Sold By :HUAYI ELECTRIC
Delivery duration : * 8 to 10 Days
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1. Four-Phase Voltage and Three-Phase Current Output
The tester provides four-phase voltage and three-phase current outputs, supporting flexible output combinations for various protection testing requirements. Each voltage phase can deliver up to 120 V, while the three current phases can deliver up to 120 A. The fourth voltage phase (Ux) is a multifunctional output that can be configured for 3U0, same-period voltage checking, or any required voltage value.
2. Easy Single-Unit Operation
The instrument features a user-friendly operating system with a large LCD screen and a convenient rotary control knob. Its fully Chinese-language interface allows users to perform most field testing and verification tasks independently. It supports testing of various protective relays and microcomputer-based protection devices, including simulations of instantaneous, permanent, and conversion faults for complete protection system testing. The device is ready to operate immediately after startup.
3. Dual Operating Modes
The tester supports both standalone operation and computer-connected operation. Through dedicated Windows-based software, users can perform complex and highly automated protection testing. Key functions include protection setting verification, automatic test scanning, real-time test data storage, vector diagram display, fault waveform analysis, and online test report printing.
4. Powerful Testing Software
The advanced software supports a wide range of automated and complex protection testing applications, including:
Three-phase differential protection testing.
Auxiliary power supply fast switching tests.
Backup automatic transfer (standby power switching) tests.
Line protection verification and automatic reclosing tests.
Protection setting verification and fault simulation.
Fault waveform playback and analysis.
Real-time data storage and vector diagram display.
Online test report generation and printing.
5. Flexible Contact Inputs and Outputs
The relay protection tester is equipped with seven contact inputs and two potential-free contact outputs. The input contacts support both potential-free contacts and voltage contacts ranging from 0–250 V, with intelligent automatic identification. Input and output contact capacity can also be expanded according to user requirements.
6. High-Resolution LCD Display
The instrument features a large 320 × 240 dot-matrix, high-resolution LCD screen. All operating procedures, settings, and test results are displayed through an intuitive Chinese-language interface, making operation simple and test information easy to understand.
7. Comprehensive Self-Protection Functions
The tester incorporates an optimized heat dissipation structure, multiple safety protection mechanisms, and a power supply soft-start function. It also includes fault self-diagnosis and automatic locking functions to help ensure safe, stable, and reliable operation.
8. Independent DC Power Supply
The instrument includes a dedicated DC power output unit with adjustable 110 V and 220 V DC outputs, providing convenient power supply options for relay testing and verification.
9. High Performance and Cost-Effectiveness
Developed by integrating advanced technologies from multiple engineering disciplines, the tester combines the performance and functionality of high-end testing equipment with the affordability of compact testing instruments. It offers an excellent balance of performance, versatility, reliability, and cost-effectiveness.The HY-702 Microcomputer Relay Protection Tester is a compact, next-generation relay testing device developed using advanced microelectronics technology. Designed based on user feedback and insights from similar products, it offers improved functionality, reliable performance, and an efficient testing experience.
The tester features an optimized heat dissipation structure, multiple reliable protection mechanisms, and a power soft-start function to ensure safe and stable operation. Its flexible combination output capabilities support a wide range of protection relay testing requirements. Additionally, it is equipped with a high-resolution 320 × 240 dot-matrix graphic LCD display, providing clear test results and convenient operation.
AC current output
| Accuracy | 0.2 |
| Phase current output ( RMS ) | 0~40A |
| 3-phase in parallel current output (RMS) | 0~120A |
| Phase current values allowed to work a long time (RMS) | 10A |
| Phase current max output power | 400VA |
| 3-phase in parallel current max output power | 900VA |
| 3-phase in parallel current max output allowable working time | 10s |
| Frequency range ( fundamental wave) | 20~1000Hz |
| Overtone order | 1~20 |
DC current output
| Accuracy | 0.5 |
| Current output | 0~±10A/phase, 0~±30A/3 phase in parallel |
| Max Output load voltage | 20V |
AC voltage output
| Accuracy | 0.2 |
| Phase voltage output ( RMS ) | 0~120V |
| Line voltage output ( RMS ) | 0~240V |
| Phase voltage / line voltage output power | 80VA/100VA |
| Frequency range ( fundamental wave) | 20~1000Hz |
| Overtone order | 1-20 |
DC voltage output
| Accuracy | 0.5 |
| Phase voltage output amplitude | 0~±160V |
| Line voltage output amplitude | 0~±320V |
| Phase voltage / line voltage output power | 70VA/140VA |
Switching value and time measurement
| Switching value input | 7 loops | Idle contact: 1~20mA,24V |
| Potential contact access:"0":0~ +6V;"1":+11V~+250V | ||
| Switching value output | 2 for | DC:220V/0.2AAC:220V/0.5A |
| Time measurement | Measurement range 0.1ms~9999s | Accuracy 0.1ms |