The motor protection relay is a multifunctional protection relay designed for medium and large standard asynchronous motor protection. It is widely used in a variety of medium voltage motor equipment, such as pumps, fans, mills or crushers, and can provide comprehensive fault protection during motor start-up, operation, idling and stop cooling. It has become a leader in the field of motor protection with its comprehensive protection functions, high-precision measurement and monitoring, flexible communication interface, powerful fault recording function and easy-to-operate human-machine interface. Whether in power, petroleum, chemical or other industrial fields, this product can provide reliable protection for the safe operation of motors.

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　　REF620C_F Other names:

　　Microcomputer comprehensive protection REF620C_F

　　REF620C_F Feeder protection and control relay

　　Control relay REF620C_F

　　REF620C_F motor protection relay is a multifunctional protection relay designed for medium and large standard asynchronous motor protection. It is widely used in a variety of medium-voltage motor equipment, such as pumps, fans, mills or crushers, etc., and can provide comprehensive fault protection during motor start-up, operation, idling and stop cooling. With its comprehensive protection functions, high-precision measurement and monitoring, flexible communication interface, powerful fault recording function and easy-to-operate human-machine interface, it has become a leader in the field of motor protection. Whether in power, petroleum, chemical industry or other industrial fields, this product can provide reliable protection for the safe operation of motors.

　　Protection function

　　REF620C_F motor protection relay has a variety of protection functions, including but not limited to:

　　Motor thermal overload protection: Based on thermal stress calculation, it can monitor the temperature of the motor in real time and take corresponding protection measures.

　　Motor start monitoring: During the motor start process, it can monitor the starting current and start time of the motor to ensure the normal start of the motor.

　　Rotor blocking protection: When the motor has rotor blocking, it can quickly cut off the power supply to prevent motor damage.

　　Phase-to-phase overcurrent protection: It can detect the motor phase-to-phase overcurrent fault and take corresponding protection measures.

　　Low current protection: When the motor running current is lower than the set value, it can send an alarm signal.

　　Negative sequence protection: It can detect the negative sequence current of the motor to prevent the motor from being damaged by the negative sequence current.

　　Zero-sequence current protection: It can detect the zero-sequence current of the motor for ground fault protection.

　　Circuit breaker failure protection: When the circuit breaker fails, it can take corresponding protection measures to ensure the safety of the motor.

　　Main features

　　Comprehensive protection functions: It provides multiple protection functions such as motor thermal overload, motor start-up monitoring, rotor blocking, phase overcurrent, low current, negative sequence protection, zero-sequence current and circuit breaker failure protection.

　　High-precision measurement and monitoring: It supports thermal overload protection of thermistors input through the RTD module, and can accurately measure the temperature of the motor and take corresponding protection measures.

　　Flexible communication interface: It has two independent communication ports, supports RS-485 or optical fiber interface, and can support multiple communication protocols such as Modbus RTU/ASCII, IEC 60870-5-103 and SPA, which is convenient for data transmission and remote monitoring with the host computer or control system.

　　Powerful fault recording function: built-in fault recording module, which can fully record the fault status, including four analog input channels and up to eight user-selectable switch channels, with adjustable sampling rate and recording time of up to 80 seconds.

　　Easy-to-operate human-machine interface: with 2×16 character LCD display and directional navigation buttons, it supports multiple language display, and users can select password protection for the human-machine interface, which is easy and safe to operate.

　　Application field

　　The REF620C_F motor protection relay is not only suitable for the protection of motors, but also can be used to protect feeder cables and power transformers and other equipment that require thermal overload protection and single-phase, two-phase or three-phase overcurrent or non-directional ground fault protection. Its large number of digital input and output contacts allows a wide range of applications and can meet the protection needs of different occasions.

　　All products on this website are special products, and the market price has been fluctuating.

　　Specific quotation shall be subject to customer service, because the product is a new product, the price is not real,

　　Please confirm the model and product, price and other details with customer service before placing an order, the website has been used,

　　New ones are on sale, please contact customer service for communication.

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