The KDJB-1200Y is a high-precision, six-phase relay protection tester designed for comprehensive testing of power system protection devices. It delivers flexible voltage and current outputs with excellent accuracy and stability, supporting a wide range of test scenarios including overcurrent, impedance, and transient fault simulations. Equipped with advanced DSP technology, a high-fidelity linear amplifier, and multiple digital interfaces, it ensures reliable, efficient, and automated protection system calibration. Compact and portable, it's ideal for field and laboratory use in power systems.
The KDDT-10A Ground Conductance Tester is a high-precision device designed for measuring the conductivity and contact resistance of grounding systems, ensuring electrical safety and reliability in power systems, industrial equipment, and building infrastructure. Compliant with DL/T475-2006 (Guidelines for Measuring Grounding System Parameters), it delivers accurate results for grounding electrode resistance, bonding integrity, and network continuity.
The KDZD-JC softening breakdown tester follows the standard GB/T4074.6-2008/IEC 60851-6; Inspection standard: JB/T4279.8-2008, suitable for testing the insulation performance of enameled round wires and thin film wrapped round wires with a nominal diameter of 0.020mm to 3.000mm and below, as well as flat wires with a diameter of 10mm to 2mm and below, after softening in a hot state. The instrument can automatically measure, control, adjust and display temperature; According to the set preheating time, target temperature, and test time, the instrument automatically completes the preheating of the sample, applies load, and test voltage. When the test time is reached or the sample is broken down, it automatically unloads the load and alarms, and displays the test time and temperature. The entire testing process is automatically completed.
The KDZD5550 series cable testing terminal is used for AC testing and measurement of partial discharge and tan δ plastic insulated medium voltage cables. These cable terminals are oil insulated.
Its main features include easy operation, short cable preparation time, and short setup time.
The cable end can be prepared far away from the testing laboratory, and the cable can be easily installed on the terminal. Under normal circumstances, the insulation oil (commercially available mineral oil) used in cables can be used at the terminal for several months before replacement or filtration is required.
Application scope
The fully automatic dielectric loss tester is suitable for measuring the dielectric loss tangent and capacitance of various high-voltage power equipment. It has the characteristics of small size, light weight, and easy portability, as well as the advantages of simple operation, automatic measurement, intuitive reading, no need for conversion, high accuracy, and strong anti-interference ability. In addition, the fully automatic dielectric loss tester also supports external power supply and various specifications of high voltage level standard capacitors to measure high voltage dielectric loss. This instrument has added a Chinese menu function, making operation simpler and more convenient. With one operation, the microcomputer automatically completes the entire measurement process, making it a commonly used dielectric loss measurement device
As a professional level grounding resistance tester, KDD400, with its multifunctional integration, high-precision measurement, intelligent data management and other characteristics, can meet the needs of complex grounding system detection in industries such as power and communication. Its advantages lie in:
Progressiveness of technology: combining innovative technologies such as pole changing method and double clamp method to adapt to diversified scenes.
User friendly design: From hardware portability to software interactivity, it reflects humanized considerations.
Security and Compliance: Through multiple international certifications, ensure the safety of operators and equipment.
High resolution manual focusing, built-in high-performance 12 μ m 384 × 288 infrared thermal imaging core, equipped with a 5-megapixel visible light camera, 35mK thermal sensitivity, precise manual focusing function, USB plug and play analysis.
Primary Function
The PD-Free Test Transformer/Equipment is designed to:
Detect and suppress partial discharge (PD) phenomena in high-voltage electrical equipment during factory testing or preventive maintenance, ensuring the insulation performance meets safety and quality standards under high-voltage conditions.
Key Functional Details
Partial Discharge Detection
Apply high voltage (e.g., 1.5–3 times the rated voltage) to simulate extreme operating conditions and detect weak partial discharge (PD) within the equipment.
PD may cause insulation degradation, reduced equipment lifespan, or sudden failures (e.g., transformer breakdown, cable insulation burnout).
Insulation Performance Verification
Verify the long-term stability of equipment under high voltage, ensuring compliance with international standards (e.g., IEC 60270, GB/T 7354) for PD magnitude limits.
Example: Mandatory PD-free testing for critical equipment like power transformers, GIS switchgear, and cable accessories before factory release.
Withstand Voltage Testing
Combined with "withstand voltage tests," verify the equipment's ability to endure short-term high-voltage surges (e.g., lightning strikes, switching overvoltages) while monitoring discharge behavior.
Prevent insulation breakdown risks caused by PD.
Preventive Maintenance
Regular PD-free testing in power system maintenance to identify potential defects such as insulation aging, moisture ingress, or mechanical damage.
Technical Features
Low Corona Discharge Design: Specialized transformer structure (e.g., shielded windings, high-purity insulation materials) minimizes self-generated corona discharge interference.
High-Precision Measurement System: Equipped with PD detectors to quantify discharge magnitude (unit: pC, picocoulombs).
Multi-Voltage Adaptability: Supports AC, DC, and lightning impulse voltage tests (e.g., 10 kV–500 kV).
Typical Applications
Factory testing of power transformers, reactors, bushings, etc.
Insulation verification of high-voltage cable accessories (e.g., joints, terminations).
Insulation testing for wind power, photovoltaic, and other renewable energy equipment.
Research on discharge characteristics of new insulation materials/structures in laboratories.
Why PD-Free Testing Is Critical?
Partial discharge is an early indicator of insulation failure. Even minor discharges (<10 pC) can accumulate over time, leading to equipment malfunctions. PD-free testing ensures:
✅ Prevention of sudden insulation breakdown
✅ Extended equipment lifespan
✅ Compliance with grid safety requirements
Let me know if you need further refinements or application-specific details!
KDYDJ-5kVA/30kV intelligent industrial frequency withstand voltage test device product implementation standard: DL/T 845.1 2004. Adopting microelectronic chip processing technology, touch screen control and wireless mobile phone APP operation, the operation is simple and clear. After all the parameters are set, the test is automatically carried out without manual intervention.
