WATER TREATMENT PLANTS PROCESS DESCRIPTION

Water Treatment Plants PROCESS DESCRIPTION SUMMARY Water line Mud line Criteria of use for Power Electronics equipments

General Process WATER LINE 1

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE Water entry and rough-dressing Elevation Reagents dosage De-sanding and Degreasing Primary decantation Biological reagents Clarifiers

1. WATER ENTRY AND ROUGH-DRESSING Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 1. WATER ENTRY AND ROUGH-DRESSING ENTRY: Through several collectors. » Water collectors LARGE OBJECTS PRE – ROUGH-DRESSING Well of large objects with a first pre-roughdressing railing of 25cm. It is removed once a day, introducing a bivalve “spoon” and cleaning the bottom of the well. » Pre-roughdressing of large objects

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 1. WATER ENTRY AND ROUGH-DRESSING LARGE OBJECTS PRE-ROUGHDRESSING: Waste removal TRANSPORT BANDS: Temporized action according to the elevation and descent cycle of the railings. In case of raining, the cadence is decreased increasing the frequency of elevation and descent of it. » Large objects removal

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 1. WATER ENTRY AND ROUGH-DRESSING LARGE OBJECTS PRE-ROUGHDRESSING: It is a complement for the previous phase by means of two rough-dressing railings of 10cm. RAKES » Large objects rough-dressing

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 1. WATER ENTRY AND ROUGH-DRESSING ROUGH-DRESSING OF SMALL OBJECTS: Part of the previous process. Two railings of 3,5 cm. The rakes sweep out all the material, which falls on a conveyor belt. THE ELEVATION PROCESS IS MADE PREVIOUSLY. (There are Wastewater treatment plants where the elevation is made after all rough-dressings). TRANSPORT BANDS FOR ROUGH-DRESSING OF SMALL OBJECTS: Its action depends on the elevation and descent cycle of the rakes. » Small object rough-dressing RAKES » Transport bands for small objects

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 2. WATER ELEVATION In the rough-dressing processes, water is raised up to 8,28 meters height, with two complementary drives: FIRST DRIVE: TWO SUBMERGED PUMPS Flow = 1,2m³/seg. Advantage = Less maintenance required than the screws (belts, bearings, …). Disadvantage = More sensitive to obstruction » Elevation submerged pumps

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 2. WATER ELEVATION In the rough-dressing processes, water is raised up to 8,28 meters height, with two complementary drives: SECOND DRIVE: SCREW OF ARCHIMEDES Flow = 1,24m³/seg. Advantage = Great elevation capacity. Immune to obstructions. Disadvantage = High maintenance cost. » Screw of Archimedes

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 2. WATER ELEVATION In the channel there are ultrasonic probes of 6m scope to measure the height of the water surface, they measure the level. They are ultrasonic to avoid the contact with the water. FUNCTIONING: If the water surface goes down (decreases), then the intelligent system stops the pumps to protect them. If the water surface goes up (increases), then the system starts them again according to the set reference. » Elevation pump 01 » Elevation pump 02

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 2.a. ROUGH-DRESSING EXIT AND BIFURCATION FIRST FLOW DIVISION IN THE PLANT. After the rough-dressing process the water line bifurcates symmetrically. Both circuits work equally. » First flow division in the plant

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 3. REAGENTS DOSAGE REAGENTS CONTROL CENTRE: There is an automatic and centralized pumps system which allows a correct dosage of reagents. The main object consist in helping the increase of the size and weight of certain organic particles during this phase, so that the sedimentation, which will begin in the next stage will be easier and faster. This way, the performance of the plant is optimized. Two kind of reagents are dosed: COAGULANTS FLOCCULANTS » Reagent dosage centre

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 3. REAGENTS DOSAGE COAGULANTS DOSAGE: It is a compound called Ferric Sulphate. It is very dense like sweet and can be stored in deposits, and it will be diluted into water to be dosed afterwards. It will be aggregated to the purifying process in first place. THREE DOSAGE PUMPS » Ferric sulphate pump detail » Ferric sulphate dosage pumps

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 3. REAGENTS DOSAGE COAGULANTS STORAGE: Storage deposits don’t need to be in the control center of dosage. COAGULANT ADDITION » Ferric sulphate storage » Ferric sulphate dosage

