Core Functions: Monitors only for incorrect phase sequence and phase loss in three-phase power; does not detect over-voltage or under-voltage conditions.
Terminal Definitions
L1/L2/L3: Connect directly to three-phase 380V power supply;
11/12/14: Fault output contacts.
Practical Functions
1. Reverse Rotation Prevention: If the three-phase lines are connected incorrectly (wrong phase sequence), the relay contacts open and the motor cannot start, preventing equipment damage caused by the reverse rotation of fans or air compressors.
2. Phase Loss Protection: If one of the three live wires is disconnected, the control circuit is immediately cut off, preventing the motor from overheating and burning out due to phase loss.
Typical Applications: Fans, chiller units, and standard three-phase water pumps.
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Applications:
Motor Control Systems
Three-phase motor start/stop operations
Motor reversing circuits
Pump and compressor motor management
Conveyor and industrial machine tool control
HVAC Systems
Air conditioner compressor switching
Heating system power regulation
Ventilation fan control
Chiller system and air handling unit management
Industrial Automation
Production line power distribution
Machine automation integration
Process control system coordination
Robotic and assembly line power management
Power Distribution Networks
Commercial and industrial lighting control
Transformer load regulation
Capacitor bank management and power factor correction
Switchgear and panel operations
Special Applications
Crane and hoist control systems
Elevator and escalator power management
Welding equipment operation
Data center power distribution
Renewable energy system integration
 |
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Applications:
Motor Control Systems
Three-phase motor start/stop operations
Motor reversing circuits
Pump and compressor motor management
Conveyor and industrial machine tool control
HVAC Systems
Air conditioner compressor switching
Heating system power regulation
Ventilation fan control
Chiller system and air handling unit management
Industrial Automation
Production line power distribution
Machine automation integration
Process control system coordination
Robotic and assembly line power management
Power Distribution Networks
Commercial and industrial lighting control
Transformer load regulation
Capacitor bank management and power factor correction
Switchgear and panel operations
Special Applications
Crane and hoist control systems
Elevator and escalator power management
Welding equipment operation
Data center power distribution
Renewable energy system integration
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Zhejiang Mingtuo Electrical Technology Co., Ltd. is a technology-driven enterprise specializing in the research, development, and manufacturing of low-voltage and medium-voltage circuit breakers. Low Voltage Air Circuit Breaker Suppliers. Leveraging Liushi’s comprehensive electrical industry chain and local advantages, we provide reliable and safe electrical protection products along with customized solutions for global industrial, commercial, and residential power distribution systems. We are committed to becoming a trusted electrical protection partner for global customers through professional engineering capabilities, consistent manufacturing quality, and flexible customization services.
Recently, Zhejiang Mingtuo Electrical Technology Co., Ltd. successfully reached an important cooperation agreement with a Nigerian client, marking a further expansion of
Zhejiang Mingtuo Electrical Technology Co., Ltd. welcomed a group of clients from the Democratic Republic of Congo (DRC) in Africa for
Amid the global cross-border e-commerce “New Trade Festival” in full swing this March, Mingtuo Electric has officially launched its “March
Our goal is to help people in the best way possible. this is a basic principle in every case and cause for success. contact us today for a free consultation.Â
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