Used Ball Screw Drive for sale (37,191)

Condition: good (used), Large screw bookbinding press 50x56cm The device is fully functional, ready to work. Manufactured by Hugo Peege, Leipzig, Germany. The press has a tapping block that increases the pressing force. Pressure 5t Plate dimensions 500x560mm Hnedpfx Aswud Sgjg Neu

Condition: ready for operation (used), Screw Compressor HELIROTOR™ | TRANE Model: CHHC1E3F0L0 Made in USA Technical specifications: Compressor type: Screw HELIROTOR™ Refrigerant: R134a Hnedpfx Ajxb Aiuog Nju Power supply: 400 V / 3-phase / 50 Hz Starting current (WYE/Star): 748 A Starting current (Δ/Delta): 2424 A Condition: removed and stored at our warehouse; in good technical condition. Price: on request. Availability: in stock at EVROPROM; same-day dispatch possible.

Condition: excellent (used), Interroll roller conveyor 0.99m with drive Hedpfx Ashvmi Teg Nonu The Interroll roller conveyor element is in a very good condition. Furthermore, the roller conveyor has its own drive motor. Width: 400mm Length: 990mm Complete factory closure, large selection of storage platforms, pallet racks, shelf racks, paternosters. High quality industrial machines, lathes, grinding machines, hand machines Further articles - new and used - you will find in our shop! International shipping costs on request!

Year of construction: 2016, condition: as good as new (ex-display), Siemens motor 1FK7100-2AF71-1CH0 with Harmonic Drive gear HF-UC-65-80-2UH-SP from prototype machine with very few operating hours. Hjdsirtiqjpfx Ag Nonu 2 motor-gearbox units available, each 1.500€.

Condition: good (used), Screw Conveyor Custom made conveyor Hedpfx Ajhfdvisg Nenu Overall dimensions: 3500 x 900 x 2600 mm Screw dimensions: diam. 150 x 2700 mm

Year of construction: 2011, condition: excellent (used), Lift&Drive 225P electric trolley. Powder coated steel and aluminium construction. Table dimensions: 100 cm x 40 cm. Hnodpfsf T R Nxex Ag Nou Minimum height of the roller table from the base - 67 cm Maximum height of the roller table from the base - 193 cm Nominal load capacity 225 kg. Rear-wheel brake. In addition to the central brake, the trolley also has a directional lock on the rear wheels, making it easier for the operator to guide the trolley in a straight line. P (Professional) trolleys are the largest, most stable, strong and flexible trolleys.

Condition: good (used), Bookbinding screw press 50×40 on a base The device is fully functional, ready to work. Format 500×400 mm Pressure 5t Hnjdpfjwud Saox Ag Neu

Condition: ready for operation (used), Year of construction: 2008, overall weight: 567 kg, Screw compressor YORK MTS36SBAD46/240 Manufacturer: YORK Model: MTS36SBAD46/240 Type: semi-hermetic screw Refrigerant: R134a Year of manufacturing: 2008 Hnedowb H Svspfx Ag Nou Power supply: 3ph, 400/460V, 50/60Hz Oil volume: 19l Weight: 567kg In stock: 6 pcs

Condition: new, Year of construction: 2025, *All of our products are made with care and covered for 1 year warranty! *Installation and Operator Training FREE • Model: FABO HY-600 • Type: Double Helix Screw Washer • Capacity: 60 ton per hour • Dimension: 1400 x 6650x1800 mm • Screw Size: Ø 600x6000 mm • Speed: 22 rev/min Hjdpfswrq Ddox Ag Nonu • Motor: 2 x 5.5 kW Heavy duty Gamak • Water Consumption: 55-205 m3 • Including chassis, motor and safety guards. FOR FURTHER INFORMATION PLEASE FEEL FREE TO CALL US!!!

Year of construction: 2016, condition: as good as new (ex-display), Siemens motor 1FK7105-2AC71-1CH0 with Harmonic Drive gear HF-UC-90-50-2UH-SP from prototype unit with very few operating hours. Hjdeir U Tyspfx Ag Nenu 2 motor-gearbox units available, each 4.300€.

Condition: good (used), Atlas Copco Screw Compressor, Screw Compressor, 75 kW Screw Compressor, Atlas Copco GA 75, Used Machine Hnodpotrdv Sofx Ag Nju Manufacturer: Atlas Copco Model: GA 75 FF Operating hours: 12000 (block replaced at 22000 hours) Overall dimensions: 2060 x 1040 x 1940 mm Weight: 1600 kg Year: 1990 Operating pressure: 10 bar Air delivery: 174 l/s Motor power: 75 kW

