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Secondary injection testing device UHV-702
voltageautomaticprotection relay

Secondary injection testing device - UHV-702 - Wuhan UHV Power Technology Co.,Ltd. - voltage / automatic / protection relay
Secondary injection testing device - UHV-702 - Wuhan UHV Power Technology Co.,Ltd. - voltage / automatic / protection relay
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Go to the Wuhan UHV Power Technology Co.,Ltd. website for more information

Characteristics

Test type
voltage
Operating mode
automatic
Test material
protection relay
Technology
secondary injection

Description

Product Overview
  • The Microcomputer Relay Protection Tester has been developed in reference to the Technical Conditions for Microcomputer Relay Protection Test Devices (Discussion Draft) issued by the relevant ministry, while extensively incorporating user feedback and summarizing the strengths and weaknesses of similar products currently available in the market. By fully utilizing modern advanced microelectronics technology, this new compact device represents a significant advancement in microcomputer relay protection testing.
  • Equipped with a large-screen LCD display and a flexible, convenient rotary mouse controller, the tester offers powerful standalone operation capable of performing most test tasks. When connected to a computer, it provides even more advanced functionality. With its compact size and high accuracy, the instrument combines the superior performance and advanced features of large-scale testers with the flexibility, ease of operation, high reliability, and cost-effectiveness of smaller units. It is an ideal tool for maintenance professionals.

Product Characteristics
  • Standard 4-Voltage, 3-Current Output: Provides 4-phase voltage and 3-phase current output, enabling a wide range of combined outputs for various protection tests. Single-phase voltage can output up to 120V, and single-phase current up to 40A (10 seconds). The three-phase current combined output can reach up to 120A. The fourth-phase voltage Ux is a multifunctional voltage channel, configurable as 3U0, synchronization voltage, or a specified voltage value as needed.
  • Easy Standalone Operation: The unit features a large LCD screen operated via a convenient and flexible rotary mouse, with full Chinese display. It can perform most field test and verification tasks, supporting various types of relays and microcomputer protection, as well as simulating complex transient, permanent, and transformational faults for complete system testing. Ready for use upon startup with simple operation.
  • Dual Operation Modes: When connected to a computer, the system operates via a comprehensive Chinese software suite on the Windows platform. It supports large-scale, complex, and highly automated verification tasks, including easy testing and scanning of various protection settings, real-time test data storage, vector diagram display, fault waveform plotting, and online report printing.
  • Powerful Software Capabilities: The software supports a wide range of highly automated and complex verification tasks, such as three-phase differential tests, auxiliary power fast switching, automatic transfer tests, line protection synchronization and reclosing tests, and more. It enables easy testing and scanning of protection settings, fault playback, real-time data storage, vector diagram display, and online report printing.
  • Rich Binary Contact Interface: Features 7 binary input contacts and 2 pairs of dry contact outputs. The input contacts are compatible with 0–250V potential signals with automatic identification. Input and output contacts can be expanded based on user requirements.
  • Large-Screen LCD Display: The microcomputer relay protection tester is equipped with a 320×240 high-resolution graphic LCD screen. All operating procedures are displayed on the screen, with both the operation interface and test results presented in Chinese for clear and intuitive viewing.
  • Self-Protection Features: Incorporates a well-designed heat dissipation structure, along with comprehensive and reliable protection measures, including power soft-start. It also features fault self-diagnosis and locking functions for enhanced safety.
  • Independent DC Power Output: The device includes a dedicated DC power output, providing both 110V and 220V outputs as standard.
  • High Cost-Performance Ratio: Developed through cross-disciplinary collaboration, the instrument integrates advanced technological achievements from multiple fields. It combines the performance of large-scale testers with the affordability of compact models, offering exceptional value.

Product Parameters
  • Ac current output
  • Output precision: 0.2 class
  • Phase current output (effective value): 040A
  • Triple current output (effective value): 0120A
  • Long-term permissible operating value of phase current (effective value): 10A
  • Maximum output power of phase current: 450VA
  • Output power at maximum output of three-phase parallel current: 900VA
  • Three parallel current maximum output allowable operating time: 10s
  • Frequency range (fundamental wave): 0~ 1000Hz (online) 0~300Hz (stand-alone)
  • Harmonic frequency: 0~ 20 times (online) 0~6 times (stand-alone)
  • DC current output
  • Output precision: 0.5 class
  • Output current: 0 ~ ±10A/ phase, 0 ~ ±30A/ terad
  • Maximum output load voltage: 20V
  • AC voltage output
  • Output precision: 0.2 class
  • Phase voltage output (effective value): 0120V
  • Line voltage output (effective value): 0240V
  • Phase voltage/line voltage output power: 80VA/100VA
  • Frequency range (fundamental wave): 0~ 1000Hz (online) 0~300Hz (stand-alone)
  • Harmonic frequency: 0~ 20 times (online) 0~6 times (stand-alone)
  • DC voltage output
  • Output precision: 0.5 class
  • Phase voltage output amplitude: 0±160V
  • Line voltage output amplitude: 0±320V
  • Phase voltage/line voltage output power: 70VA/140VA

Attention:
  • When doing the time test of the relay, the automatic change interval is 0.3s, if normal action time is longer,the ‘Manual Operation’ testing mode should be selected.
  • When doing signal relay or polarized relay trial that has very small current (less than 20mA) , due to the large relay coil resistance (several hundred to several thousand ohm), it can not be used to test by current-output but voltage-output, you can get the action circuit using the action voltage divided by the coil resistant which measured by mutimeter.

Application field

  • 1. Power system
  • Line protection: The microcomputer relay protection tester can verify and test various relays (such as current, voltage, time, differential, frequency, etc.) and microcomputer protection devices in the power system. Conduct whole set tests by simulating various types of faults (such as transient and transitional faults) to verify whether the response of the protective device is correct.
  • Main transformer differential protection: In the differential protection of the main transformer, it can test the performance of the differential protection device to ensure accurate operation in the event of a fault and avoid damage to the main transformer.
  • Excitation control: The microcomputer relay protection tester can test the excitation control system to ensure that it can adjust the output power of the generator according to the needs of the power grid.

  • 2. Department of Electrical Manufacturing and Power Operation
  • In the electrical manufacturing department, microcomputer relay protection testers can be used in the research and development, production, and quality control processes of relays and protection devices. By simulating various fault scenarios, comprehensive performance testing is conducted on the product to ensure that it meets design requirements and standard regulations.
  • The power operation department uses microcomputer relay protection testers to regularly calibrate and maintain the protection devices in the power system. Through testing, problems with protective devices can be promptly identified and repaired or replaced to ensure the safe and reliable operation of the power system.

  • 3. Research and Teaching
  • Microcomputer relay protection tester is also one of the important experimental equipment in scientific research institutions and universities. Researchers can use it for theoretical research and experimental verification related to relay protection, promoting the development and innovation of relay protection technology. Meanwhile, universities can also use it as a teaching tool to help students better understand and master the basic principles and application methods of relay protection.

  • 4. Special fields such as railways and aviation
  • With the advancement of technology and the continuous expansion of application fields, microcomputer relay protection testers are gradually being applied in special fields such as railways and aviation. For example, in railway traction power supply systems, special differential protection devices are required to ensure the safety and reliability of power supply. The microcomputer relay protection tester can accurately test and verify these special devices, ensuring their stable operation in complex and changing working environments.

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Go to the Wuhan UHV Power Technology Co.,Ltd. website for more information

Other Wuhan UHV Power Technology Co.,Ltd. products

Relay Protection Tester

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.