ND702A-3H Relay Protection Tester

Product Introduction

       The ND702A-3H Microcomputer Relay Protection Tester, also known as the Three-Phase Microcomputer Relay Protection Tester or Three-Phase Microcomputer Relay Protection Calibrator, is a specialized power testing instrument for relay protection. It features 4-phase voltage and 3-phase current output, making it suitable for testing various types of relay protection devices. Each phase voltage can output 125V, each phase current 30A, and the three-phase combined current can output 90A. The fourth phase voltage Ux is a multifunctional voltage item, which can be set to output 4 types of 3U0, synchronism check voltage, or any specific voltage value.

        The ND702A-3H Microcomputer Relay Protection Tester is developed based on the "Technical Conditions for Microcomputer-Based Relay Protection Test Equipment (Discussion Draft)" issued by the Ministry of Electric Power, incorporating extensive user feedback and summarizing the advantages and disadvantages of similar domestic products. It fully utilizes modern advanced microelectronic technologies and components to achieve a new compact microcomputer relay protection tester.

        This Three-Phase Microcomputer Relay Protection Tester uses a high-performance industrial computer as the control unit, running the Windows operating system directly. The device panel features an 8.4" TFT true-color LCD display, a touchpad mouse, and an optimized keyboard, allowing direct use without external mice or keyboards. The back panel includes USB ports, communication ports, etc., facilitating data storage, data communication, and software upgrades. The entire testing process and results are displayed on the LCD screen, with a full Chinese-language operating interface that is clear, bright, and intuitive. Operation is controlled via the touchpad and panel keyboard, making it simple and convenient. Basic computer knowledge is sufficient to master it easily. The Three-Phase Microcomputer Relay Protection Tester is an indispensable tool for relay protection testing professionals. 

Product Features

☆、Flexible Voltage and Current Output Combinations: The Three-Phase Microcomputer Relay Protection Tester has standard 4-phase voltage and 3-phase current output, allowing convenient combinations for various protection tests. Each phase voltage can output 125V, the three-phase combined current can output 90A, and the fourth phase voltage Ux is a multifunctional voltage item, which can be set to output 4 types of 3U0, synchronism check voltage, or any specific voltage value.

☆、Easy Operation: The Three-Phase Microcomputer Relay Protection Tester panel includes a trackball mouse, an optimized keyboard, and a large-screen TFT LCD display. It comes with built-in full Chinese Windows platform operating software, making it ready to use upon startup with convenient and fast operation.

☆、Dual Operation Modes: In addition to standalone operation, the Three-Phase Microcomputer Relay Protection Tester can also be operated via an external laptop or desktop computer. Both modes offer identical functionality, providing a truly complete dual operation mode.

☆、New High-Fidelity Linear Power Amplifier: The output end consistently uses high-fidelity, high-reliability modular linear power amplifiers instead of switching amplifiers, delivering excellent performance. It does not generate high or medium-frequency interference in the test environment and ensures smooth waveforms and high precision from large currents to微小 currents.

☆、High-Performance Host: The output section of this Three-Phase Microcomputer Relay Protection Tester uses DSP control, offering fast computation, strong real-time digital signal processing capabilities, wide transmission bandwidth, and control of high-resolution D/A conversion. The output waveforms are highly accurate with minimal distortion and excellent linearity. It incorporates numerous advanced technologies and precision components, along with a professional structural design, resulting in a compact, lightweight, fully functional, and portable device that is ready to work upon startup, making it highly convenient for mobile testing.

☆、Powerful Software Functions: This Three-Phase Microcomputer Relay Protection Tester can perform various highly automated large-scale complex calibration tasks, easily test and scan various protection settings, replay faults, store test data in real time, display vector diagrams, and print reports online.

☆、Independent Dedicated DC Power Supply Output: The device includes one dedicated adjustable DC power supply output of 110V and 220V.

☆、Complete Interfaces: The device panel has built-in keyboard and mouse for standalone operation, and it also supports external keyboards and mice via keyboard and mouse interfaces. It includes two USB ports and an RS232 port for communication with computers and other external devices.

☆、Protection Functions: The散热 structure is reasonably designed, with reliable and comprehensive hardware protection measures. The microcomputer relay protection tester features soft-start power supply, software self-diagnosis for faults, and output locking functions.

☆、Lightweight, Compact, and Highly Integrated Standalone and Integrated Structure: The Three-Phase Microcomputer Relay Protection Tester uses大量 high-tech精心 designed ultra-light compact structures, making the entire machine extremely small and lightweight.

Technical Parameters

☆、AC Current Source

      Single-phase current output (RMS): 0-30A/phase, accuracy: 0.2% ±5mA

      Three-phase parallel output (RMS): 0 - 90A/three-phase in-phase parallel output

      Three-phase current long-term allowable value: 10A

      Maximum output power per phase: 420VA

      Maximum output power for three-phase parallel current: 1000VA

      Maximum operating time for three-phase parallel current output: 10s

      Frequency range: 0 - 1000Hz, accuracy 0.01Hz

      Harmonic次数: 2 - 20 times

      Phase: 0 - 360°, accuracy 0.1°

☆、DC Current Source

      DC current output: 0--±20A/phase, accuracy: 0.2% ±5mA

☆、AC Voltage Source

      Single-phase voltage output (RMS): 0--125V/phase, accuracy: 0.2% ±5mV

      Line voltage output (RMS): 0--250V

      Phase voltage/line voltage output power: 75VA/100VA

      Frequency range: 0--1000Hz, accuracy: 0.001Hz

      Harmonic次数: 2--20 times

      Phase: 0--360°, accuracy: 0.1°

☆、DC Voltage Source

      Single-phase voltage output amplitude: 0--±150V, accuracy: 0.2% ±5mV

      Line voltage output amplitude: 0--±300V

      Phase voltage/line voltage output power: 90VA/180VA

☆、Switch量 Terminals

      Switch量 input terminals: 8 pairs

      Dry contact: 1--20mA, 24V device internal active output

      Potential flip: Passive contact: low-resistance short-circuit signal     Active contact: 0-250V DC

      Switch量 output terminals: 4 pairs, dry contact, breaking capacity: 110V/2A, 220V/1A

☆、Others

      Time range: 1ms--9999s, measurement accuracy: 1ms

      Volume and weight: Volume 410 x 190 x 420 mm, approximately 20Kg

      Power supply: AC220V±10%, 50Hz, 10A