KDJB-803 Microcomputer Relay Protection Tester features a meticulously designed chassis structure, offering a small volume, excellent heat dissipation, lightweight design, and easy portability, making it convenient for mobile testing. The instrument is equipped with self-protection functions, incorporating a reasonably designed heat dissipation structure and reliable, comprehensive protective measures, soft power start, as well as certain fault self-diagnosis and interlock capabilities.

1. Standard 4-phase voltage and 3-phase current output: It provides 4-phase voltage and 3-phase current output, enabling convenient combinations for various protection tests. Each phase voltage can output up to 120V, and the three-phase parallel current can output up to 120A. The fourth phase voltage Ux is a multi-functional voltage item that can be set as one of four types of 3U0 or synchronization check voltage, or any specific voltage value.

2. Convenient single-unit operation: The device is operated via a large screen LCD display with a flexible optical trackball mouse, fully displayed in Chinese. It can perform most on-site test verifications, including testing and calibration of various relays and microprocessor-based protections, and simulating various complex transient, permanent, and conversion faults for group tests. Ready to use upon startup, it offers quick and easy operation.

3. Dual operation modes, connectable to a computer: With full-featured Chinese operating software on the Windows platform, it supports large-scale and highly automated calibration tasks. It allows convenient testing and scanning of various protection settings, real-time storage of test data, vector diagram display, fault waveform drawing, and online report printing.

4. Powerful software functions: Capable of performing high-level automated calibration tasks such as three-phase differential testing, plant power fast switching, backup self-switching tests, line protection synchronization reclosing, etc. It facilitates testing and scanning of various protection settings, fault replay, real-time data storage, vector diagram display, and online report generation.

5. Rich switch input/output points: Equipped with 10 input channels and 8 pairs of open contacts outputs. Input contacts are compatible with open contacts and 0～250V potential contacts, capable of intelligent automatic recognition. Input and output contacts can be expanded according to user needs.

6. Large TFT display: Features a 640×480 pixel high-resolution true color TFT LCD screen. All operational processes are set on the display, with an intuitive Chinese interface and clear results display.

7. Self-protection: Designed with an efficient heat dissipation structure, it includes reliable multiple protection measures, soft power start, and certain fault self-diagnosis and interlock capabilities.

8. Independent dedicated DC power output: The device is equipped with one channel of 110V and 220V dedicated DC power output.

9. High performance-to-price ratio: A cross-disciplinary collaborative design product, integrating advanced scientific achievements from multiple fields. It combines the performance of large testers with the pricing of small testers, offering a high performance-to-price ratio.

AC Current Output

• Output Accuracy: ≤0.5A, ±2mA; >0.5A, 0.2%
• Phase Current Output (RMS): 0～40A
• Three-phase Parallel Current Output (RMS): 0～120A
• Continuous Operation Value of Phase Current (RMS): 10A
• Maximum Output Power of Phase Current: 420VA
• Maximum Output Power at Maximum Three-phase Parallel Current Output: 900VA
• Allowable Operation Time at Maximum Three-phase Parallel Current Output: 10s
• Frequency Range (Fundamental Wave): 20～1000Hz
• Harmonic Order: 1～20 orders

DC Current Output

• Output Accuracy: 0.5 class
• Current Output: 0～±10A / phase, 0～20A / two-phase superposition
• Maximum Load Voltage at Output: 20V

AC Voltage Output

• Output Accuracy: 0.2 class
• Phase Voltage Output (RMS): 0～120V
• Line Voltage Output (RMS): 0～210V
• Maximum Voltage Output Value: 0～240V
• Output Power of Phase Voltage/Line Voltage: 80VA / 100VA
• Frequency Range (Fundamental Wave): 20～1000Hz
• Harmonic Order: 1～20 orders

DC Voltage Output

• Output Accuracy: 0.5 class
• Amplitude of Phase Voltage Output: 0～±160V
• Amplitude of Line Voltage Output: 0～320V
• Output Power of Phase Voltage/Line Voltage: 70VA / 140VA

Digital Inputs and Outputs

• Digital Inputs: 10 channels, open contacts: 1～20mA, 24V; potential contact access: “0”: 0～ +6V; “1”: +11 V～ +250V
• Digital Outputs: 8 pairs, DC: 220V／0.2A; AC: 220V／0.5A

Time Measurement

• Measurement Range: 0.1ms ～ 9999s
• Measurement Accuracy: 0.1mS

Physical Dimensions and Specifications

• Dimensions: 65300165mm
• Weight: 15.5kg
• Power Supply: AC 220V±10%, 50/60Hz
• Operating Temperature: -10℃ ～ +50℃