KDJB-702 Microcomputer Relay Protection Tester, which already possesses powerful functions when operated as a standalone device, can perform most tests. When connected to a computer, it offers even more advanced operational capabilities. It is compact in size and highly precise. This tester combines the superior performance and advanced features of large-scale testers with the portability, ease of operation, and high reliability of smaller testers, offering an excellent performance-to-price ratio. It is a handy tool for relay protection professionals.

The Microcomputer Relay Protection Tester is also known by other names such as:

• Relay Protection Test Equipment
• Microcomputer Relay Protection Calibrator
• Microcomputer Relay Protection Instrument
• Relay Protection Tester
• Three-phase Relay Protection Tester
• Relay Protection Test Device
• Three-phase Relay Protection Test Device
• Three-phase Relay Protection Calibrator
• Relay Protection Calibrator
• Three-phase Relay Protection Calibrator
• Relay Protection Instrument

• Standard 4-phase voltage and 3-phase current output: It features 4-phase voltage and 3-phase current outputs, facilitating various combination outputs for different types of protection tests. Each phase can output up to 120V, with a maximum of 120A when three phases are paralleled. The fourth phase voltage Ux is a multi-functional voltage item that can be set as one of the four types of 3U0, synchronizing voltage, or any specific voltage value.
• Convenient single-unit operation: The single unit is operated via a large screen LCD display with a flexible rotating mouse, all in Chinese. It can perform most on-site testing and calibration tasks, calibrate various relays and microprocessor-based protections, and simulate complex transient, permanent, and transitional faults for comprehensive testing. Ready to use upon startup, it offers convenient and quick operation.
• Dual operation modes, connectable to PC: Using the full suite of Chinese operation software on the Windows platform, it can perform complex and highly automated calibration tasks. It allows easy testing and scanning of various protection settings, real-time storage of test data, display of vector diagrams, drawing of fault waveforms, and printing of reports online.
• Powerful software capabilities: It completes highly automated and complex calibration tasks, such as three-phase differential testing, fast switching of auxiliary power supplies in plants, backup auto-switching tests, line protection synchronization reclosing, etc. It facilitates testing and scanning of various protection settings, replay of faults, real-time storage of test data, display of vector diagrams, and printing of reports online.
• Rich contact points for digital signals: It includes 7 input channels and 2 pairs of open contacts for output. Input contacts are compatible with open contacts and 0～250V potential contacts, intelligently recognizing them automatically. Input and output contacts can be expanded based on user needs.
• Large LCD display: This device uses a high-resolution graphic LCD display with a resolution of 320×240 pixels. All operational processes are configured on the display, with interfaces and test results shown in Chinese, providing clear and intuitive displays.
• Self-protection: It adopts a rationally designed heat dissipation structure along with reliable and comprehensive protective measures, soft-start power supply, and certain self-diagnostic and interlock functions.
• Independent dedicated DC power output: The device is equipped with an adjustable dedicated DC power output of 110V and 220V.
• High cost-effectiveness: This is a cross-disciplinary collaborative design product, integrating advanced scientific achievements from multiple fields. It combines the performance of large-scale testers with the pricing of small-scale testers, offering a high performance-to-price ratio.

AC Current Output

• Output accuracy: 0.5 class
• Phase current output (RMS): 0～40A
• Three-phase parallel current output (RMS): 0～120A
• Long-term allowable working value of phase current (RMS): 10A
• Maximum output power of phase current: 400VA
• Maximum output power during three-phase parallel output: 1000VA
• Allowed operation time at maximum three-phase parallel output: 10s
• Frequency range (fundamental wave): 20～1000Hz
• Harmonic order: 1～20 times

DC Current Output

• Output accuracy: 0.5 class
• Current output: 0～±10A / per phase, 0～20A / two phases superimposed
• Maximum output load voltage: 20V

AC Voltage Output

• Output accuracy: 0.5 class
• Phase voltage output (RMS): 0～120V
• Line voltage output (RMS): 0～210V
• Maximum voltage output value: 0～240V
• Phase voltage/line voltage output power: 80VA / 100VA
• Frequency range (fundamental wave): 20～1000Hz
• Harmonic order: 1～20 times

DC Voltage Output

• Output accuracy: 0.5 class
• Phase voltage output amplitude: 0～±160V
• Line voltage output amplitude: 0～320V
• Phase voltage/line voltage output power: 70VA / 140VA

Digital Signal and Time Measurement

Dimensions and Weight