discharge measurements enable condition-based maintenance programs that identify cables experiencing insulation deterioration before catastrophic failures occur, allowing planned replacements during scheduled outages rather than emergency repairs following unexpected breakdowns.
Technical Department
on26/01/2026

What are the acceptance criteria for Partial Discharge (PD) measurements on (N)TSCGEWÖU medium voltage cables (typically < 20 pC)?

NTSCGEWÖU mining cables manufactured according to DIN VDE 0250-813 specifications and operating at medium voltages ranging from six kilovolts to twelve kilovolts phase-to-phase, partial discharge testing serves multiple critical functions throughout the cable lifecycle. During factory acceptance testing, partial discharge measurements verify that cable manufacturing processes have produced insulation systems free from voids, contamination, or workmanship defects that could lead to premature failure. During field commissioning after cable installation, partial discharge testing validates that termination and splicing work has been executed properly without introducing stress concentrations or gaps that would initiate discharge activity. Throughout service life, periodic partial discharge measurements enable condition-based maintenance programs that identify cables experiencing insulation deterioration before catastrophic failures occur, allowing planned replacements during scheduled outages rather than emergency repairs following unexpected breakdowns.
30 Min Read
SUPROMONT (N)3GHSSYCY 6 kV – 30 kV Medium Voltage Mining Cable: Technical Guide for Transformer and Shiftable Equipment Applications
Technical Department
on24/11/2025

SUPROMONT (N)3GHSSYCY 6 kV – 30 kV

The evolution of underground mining operations toward increasingly mechanized production methods and deeper extraction depths has driven corresponding evolution in electrical infrastructure requirements, progressively expanding from early kilowatt-scale low voltage systems toward modern megawatt-scale installations requiring medium voltage power distribution. The fundamental electrical engineering principle underlying this evolution recognizes that power transmission capacity equals voltage multiplied by current, enabling equivalent power delivery at substantially reduced current levels through voltage increase from conventional low voltage levels of six hundred sixty to one thousand one hundred forty volts to medium voltage levels ranging from three point six kilovolts to thirty kilovolts. This current reduction delivers multiple operational advantages including proportional reduction in conductor cross-sectional area requirements decreasing cable weight and installation cost, reduced resistive losses improving energy efficiency and decreasing cooling requirements, and enhanced power quality through reduced voltage drop across transmission distances extending hundreds of meters or kilometers in modern mining operations.