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KDYD2845kV Winding inter turn impulse withstand voltage tester

The KDYD-2845kV Intelligent Turn-to-Turn Withstand Voltage Tester is primarily used in industrial environments with strict requirements for electrical insulation performance and large-scale production or maintenance. Its typical application settings have the following characteristics:

  1. Motor and Transformer Manufacturing Workshops/Production Lines: This is the primary application scenario. The instrument is integrated into the final stage of production lines for motors (especially medium and large AC/DC motors) and transformers, serving as a mandatory safety inspection before delivery. On the production line, operators use its "one-button test" and automatic judgment features to perform rapid and efficient turn-to-turn insulation tests on every finished product, ensuring no critical defects like inter-turn short circuits are present before shipment.

  2. Large Equipment Maintenance and Repair Shops: In power plants, heavy machinery factories, or specialized motor repair centers, the instrument is used to verify the condition of motors, generators, and large transformers undergoing repair or overhaul. By comparing the test waveforms with original standard waveforms or those from normally functioning units of the same model, technicians can accurately determine whether the windings were damaged during repair and if the turn-to-turn insulation has been restored to good condition.

  3. Research and Quality Inspection Laboratories: In university, research institute, or third-party testing laboratories, the instrument is used for insulation performance research on new materials and processes, as well as for type testing of products. Its high output voltage of up to 45kV and precise waveform analysis capabilities allow it to simulate extreme operating conditions, providing critical data for evaluating the dielectric limits of new insulating materials and verifying the reliability of product designs.

  4. Environmental Requirements: Due to its large size (180kg cabinet-type unit) and equipped with casters, the instrument is typically placed in a spacious, indoor environment with a level floor. According to the documentation, its normal operating temperature range is 0–40°C, with relative humidity not exceeding 80% at 40°C. Therefore, it should be avoided in harsh environments that are damp, dusty, or subject to drastic temperature changes to ensure test accuracy and equipment longevity. Its sloped display and ergonomic layout also require adequate lighting and workspace in the operating area.

In summary, the KDYD-2845kV Intelligent Turn-to-Turn Withstand Voltage Tester serves three major fields: industrial manufacturing, equipment maintenance, and scientific research/testing. Its application environment emphasizes safety, standardization, and rigorous quality control.

KDYDJ-6kVA100kV Power frequency withstand voltage test series transformer

The KDYDJ-6kVA/100kV Series Resonant Power Frequency Withstand Voltage Test Set, comprising its compact control box and lightweight oil-immersed test transformer, is ideally suited for on-site preventive maintenance and acceptance testing of medium-voltage electrical equipment in power distribution networks.

A typical scenario involves a team from a municipal power supply company conducting routine insulation checks on newly installed or repaired equipment at a 10kV substation. The technicians need to verify the integrity of components such as:

  • High-Voltage Switchgear: Testing the insulation strength between phases and between phases and ground.
  • Power Cables (10kV): Performing AC withstand voltage tests on cable runs after installation or repair.
  • Insulators and Bushings: Checking their ability to withstand operating overvoltages.
  • Distribution Transformers: Conducting routine dielectric tests.

In this field environment, the test set's features are crucial:

  1. Its small size, light weight (52kg for the transformer), and integrated wheels allow easy transportation into confined substations and quick setup without heavy lifting equipment.
  2. The user-friendly control box (18kg) provides precise, step-less voltage regulation from 0-250V input to smoothly ramp up the high voltage output to the required 50kV AC, with clear monitoring and reliable operation.
  3. The robust design of the oil-immersed transformer, with its high-quality core and insulation materials, ensures stable performance and accurate test results even in varying outdoor conditions.
  4. The integrated 100V metering winding allows for safe and accurate measurement of the high-voltage output through a standard voltmeter.