Condition: new, functionality: fully functional, power: 55 kW (74.78 HP), Year of construction: 2025, A coal ball mill, also known as a coal grinding mill, is a type of grinder used to grind and blend materials for use in mineral dressing processes, paints, pyrotechnics, ceramics, and selective laser sintering. It is a cylindrical device used to grind or mix coal, ores, chemicals, and other materials mechanically. Here are key features and aspects of a coal ball mill: 1. Cylindrical Structure: - The coal ball mill typically consists of a horizontal cylindrical shell. The inner surface of the shell is usually lined with abrasion-resistant material such as steel or rubber to protect it from wear. 2. Grinding Media: - Grinding media, such as steel balls or ceramic balls, are placed inside the coal ball mill to assist in the grinding process. The rotation of the mill causes the grinding media to cascade and grind the coal particles. 3. Coal Feed and Discharge: - Coal is typically fed into the mill through a central feed pipe, and the ground coal particles are discharged through a discharge end. The size of the coal particles is reduced during the grinding process. 4. Rotational Motion: - The coal ball mill rotates on its horizontal axis. The rotation of the mill is controlled by a motor, and the speed can be adjusted to control the grinding process and particle size. 5. Air Sweeping: - Some coal ball mills incorporate an air-swept design. Air is introduced into the mill to facilitate drying and transport of the pulverized coal out of the mill. This design helps in controlling the moisture content of the coal and aids in the grinding process. 6. Drying and Grinding: - In addition to grinding, the coal ball mill may also have a drying function. This is particularly important if the coal being processed contains moisture. The drying and grinding functions are often achieved simultaneously in some coal mills. 7. Control System: - Modern coal ball mills are equipped with control systems to monitor and regulate key parameters such as mill speed, feed rate, and temperature. This allows for optimization of the grinding process and efficient coal processing. 8. Application: - Coal ball mills are commonly used in coal-fired power plants and other industries where coal is used as a fuel. They are part of the coal pulverization system, which grinds coal into fine powder for combustion in boilers. Hsdpfx Aeq Nf U Eog Nsnu 9. Safety Features: - Safety features, such as monitoring devices and emergency shutdown systems, are often incorporated into coal ball mills to ensure safe operation. 10. Wear Protection: - Wear-resistant materials are used in critical areas of the coal ball mill to withstand the abrasive nature of coal and extend the life of the mill components. Coal ball mills play a crucial role in coal pulverization processes in power plants, contributing to the efficient combustion of coal for electricity generation. The specific design and features of coal ball mills can vary among different manufacturers and applications.

Condition: new, Year of construction: 2025, *All of our products are made with care and covered for 1 year warranty! *Installation and Operator Training FREE • Model: FABO HY-800 • Type: Double Helix Screw Washer Hnsdpfowclabjx Ag Neu • Capacity: 80 ton per hour • Dimension: 1750 x 8650x1900 mm • Screw Size: Ø 800x8000 mm • Motor: 2 x 15 kW Heavy duty Gamak • Water Consumption: 65-230 m3 • Including chassis, motor and safety guards. FOR FURTHER INFORMATION PLEASE FEEL FREE TO CALL US!!!

Condition: new, functionality: fully functional, Year of construction: 2025, There are several types of ball mill grinding plants designed for different applications and industries. The choice of the specific type depends on factors such as the material being processed, the desired final product characteristics, and the production capacity required. Here are some common types of ball mill grinding plants: 1. Open Circuit Ball Mill: - In an open circuit ball mill, the material passes through the mill only once, and the finished product is obtained directly. This type is suitable for dry grinding and often used for cement grinding. 2. Closed Circuit Ball Mill: - Closed circuit ball mills have a separator, which separates the fine particles from the coarse ones. The coarse material is returned to the mill for further grinding, while the fine product is collected and sent to storage. This type is commonly used in mineral processing circuits. 3. Overflow Ball Mill: - Overflow ball mills discharge the slurry over a trunnion at the discharge end. This type is suitable for wet grinding or when the slurry has a high moisture content. 4. Grate Discharge Ball Mill: - Grate discharge ball mills discharge the slurry through the grate at the discharge end. This type is suitable for dry or wet grinding and is often used for grinding materials with high moisture content. 5. Peripheral Discharge Ball Mill: - In a peripheral discharge ball mill, the grinding chamber is larger at the feed end, allowing the material to be discharged peripherally. This type is suitable for coarse grinding and often used for rod mills. 6. Planetary Ball Mill: - Planetary ball mills are designed for high-energy milling and are suitable for both dry and wet grinding. They have one or more grinding jars that rotate around a central axis, creating a planetary motion. This type is often used for laboratory applications. 7. Ball Mill with Ceramic Lining: - Some ball mills are lined with ceramics to reduce wear on the inner surface of the mill. This is particularly common in the production of ceramic materials, pigments, and refractories. 8. High-Energy Ball Mill: - High-energy ball mills use mechanical alloying processes to create new materials. These mills operate at high rotational speeds, causing the balls and the material being ground to impact with high energy. They are suitable for milling hard and brittle materials. 9. Air-Swept Ball Mill: Hnodjq Nx Aljpfx Ag Nju - In an air-swept ball mill, the material is fed into the mill with ambient air, and the finished product is collected in a dust collector. This type is commonly used for coal grinding in the cement industry. 10. Tube Mill: - Tube mills are long cylinders with a charge of steel balls used for grinding raw materials, coal, and clinker. They can be open or closed circuit and are widely used in cement and mineral processing industries. 11. Continuous Ball Mill: - Continuous ball mills operate continuously, and the material to be ground is fed at one end and discharged at the other. These mills are suitable for grinding materials in a continuous process.

