ABB REM610C55HCNN02 motor protection relay



ABB REM610C55HCNN02 motor protection relay

Relay Overview

ABB REM610C55HCNN02 motor protection relay is a high-performance intelligent protection device launched by ABB, designed specifically for the full life cycle protection and monitoring of medium and high voltage motors. As the core protection unit of the motor control system, its core function is to real-time collect motor operating parameters, accurately identify fault types such as overcurrent, overload, phase loss, grounding, etc., and quickly trigger protection actions when faults occur, cut off motor power or issue alarm signals, minimize damage to motor windings and insulation structures caused by faults, and provide comprehensive operating data and fault analysis basis for operation and maintenance personnel.

This relay integrates microprocessor technology and digital communication functions, not only possessing the reliability of traditional protection devices, but also adding flexible parameter configuration, remote monitoring, and data recording capabilities. It is widely compatible with high-voltage motor control systems in industries such as power, petrochemicals, metallurgy, and cement, and can seamlessly integrate with mainstream PLC and SCADA systems such as ABB AC800M and S7-400, providing comprehensive safety guarantees for motor operation.

Core functions and advantages

2.1 Comprehensive fault protection capability

REM610C55HCNN02 relay integrates more than ten protection functions based on the physical characteristics and fault mechanisms of motor operation, covering the safety requirements of the entire process of motor start-up, operation, and shutdown:

-Overload protection: Adopting inverse time protection curve (in accordance with IEC 60255 standard), the protection action time can be automatically adjusted according to the rated current and overload multiple of the motor, avoiding winding overheating and burnout caused by long-term overload of the motor. It supports self definition of multiple protection curves such as light load, standard load, and heavy load.

-Short circuit protection: It has the functions of instantaneous short circuit and delayed short circuit protection. Instantaneous protection can quickly act (action time ≤ 50ms) for severe short circuit faults (current ≥ 10 times rated current), while delayed protection is used to distinguish between short circuit and starting impulse current, avoiding misoperation. The protection setting value can be accurate to 0.1 times rated current.

-Phase loss/imbalance protection: Real time monitoring of the amplitude and phase difference of three-phase currents. When a phase current is missing or the imbalance degree of three-phase currents exceeds the set threshold (default 15%, adjustable), an alarm or protection action is immediately triggered to prevent the motor from generating negative sequence magnetic fields due to phase loss operation, which can cause vibration intensification and winding damage.

-Grounding protection: Supports two types of grounding protection modes: zero sequence current type and residual current type, suitable for different grounding systems (IT system, TT system), can accurately detect grounding faults caused by insulation damage of motor windings, with a protection setting range of 0.1A-10A, meeting the needs of different power motors.

-Other features of protection include stalling protection (monitoring motor start-up timeout or speed drop during operation), overvoltage/undervoltage protection (preventing abnormal voltage from causing motor insulation breakdown or insufficient torque), PTC thermistor protection (directly connecting motor winding temperature measuring elements to achieve direct temperature protection), and other functions.

2.2 High precision parameter measurement and data recording

The relay is equipped with a high-precision data acquisition unit, which uses a 16 bit ADC conversion chip and digital signal processing technology to achieve precise measurement and real-time monitoring of motor operating parameters

-It can measure electrical parameters such as three-phase current, three-phase voltage, power factor, active power, reactive power, and electrical energy. The current measurement accuracy is ± 0.2%, and the voltage measurement accuracy is ± 0.5%, meeting the requirements of metrological monitoring.

-Equipped with event recording and fault waveform recording functions, it can store the latest 500 event records (including protection actions, parameter limit violations, communication anomalies, etc.) and 10 sets of fault waveform data (waveform length can be set, including waveform data 2 seconds before the fault, 1 second during the fault, and 2 seconds after the fault), with an event recording resolution of 1ms, providing accurate data support for fault tracing.

-Support real-time data refresh and historical data query. The motor operation trend curve (such as current trend and temperature trend) can be retrieved at any time through the local operation panel or remote monitoring system, making it easy for operation and maintenance personnel to analyze the motor operation status and predict potential faults in advance.

2.3 Flexible communication and remote control capabilities

Relays are equipped with multiple types of communication interfaces and support multiple industrial communication protocols, achieving seamless integration and remote operation and maintenance with higher-level control systems

-Standard RS485 and Ethernet interface, supporting mainstream communication protocols such as Modbus RTU, IEC 61850, Profibus DP, etc. Ethernet communication speed can reach 100Mbps, meeting real-time monitoring and data transmission requirements.

-Through the IEC 61850 protocol, intelligent substation automation systems can be connected to achieve standardized uploading of protection information and reliable issuance of remote control commands. It supports the "four remote" functions (telemetry, remote signaling, remote control, and remote adjustment), reducing on-site operation and maintenance workload.

-Support communication redundancy configuration, automatically switching to the backup communication link when the main communication link fails, ensuring communication continuity and avoiding monitoring failure caused by communication interruption.

2.4 High reliability and convenient operation and maintenance design

In response to the complex operating environment and maintenance requirements of industrial sites, relays have emphasized reliability and ease of use in hardware and software design

-The hardware adopts industrial grade components and modular design. The power module supports wide voltage input (85V AC-265V AC or 110V DC-220V DC), with overvoltage and overcurrent protection functions. The working temperature range is -25 ℃ -70 ℃, suitable for harsh environments such as high and low temperatures.

