Introduction
Recently, Shanghai DEMIKS Power (Official Website: www.demikspower.com) has successfully delivered its self-developed DBP-DL-44kVA/44kV variable frequency series resonance withstand voltage test system to the laboratory of State Grid Binzhou Power Supply Company. As professional high voltage test equipment, this resonance system will be widely applied in AC withstand voltage preventive tests for 10kV~35kV distribution transformers, high voltage cables and switch-gears across Binzhou power grid. With lightweight resonance circuit and fully automatic intelligent control technology, the equipment greatly improves the efficiency and safety standard of power grid insulation inspection, consolidating DEMIKS Power’s leading position as a reliable supplier of high voltage test equipment for State Grid branches nationwide.
1. On-site Test & Core Configuration of Series Resonance Test System
The complete DBP-DL series resonance withstand voltage system consists of four core modules: intelligent variable frequency control console, excitation transformer, sectional high voltage reactor and precision capacitive voltage divider, all independently designed and manufactured by DEMIKS Power. The on-site commissioning photo shows stable performance during transformer withstand voltage simulation test, with accurate waveform collection.
- Intelligent Main Control Console: Equipped with 10-inch touch screen, integrated fully automatic testing program. It supports automatic frequency sweep, voltage boost, pressure holding, pressure reduction and fault protection. Real-time data including test voltage, current, resonance frequency and test duration are displayed clearly, test reports can be automatically saved and exported, fully complying with State Grid standardized test filing requirements. Multiple safety protection functions including emergency stop, over-voltage, over-current and flash-over protection are built-in to eliminate hazards during high voltage testing.
- Modular High Voltage Reactor: Model DDK-22kVA/22kV sectional reactor adopts split lightweight design, easy to transport for field substation testing. It fits withstand voltage tests for transformers, power cables, GIS and current/voltage transformers.
- Wide Frequency Conversion Technology: Operating frequency ranges from 30Hz to 300Hz, adaptable to various capacitance of test samples. It greatly reduces required power capacity, with 60% smaller volume and weight than traditional power frequency hipot testers, making it ideal portable high voltage test equipment for power grid field maintenance. During on-site commissioning, professional engineers from DEMIKS Power provided full training for State Grid Binzhou operation staff, including wiring operation, program setting and troubleshooting. Custom test parameter templates were developed according to local distribution transformer and cable operation conditions to simplify field inspection work.
2. Complementary Advantages & Long-term Strategic Cooperation
Core Strengths of Shanghai DEMIKS Power
As a specialized manufacturer of high voltage test equipment, DEMIKS Power displays full range products including series resonance withstand voltage testers, lightning impulse generators, partial discharge detectors and power frequency hipot equipment on official website www.demikspower.com. The company holds independent intellectual property rights in high voltage circuit simulation, resonance algorithm and intelligent control system. All products comply with GB/T 1094, DL/T 849 and international IEC standards. We provide one-stop services including customized solutions, production, on-site commissioning and lifetime maintenance for State Grid, China Southern Power Grid, transformer manufacturers and third-party testing labs.
Application Value for State Grid Binzhou Power Supply
State Grid Binzhou undertakes insulation preventive testing for urban and rural distribution networks across Binzhou city. With continuous expansion of local power grid, massive new distribution transformers and high voltage cables are put into operation. Outdated heavy withstand voltage testers can no longer meet efficient testing demands. The newly purchased DEMIKS DBP-DL variable frequency series resonance system fills the gap of portable intelligent high voltage test equipment:
- Complete routine withstand voltage inspection for 35kV and below distribution transformers;
- Field AC withstand voltage test for underground and overhead power cables;
- Automatic operation minimizes manual errors, test data can be uploaded to grid operation management platform to realize digital inspection management.
Long-term Cooperation Framework
This equipment delivery launches long-term strategic partnership between two parties:
- DEMIKS Power provides regular equipment calibration, hardware & software upgrade service for Binzhou Power. Operation manuals and troubleshooting guides of series resonance testers are updated on demikspower.comfor online reference;
- Based on real field test feedback from Binzhou power grid, DEMIKS Power optimizes the series resonance withstand voltage system for low-temperature outdoor operation in northern China;
- Joint promotion of complete high voltage test equipment packages to power supply companies surrounding northern Shandong region, expanding service coverage in northern China power market.
3. Industry Trend: Series Resonance Test Equipment Becomes Mandatory Device for Grid Insulation Inspection
With the acceleration of new power system construction, stricter standards are implemented for insulation safety management of electrical equipment. As core high voltage test equipment to evaluate insulation performance of transformers and cables, variable frequency series resonance testers gradually replace traditional heavy power frequency withstand voltage equipment for their energy-saving, portable, safe and high-precision features. Shanghai DEMIKS Power keeps focusing on R&D of high voltage test instruments. The official website www.demikspower.com serves as a comprehensive online portal for product display, technical consultation and customized solution design, supplying standardized high voltage testing equipment to domestic power grids and global electrical engineering companies, accelerating intelligent upgrading of domestic high voltage test instruments.
Official Website Reference
For detailed technical specifications of DBP-DL series variable frequency series resonance withstand voltage system and complete high voltage test equipment solutions for substations, visit Shanghai DEMIKS Power official website: https://www.demikspower.com
