The significance of the motor current signal entering the DCS
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Generally, signals such as the operating status of motors, start/stop signals, and the speed of variable-frequency motors are fed into the DCS system, where they carry intuitive meanings. But what is the meaning of motor current, which is transmitted to the DCS from the electrical engineering department? Is there a clear meaning related to monitoring? Is it necessary?
Monitor the motor’s operation in real time to prevent long-term overloading
With comprehensive protection in place for electrical systems, long-term overloading is impossible. Based on this, can it be understood that an additional layer of monitoring is being added to the process engineering field?
The motor current can reflect the load condition of the motor
Some don’t have a rotation speed. Then use current to observe the load. It’s the process that determines whether it makes sense or not. If they need to monitor the current, you have to connect it.
It is to enable the process to monitor the pump’s operating status in real time
I can choose not to look, but I can’t do without it
Current is the most straightforward indicator to determine whether the operating load and the motor’s operating condition are normal, especially for motors with high power
Stay informed in real time about the pump’s operating status, and prevent overheating of the motor due to excessive current when adjusting the pump’s outlet flow, which could otherwise cause the pump to stop operating.
Medium-voltage and high-voltage motors generally have current indicators incorporated as needed, while low-voltage motor current signals are usually not fed into the DCS
Current is an intuitive indicator of the operating load and power of a motor. Nowadays, most motors are equipped with current indicators; these are required for low-voltage motors, and absolutely necessary for medium- and high-voltage motors.