By applying the specified high voltage (e.g., 42kV for a 10kV system) for a duration like 1 minute, engineers can assess the insulation level, identify any potential defects (such as cracks or moisture ingress), and ensure the equipment meets safety standards before being energized, thereby guaranteeing the reliability and safety of the power grid. The device's portability, ease of use, and reliable performance make it an essential tool for such field applications.

KDZK-F Generator rotor AC impedance tester Generator rotor impedance tester Impedance tester

Core Application Scope

The instrument is a specialized device used to detect inter-turn short circuits in generator rotor windings. By measuring parameters such as the rotor winding's AC impedance and power loss under different conditions, and plotting its characteristic curves, it diagnoses the health status of the rotor winding.

Specific Application Scenarios

  1. Power Systems and Power Generation Enterprises:

    • Synchronous Generator Testing: Widely used in thermal, hydro, nuclear, and renewable energy power plants (such as wind power) for routine maintenance and condition assessment of synchronous generators of all capacities.
    • Asynchronous Motor Testing: Can also be used to measure the rotor AC impedance of asynchronous motors.
  2. Test Conditions:

    • Static Testing: Measurements are performed when the generator is shut down.
    • Dynamic Testing: Measurements are taken while the generator is rotating (at different speeds) to obtain a more comprehensive impedance characteristic curve.
  3. Multi-Function Extended Applications: The instrument is typically multifunctional and can also be used for:

    • Single-Phase Transformer Tests: Performing open-circuit and short-circuit tests.
    • Transformer Tests: Measuring the volt-ampere characteristics of voltage transformers (VT) and current transformers (CT).
    • Arc Suppression Coil Tests: Measuring the volt-ampere characteristics of arc suppression coils.
  4. Other Application Fields:

    • Large Manufacturing Enterprises: Used for maintenance of large motor equipment within factories.
    • Research Institutions: Used for research and testing related to power systems.

In summary, the Generator Rotor Impedance Tester is primarily used in power systems, various power plants, and large industrial enterprises for preventive testing and fault diagnosis of rotor windings in critical rotating equipment such as generators and motors, ensuring safe and stable operation of the equipment.

The KDZR-ZL Safety shoe anti-static tester

This instrument is a specialized device developed in accordance with national regulations for measuring the resistance of conductive shoes. It has the characteristics of small size, light weight, and high accuracy. The instrument adopts a touch screen integrated design, with simple operation and one click testing. It is equipped with a micro printer, which can print in real-time or query.

KDJB-S30 Handheld three-phase relay protector

Applications

The Portable Relay Protection Tester is widely used in the commissioning, maintenance, and troubleshooting of power system protection and automation equipment. Its precision output, flexible test modes, and rugged handheld design make it an essential tool in a variety of electrical engineering environments:

  • Substation Commissioning & Maintenance
    Perform on-site testing of protective relays, including overcurrent, distance, differential, and directional relays, ensuring correct settings and reliable operation before energization.

  • Power Generation Plants
    Verify generator protection schemes such as differential protection, loss-of-excitation, reverse power, and low/high frequency tripping functions.

  • Transmission and Distribution Networks
    Test underfrequency load shedding (UFLS) relays, auto-reclosing (AR) logic, and synchronization check (sync-check) devices to maintain grid stability and restore service efficiently after faults.

  • Industrial Power Systems
    Validate motor protection relays, transformer differential relays with harmonic restraint, and feeder protection in manufacturing, mining, and petrochemical facilities.

  • Railway & Traction Power Systems
    Conduct protection tests on AC/DC traction substations where compact, battery-powered equipment is required for field access.

  • Renewable Energy Installations
    Commission protection systems in solar PV plants and wind farms, particularly for islanding detection, anti-islanding protection, and grid-synchronization verification.

  • Relay Manufacturing & Calibration Labs
    Use as a portable reference source for factory acceptance tests (FAT), R&D validation, and periodic calibration of protection IEDs.

  • Training & Education
    Support hands-on training for engineers and technicians in relay behavior, fault simulation, and protection logic analysis.

