What is the principle behind the current indication alarm interlock? Is the interlock diagram I’ve drawn here correct?

Current indication alarm interlock is a protection mechanism in power systems. Its basic principle is to monitor the current in the circuit; when the current exceeds the preset safe range, an alarm is triggered or a power-off interlock action is carried out. Specifically, the current indication and alarm interlock usually includes the following components: 1. Measurement device: Devices such as current transformers (CTs) are used to monitor the actual current value in the circuit. 2. Control unit: Compares the measured current with a preset safe current threshold. 3. Alarm device: When the current exceeds the safety threshold, the control unit activates an alarm device (such as a buzzer or light signal) to alert the operator or the system. 4. Interlock device: If the abnormal current persists or reaches a higher risk level, the control unit will command the interlock device to take action, such as shutting off circuit breakers or contactors in order to break the current path and protect the circuits and equipment from damage. Under normal circumstances, the interlock diagram should clearly indicate the following: – The points where current is measured and the locations where current transformers are installed. - The logical processing method of the control unit, how to compare currents, and determine when to trigger an alarm or interlock. - The connection relationship of the alarm and interlock devices, including their signal lines to the control unit. - Emergency manual operation procedures, so that in the event of a failure of the automatic system, emergencies can be handled manually. If you are new to this field, it is recommended that you discuss the details of the interlocking diagrams with more experienced colleagues or mentors, and review the drawings in accordance with the standards and regulations applied in actual operations. Safety standards in electrical engineering are extremely important; therefore, it is essential to ensure that the design of interlock systems adheres strictly to relevant regulations and best practices. .

What software is used to create chain diagrams?

It’s CAD; this is just the construction drawings.

The interlock should be drawn on your motor; it’s used to monitor the motor current.:)