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 3. REAGENTS DOSAGE FLOCCULANTS DOSAGE: It is a compound called Polyelectrolyte. It is always delivered as powder, which is diluted into water, where will remain during one hour (maturing process). Afterwards it will be dosed. It is the second one to be aggregated to the purifying process. TWO DOSAGE PUMPS » Polyelectrolyte pump detail » Polyelectrolyte dosage pumps POLYELECTROLYTE

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 4. DE-SANDING AND DEGREASING DE-SANDER: It is a wide double channel with a cross carriage (similar to a crane) , which sweeps out the whole channel very slowly, so that the submerged pump attached will suction the sand of the channel. PUMP + CARRIAGE » De-sander bridge detail » De-sander and de-grassing channel

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 4. DE-SANDING AND DEGREASING SAND EXTRACTION: The extracted sand is pressed dry in the sand classifier (there is one in each side of the channel) This is already a waste, which will be carried to an authorized wasteway. SANDS CLASSIFIER » Final waste sand » Sands dryer

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 4. DE-SANDING AND DEGREASING GREASING EXTRACTION: Meanwhile the sand is extracted, the grease is separated and moved toward the sides, where a scraper will push it to the end of the channel. At the end of the channel there are two wells where this grease is collected. TWO SIDES PER CHANNEL » Channel sides for greases extraction » De-sander and degreasing channel

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 4. DE-SANDING AND DEGREASING GREASING EXTRACTION : The grease is collected in the degreaser (one for all the channels). This waste will be carried to an authorized wasteway. DEGREASER » Degreaser detail » Sands dryer

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 4.a. DE-SAND EXIT AND NEW BIFURCATION SECOND CHANNEL DIVISION IN THE PLANT. After the de-sander the channel bifurcates symmetrically once again. At the end of the de-sanders there are four decanters. Every circuit (four in total) works the same way. SANDS EXTRACTION BIFURCATION » Detail of sands exit » Bifurcation of sands collector

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 5. PRIMARY DECANTATION MUD DECANTATION AND FLOATING – PARTICLES COLLECTION: The water is distributed into 4 decanters of Ø 40m and 3m height with a capacity of 3.700m³. They are provided with a radial bridge which has scrapers in the bottom part for mud extracting and additionally it has a superficial scrapers to collect the floating-particles (surfs). » Primary decanter

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 5. PRIMARY DECANTATION MUD DECANTATION AND FLOATING – PARTICLES COLLECTION : Sweep time approximately 45. min. Water must remain 1.5 hours inside the decanter. Water enters the decanters in the middle through a baffle, which breaks the speed, and goes out through the perimeter. » Primary decanter detail

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 6. BIOLOGICAL REAGENTS TREATMENT WITH MICROORGANISM: When water is in this stage, germs which grow up here feed themselves with all the biodegradable particles contained in the water. This germs live thanks to the oxygen, which is constantly blowed. » Biologic reactors 01 » Biologic reactors detail 01

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 6. BIOLOGICAL REAGENTS OXYGEN BLOWING: Four reactors with 5.200m³ of unitary volume which are provided with four airing units as turbines of 180CV, two of them of double speed. » Biologic reactors detail 02 » Biologic reactors 02

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 6. BIOLOGICAL REAGENTS OXYGEN BLOWING: To keep constant the bacterium volume, it is required to control the oxygen blowing. That’s the reason for having double speed in the turbines: to control the speed depending on this parameter. Double speed control: SLOW SPEED HIGH SPEED » Airing units

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 7. CLARIFIER SECONDARY DECANTATION: To decant all those particles which did not sediment in the first stage, by means of the transformation suffered thanks to the biologic reactors action. FLOATING SURFS » Secondary decanter detail 01 » Secondary decanter 01

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 7. CLARIFIER SECONDARY DECANTATION : The process is realized on four circular clarifiers with 45m of diameter and 3m height. They have a unitary volume of 4.770m³, where the biologic mud sediment, and separate from the purified water. A part of the floating surfs escape out of the clarifier. This will be correct if the water conditions are under the established limits. » Secondary decanter 02 » Secondary decanter detail 02

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE 7.a. WATER LINE END PURIFIED WATER EXIT: The purified water can follow three different process: 1. Irrigation net. 2. Emissary and sending to the sea. Maintenance and regeneration of the coast line. 3. Third treatment and afterwards 3.1. Irrigation 3.2. Emissary and sending to the see. » Coast line regeneration PURIFIED WATER: Ready for irrigation, cultivation, Albufera maintenance. » Albufera regeneration

