المقاولين,قاطع الدائرة,العاكس للطاقة الشمسية,عداد كهرباء,البطاريات الشمسية
As a three-phase overand under-voltage + phase sequence control relay, it is mainly used to protect industrial three-phase equipment against power grid faults such as abnormal voltage, phase sequence error, and phase loss.
Suitable for 380V three-phase systems, it features digital parameter adjustment and fast response, and is widely applied in the following scenarios:
- Motor and Pump Protection
Protect three-phase asynchronous motors, الضواغط, مضخات المياه, المشجعين, الكسارات, الناقلات, إلخ., from winding burnout caused by over/under-voltage, and reverse rotation or mechanical damage due to phase sequence error.
Suitable for medium and high-power motors of 7.5kW and above, especially in mining, علم المعادن, and building materials sites with large power grid fluctuations.
- Automated Production Lines and Precision Equipment
Protect key equipment such as CNC machine tools, robot workstations, PLC control systems, assembly lines, and packaging machines from shutdown, scrap, or process deviation caused by abnormal voltage.
Used with servo drives and inverters to improve system stability and reduce defective batches.
- Building and Public Facility Electrical Systems
Ensure reliable power supply for central air conditioning, مصاعد, fire pump rooms, and water supply/drainage systems in buildings, preventing start failure due to under-voltage or over-voltage shocks.
Provide graded protection for power distribution cabinets and power circuits in shopping malls, المستشفيات, ومراكز البيانات.
- Renewable Energy and Grid-Connected Equipment
Protect grid-connected devices such as PV inverters, wind power converters, and energy storage converters against unstable new energy output and voltage fluctuations.
- Petrochemical and Special Working Conditions
Protect auxiliary equipment (pump sets, المشجعين, heating furnaces, إلخ.) in oil refineries and chemical plants. Its wide temperature range (-10℃ ~ +55℃) adapts to harsh environments and avoids process shutdowns caused by abnormal voltage.
- Non-Standard Equipment and Custom Control Cabinets
Provide standardized and highly reliable power inlet protection for complete sets of automated equipment, test devices, and special machinery (injection molding machines, printing machines, إلخ.).
Replace equivalent products such as Siemens 3UG4632, Schneider RM22TG20, and ABB CM-PVS.41S for quick adaptation to existing projects.
Key Points for Selection and Replacement
- Function matching: Must cover over-voltage, under-voltage, and phase sequence protection to avoid missing functions.
- Consistent parameters: Over-voltage adjustable 400–460V, under-voltage adjustable 230–360V, response time 0.1–10s, matching the original system.
- Contacts and power supply: 5A/250V AC contacts, three-phase 380V supply (without neutral wire), matching the load and power source.
- Installation compatibility: DIN-rail or panel mounting, keeping the same layout inside the cabinet.
