ND802-3H Microcomputer Relay Protection Tester (Industrial Control Model)

Product Introduction

       The Microcomputer-Based Relay Protection Calibrator is a new type of compact microcomputer relay protection tester developed with reference to the DL/T624-1997 "Technical Conditions for Microcomputer-Based Relay Protection Test Devices" issued by the Ministry of Electric Power. It incorporates extensive user feedback, summarizes the advantages and disadvantages of similar domestic products, and fully utilizes modern advanced microelectronic technologies and components. This microcomputer relay protection tester can operate independently as a standalone unit or be connected to a laptop for operation. The main unit adopts a DSP+FPGA structure, features true 16-bit DAC output, and is equipped with a new modular high-fidelity linear high-power amplifier. It includes an 8.4-inch TFT true-color display with a resolution of 800×600 and industrial-grade keyboard and mouse. Running on the Windows XP operating system, it is powerful, compact, and highly accurate. It combines the superior performance and advanced functions of large testers with the compact size, flexibility, ease of operation, and high reliability of small testers, offering excellent value for money. It is an indispensable tool for relay protection professionals.

Product Features

       Utilizes the user-friendly Windows XP operating system with an intuitive interface, making operation simple and efficient. For user convenience, numerous keyboard shortcuts are defined, enabling "one-key" operations.

       Features a high-performance embedded industrial control computer and a large high-resolution color TFT LCD screen, providing rich and intuitive information such as the device's current working status, next-step prompts, and various help messages.

       Equipped with an ultra-thin industrial keyboard and touch mouse, allowing operations to be performed similarly to a standard PC via keyboard or mouse.

       Includes an external USB port for easy data storage and software maintenance.

       Capable of testing all items without requiring external devices, automatically displaying and recording test data, and generating vector diagrams and characteristic curves.

       Employs a high-performance D/A converter to produce waveforms with high precision, excellent linearity, and superior transient response and amplitude-frequency characteristics. Waveform accuracy and other specifications are guaranteed across the entire measurement range.

       Directly outputs AC voltage, AC current, DC voltage, and DC current with adjustable amplitude, phase angle, and frequency.

       The power amplifier section uses a new high-power, high-fidelity linear amplifier circuit, delivering high output power with minimal ripple interference. Even at maximum output current, the waveform remains undistorted and unclipped.

       The input interface automatically adapts to both passive (dry contact) and active signals, including polarity for active inputs, and operates reliably within an input voltage range of ±250V.

        Capable of performing complex calibration tasks, easily testing and scanning various protection settings, storing test data in real time, displaying vector diagrams, and printing reports.

        Features a well-designed chassis structure that is compact, with excellent heat dissipation, lightweight, portable, and convenient for field testing.

        Includes self-protection functions, a rationally designed heat dissipation structure, reliable and comprehensive multiple protection measures, soft-start power supply, and certain fault self-diagnosis and lockout capabilities.

Technical Parameters

AC Current Source

           Three-phase current source with common neutral point, current rise/fall time <100μs

Output power: 450VA per phase

Output accuracy: 0.1A～0.5A accuracy ±10mA

                    0.5A～10A accuracy ±0.2%

                    10A～40A accuracy ±0.5%

Resolution: 0.1A～10A resolution 1mA

              10A～40A resolution 5mA

Single-phase continuous output time: 0.1A～10A output time Unlimited

                              10A～20A output time ≥60 seconds

                              20A～30A output time ≥15 seconds

                              30A～40A output time ≥10 seconds

AC Voltage Source

           Four-phase voltage source with common neutral point, current rise/fall time <100μs

Output power: ≥75VA per phase

Output accuracy: 1V～5V accuracy ±10mV

                    5V～125V accuracy ±0.2%

Resolution: 1V～5V resolution 1mV

             5V～125V resolution 5mV

DC Current Source

          Single-phase output range: -10A～+10A or 0～20A

Output power: 300VA per phase

Output accuracy: ±0.1A～±1A accuracy ±10mA

                    ±1A～±10A accuracy ±0.5%

Resolution: 5mA

DC Voltage Source

          DC voltage output range: -150V～+150V or 0～300V

Output power: ≥100VA

Output accuracy: ±1V～±5V accuracy ±20mV

                    ±5V～±150V accuracy ±0.5%

Resolution: ±1V～±5V resolution 5mV

              ±5V～±150V resolution 10mV

AC Voltage and Current Source Phase Angle

           Phase angle range: 0°～360°

Accuracy: ±0.2°

Resolution: 0.01°

AC Voltage and Current Source Frequency

          Frequency range: 10～1500Hz

          Capable of superimposing 2nd to 20th harmonics of any amplitude and DC component

Output accuracy: 10Hz～65Hz ±0.001Hz

                     65Hz～1500Hz ±0.02Hz

Resolution: 0.001 Hz

Timing accuracy: 1ms～1S ±10ms

                 1S～999999S ±0.2%

Digital Inputs

        8 independent switch contact inputs, automatically recognizes polarity of active contacts

        Compatible with dry contacts and active contacts from 15V to 250V

Digital Outputs

        4 pairs of programmable switch dry contact outputs

        Contact rating: 250VDC, 0.5A or 250VAC, 0.5A

Synchronization

        Voltage and current synchronization ≤50μS

Power Supply

AC input voltage: Rated value: 220V ± 10%

                       Reference value: 220V ± 2%

AC supply frequency: Rated value: 50Hz ± 10%

                        Reference value: 50Hz ± 2%

Operating Environmental Conditions

          Ambient temperature: -10℃ to +40℃

          Relative humidity: ≤90%

Atmospheric pressure: 80 to 110kPa

Chassis Dimensions and Weight

           Chassis dimensions (L×W×H): 420mm×190mm×470mm

            Weight: 20 kilograms