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE INDUSTRIAL WATER INDUSTRIAL WATER: In the treatment plant there is an internal industrial water network. The water exiting from the clarifiers which goes to this industrial water system, has to go into a sand filter tank firstly and after that can incorporates to the water distribution system. » Sand filter for industrial water » Industrial water group

Water Treatment Plants PROCESS DESCRIPTION – WATER LINE EMISSARY EMISSARY: The water not assigned for irrigation, goes to the emissary to be pumped to the sea. The sending of submarine water is realized by means of motors and gravidity. » Emissary – water to the sea 01 » Emissary – water to the sea 02

General Process MUD LINE 2

Water Treatment Plants PROCESS DESCRIPTION – MUD LINE Thickener – Floater Digester – Gas-meter Dehydration

Water Treatment Plants PROCESS DESCRIPTION – MUD LINE 1. THICKENER - FLOATER MUD SEPARATION AND BIOLOGIC MUD: Before make themselves thick, the mud must suffer a sifting process to avoid further problems in the digestion process. Installations consist of: Three thickeners based on gravidity (primary mud: diameter 27m and 3m height). Its functioning is similar to decanters functioning, the scraper sweeps the bottom instead of the surface. MUD EXTRACTION PUMPS » Gravidity thickeners » Mud extraction pumps in thickeners

Water Treatment Plants PROCESS DESCRIPTION – MUD LINE 1. THICKENER - FLOATER MUD SEPARATION AND BIOLOGIC MUD: Before make themselves thick, the mud must suffer a sifting process to avoid further problems in the digestion process. Installations consist of: A floater (biologic mud: diameter 12,5m and 393m³ volume). In this floater air is injected in order to help the mud to float, so that can be removed by means of a superficial scraper. MUD EXTRACTION PUMPS » Mud floater » Mud extraction pumps in floaters

Water Treatment Plants PROCESS DESCRIPTION – MUD LINE 2. DIGESTER – GAS-METER MUD DIGESTION: The digesters function is to produce a biochemical transformation in the mud during 21 days at 37ºC of temperature, reducing in this way the organic material around the 40%. » Mud digester At the end of this process we obtain two products: Treated mud: Which will suffer a dehydration process to be transformed into fertilizer. Biogas: That is a gases mix containing 65% of Methane. This gas will be employed in generating electric energy.

Water Treatment Plants PROCESS DESCRIPTION – MUD LINE 3. DEHYDRATION REAGENTS INJECTION: Mud and polyelectrolyte are injected before realizing the centrifuging. Dosage pumps pretend to dose the maximum mud amount as possible to optimize the efficiency of the process. The polyelectrolyte must mature during 1 hour like in the water line process. CENTRIFUGAL MACHINES » Mud centrifugal machine to remove water

Water Treatment Plants PROCESS DESCRIPTION COMPLETE LINES: FLOW DIAGRAM FOR WATER AND MUD. ACTUATORS VSD / SOFTSTARTERS CONTACTORS HYDRAULIC - RELAYS PNEUMATIC - RELAYS CONTACTORS VSD / SOFTSTARTERS CONTACTORS CONTACTORS VARIABLE SPEED DRIVES VARIABLE SPEED DRIVES VARIABLE SPEED DRIVES CONTACTORS

Criteria of use for Power Electronics Devices VARIABLE SPEED DRIVES & SOFTSTARTERS 3