-Equipped with comprehensive self checking function, it can monitor the operation status of the internal power supply, CPU, I/O interface, and communication module of the relay in real time. When a hardware failure occurs, it will immediately issue an alarm signal, making it easy to quickly locate the problem.

-Equipped with a 3.5-inch Chinese LCD operation panel and buttons, supporting parameter localization settings, data query, and protection action testing, the operation interface is intuitive and easy to understand; Simultaneously supporting remote parameter configuration, firmware upgrade, and data management through ABB PCM600 configuration software to enhance operational efficiency.

Key technical parameters

Power parameters

input voltage

AC 85V-265V or DC 110V-220V

power consumption

Normal operation ≤ 15W, protection action ≤ 20W

current measurement

input method

Connected through current transformer (standard ratio 5A/1A optional)

measurement range

0-10 times rated current (continuous measurement), 0-20 times rated current (short-term measurement, ≤ 10s)

measurement accuracy

± 0.2% (within the rated current range)

voltage measurement

measurement range

0-120% rated voltage (line voltage)

measurement accuracy

± 0.5% (within the rated voltage range)

protection function

Action response time

Short circuit protection ≤ 50ms, other protections ≤ 100ms

Protection setting range

Overload protection: 0.5-10 times rated current; Grounding protection: 0.1A-10A

communication interface

interface type

1 RS485, 2 RJ45 Ethernet

Supported Protocols

Modbus RTU、IEC 61850、Profibus DP

environmental parameters

Operating Temperature

-25℃ - 70℃

Storage temperature

-40 ℃ -85 ℃, relative humidity ≤ 95% (no condensation)

physical properties

Installation method

Panel installation (standard 3U size), protection level IP54

Applicable scenarios

REM610C55HCNN02 motor protection relay, with its comprehensive protection function, high-precision measurement capability, and flexible communication characteristics, is suitable for various protection and monitoring scenarios of medium and high voltage motors. Typical applications include:

1. Power industry: Used for the protection of auxiliary motors such as induced draft fans, supply fans, and feed pumps in thermal power plants and hydropower stations. These motors are key equipment of the unit, and their operational stability directly affects the power generation efficiency of the unit. Relays can effectively avoid unit shutdown caused by motor failures.

2. Petrochemical industry: Suitable for reaction kettle stirring motors, oil pipeline pump motors, etc. in refineries and chemical plants. In flammable and explosive production environments, the rapid protection action of relays can prevent safety accidents caused by motor failures. At the same time, its explosion-proof shell design (optional) can adapt to the needs of hazardous areas.

3. Metallurgical industry: Used for heavy-duty motors such as blast furnace fans, converter tilting motors, and rolling mill motors in steel plants. These motors have large starting currents and frequent load fluctuations. The overload protection and locked rotor protection functions of relays can effectively cope with complex working conditions and extend the service life of motors.

4. Cement industry: Suitable for rotary kiln drive motors, raw material grinding motors, etc. in cement production lines. In dusty and high vibration production environments, the high protection level and anti-interference ability of relays can ensure the reliable implementation of protection functions, avoiding production line interruptions caused by motor failures.

5. Municipal engineering: Used for the motors of sewage pumps, sludge dewatering machines, and water supply pumps in sewage treatment plants. The remote monitoring function of relays can realize the motor management of unmanned pumping stations and reduce operation and maintenance costs.

Precautions for use

-Installation specifications: Relays should be installed in ventilated, dry, dust-free, and non corrosive control rooms or distribution cabinets, avoiding close installation with strong electromagnetic interference equipment (such as frequency converters) (spacing ≥ 1m); During installation, it is necessary to ensure that it is firmly fixed to prevent vibration from causing loose wiring or component damage.

-Wiring requirements: Open circuit is strictly prohibited on the secondary side of the current transformer. When wiring, it is necessary to ensure that the transformer ratio is consistent with the relay parameter settings; Voltage circuit wiring should distinguish between phase and neutral wires to avoid misconnection and abnormal voltage; The control circuit wiring should use flame-retardant cables, and the cross-sectional area of the wires should meet the current carrying requirements (≥ 1.5mm ²).

-Parameter configuration: The protection setting should be strictly based on the rated parameters of the motor (rated current, rated voltage, starting time, etc.) and the on-site working conditions. The overload protection curve should be selected according to the load characteristics of the motor (light load/heavy load) to avoid protection failure caused by excessive protection setting or misoperation caused by insufficient setting.

-Calibration and maintenance: It is recommended to calibrate the parameters of the relay every six months and verify the accuracy of current and voltage measurement through a standard signal source; Regularly clean the operation panel and ventilation openings, check if the wiring terminals are loose, and ensure that the relay is in good working condition; After the fault action, it is necessary to promptly check the event records, analyze the cause of the fault, and then resume operation.

-Communication configuration: When configuring communication parameters, it is necessary to ensure that the relay IP address, subnet mask, and higher-level control system are in the same network segment, and the communication protocol is consistent; When using the IEC 61850 protocol, it is necessary to complete the ICD file import and dataset configuration to ensure the normal transmission of protection information and monitoring data.