Sales Miss Europe: 159-7414-3465 Online Q: 1922601218 Inquiry shipping ohhh) box a negative pressure water equipment, medium / high voltage box no negative pressure water equipment is widely used in thermal power generation, mining, metallurgy, petrochemical , powered sewage treatment, cement manufacturing, paper and pharmaceutical industries; it consists of a control cabinet, cabinet unit, transformer cabinet composed of three parts, along with a power frequency / frequency bypass switch cabinet for users to choose. Master cabinet installed the system controller and low-voltage electrical control, positive control cabinet installation of Windows HCI controller; unit mounted inside the power unit; transformer installed inside the main transformer, cabinet front mounting temperature control instrument and observation window; bypass switch cabinet mounted high voltage vacuum circuit breaker or isolator switch, realized through a combination of power frequency / variable frequency operation mode of manual or automatic switching. 2, box no negative pressure water supply equipment function (1) Box negative pressure water equipment management in order to ensure the security of user data and operations, the factory established a unified rights management. When you modify or inspect high-voltage inverter operating parameters, the first to carry out identification, check user permissions to prevent unauthorized operation, avoid high-voltage inverter system instability due to human factors bring reason. (2) Box no negative pressure water equipment control mode setting local control: direct use start control cabinet HMI, acceleration, deceleration, reset, stop, etc. buttons to achieve operation of the inverter. PC Control: Control system CPU board has communication interface, the user can refer to PC control mode as needed to the data communication and can be monitored on the drive the machine control all operations. Remote control: by remote control equipment, switching and analog given, through the terminal, I / O interface input command and setpoint. DCS control: flexible, programmable digital and analog communications interface for direct connection to the DCS, to achieve the perfect combination of on-site process control system, and achieve control through on-site process control system. 3. Box no negative pressure water equipment parameter setting functions for all parameter values ??have been set at the factory and can be modified according to site conditions. If the error to restore the factory settings. Skip frequency can be set on the minimum, maximum, and the lower limit, effectively avoid potential non-resonant frequency operation when the user's system. For different site conditions, you can set two kinds of V / F curve to achieve different torque boost, suitable for different loads. According to different load conditions, set different PID tuning parameters to achieve better feedback and better control of energy-saving effect. It is reasonable to set the drive frequency rise and fall times, the motor overcurrent, overvoltage protection factor and other parameters, the implementation of effective protection for the motor. (4) Box no negative pressure water equipment operation mode setting closed loop operation mode: In the closed-loop operation mode, the user can adjust the amount charged (the amount of wind, pressure, temperature, etc.) expectations by PID, will be established according to the user expectations, automatically adjust the output frequency to control motor speed, is charged with the amount of the actual value of the automatic approach expectations. Open-loop operation: Taking into account site conditions and some have not closed loop monitoring node, you can choose to run open-loop mode, run entirely by the operating platform or external analog signal directly given. (5) Box no negative pressure water equipment is set to start normal startup mode: normal mode after start up automatically at a frequency set by the user frequency and stable operation. Soft Start: soft start mode and press start, directly increases the speed to the grid switching frequency of the system parameters provided, then the system for "frequency / frequency switching" command, and the corresponding electric chain of control, to the effect of the soft-start . (6) Box no negative pressure water equipment waveform display function in the use of man-machine interface main interface, users can "curve" Record window for voltage output of the inverter input current waveform to a preliminary understanding of high-voltage inverter in the past or present working conditions. (7) Box no negative pressure water equipment failure query function with fault location and query capabilities, high-voltage inverter provides light when a fault on the main interface alarm message, not only to provide high-voltage inverter alarm bell when there is a serious failure and Audiovisual issue. On the main interface of the high-voltage inverter control cabinet man-machine interface, the user can "alarm record" can check the fault history. (8) Box no negative pressure water equipment bypass function if K1, K2, K3 uses SPST isolation switch, the user can manually bypass operation. K1, K2 is closed, the K3 is disconnected, the motor speed can be controlled operation. K1, K2 off, when K3 is closed, and start and stop the motor can be protected directly KM, out of the loop electrical work, this is the direct frequency bypass capability, ease of maintenance and repair. If K1, K2, K3 are using electric switch, you can implement a mechanical interlock between the three, automatic bypass and soft-start operation. Sales Miss Europe: 159-7414-3465 Online Q: 1922601218 Inquiry shipping ohhh) Address: Yuhua District, Italy all the way to the modern business center Red Block B B4062 Address: Industrial Park, Changsha Hanson long 沙黎托 water, allowing you to No water worries!