Phase loss Three Phase Voltage Monitoring Relay protection against improper phase sequence

Phase loss Three Phase Voltage Monitoring Relay protection against improper phase sequence

Phase loss protectors, also known as motor phase failure protectors or power phase loss protectors, are commonly used on three-phase motor circuits. If a single circuit is missing, the motor torque will decrease and the rotor speed will drop, resulting in two other currents Increase, burn the motor winding, its principle is through different means, carries on the monitoring to the three-phase electricity, if has the disconnection situation, will automatically cut off the power source, avoids burns the winding, because the science and technology develops rapidly, the type of phase failure protection device, has passed To monitor the on-off of each voltage control, there are monitoring of each current to control.

Detect voltage to control
This type of detection voltage can also be called three-phase power supply monitor, phase sequence protector, over voltage protection device, etc.) Mainly used for AC 50/60Hz, rated voltage below 460V, industrial three-phase 220V, 380V, 440V , 460V and other voltage levels of various fault detection, the three-phase input power supply voltage is too high, voltage is too low, lack of phase, phase failure, reverse phase (phase sequence), three-phase voltage imbalance, etc. to provide protection relay products Widely used in distribution boxes, central air-conditioning units, electric control boxes, power distribution cabinets, cranes, etc., such as central air-conditioning compressor protection, power monitoring of various elevators, pumps, oil pumps against phase loss, reverse phase protection, etc. An indispensable protective product that maintains the normal working voltage of the equipment during operation.

Phase sequence protector is a kind of control relay, automatic phase sequence identification protection relay, guarantee some special electromechanical equipment

The reversed phase sequence of the power supply reversed the accident or equipment damage. Such as elevators, central air conditioning, cranes, motors, etc. If the phase sequence of the power supply is wrong after repair, it will lead to accidents. The phase sequence protector must be connected to the control circuit to ensure the phase sequence is correct. Air-conditioner compressors also use phase sequence protectors to ensure that the compressor will not be reversed after maintenance.

Sampling three-phase power supply and processing, in the case of phase sequence of the power supply phase sequence and protector terminal input, the output relay is turned on, the device main control circuit is connected. The existing two types of products are: when the phase sequence of the power supply changes, the phase sequence does not match, and the output relay cannot be turned on, thereby protecting the equipment and avoiding the occurrence of accidents; the other type uses digital micro-core technology products and can realize automatic Phase sequence recognition, and automatic phase sequence conversion, to ensure that the motor rotates in a constant phase sequence.

♦ Technical data

GINRI POWER AUTOMATION CO.,LTD. is a professional production voltage phase sequence protection device (and name: three-phase power monitor), and PLC output zoom Board, and smart type motor integrated protection device, and industrial parts manufacturers, technology development team in elevator industry, and refrigeration industry, and crane industry, environmental equipment, mechanical NC industry and the industrial following insurance industry, field has more than 10 years practice experience, has development out variety price economic and function excellent of products. CQC product quality system by China Quality Centre (3C) certification and CE certification, products in the manufacturing process in strict accordance with the ISO9001 quality assurance system requirements and professional technical and service support.

Voltage phase-sequence protection for many years (equipment, refrigeration equipment, crane (passenger and goods) elevators, control of DC power supply system (Cabinet) screens, precision air conditioners, room air conditioners, electric hoist, boiler equipment, laser equipment, parking equipment, cranes, compressors) and so on using the run.

PLC output amplifiers (environmental protection equipment, numerical control and automation equipment, automobile, plastic machinery, hydraulic machinery, ceramic foam machinery, woodworking machinery, machinery) and so on using the run.

Years of integrated Intelligent motor protector (power plants, paper mills, steel mills, aluminium plants, cement plants, sewage treatment plants, coal preparation plants, refineries, petrochemical plants), and so on using the run.

Product quality is stable and safe, reliable, and earned a solid market position in the market and a high reputation in the industry, received unanimous recognition and praise of our customers.

Ginri company always adhere to "scientific management as the core, the user needs for the Centre to focus on product quality, meticulous service is sincere," the spirit of enterprise, please call us from all walks of life, thank you!