A new generation of energy-saving water supply equipment. It is mainly used for tower-less water supply in high-rise buildings, constant pressure water supply of fire-fighting deep well pumps and other places where the speed of water pumps is closed-loop regulated according to the demand of real-time water use conditions. The closed-loop control system is composed of well-known brand transducers, intelligent controllers, pressure sensors and pumps. Multi-pump control, stable pipe network pressure, improve water supply quality, reduce secondary pollution, energy-saving efficiency, can complete the unattended tower-free water supply automatic control system.
What are the requirements for the use of the air compressor control cabinet?
The supplier shall provide a set of control cabinet based on PLC for medium pressure air system of power station, which is installed in air compressor room. PLC shall adopt programmable logic controller with performance no less than S7-300 series. Air compressor maintenance shall include at least the following parts:
(1) maintenance of motor terminal phase of air compressor;
(2) Overload maintenance;
(3) Over-pressure maintenance of cylinders at all levels;
(4) Temperature maintenance of cylinders at all levels;
In the control cabinet, two air compressors are provided with an independent control panel. The control panel is equipped with air compressor motor startup controller, automatic air switch and other main circuit equipment, and PLC, red and green indicator "manual-switch-automatic" selection switch, button, signal lamp, power isolation transformer, relay, motor maintenance control circuit equipment, exhaust temperature meter, exhaust pressure, etc. Force gauge, oil pressure gauge, low oil pressure shutdown relay and electric heater. The automatic control installation should allow the air compressor to alternately operate as a "working" machine, and automatically start the air compressor when the pressure drops to a predetermined value. All pressure signals required for automatic control of air compressors shall be provided. Three auxiliary pressure signals should also be provided for low-pressure alarm, high-pressure alarm and high-pressure safe cut-off. The control cabinet shall at least provide the signal of high and low pressure of the gas storage tank and the operation status of two air compressors to the computer monitoring system.
The control system should have the functions of "local/remote" switching, manual/automatic switching, start-up, shutdown, air compressor operation mode switching, motor maintenance, air compressor parameter setting, various states and parameters appearing, fault alarm appearing, etc. It should also have the interface with LCU, which is the common equipment of power station computer monitoring system. The interface should include network communication interface and necessary I/O connection. Mouth. The supplier shall provide the communication protocol software and stop harmonizing with the contractor of the power plant computer monitoring system to ensure the success of communication. Input/output (I/O) contacts should be electrically independent empty contacts. Input signals mainly refer to remote control commands. Output signals mainly refer to the operation status of medium pressure gas system equipment and alarm information.
This article is from: Jinan Air Compressor more content please click: , we will provide you with a satisfactory service to ask questions, welcome your call!