STRATE (UK) Limited

Control for AWALIFTS

         2DF2          *DF4         Level Monitoring       Alarm Warning      

Single switch-unit The standard switch-gear has applications in all pumping stations with one pump. The unit can be automatically operated or stopped. They have thermal motor-protection Switch-gear

Technical data  Base unit 2DF2

CPU: CMOS Microprocessor with RISC CPU watchdog

Operating display: LED's for operating conditions, the three switch levels in collecting chambers, operation of each pump, adjusting switches for run-time, pause-time and delay-time and buttons for direction control of each pump.

I/O: 4 Digital inputs, 2 pup outputs, 1 fault output (relay output 230 V/2 A)

Power Requirement: 230 V AC (±10%) /50 Hz (±2%)

Operating Temp.: -15°C to +55°C

Humidity: <90% at 20°C

Max. altitude: 3000 m above sea level

(Specifications subject to alteration)

Standard double switch-gear

Use  Pumping stations with two pumps need switch-gear which is able to cope with the particular process demands and to cope with the operating conditions. For the particular requirements of the STRATE AWALIFT pumping stations our controller 2DF2 has been developed which is also applicable for the control of submersible pumps.

Function The controller controls the automatic switching of the pumps. For water-level dependent control a level monitoring system type MB is necessary as an optional extra. When one pump malfunctions the other pump automatically switches in. In cases where the in-flow is particularly high the pumps are operated in parallel. Running, pause and delayed operating times are settable in 16 steps to suit the operating conditions.

.DF4 is the modern functional unit for operation of  STRATE  pumping gear

The control system DF4 serves for control of sewage plants with 2, 3 or 2 x 2 pumps.

In planning and designing large sewage networks with central works the monitoring and control of the pumping equipment is becoming ever more important. To meet these needs we have developed for you a new switch generation the .DF4. The operating unit .DF4 are the cornerstone of STRATE switchgear for control and monitoring of the sewage pumping ear AWALIFT.The .DF4 can be operated and programmed at many levels by service personnel, plant manager and/or the STRATE service.

The serial interfaces serves as connection for an oprator panel or a Mobile telephone for ShotMessages Services or for a modem for data transmission to the sewage plant and/or STRATE and for connection of a computer in the pumping station (e.g. STRATE service). Also possible, in addition to operation in situ, is remote programming, displaying and recording of switching points, dates and times The .DF4 display on a 4-line display every conceivable operating state for sewage pumping gear and also many other additional features. Naturally the corresponding zero potential connections to the pumping gear are provided. In the event memory
(ring buffer) amongst other things the last 256 operations are stored and displayed.

Single operation of the pumps with adjustable pump run-time, parallel operation, variable pause times for pump switching (throttled operation) and adjustable post-run to avoid valve hammer are some of the possibilities with the .DF4. A light display gives information on the status of the collection chambers of the AWALIFT plant.

Level control HWAS or MBAS with analogue pressure sensor allow a continual display of the filling level and an optimal switching accuracy. Furthermore we have developed the STRATE-ABF system for you with remote data transfer, process visualisation and service facility (STRATE control). The data transfer is achieved by modem which are installed in the sewage works and each individual pump. For this a remote cable or a telephone line must be provided.

In the sewage plant all the data from the individual pumping stations is displayed and controlled on a computer using a visualisation programme (e.g. ATV_Richtlinie H260). With the possibility of changing the pumping station parameters by the use of special software the individual pumping stations can be controlled from the sewage works.

With the STRATE control service unit we provide futuristic customer service possibilities. A remote diagnosis as well as remote control from our factory is also possible. Long operating cycles and unnecessary servicing works can be avoided and the maintenance costs thus reduced to a minimum.

Level Monitoring Systems - for the efficient control of STRATE sewage pumping stations

 HWWS                                   HWAS

Type MB  For single units and double units up to AWALIFT 1/..

MB Contact-maker for the switching point of pumps on/off, pause and parallel operation. Mechanical links and switch are mounted in a plastic housing which can be installed outside the collecting tank.

MBAS Pressure transmitter for analogue level determination conceived in particular for operation with the .DF3 function unit. Power supply 24 V DC. Zero potential measuring signal 4.....20 mA. Pressure range 0.1-1 mwc, safe at several times over-pressure.

MBASBN For particularly important pumping stations, we have produced contact-makers that are made of two entirely different independent systems in order to guarantee a particularly high plant reliability. An analogue system for control via SPS and a contact-make-unit of a mechanical nature to provide emergency control in the case of failure of one of the components. This system consists of the contact-maker MB and the analogue pressure-transmitter MBAS.

Type HW For pumping stations with two or more up to AWALIFT 2/...

HWS Closed, pneumatic switching-system, sewage-resistant pressure-bellows connected via a protective tube to the end-membrane. The micro-switches for the 4 switching points are easily accessible in a steel housing mounted on the collecting chamber.

HWWS Like HWS but with a built-in continuous level display.

HWAS Pressure transmitter for analogue level determination designed in particular for operation with the .DF3 function unit. Power supply 24 V DC. Zero potential measuring signal 4.....20 mA. Pressure range 1.5-3 m WS, safe at several times over-pressure.

HWASBN For particularly important pumping plants, we have produced contract makers that are made of two entirely different independent systems in order to guarantee a particularly high plant reliability. An analogue system for control via SPS and a contact-make-unit of a mechanical nature to provide emergency control in the case of failure of one of the components. This system consists of the contact-maker HWS and the analogue pressure-transmitter HWAS.

Alarm warning systems

For reliable fault-monitoring

Alarms can be on the pump-unit, either visually or acoustically, or by means of remote transmission by a telephone or fixed line they can be displayed in a central unit.