With its comprehensive test functions—including manual output, state sequencing, harmonics injection, and millisecond-level timing—the tester ensures accurate evaluation of both conventional electromechanical relays and modern digital protection devices in diverse operational scenarios.

KDZD5550 Insulation material withstand voltage test voltage breakdown testing machine

This device is mainly suitable for testing the breakdown strength and voltage resistance of solid insulation materials (such as plastics, rubber, laminated materials, films, resins, mica, ceramics, glass, insulation paints, and other insulation materials and components) under power frequency voltage or DC voltage. Widely used in the design and manufacturing of high-voltage breakdown tests in the power electronics industry, the Ministry of Machinery Industry, research institutes, military research, and insulation material production units.

Safety Helmet Impact and Penetration Tester

The KDJ5-AMI Safety Helmet Impact and Penetration Tester is widely used in various industries and research institutions to ensure the safety and reliability of protective headgear. Below are key application scenarios:

  1. Construction Industry
    On construction sites, this tester is essential for quality control of safety helmets used by workers. It enables on-site or laboratory-based inspection of newly procured helmets, verifying their ability to absorb impact energy and resist penetration from falling objects, thus ensuring compliance with national safety standards such as GB/T 2811-2007 and GB/T 2812-2006.

  2. Mining and Tunneling Operations
    In underground mining and tunneling environments where the risk of rock falls and sharp object impacts is high, the tester is used to evaluate the protective performance of safety helmets under extreme conditions, ensuring that head protection equipment meets rigorous safety requirements.

  3. Power and Electrical Utilities
    Utility companies use this equipment to test helmets designed for electrical work, ensuring they provide adequate impact and penetration resistance while maintaining compliance with industry-specific safety protocols.

  4. Occupational Safety Laboratories
    Governmental and third-party testing laboratories employ the KDJ5-AMI tester for certification, routine inspection, and comparative analysis of safety helmets from different manufacturers. Its high-precision sensors and automated data processing ensure reliable and repeatable test results.

  5. Research and Development
    Helmet manufacturers and material scientists use the tester during the product development phase to evaluate new materials, designs, and structural improvements. The accurate force measurement and peak value recording support innovation in lightweight, high-strength protective headgear.

  6. Industrial Manufacturing
    In factories and industrial plants, especially those with overhead operations or heavy machinery, regular testing of safety helmets ensures ongoing worker protection and adherence to occupational health and safety regulations.

  7. Emergency Response and Rescue Services
    Firefighters, rescue workers, and other emergency personnel rely on high-performance helmets. This tester helps verify that their helmets can withstand extreme mechanical stress during operations.

With its robust design, automated control system, and compliance with international testing standards, the KDJ5-AMI Safety Helmet Impact and Penetration Tester serves as a critical tool in safeguarding human life across high-risk industries.

Wireless High-Voltage Voice Digital Display Phasing Set Phasing Detector

In a busy urban substation, maintenance engineers are preparing to synchronize two 10kV power lines after routine upgrades. To ensure safe and accurate phase alignment, they deploy the KDZD3540 Wireless High-Voltage Phasing Detector specifically designed for switchgear applications.

Standing at a safe distance outside the metal-enclosed switchgear (MNS type), the technicians place the compact detectors near the A, B, and C phase conductors inside the cabinet without any direct contact. The wireless system transmits real-time phase data to the main receiver unit, which features a 3.5-inch color LCD screen. Within seconds, the device simultaneously displays the phase angles, voltage levels, and sequence information for all three phases.

Thanks to its clear digital display and voice guidance—announcing "Same Phase" or "Different Phase"—the team quickly confirms correct phasing before closing the circuit breaker. The built-in data storage records the results for documentation, and the wireless range of up to 30 meters allows flexible positioning even in tight or hazardous environments.

