Description
Key Technical Specifications
Combined with the general technical parameters of the REM543 series and the characteristics of this model, the core technical parameters are as followsABB Group:
| Parameter Name | Parameter Value |
|---|---|
| Core Protection Functions | It has short-circuit and earth-fault protection; also covers over-current, unbalanced load, over-temperature, over-voltage, under-voltage, under-impedance and other abnormal operating condition protection. It is also equipped with motor stall protection and cumulative start counter for start-up supervision. |
| Voltage Protection Performance | Three-phase under-voltage protection function; operating voltage range is 0.10 – 1.20× rated voltage, operating time is 0.1 – 300.0s, and operation accuracy is ±2.5% of the set value or ±0.01× rated voltage. |
| Current Protection Performance | Supports under-current/loss of load protection; operating current range is 0.10 – 0.99× rated current, operating time is 0.1 – 600.0s, and can be set to alarm or trip mode. |
| Communication Interface | Rear panel is equipped with SPA/LON bus communication interface; front panel has optical RS232 port, which can communicate with PC through CAP501 software. |
| Display & Operation | Equipped with a large front-panel LCD graphic display to display equipment status in real time and facilitate access to fault records and parameter settings. |
| Operating Environment | Refer to the series universal parameters, the operating temperature is usually -25°C to +55°C, which adapts to the harsh working conditions of industrial sites. |
| Installation Dimensions | Refer to the series size data, the overall dimensions are approximately 254mm×226mm×10mm (height × depth × width), and it adopts panel-mounted installation. |
Core Application & Problem SolvedABB Group
In industrial scenarios such as small and medium power plants and large industrial workshops, rotating machinery like generators and motors often face multiple operational risks. For example, generators may suffer from over-excitation or under-excitation due to grid fluctuations, and motors for pumps and mills are prone to stall or overload during start-up and long-term operation. Traditional single-function protection devices are difficult to fully cover these risks, and communication interference may lead to delayed protection actions.
The REM543CG214AAAA solves these pain points well. Its multi-functional integrated design integrates various protection functions required by rotating machinery, avoiding the cumbersome debugging and matching of multiple single-function devices. The optical communication method ensures that the device can conduct fast and interference-free data transmission in complex industrial electromagnetic environments. For instance, in a small hydropower plant, when the generator has an under-voltage fault due to unstable water flow, the device can accurately trigger the protection action within the set time according to the voltage parameter threshold, preventing the generator from being damaged due to long-term under-voltage operation. Meanwhile, its PLC programmable logic function can be customized according to the actual working conditions of the power plant, realizing linkage with switchgear and improving the automation level of the power generation system.
Installation & Maintenance Tips
- Standardize Communication Configuration: When connecting the front-panel optical RS232 port to a PC, use the dedicated CAP501 software for parameter setting and data reading. Avoid using non-special software to prevent communication failure or parameter confusion. When configuring the SPA/LON bus at the rear panel, ensure the bus wiring is neat and the terminal connections are firm to reduce signal attenuation.
- Accurately Calibrate Protection Parameters: Before commissioning, input the rated voltage, current, operating time and other parameters of the protected generator or motor according to the actual working conditions. For example, for the cumulative start counter of the motor, set the reasonable start-up time threshold and cumulative times limit according to the motor’s start-up characteristics, so as to avoid false alarms or missed protection caused by parameter mismatch.
- Regularly Check the Display and Fault Records: The front-panel LCD display can reflect the equipment operating status in real time. During daily inspection, pay attention to whether the voltage, current and other data are normal. Regularly export fault records through the communication port for analysis, which can predict potential failures of rotating machinery in advance.
- Pay Attention to Installation Environment Requirements: Avoid installing the device in a location with direct sunlight, heavy humidity or severe vibration. Although the device is adaptable to harsh environments, prolonged exposure to extreme conditions will reduce its service life. During installation, keep a certain heat dissipation space around the device to prevent overheating failure.
