Frequency counter

Frequency conversion cabinet, control cabinet

        product manual:

        The frequency conversion control cabinet is mainly used to adjust the working frequency of the equipment, reduce energy loss, and can start the equipment smoothly, and reduce the damage of the large current generated by the direct start of the equipment to the motor. At the same time, it has its own analog input (for speed control or feedback signal), PID control, pump switching control (for constant voltage), communication function, macro function (different parameter setting for different occasions), multi-speed, etc. . It can be widely applied to automatic control of various occasions such as water supply, drainage, fire protection, sprinkler pipe network pressurization and HVAC hot and cold water circulation in industrial and agricultural production and various types of buildings.

        Equipment overview:

        The frequency conversion control cabinet is a technician who fully absorbs the advanced experience of pump control at home and abroad. After years of production and application, it has been carefully designed and manufactured.

        Inverter control cabinet products have overload, short circuit, phase loss protection and pump body leakage, motor over temperature and leakage

        A variety of protection functions and a full range of status display, with single pump and multi-pump control mode, a variety of active and standby pump switching methods and various starting methods. It can be widely applied to automatic control of various occasions such as water supply, drainage, fire protection, sprinkler pipe network pressurization and HVAC hot and cold water circulation in industrial and agricultural production and various buildings.

        The inverter control cabinet has excellent quality, beautiful and durable appearance, convenient installation and operation, and is a safe and reliable companion for all kinds of pumps.

        Typical applications: constant pressure water supply, air compressors, fan pumps, central air conditioners, port machinery, machine tools, boilers, paper machinery, food machinery, etc.

        Control type

        1. Liquid level control: The control cabinet is equipped with a high-performance Key float switch, which automatically controls the opening and closing of the water supply and drainage pump according to the high and low changes of the liquid level.

        2. Pressure control: external electric contact pressure gauge or pressure controller can automatically open and close the pump according to the change of pipe network pressure. This type is widely used in domestic water supply and fire boosting system.

        3, temperature control: external temperature controller, according to the set temperature range to open the pump or shut down the pump, used in constant temperature, heat exchange systems and other occasions requiring temperature control.

        4. Time control: The chassis panel is equipped with a time setting button and a display. The user can control the opening and closing of the water pump according to the timing requirements, and is suitable for various timing or regular intermittent working mode control.

        Characteristic analysis

        1. Saving energy

        Compared with the traditionally controlled motor, the energy-saving of the inverter control motor is the most practical. The motor operating condition supplied according to the water injection volume and oil demand is economical operation, which can save 48.8%.

        2, the operating cost is reduced

        The operating cost of a traditional motor consists of three items: initial procurement cost, maintenance cost, and energy cost. The energy cost accounts for about 77% of the operating cost of the motor. By reducing energy costs by 44.3%, coupled with reduced impact on equipment after variable frequency start-up, maintenance and repair volumes are also reduced, so operating costs will be greatly reduced.

        3. Improve pressure control accuracy

        The variable frequency control system has precise pressure control capabilities. Match the pressure output of the motor to the amount of water required for the system. The output of the variable frequency control motor changes as the motor speed changes. Due to the improved accuracy of the variable frequency control motor speed, it can keep the system pressure variation of the pipe network within the range of 3 psig, that is, within 0.2 bar, effectively improving the quality of the working condition.

        4, extend the life of the motor

        The inverter starts the motor from 0HZ, and its starting acceleration time can be adjusted, thus reducing the impact on the electrical and mechanical components of the motor during starting, enhancing the reliability of the system and prolonging the service life of the motor. In addition, the variable frequency control can reduce the current fluctuation when the unit starts. This fluctuation current will affect the power consumption of the power grid and other equipment. The frequency converter can effectively reduce the peak value of the starting current to a minimum.

        5, low motor noise

        According to the working condition of the motor, after the frequency conversion speed regulation is installed, the running speed of the motor is obviously slowed down, so the noise during the running of the motor is effectively reduced.

        Features

        1. Power switching and protection function of frequency conversion control cabinet

        The inverter control cabinet is usually designed with a circuit breaker component, which is connected to the incoming power supply, which can help the inverter control cabinet to complete the circuit's on-off operation and provide protection when the circuit and the inverter are short-circuited or overloaded. In addition, the frequency conversion cabinet can also cut off the power supply during the maintenance of the motor to ensure the safety of the operator.

        2. Frequency conversion speed control function of frequency conversion control cabinet

        The control panel of the frequency conversion control cabinet is provided with a potentiometer for frequency conversion speed regulation, and can send a command signal to the motor according to the output frequency of the operator to control the rotation speed of the motor. Some products in the inverter control cabinet are equipped with a power frequency switching function to ensure that the motor is switched back to the commercial power supply through the automatic control loop when the inverter is faulty.

        3. Intuitive control function of frequency conversion control cabinet

        The cabinet of the inverter control cabinet is designed with display device and operation panel. It is connected with the electrical components inside the inverter control cabinet, which can visually display the operating status of the inverter control cabinet, and at the same time facilitate the operator to control the operation of the inverter device, and the motor. The device is operated on site.

        The cabinet of the inverter control cabinet is also equipped with various instruments and indicators, such as a voltmeter, an ammeter, a frequency meter, and a power indicator, an alarm indicator, a running indicator, a power frequency indicator, and the like. The operation and operation status of the inverter control cabinet can be directly reflected on various instruments and indicators to realize the time monitoring of the working status of the inverter.

        4. Safety protection function of frequency conversion control cabinet

        The frequency conversion control cabinet concentrates various electrical components including the inverter in the cabinet, which can reduce the influence of the external environment on the electrical components, reduce the degree of environmental pollution of the electrical components, and reduce the operation of the inverter control cabinet operator. The risk of electric shock is therefore a good safety protection effect.

        Technical Parameters

        1, frequency control cabinet. Direct start control cabinet

        Control motor power: 0.37-15KW;

        Control voltage: 380V;

        Control the number of pumps: 1-4 units.

        2, frequency control cabinet. Triangular start

        Control motor power: 15-90KW;

        Control voltage: 380V;

        Control the number of pumps: 1-5 units.

        3, frequency control cabinet. Automatic decompression start control cabinet

        Control motor power: 15-160KW;

        Control voltage: 380V;

        Control the number of pumps: 1-5 units.

        4, frequency control cabinet. Automatic frequency control cabinet

        Control motor power: 0.18-250KW; control voltage: 380V;

        Control the number of motors: 1-7 units;

        Pressure control accuracy: 0.02MPa or -0.02MPa