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE – ACTUATORS FOR PRE-ROUGH-DRESSING AND ROUGH-DRESSING OF LARGE OBJECTS STAGES TRANSPORT BANDS PRE – ROUGH-DRESSING OF LARGE OBJECTS 3kW: Contactors. RAKES FOR ROUGH-DRESSING THE LARGE OBJECTS: Relays use. Hydraulic system. Recommended equipments: V2 and V5 softstarters. [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] This stage intend to extract the bigger residual objects to make easy keeping the flow constant. This action is realized one per day using small powers. At first moment there are no Power Electronics devices although the softstarters means always an improvement to make the system automatic.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE – ACTUATORS FOR SMALL OBJECTS ROUGH-DRESSING STAGE TRANSPORT BAND FOR SMALL OBJECTS ROUGH-DRESSING 3kW: Contactors. RAKES FOR SMALL OBJECTS ROUGH-DRESSING: Relays use. Hydraulic system. Recommended equipments: V2 and V5 softstarters. [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] This stage intend to extract the smaller residual objects to make easy keeping the flow constant. This is an automatic operation realized increasing or decreasing the cadence depending on the requirements. At first moment there are no Power Electronics devices although the softstarters means always an improvement to make the system automatic.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE – ACTUATORS FOR ELEVATION STAGE SUBMERGED PUMPS: Variable Speed Drives. Recommended equipments: SD700 Series SD450 Series [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] The submerged pumps try to keep the input flow constant in order to warranty a correct treatment of the water, always considering that there is no possibility of accumulating this input water. Its possible to overcome problems if one of the lines is stopped or if a part of the plant is on maintenance. The VSD allows to control the flow without stopping one of the pumps completely. The demanded flow is divided between both pumps. The variable speed drive allows regulate the speed required to keep this flow constant.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE – ACTUATORS FOR ELEVATION STAGE SCREW OF ARCHIMEDES: Softstarter. Recommended equipments: V5 Softstarter. [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] The screw has a gate to regulate the flow but if the flow increases, the screw will try to elevate more water. That could provoke it to be broken. This system could be improved implementing a VSD controlled by this current signal. To avoid this situation, it is possible to fix a current signal as a reference thanks to a transformer in order to protect the screw.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE – ACTUATORS FOR REAGENTS DOSAGE STAGE THREE PUMPS FOR COAGULANTS DOSAGE: Variable Speed Drives. TWO PUMPS FOR FLOCCULANTS DOSAGE: Variable Speed Drives. Recommended equipments: SD100 Series. SD250 Series. SD450 Series. [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] Allows to control the exact dosage of the reagents according to the results of test and analysis realized on the laboratory each hour. Complete control total of the dosage to treat correctly water with different quality (for example cleaner water and higher amount in summer). Possibility of implement a closed control loop with the drives, where the reference will be a signal coming from the flowmeters. If the flow increases / decreases  the dosage will be increased / decreased. Without VSD it would not be possible.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE – ACTUATORS FOR DE-SANDING AND DE-GREASING DE-SANDER PUMP: Contactors. MOTOR OF DE-SANDER CARRIAGE: Contactors / reverse operation. MOTOR FOR THE BAND OF THE SAND CLASSIFIER: Pneumatic. Relays. MOTOR FOR GREASE SCRAPER: Pneumatic distributor. DE-GREASER: Mechanical. Recommended equipments: V2 and V5 softstarters. [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] This stage tries to eliminate the finest sands and greases of the process. Those actions are continuously realized. The power used is small. At first moment there are no Power Electronics devices although the softstarters means always an improvement to make the system automatic.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE – ACTUATORS FOR PRIMARY DECANTATION STAGE MOTOR FOR IMPULSE MUD TO DECANTATION: Contactors. MUD PURGE: Contactors. FLOATING SURFS ELIMINATION: Contactors. Recommended equipments: V2 and V5 softstarters. SDRIVE VSD (small power) [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] To separate mud from the water to insert it on the mud line. The mud purge is done step by step and it is a timer action. By calculating the mud amount it could be possible to use a turbidimeter and a drive to control the flow. The sweeping process is continuous, the required power is small and the speed is fixed, for all that Power electronics softstarters could means an improvement.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE – ACTUATORS FOR BIOLOGIC REACTORS STAGE OXYGEN BLOWING TURBINES: Softstarters. Recommended equipments: V2 and V5 softstarters. [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] In these tanks the bacterium should be keeping alive and in an appropriate number according to the process and the analysis. As an alternative to the softstarter a VSD could be used since it offers more regulation points. An oxygen meter could be implemented giving a signal to the drive (Xppm of oxygen dosed by the drive).

