The design of automation of the pumping station of the warehouse complex

Completed the automation project design of the  pumping warehouse complex in the Moscow region.

DESIGNING PUMP AUTOMATION

1. Baseline data and the main provisions of the project automation

 The project of automation of engineering systems is carried out on the basis of the following documents:

- contract for the design of automation systems and scheduling engineering systems;

- technical specifications of adjacent sections;

- technological and construction drawings;

- current regulatory documents:

Considering the main purpose of the building, the project provides for the possibility of further expanding the network for dispatching and automation of engineering equipment. Additional control and monitoring panels with the necessary equipment may be located in the technical premises of the complex as the need arises to automate new systems.

 This project includes:

- automation of pumping systems;

Structurally, the automation system is a network of control, freely programmable controllers installed in the boards (together with the power unit) at the place of installation of this or that equipment.

The connection between controllers and external devices (drives, sensors) is carried out with the help of shielded cables, such as MKESH 2x1.0, 3x1.0, 4x1.0, the shields of which are properly grounded to avoid induced currents. The cabling of the automation system is carried out in separate metal trays, at a distance of at least 200 mm. from power wiring, and from trays of aggregates in a metal corrugated pipe, with a diameter of 16, 20, mm. In addition to remote and automatic control of units, provides for "local" control, directly from the control panel; in addition, at the place of installation, the units that are remote from the shield (pumps,  

2. Basic automation solutions using Honeywell equipment .

2.1 To solve the problems of automating the pumping system, the project uses a complex of Honeywell tools .

                   The complex includes:

- primary converters with unified output signal 0 ... 10V

(air temperature sensor, water (liquid) temperature sensors;

- differential pressure sensors with discrete output signal;

- drives of water valves and air dampers;

- freely programmable, multifunctional microprocessor controllers EXCEL 500;

- the device of communication of the personal computer with controllers - BNA ;

2.2 The installation of electrical panels with controllers built into them is provided in the Pumping room.                 

2.3 Systems management provides 3 modes:

- Local control of pump motors from control panels.

- Remote control (from the CDP premises)

- Automatic systems management.

2.4 Automatic control is carried out according to a predetermined program embedded in the controller.               

2.5 In order to transfer the unit or the entire system to local control mode,

you need the appropriate switch or all switches on the shield

control set to “On” 

Local control mode should be used only when debugging systems and in case of emergency.

2.6 Automatic control panel with EXCEL 500 controllers provides:

- start in work in a certain combination and sequence all units of the system;

- implementation of the necessary laws of regulation and management, blocking dependencies;

- the inclusion of a backup pump motor when a worker fails;

- measurement of current parameters and transfer of their values to the CPD;

- control of the state of the equipment (enabled / disabled, accident);

- remote on / off systems from the CPD;

- transfer to the CPD of emergency and statistical information about current technological processes.

3. Solutions for the automation of pumping systems.

3.1. For the solution of problems of automation of Pumping, the complex of means with use of the combined electroboard of management and automatic equipment is provided. The complex includes:

     - electrical control panels and automation with built-in controllers, located at the place of installation of the equipment they serve. The power supply characteristics of the switchboard are:

~ 380 V, 50 Hz, according to the 2nd category of power supply reliability,

- bus information exchange between controllers ( C - BUS ), physically representing a two-wire communication line.         

3.2 Automation of pumping systems includes:

- Fire pump control (on / off) from the dispatcher's workplace or automatically from a fire signal and low water pressure in a fire pipe. 

- Control of the drainage pump (on / off) from the workplace dispatcher or automatically from the signal float in the drain pit.

In the control panel WBB provides for the connection of an external signal from the PPP. 

3.3 Dispatching systems Pumping provides:

- obtaining information (graphically on the CDP monitor) about  

    pressure on the circuits of the pumps;

- obtaining information about the arrival of a fire signal to the shield 

   control from the fire alarm station (hereinafter PPP);

- obtaining other statistical, preventive and emergency information.

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