This non-contact, wireless solution minimizes arc flash risks, enhances operational efficiency, and ensures compliance with international safety standards such as IEC 61481 and DL/T 971—2017, making it ideal for live-line work in modern power distribution systems

KDHG-HT Comprehensive tester for transformer characteristics

KDHG-HT All-in-One Transformer Tester is designed for versatile use in diverse environments, including:

  1. Power System Maintenance

    • Routine inspection of CTs/PTs in substations and power grids to ensure operational safety and compliance with standards (e.g., GB1207, GB1208).
    • Field testing for fault diagnosis, insulation verification, and performance evaluation under real-world conditions.
  2. Factory Acceptance Testing

    • Quality control in manufacturing facilities to validate CT/PT specifications, including excitation curves, ratio accuracy, and polarity before deployment.
  3. Research & Development Laboratories

    • Characterization of CT/PT behavior under varying loads, voltages, and currents for R&D purposes, supporting innovation in electrical engineering.
  4. Field Commissioning

    • On-site testing during installation of new equipment, ensuring accurate calibration and eliminating errors in critical infrastructure projects.
  5. Educational & Training Institutions

    • Hands-on training for students and technicians on CT/PT principles, testing methodologies, and fault analysis.

KDJB-1200Y Six-Phase Microprocessor Relay Protection Tester – Secondary Protection Calibration Instr

The KDJB-1200Y Six-Phase Relay Protection Tester is ideally suited for use in power substations, power plants, and electrical testing laboratories. It is widely applied in commissioning, routine maintenance, and troubleshooting of modern digital and electromechanical protection relays in high-voltage and medium-voltage power systems. The instrument performs reliably in field environments with variable temperature and humidity, making it a trusted tool for protection engineers during system upgrades, relay calibration, and fault simulation tests. Its robust design and portable size also make it effective in mobile testing units and on-site service operations.

KDDT-10A Portable Ground Grid Conductivity Tester

The KDDT-10A Ground Conductance Tester is designed for a wide range of environments where grounding system integrity and safety are critical:

  1. Industrial Facilities:

    • Used in manufacturing plants, chemical factories, and heavy machinery to test grounding connections of high-voltage equipment, ensuring operational safety and compliance with industrial standards.
    • Resists dust, vibration, and moderate humidity (≤80% RH), suitable for harsh production environments.
  2. Power Systems:

    • Deployed in substations, power stations, and transmission networks to measure grounding electrode resistance and bonding continuity.
    • Operates reliably in outdoor conditions (e.g., temperature range: -10°C to 40°C) and withstands electromagnetic interference for accurate readings.
  3. Building Infrastructure:

    • Applied in commercial and residential buildings to evaluate lightning protection systems, grounding rods, and electrical panel connections.
    • Compact and portable design allows testing in confined spaces, such as electrical rooms or utility tunnels.
  4. Research & Development:

    • Utilized in laboratories for material testing, grounding performance analysis, and R&D of new grounding technologies.
    • High precision (±(0.5%+2d)) ensures reproducible results for scientific studies.
  5. Outdoor & Remote Sites:

    • Designed for fieldwork in remote areas, construction sites, or temporary installations where grounding systems need periodic verification.
    • Durable casing and 10A DC output ensure stability in fluctuating environmental conditions.

Environmental Tolerance:

  • Temperature: -10°C to 40°C
  • Humidity: ≤80% RH (non-condensing)
  • Durability: Shock-resistant housing, anti-corrosion components, and continuous operation capability.

Smart Enamel Wire Softening Breakdown Testing Machine with Integrated Detection and Analysis

