CM808 intelligent MCC control and protection management device is based on the research of similar foreign products and the summarization of a large number of typical domestic MCC electrical system design experiences by Ruian Gongtai Electric Co., Ltd., in order to adapt to the trend of intelligent secondary equipment terminals of electrical systems, and is aimed at MCC circuits. Design features a new generation of digital, strong anti-interference intelligent MCC control and protection management device.
The product is mainly used in the control circuit of low-voltage motors to realize various protection, monitoring and control functions of the motor, and can realize the remote monitoring of the motor circuit through the field bus.
The CM 808 intelligent MCC control and protection management device adopts a universal design concept, and on the basis of simplifying the primary circuit (eliminating the traditional thermal relay, thermal protector, undervoltage and overvoltage protector and other protectors; eliminating the time relay , Intermediate relays, auxiliary relays, current transformers, meters, transfer switches, indicator lights, programmable logic controllers and other secondary discrete components), complete the secondary loop control, protection, interlocking, measurement, signal, Communication and other functions greatly improve the design and production efficiency, reduce the user's on-site debugging and maintenance workload, shorten the project design and debugging cycle, and have obvious comprehensive benefits.
Functional characteristics
◆The auxiliary power supply supports DC110V/220V or AC220V.
◆Hardware system adopts distributed structure design, modularization, high degree of standardization, convenient installation, easy networking, and easy on-site maintenance.
◆All wiring adopts plug-and-pull plug connection mode, using high-reliability plug-ins, completely eliminating the hidden danger of poor contact.
◆Using a back-plug structure, the strong and weak currents are completely separated, which can greatly reduce the coupling of external electromagnetic interference on the weak current side, enhance the anti-interference ability of the device, and improve its reliability and safety.
◆Use Profibus DP-V1 redundant communication mode.
◆Using 32-bit industrial-grade microprocessor, fast speed and high precision.
◆AC sampling uses true effective value (RMS) algorithm to fully reflect the impact of harmonic currents.
◆Adaptive frequency conversion sampling technology, suitable for inverter circuits.
◆Multiple flexible control methods, each control authority is mutually locked.
◆The device is miniaturized design, and the installation method is flexible.
◆Full metal shell design, effectively shielding external electromagnetic interference.
◆Chinese character LCD, rich menu display, friendly interface.
◆12-channel switch input circuit, driven by internal DC24V power supply, long transmission distance, high reliability and safety.
◆The internal control contact of the device is equipped with a protection circuit, which can effectively protect the contact without an external surge absorber.
◆With a self-memory chip inside the device, it can realize the "anti-shake" function and the voltage recovery self-starting function without the need for a separate power supply module.
◆Solved the shortcoming that the thermal relay and MCCB overload part cannot simulate the electrical and thermal characteristics of the MCCB load. On the basis of saving the thermal relay and simplifying the MCCB structure, it can better protect the electrical equipment.
◆Solved the problem of insufficient sensitivity of MCCB instantaneous release to single-phase grounding protection of the long-distance power supply motor.
Perfect overload protection. The thermal model considers the comprehensive thermal effects of the positive and negative sequence currents of the motor, and accurately simulates the heating and cooling processes of the motor through the heating constant and the heat dissipation constant.
◆Abundant programmable logic can realize complex process interlocking (such as interlocking between motors, interlocking between motors and liquid level, temperature and other physical quantities), which improves design efficiency.
◆Built-in photoelectrically isolated 4-20mA output interface, output power is optional, and the range is adjustable.
◆Using industrial fieldbus technology (Profibus-DP/ModBus-RTU), it can quickly communicate with the monitoring system and PLC and realize the remote advanced management function.
◆Dual communication interface design can realize network redundancy, greatly improve the reliability of communication, and the networking mode is flexible.
◆Powerful statistical management and analysis functions (event record, management record), convenient for users to grasp the running status of the motor in real time.

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