Products & Services
High-voltage testing equipment and integrated solutions for transformers, reactors, switchgear, cables, and power systems.
Turnkey Solutions
Beyond individual products, we deliver end-to-end testing solutions tailored to your site, standards, and workflow.
Material Sampling Inspection Center
Integrated sampling-inspection systems for distribution-network equipment up to 35 kV — surge arresters, instrument transformers, switchgear, reactors and arc suppression coils — with automatic measurement, switching and reporting.
Transformer Testing Laboratory
Complete lab design including power supply, test bench, instruments, shielding, grounding, and safety interlocks for transformer factories and third-party labs.
High Voltage Test Center up to 500 kV
Turnkey planning and construction of HV test halls up to 500 kV, including shielded rooms, central control rooms, rain test rooms, impulse generators, and PD-free test transformers.
Transformer Production & Logistics Line
Intelligent transformer production lines and logistics test systems, covering HV and LV test stations, automated transfer, and data management for transformer manufacturers.
Product Catalog
Browse our main product lines. Contact us for detailed specifications, datasheets, and quotations.
Transformer Testing
GDBZ-IV Automatic Transformer Comprehensive Test System
Integrated transformer testing platform covering no-load loss, load loss, winding resistance, ratio and vector group, and AC withstand voltage tests in a single automatic sequence. Reduces manual re-wiring between test items and consolidates results into one test report.
GD700A Transformer Turns Ratio Tester
Portable transformer turns ratio (TTR) tester for ratio, vector group and excitation current measurement. Designed for field commissioning and preventive maintenance where a full test bench is not available.
GD200-40WA Dual-Channel DC Winding Resistance Tester
Dual-channel 40 A DC resistance tester for transformer windings and tap changers. Two channels allow simultaneous measurement, shortening the stabilisation wait that dominates DC resistance testing time.
Reactor & Arc Suppression Coil Testing
GDDZ-III Reactor Integrated Test System
Automatic test system for reactor inductance, impedance, withstand voltage and loss measurement. Consolidates the individual test items required in reactor routine and type testing into one controlled sequence.
Automatic Reactor & Arc-Suppression-Coil Test System
Integrated sampling-test system for reactors and arc suppression coils (Petersen coils) up to 35 kV, combining intelligent measurement, power distribution, automatic line switching and wiring guidance modules into one station.
Material Sampling Test Systems
Automatic Surge Arrester Comprehensive Test System
Integrated sampling-test system for surge arresters up to 35 kV. Combines a human-machine terminal with an all-in-one test unit covering intelligent measurement, power distribution, automatic line switching and wiring guidance.
Automatic Instrument Transformer (CT/PT) Test System
Integrated sampling-test system for current and voltage transformers up to 35 kV, with automatic ranging, ratio and polarity verification, excitation characteristics and burden tests.
Automatic Switchgear Comprehensive Test System
Integrated sampling-test system for HV switchgear, ring main units, pole-mounted switches, disconnectors, cable branch boxes and LV switchgear, with automatic switching between test items.
High Voltage Test Equipment
YDTW Partial-Discharge-Free AC Test Transformer
Low partial-discharge AC test transformer used to verify the power-frequency insulation level of insulating materials, insulation structures and electrical products, and to serve as a PD-free test source for transformers, capacitors, HV switches, instrument transformers and surge arresters. Its own partial discharge level is kept low enough not to mask the discharge signal of the test object.
GDGP-I AC Withstand Voltage Test Set
Power-frequency withstand voltage (hipot) test set for transformers, switchgear, cables and insulators. Applies a specified AC voltage for a defined duration to verify insulation strength.
Lightning Impulse Test System
Impulse voltage generator producing standard lightning and switching impulse waveforms for insulation coordination and type tests on transformers and other high-voltage equipment.
Series Resonant Test System
Variable frequency series resonant test set with compact size, real-time status display, adjustable test voltage, frequency range and dwell time, automatic capacitance calculation and 0.1 Hz frequency resolution. Resonant tuning lets a modest supply drive the large capacitive load of long cables and generators.
Mobile Test Vehicles
Intelligent Power Test Vehicle
Custom-built vehicle carrying transformer test systems, measuring instruments and data acquisition, so a full test capability can be driven to a substation or factory instead of shipping the equipment to a laboratory.
Switchgear Mobile Test Vehicle
Dedicated vehicle for circuit breaker, protection relay and switchgear field testing, equipped so distribution-network equipment can be tested where it is installed.
Box-Type Substation Mobile Test Vehicle
Dedicated vehicle for on-site acceptance and preventive testing of prefabricated and box-type substations, so complete units can be verified at the installation site.
Power Testing Instruments
GD240-100A Loop Resistance Tester
High-current contact resistance tester for switchgear and busbar joints. Injects a regulated DC current and measures the millivolt drop to reveal contact degradation that visual inspection cannot detect.
HV Insulation Resistance Tester (Digital Megohmmeter)
High-voltage digital megohmmeter for insulation condition assessment of cables, motors and generators. Measures insulation resistance at a selected DC test voltage and can track absorption behaviour over time.
GD300C Power Analyzer
Transformer electrical parameter measuring instrument designed per JB/T 501 and GB 1094. Simultaneously measures single- or three-phase transformer RMS voltage, average voltage, RMS current, active power, power factor and frequency — the parameters required for no-load and load loss measurement.
GD6000A Variable Frequency Dielectric Loss (Tan Delta) Tester
Measures dielectric loss factor (tan delta) and capacitance to detect overall moisture, ageing and local defects in insulation. Applicable to transformers, instrument transformers, reactors, capacitors, bushings and surge arresters. Variable frequency excitation avoids mains-frequency interference on site.
BY2571 Digital Ground Resistance Tester
Digital earth resistance meter using DC/AC conversion instead of hand-cranked generation. Combines 3-terminal and 4-terminal measurement in one instrument with a low-frequency constant current source, avoiding the effort and instability of a hand-cranked generator.
Multi-Channel Data Recorder
Touch-screen data recorder with rich display, flexible operation and powerful recording, calculation, control and management functions for long-term multi-point test data acquisition, such as transformer temperature rise tests.
Test Center Facilities
EMC Shielded Room
Modular assembled shielding enclosure installed on a recessed floor slab with a level threshold for easy trolley access. Attenuates external electromagnetic interference so partial discharge measurements in the pico-coulomb range are not swamped by ambient noise. Requires a foundation pit, pre-embedded conduits and grounding electrodes before installation.
Central Control Room
Operator control room for a high-voltage test center, integrating the console, control systems, monitoring displays and safety interlocks so the whole test hall is managed from one place and operators are physically separated from the high-voltage area.
Artificial Rain Test Room
Rain test area with at least 4.5 m clear internal height, waterproof treatment on roof and walls, a seepage drainage floor with ring drainage channel, waterproof lighting, plus water supply and 6 m³/h drainage capacity. Used for wet withstand and rain tests on outdoor equipment and insulators.
Services We Provide
Our service team supports you from project planning through after-sales maintenance, ensuring your test systems operate reliably for years.
- Technical consultation and test scheme design
- Equipment selection and configuration recommendation
- Factory acceptance testing and calibration
- On-site installation, commissioning, and training
- Spare parts supply and preventive maintenance
- Software upgrades and remote diagnostics
Need a Datasheet?
Send us the product name or your test requirements. We will reply with specifications, photos, videos, and a formal quotation within 24 hours.
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