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An ISO 9001, 14001 & 45001 Company

An ISO 9001, 14001 & 45001 Company

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Cable Testing Services

DIATECH is your trusted partner for cable testing and evaluation. Our cutting-edge online and offline testing and monitoring solutions adhere to international standards and consistently deliver accurate and reliable results. We perform a range of tests to identify incipient cable defects before they cause failures and plant outages, ensuring the uptime, safety and efficiency of your plant.

Our testing methods leverage the following key technologies:

  • VLF Tan Delta: Low frequency (0.1 Hz), high voltage signals are applied to the cable to measure its loss factor, detecting the presence of water trees and physical damage.
  • VLF Partial Discharge: Low frequency (0.1 Hz), high voltage signals are applied to the cable to measure its PD activity, identifying voids and electrical trees, and pinpointing their locations.
  • DAC Partial Discharge: Oscillating frequency (20 Hz to 500 Hz), high voltage signals are applied to the cable to measure its PD activity, enabling the detection of voids and electrical trees and determining their locations.
  • LIRA: High frequency (100 kHz to 100 MHz), low voltage signals are applied to the cable to map its impedance fluctuations, identifying the locations of water trees and physical damage.

CableCARE®

Cable Condition and Reliability Evaluation Program

CableCARE® is a comprehensive diagnostic procedure merging our knowledge from testing 8,000+ cables of up to 400 kV with all relevant IEC, IEEE and CIGRE standards.

Why choose CableCARE®

CableCARE® can assess LV, MV, HV and EHV cables and predict practically any incipient fault well in advance. It offers USPs like
Safe operational period for a cable is specified
Incipient defects are identified, along with an assessment of their severity
The exact location of the defect can be identified
Corrective actions are recommended
All tests and results are non-destructive and in accordance with relevant IEC, IEEE & ANSI standards

When combined with history and operational data, the residual life can be estimated

CableCARE® can detect all
possible failure modes in cables like

On-Line CableCARE®

Joint defects

Termination defects

Electrical treeing

Cracking

Estimation of incipient defect’s location

Off-Line CableCARE®

Joint defects

Water treeing

Electrical treeing

Moisture intrusion

Surface contamination

Embrittlement

Cracking

Mechanical damage

Aging

Chemical degradation

Thermal degradation

Sheath damage

Conductor defects

Precise identification of defect’s location

Key technologies used in CableCARE®

On-Line CableCARE®

HFCT Based PD Analysis

FMC Based PD Analysis

Off-Line CableCARE®

LEVEL I

VLF/DAC PD Analysis

VLF/DAC Tan Delta Analysis

Line Impedance Resonance Analysis (LIRA)

Sheath Test

LEVEL II

VLF Monitored Hi-pot Test

Dielectric Frequency Response Analysis

Cable Life Estimation

What is the process of deploying CableCARE®?

On-Line CableCARE® is performed during routine operations

Off-Line CableCARE® Level I is performed during a planned outage. LIRA® should be used for cables with joints only

DFRA test (part of CableCARE® Level II) is performed if tan delta values are high and PD is not detected

Monitored VLF Hi-Pot Test (part of CableCARE® Level II) is performed if tan delta values are high and/or PD is detected but its location is not identifiable

On-Line CableCARE® and Off-Line CableCARE® Level I are repeated based on the safe operational period specified