Equipment controller EC 531

Monitoring and control in a single unit

The EC 531 is an all-in-one solution for control and monitoring of sewage pumping stations with one or two pumps. It offers straightforward control and monitoring via floats or advanced control via a continuous level signal. EC 531 is also equipped with smart VFD control including PID and Best Efficiency Point (BEP), which save energy, and equipment costs.

Equipment controller EC 531
Main benefits
  • Operates as a standalone control and monitoring unit
  • Minimizes operating costs and energy consumption
  • Increases pumping station availability
  • Easy to use and configure with built-in operator panel
  • Supports all aspects of the LCC (life cycle cost) calculations

Main applications
  • Monitor and control of municipal wastewater pumping stations
  • View alarms, pump status and trends
  • Advanced monitoring including crash log functionality
  • Manually control pumps and change settings
Main design features

All functionality you need is integrated into the EC 531 equipment controller. The functionality to help monitor the equipment condition as well as to optimize and reduce risk of overflow, reduce energy costs and cleaning costs etc., is standard. EC 531 gives you instant access to alarms, pump status, level information and trends – both on site and remotely. Functions that help to prevent downtime and flooding are also included.

The equipment controller EC 531 can be used with one or two pumps.

The controller comes with a graphical display offering a full user interface. Level sensing in the pit can be performed using either float switches or a 4-20 mA level sensor.

Communication port RS 485 for sending and receiving information to peripheral products via Modbus interface which gives:

  • Less IO needed
  • Reduced wiring
  • Access to additional data via external devices
Key control parameters
  • Level set-point, including time delays
  • Speed of level change
  • Random start levels
  • Tariff control
  • Maximum runtime
  • VFD control logic, including flow calculation, day set points, night set-points and adjustable pump reversal speed
  • BEP (best efficiency point)
  • Data communication:
    Communication via Modbus (RTU / TCP) protocol with other telemetry or SCADA systems
    I/O and register cross-reference tables for efficient communication setup
    Ethernet communication support
Best efficiency point (BEP)
Best efficiency point (BEP) diagram
Example of BEP (best efficiency point)

EC 531 has built-in BEP (best efficiency point) control logic functionality. BEP is the point at which the pump operates at peak efficiency. At this point, flow enters and leaves the pump with a minimum amount of flow separation, turbulence and other losses.

Operating the pump closer to its BEP will result in less stress and wear, which increases the reliability and life span of the pump.

At start up, the EC 531 will run a number of capacity-contra-run-frequency calculations to determine the optimum frequency to operate the pumps. This test cycle repeats with a pre-set time interval.

Added value when controlling the pump based on BEP control logic:

  • Lower running costs
  • Less hydraulic loads on mechanical components
  • Less stress on bearing and shaft vibrations
  • Less audible noise
  • Less suction recirculation, (This also reduces the risk of the pump clogging.)
Applications
  • Commercial waste disposal from toilets
    Commercial wastewater from toilets comprises all sewage water flushed from toilets on commercial, industrial or public properties.

  • Commercial wastewater without toilet waste
    Commercial wastewater without toilet waste includes drainage and grey wastewater.

  • Domestic waste disposal from toilets
    Domestic wastewater from toilets comprises all sewage water flushed from toilets or residential properties.

  • Domestic wastewater without toilet waste
    Domestic wastewater without toilet waste includes drainage and gray wastewater.

  • Flood control
    Climate change is challenging natural disaster prevention. When water runs off the land in large quantities, Sulzer’s comprehensive range of pumps provide reliable, cost effective and efficient solutions for flood control.

  • Inlet pumping station
    Inlet pumping stations are somewhat similar to large terminal pumping stations. Depending on the depth of the incoming sewer, the lifting heads can range from around 2 up to 30 meters. To prevent hydraulic shock loads, which negatively impact the biological process, the stations often make use of variable-speed drives and/or several pumps in parallel.

  • Network pumping station
    Network pumping stations collect municipal wastewater from residential homes and communal schemes. Installed in dry or wet wells, the pumps deliver the effluent to a terminal pumping station. Since most pumping stations are not equipped with screens, the pumps must cope with difficult materials such as fibrous sanitary and packaging items.

  • Outlet pumping stations
    Outlet pumping stations are required when the level of the treatment plant is lower than that of the receiving water. This is especially true when discharging into a river, which can rise during heavy rain or flood periods, or into the sea, where the level varies with the tide. Outlet pumping stations may also be needed to compensate for increasing frictional losses in the outgoing pipe at high flows, for example in long sea outfall pipes.

  • Storm water pumping station
    During heavy rainfall, storm water pumping stations deliver large volumes of water at low head to receiving surface waters or sewers. Having long been a part of flood management, they are increasingly involved in climate adaptation strategies for low-lying coastal cities.

  • Storm water retention tank
    Storm water retention tanks act as a buffer during periods of heavy rainfall. This is increasingly important as areas become more developed, with hard surfaces such as roofs, roads and parking lots that cannot absorb the rainwater. When storm water retention tanks are implemented, gravity or pumps can be utilized to provide a reduced continuous flow into the sewer system. Sulzer expertise makes it possible to avoid peak hydraulic loads and to limit the stresses on existing sewer systems.

  • Terminal pumping station
    Terminal pumping stations receive municipal wastewater from network pumping stations. Installed in dry or wet wells, the pumps forward the medium to a treatment plant for final purification. Due to the lack of screens at most pumping stations, difficult materials such as fibrous sanitary and packaging items are a constant threat to uptime.
Related products
  • Float switch type ABS KS
    The KS float switch, used in liquids for control or signal activation, operates in response to the liquid level. It is also suitable for use in sewage and for automatic level control. The KS float switch is impact- and shock-resistant, mercury-free, and environmentally friendly.

  • Submersible pressure sensor type ABS MD 126
    The MD 126 is a high-accuracy submersible hydrostatic level sensor. Encapsulated in stainless steel and resistant to sewage water, it is designed to measure levels in liquids such as storm water and wastewater in sump pumps.

  • Submersible pressure sensor type ABS MD 127
    MD 127 is a sewage water resistant, stainless steel encapsulated, submersible, hydrostatic level sensor of very high accuracy and over pressure capability. It is designed for level measurement in liquids like stormwater and wastewater in pump sumps. When connecting the 2-wire loop powered sensor in series with a DC power supply, the MD 127 gives a 4 to 20 mA output signal which is proportional to the level of the liquid.

  • GSM 3G modem type ABS CA 523
    The CA 523 is a 3G modem suitable for use with all type ABS controllers equipped with RS 232 modem communication. The modem kit comes complete with modem, dipole type T antenna, power cable and a DIN-rail socket. Diodes for indication of power and network status.

  • Submersible pumps
    Sulzer offers one of the most comprehensive ranges of submersible pumps available on the market today. The applications extend from pumping of light and medium duty within residential and commercial properties to pumping of heavy duty with high concentration of rags and solids in municipal wastewater collection networks and in industrial wastewater applications.

  • Submersible mixers
    Sulzer's energy efficient submersible mixers are suitable for a wide range of applications in industry and municipal treatment plants. They provide the right solution to match mixing tasks for agitating, blending, mixing, dissolving and suspension of solids in industry and municipal treatment plants.
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