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE – ACTUATORS IN THE SECONDARY DECANTATION MOTOR FOR IMPULSION TO MUD DECANTERS: Contactors. MUD PURGE: Contactors or Softstarter. FLOATING SURFS ELIMINATION: Contactors. MUD RE-CIRCULATION: Contactors. Recommended equipments: V2 and V5 softstarters. SDRIVE VSD (small power) [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] To separate the mud from the water to insert it on the mud treatment line. A part of it goes directly to the biologic tanks to keep the bacterium number in accordance to the requirements. The mud purge is done step by step and it is a timer action. By calculating the mud amount it could be possible to use a turbidimeter and a drive to control the flow. The re-circulation is continuous and the volume is high (1300m³/h). The sweeping process is continuous, the power required is small and the speed is fixed, for those reasons Power electronics softstarters could means an improvement.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE ACTUATORS FOR PRESSURE GROUP – INDUSTRIAL NET – IRRIGATION NET MOTOR FOR INDUSTRIAL NET PUMPS: 1 VSD + 2 Softstarters. MOTOR FOR IRRIGATION NET PUMPS: Variable Speed Drives. Recommended equipments: SD700 Series SD450 Series V5 Softstarter [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] Typical pumping control application. Versatile and flexible: It intends to control the pressure on the internal distribution system of industrial water. The irrigation of the whole plant is also controlled by VSD. The control is done by the drive. In case of a fault, the PLC will take the control over the softstarters.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES WATER LINE – ACTUATORS OF EMISSARY MOTORS OF THE EMISSARY: 1 VSD + 2 Softstarters + Contactors. Recommended equipments: SD700 Series V5 Softstarters [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] Pumping control application where there is so much flow and the height is small. The pumps go out of the curve easily and the consumption increases excessively. Equipment regulation allows to start the pump only 1 or 2 times per day, saving around 24.000€/month. Here is needed a startings number optimizing (the rest of the process to lead the water to the sea is done by gravidity).

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES MUD LINE – ACTUATORS FOR THICKENERS MOTOR FOR BOTTOM SCRAPER: Contactors. MUD EXTRACTION PUMPS: Softstarter or Variable Speed Drives. Recommended equipments: SD700 Series V5 Softstarters [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] Once the mud is collected and has to be sent to the digester, it is convenient that the additions are as homogeneous as possible. In this stage we pretend to optimize the startings to avoid the mud hammer because due to the mud density, the pipes of the installation could be seriously damaged. Distances to the digester are big and the column of mud to be supported is high. We get a great help from the drive in this dosage.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES MUD LINE – ACTUATORS FOR FLOATER MOTOR OF SUPERFICIAL SCRAPER: Variable Speed Drive. MUD EXTRACTION PUMPS: Softstarter or Variable Speed Drives. PRESSURIZING PUMPS : Softstarter. Recommended equipments: SD700 Series V5 Softstarter [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] The superficial mud varies continuously. In this stage we pretend to optimize the startings to avoid the mud hammer because due to the mud density, the pipes of the installation could be seriously damaged. Distances to the digester are big and the column of mud to be supported is high. To keep the sweeping constant a variable speed drive is use, to set the system according to the current mud amount.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES MUD LINE – ACTUATORS FOR DIGESTER – GAS-METER STAGE MUD MOVEMENT PUMPS: Softstarter or Star – Delta contactor. Recommended equipments: V5 Softstarter. [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] In this stage the material is reduced and as a secondary effect a gas generation is produced. This gas is used in the cogeneration plant. The pumps that move the mud stop two times per day for cleaning process. Each time a new start occurs will appear the “mud hammer” problem. The pipes are suffering considerably. Using a softstarter this situation will be improved.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES MUD LINE – ACTUATORS FOR DEHYDRATION STAGE DOSAGE PUMPS FOR MUD AND REAGENTS: Variable Speed Drives. CENTRIFUGAL MACHINES: Variable Speed Drives. Recommended equipments: SD700 Series SD450 Series [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] The pumps that realize the dosage must be set at several reference points. Depending on the realized tests, it should be possible to calculate the reagent dose. The starting of the centrifugal machines requires a huge inertia moment. That implies to apply a starting ramp very long (3 – 4min). Without drives this process could not be realized. Only the VSD can offer this warranty.

Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES MOTOR TORQUE CURVES EXAMPLE: In = 150A Selected Frame = 210A Maximum Torque = 1,5Tn Imax = 1,5x210 = 310A Relation Tmax/Tn 310 / 150 = 2,1Tn [ BACK TO ELEVATION ]

Thanks for your attention Presentation WATER TREATMENT PLANT: Process description Realized Pilar Navarro Organized Marketing Department www.power-electronics.com ©2006 Power Electronics, S.L.