 Standard 4-Phase Voltage and 3-Phase Current Output:** Features a 4-phase voltage and 3-phase current output configuration, allowing for convenient combination outputs to facilitate various types of protection testing. Each voltage phase can output up to 120V, while the three current phases can be connected in parallel to output up to 120A. The fourth voltage phase (Ux) serves as a multi-functional voltage source; it can be configured to output 3U0 (three times the zero-sequence voltage), a synchronizing voltage, or any specific arbitrary voltage value.

 Convenient Standalone Operation:** The unit supports standalone operation via a large-screen LCD display and a user-friendly, flexible rotary encoder (acting as a "rotary mouse"). All interface text is displayed in Chinese. It is capable of performing the majority of on-site testing and verification tasks, including the calibration of various relays and microprocessor-based protection systems. Furthermore, it can simulate complex transient, permanent, and evolving faults to conduct comprehensive system-level testing. The device is ready for immediate use upon power-up, ensuring quick and convenient operation.

 Dual Operation Modes: PC-Connected Operation:** When connected to a PC running the full suite of Chinese-language operating software on the Windows platform, the device can perform large-scale, complex, and highly automated verification tasks. This includes conveniently testing and scanning various protection settings, storing test data in real-time, displaying vector diagrams, plotting fault waveforms, and printing test reports directly from the connected computer.

 Powerful Software Functionality:** Capable of executing a wide range of complex and highly automated verification tasks—such as three-phase differential protection testing, fast transfer schemes for plant auxiliary power, automatic transfer switch (ATS) testing, and line protection schemes involving synchronizing checks and reclosing. The software facilitates the easy testing and scanning of protection settings, fault playback, real-time data storage, vector diagram display, and online report generation.

 Abundant Digital I/O Contacts:** Features 7 digital input channels and 2 pairs of dry contact outputs. The input contacts are compatible with both dry contacts (potential-free) and potential-bearing contacts (0–250V), featuring intelligent automatic recognition. Both input and output contacts can be expanded to meet specific user requirements.

 Large-Screen LCD Display:** The unit is equipped with a large, high-resolution 320×240 dot-matrix graphic LCD display. All operational parameters are configured directly on the screen; both the user interface and test results are displayed in Chinese, providing a clear and intuitive visual experience.

 Comprehensive Self-Protection:** Incorporates a rationally designed heat dissipation structure, along with a suite of reliable and comprehensive protection measures—including power supply soft-start functionality—to ensure operational safety. It also features built-in fault self-diagnosis and interlocking capabilities to prevent damage in the event of system anomalies.  Independent, Dedicated DC Power Output: The device features a dedicated, adjustable DC power output channel offering both 110V and 220V options.

 High Cost-Effectiveness: As a product of interdisciplinary collaborative design, it integrates advanced technological achievements from multiple specialized fields. It combines the high-performance capabilities typically found in large-scale testing equipment with the affordable pricing of compact testers, thereby offering an exceptional price-performance ratio.

Section 2: Rated Parameters

AC Current Output

Output Accuracy: Class 0.5

Phase Current Output (RMS): 0–40 A

Three-Phase Parallel Current Output (RMS): 0–120 A

Allowable Continuous Phase Current (RMS): 10 A

Maximum Phase Current Output Power: 400 VA

Maximum Output Power (Three-Phase Parallel Mode): 1000 VA

Allowable Operating Duration (Three-Phase Parallel Mode): 10 s

Frequency Range (Fundamental): 20–1000 Hz

Harmonic Order: 1st–20th

DC Current Output

Output Accuracy: Class 0.5

Current Output: 0–±10 A per phase; 0–20 A (two phases superimposed)

Maximum Output Load Voltage: 20 V

AC Voltage Output

Output Accuracy: Class 0.5

Phase Voltage Output (RMS): 0–120 V

Line Voltage Output (RMS): 0–240 V

Phase/Line Voltage Output Power: 80 VA / 100 VA

Frequency Range (Fundamental): 20–1000 Hz

Harmonic Order: 1st–20th

DC Voltage Output

Output Accuracy: Class 0.5

Phase Voltage Output Amplitude: 0–±160 V

Line Voltage Output Amplitude: 0–320 V

Phase/Line Voltage Output Power: 70 VA / 140 VA