The KDZD-JC Softening Breakdown Tester is specifically designed for evaluating the insulation performance of enameled round wires, film-wrapped round wires, and flat wires with a conductor diameter of 0.020mm to 3.000mm or flat wires up to 10mm×2mm in size after thermal softening. It complies with international and national standards such as GB/T4074.6-2008/IEC 60851-6 and JB/T4279.8-2008, making it suitable for quality control in wire and cable production, R&D validation of new materials or processes, and standard compliance testing. The device automates critical functions including temperature measurement, control, and adjustment, as well as the application of load and voltage to the sample, with automatic detection of breakdown events through precise current thresholds (5±0.5mA for fixed-temperature methods and 20±1mA for rising-temperature methods). Its capabilities span fixed-temperature testing (heating to a target temperature before evaluation) and rising-temperature testing (direct heating with voltages of 100V±10V or 155V±10V), ensuring reliable data for assessing insulation integrity under thermal stress. The tester’s compact design (450×380×500mm) and automated workflow, including preheating, load application, and real-time monitoring, make it ideal for laboratories, manufacturing facilities, and research institutions requiring high-precision, repeatable results in compliance with rigorous industry standards.

Ultra high voltage withstand mobile testing machine, power frequency intelligent induction AC series

Application Scenario: KDXB(L)-100kVA/100kV Mobile High-Voltage Withstand Test System

The KDXB(L)-100kVA/100kV Mobile High-Voltage Withstand Test System is specifically designed for on-site insulation testing of high-voltage systems in the rail transit industry. It is widely used in maintenance depots and manufacturing facilities for high-speed trains, EMUs (Electric Multiple Units), and urban rail vehicles.

In a typical application, the mobile test unit is wheeled directly to the train maintenance bay. Engineers connect the high-voltage output terminal of the system to the train’s main high-voltage power cable, while grounding the return path securely. The capacitive load of the cable (up to 0.031μF) is automatically recognized by the system, which then initiates an automatic resonant tuning process to achieve optimal test conditions at 50Hz.

Using the intuitive touch-screen interface on the control trolley, operators set the required test voltage—up to 100kV AC—and duration (typically 60 minutes). Once initiated, the system automatically ramps up the voltage, monitors real-time parameters (high-voltage, current, frequency), and maintains a stable output with less than 1.0% voltage fluctuation. If any abnormality occurs—such as flashover, overcurrent, or overvoltage—the system immediately triggers protective shutdown mechanisms, ensuring safety for both personnel and equipment.

After the test is completed, the system automatically reduces the voltage and cuts off the power supply. Test results, including peak voltage, duration, and any fault events, are saved internally and can be printed or exported via USB for documentation and compliance reporting.

Thanks to its modular, split-body design, the system is easy to transport and assemble on-site. The rugged construction, integrated casters, and shock-absorbing mounts make it ideal for industrial environments. Meeting international standards such as GB/T 16927 and IEC 60270, this mobile test solution provides a reliable, efficient, and safe method for performing high-voltage withstand tests in real-world conditions.

Termination Oil Cable Testing Terminal

The applications covered include routine cable testing according to IEC, ANSI/IEEE, and other national standards

KDZR-ZH 10A DC Resistance and Transformer Ratio Integrated Tester

The application scenarios of the "KDZR-ZH" distribution transformer direct resistance ratio comprehensive tester mainly focus on the maintenance, repair, and troubleshooting of the power system. Specific application scenarios include but are not limited to the following aspects:

Regular inspection of distribution transformers: For operating distribution transformers, regular DC resistance and transformation ratio tests can help detect equipment aging and operational status, ensuring their normal operation.
Acceptance testing after new installation or maintenance: After the installation or maintenance of a new distribution transformer is completed, the use of this tester can verify whether the equipment is correctly installed and whether the maintenance is effective, ensuring that the equipment can be safely connected to the power grid for operation.
Troubleshooting: When a distribution transformer malfunctions, direct current resistance and transformation ratio tests can quickly locate the problem, such as winding short circuits, open circuits, etc., to guide the repair work.
Expansion or renovation of power system: When expanding or renovating the power system, it is necessary to test the newly added distribution transformers to ensure that they meet the system requirements and can seamlessly integrate with the existing system.
On site portable testing requirements: Due to the use of large capacity lithium batteries for power supply, this tester is particularly suitable for on-site environments without stable external power supply, such as remote distribution stations or outdoor temporary electrical facilities for testing.

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