HYB-A3 is a high-precision and high-performance three-phase AC current transmitter in the B series of Heyi Electric. It is designed specifically for precise monitoring and control of three-phase currents in modern industrial power systems. It can accurately and reliably convert current signals in three-phase AC systems into unified standard analog or digital signals. It is a key sensing device for building power monitoring, energy efficiency management, and process control systems.
The HYB-A3 three-phase AC current transmitter adopts average rectification conversion technology to ensure high-precision measurement (accuracy level can be selected as 0.2% or 0.5%). It is suitable for three-phase three wire or three-phase four wire systems, with input currents covering multiple standard ranges, including 0~1Aac, 0~5Aac, 0~10Aac, 0~20Aac, etc., and can linearly convert it to standard 0~20mAdc, 4~20mAdc, 0~5VDC or 0~10Vdc outputs. The signal conversion process is fast (response time ≤ 400ms), and the output is stable (output ripple ≤ 0.5% of peak to peak value). The product design complies with strict industrial standards, and the shell is made of ABS flame-retardant material. The structure is sturdy (weighing about 300g), compact in size (120 (L) x 110 (W) x 75 (H) mm), and supports standard 35mm DIN rail installation or cabinet fixed installation, making integration convenient. Its built-in input, output, power supply, and chassis four port fully isolated design (insulation strength ≥ AC2kVrms/min, insulation resistance>100M Ω @ DC500V) can effectively suppress system common mode interference and transient voltage surge, ensuring the safety and stability of data acquisition. The product has excellent overload capacity, allowing for long-term overload of 2 times the rated value, and can withstand short-term impact of 10 times the rated value for up to 10 seconds in extreme situations. The working power supply supports a wide range of AC/DC 80V~270V input, with low power consumption (DC about 3W/AC about 4VA), a working temperature range of 0-50 ℃, and a storage temperature range of -20~70 ℃, meeting the long-term stable operation needs of harsh industrial environments such as power, petroleum, coal, metallurgy, and railway.
Main Features
1. Excellent core performance: high-precision measurement, accuracy level up to 0.2% (with 0.5% selection provided), fast response time ≤ 400ms, ensuring real-time perception of three-phase current changes by the monitoring system. 2. Industrial grade protection and durability: The shell is made of ABS fireproof material, which is lightweight and has a high protection level. It has excellent voltage resistance and isolation characteristics in electrical engineering, and can withstand insulation tests up to AC2kV/min, providing a system level safety barrier. 3. Strong electrical adaptability: Supports a current overload capacity of 2 times in the long term and 10 times in the short term, adapting to transient impacts such as motor start-up and short circuits. The four port fully isolated design completely cuts off the electrical connections between the input, output, power supply, and housing to prevent measurement errors and equipment damage caused by ground potential differences. Wide power input (AC/DC 80~270V) design, compatible with mainstream industrial power standards worldwide. 4. High application flexibility: Multiple standard current inputs and signal outputs are available (current/voltage analog signals) to meet the needs of different PLC, DCS, SCADA systems. The product design complies with the 35mm standard guide rail installation specifications and integrates quickly. 5. Safety and high reliability: Excellent resistance to electromagnetic interference (EMI) and long-term stability, supporting stable operation in harsh electromagnetic environments on industrial sites. 6. Professional design: The front panel provides PWR power indication, ZERO (zero point) and SPAN (full degree) fine adjustment potentiometers (warning: non professionals should not adjust), making it convenient for qualified engineers to perform fine calibration and verification on site.
Application Scenarios
The HYB-A3 series, as a key three-phase current sensing core, is indispensable in various high demand scenarios that require comprehensive monitoring and control of three-phase power systems due to its strong anti-interference, high isolation, and stable and reliable characteristics. 1. Industrial power monitoring and metering: Real time three-phase current monitoring of three-phase feeders, busbars, and high-power motor drives is achieved in distribution panels, switchgear, and main distribution rooms, providing accurate current signals for energy management systems (EMS) and monitoring and data acquisition (SCADA) systems. 2. Motor drive and load monitoring: widely used in load monitoring, overload protection, and fault diagnosis systems for three-phase AC motors such as pumps, fans, compressors, and conveyor belts. 3. Renewable energy generation: used in photovoltaic power plants and wind farms to monitor the output current of three-phase grid connected inverters, ensuring power generation efficiency and grid stability. 4. Industrial process automation: Variable frequency drive (VFD) systems and DC drive systems in industries such as petrochemicals, metallurgy, mining, and lifting machinery participate in closed-loop control as key current feedback units to achieve precise transmission and process control. 5. Railway and public transportation electrical system: Monitor the three-phase AC system current of traction substations, signal power sources, and station distribution to ensure power supply continuity and equipment safety. 6. Equipment and system protection: As the front-end sampling unit of relay protection and fault recording devices, it provides reliable current isolation and conversion signals. In the event of overcurrent or short circuit faults in the system, it provides accurate judgment basis for the protection device and triggers rapid cut-off or alarm. 7. Third party testing and measurement: It can be used as a high-precision current acquisition front-end, paired with professional power quality analyzers, power data recorders, etc., to complete equipment power consumption testing, energy efficiency auditing, and system performance evaluation.
