GB/T 26860-2011 Precision Detection Ultra-low Frequency VLF Dielectric Loss Tester with Multiple High Voltage Safety Protection

T 26860-2011 Precision Detection Ultra-low Frequency VLF Dielectric Loss Tester with Multiple High Voltage Safety Protection

Product Introduction

VLF-TD is an integrated device for VLF withstand voltage and dielectric loss testing, covering the multi-dimensional insulation testing needs of medium voltage cables, supporting a variety of output waveforms, and its portable design is suitable for on-site mobile detection scenarios.

Advantages of Precise Insulation Detection

1. Compliant with CENELEC HD 620 S1/HD 621 S1 standards, the 0.1Hz VLF sine wave test can accurately identify water tree degradation in PE/XLPE cables, and realize reliable flashover detection for paper-insulated cable faults as well.

2. The dielectric loss factor (tanδ) measurement features a resolution of 1×10⁻⁵ and an accuracy of 1×10⁻⁴, which can accurately quantify the degree of cable insulation degradation and provide precise data support for status evaluation.

3. Supports automatic graded testing at 0.5/1.0/1.5 times the rated voltage U0, with multi-voltage gradients to fully scan the weak points of cable insulation for no dead angle detection.

4. Synchronously supports leakage current measurement, and comprehensively evaluates the relative quality of cable insulation by combining multi-dimensional data such as dielectric loss, capacitance and resistance, for more comprehensive judgment results.

Intelligent Automated Testing Experience

The dielectric loss test is fully automatic without manual intervention, a single test only takes 3 minutes and 30 seconds, greatly improving on-site detection efficiency; the withstand voltage test automatically starts timing after the voltage reaches the set value, and the test logic conforms to industry testing specifications. The device will output high voltage only after passing the self-test, avoiding invalid tests and safety risks in the process.

Professional Data Management Capability

The built-in storage of the device can automatically save all test records and support one-click data export via USB2.0 U disk; the supporting professional analysis software can open A/B/C three-phase test files at the same time, generate dielectric loss curves and waveform maps, support one-click generation of standardized test reports, and the reports can be exported and printed to meet the needs of test filing and report delivery.

Test of Cable's Dielectric Strength and Dielectric Loss

casing test

Compliance and Compatibility

The device complies with national standards such as GB/T 26852 and GB/T 26860-2011, meets CE certification requirements, and follows the Low Voltage Directive 2014/35/EC and EMC Directive 2014/30/EC; the operation interface supports multiple languages including Chinese, English, Russian and Spanish, adapting to the usage needs of different countries and regions.