Year of construction: 2025, condition: new, functionality: fully functional, A cement clinker grinding mill is a specialized equipment used to grind the hard nodular clinker into fine powder, which is cement. Most cement is currently ground in ball mills and also vertical roller mills, which are more effective than ball mills. Here are key features and information about cement clinker grinding mills: 1. Raw Materials: - The main raw material for making cement is clinker, which is produced by sintering limestone and clay. Other materials such as gypsum, fly ash, or slag may also be added during the grinding process to achieve specific properties. 2. Grinding Process: - The clinker and other additives are finely ground in the grinding mill to produce cement. The grinding process is a crucial step in cement production and contributes significantly to the final quality of the product. 3. Types of Mills: - Ball Mills: Traditional ball mills are commonly used for grinding clinker. They operate by rotating a cylinder with steel grinding balls, causing the balls to fall back into the cylinder and onto the material to be ground. - Vertical Roller Mills (VRM): VRM technology has become increasingly popular for clinker grinding. These mills use a rotating table with rollers to crush and grind the clinker, providing energy efficiency and a smaller footprint compared to ball mills. 4. Gypsum Addition: - Gypsum is often added during the grinding process to control the setting time of the cement. It prevents flash setting of the clinker and facilitates the formation of a workable and pumpable cement paste. Hnjdpoq Nfbhsfx Ag Nju 5. Quality Control: - Quality control measures, such as monitoring the fineness of the cement, chemical composition, and other properties, are implemented during the grinding process to ensure the final product meets the required specifications and standards. 6. Clinker Cooling: - Before grinding, the clinker is produced by heating the raw materials in a kiln. The clinker is then cooled before entering the grinding mill to prevent excessive heat build-up during grinding. 7. Dust Collection and Environmental Considerations: - Dust collectors and air pollution control systems are often employed to capture and control the dust generated during the grinding process, addressing environmental and safety concerns. 8. Packaging and Storage: - After grinding, the cement is typically stored in silos before being packaged in bags or dispatched in bulk for distribution to construction sites or for sale in the market. Cement clinker grinding mills play a crucial role in the cement production process, and advancements in technology continue to improve the efficiency and environmental sustainability of the grinding process.

Condition: new, Year of construction: 2025, power: 7.5 kW (10.20 HP), Batch ball mills find applications in various industries where the processing of materials in discrete batches is required. The versatility of batch ball mills makes them suitable for a range of applications. Here are some common batch ball mill applications: 1. Ceramics Industry: - *Glaze Preparation:* Batch ball mills are extensively used in the ceramics industry for preparing glazes. Raw materials such as feldspar, quartz, and clay are ground with ceramic balls to achieve the desired particle size for glaze formulation. 2. Chemical Industry: - *Material Grinding:* Batch ball mills are used for grinding and blending various chemical materials. This includes the production of pigments, dyes, and other specialty chemicals where precise particle size control is crucial. 3. Pharmaceuticals: - *Drug Formulation:* In pharmaceutical manufacturing, batch ball mills are used for grinding and blending powders to create drug formulations. The controlled environment provided by these mills is essential for maintaining the integrity of pharmaceutical compounds. 4. Food Industry: - *Ingredient Mixing:* Batch ball mills may find application in the food industry for mixing and grinding ingredients. This can include the production of food additives, flavorings, and other powdered or granular products. 5. Mining and Minerals Processing: - *Ore Grinding:* Batch ball mills are used in mining and minerals processing for grinding minerals and ores. The controlled grinding helps in obtaining the desired particle size for subsequent processes, such as mineral separation or extraction. 6. Paints and Coatings: - *Pigment Dispersion:* In the paints and coatings industry, batch ball mills are employed for dispersing pigments into paint formulations. Achieving a uniform particle size is crucial for the quality and appearance of the final coating. 7. Building Materials: - *Raw Material Grinding:* Batch ball mills are used in the preparation of raw materials for the production of building materials, such as cement and concrete. Grinding of materials like limestone and clay helps in obtaining the desired fineness for subsequent processes. 8. Electronic Materials: Hjdpsq I N H Njfx Ag Nsnu - *Ceramic Powder Processing:* In the electronics industry, batch ball mills can be employed for processing ceramic powders used in the production of electronic components and insulating materials. 9. Research and Development: - *Material Testing:* Batch ball mills are often used in research and development laboratories for testing and optimizing material formulations. They provide a controlled environment for small-scale processing and experimentation. 10. Customized Applications: - *Specialized Processes:* Batch ball mills can be adapted for various specialized processes in different industries where precise grinding and mixing are required. Custom modifications can be made based on specific application requirements. When using a batch ball mill, it's important to consider factors such as the type of material being processed, desired particle size, and the specific requirements of the end product. Additionally, following the manufacturer's guidelines and maintaining proper operating conditions are essential for efficient and effective milling processes.

Condition: new, Year of construction: 2025, We have various kinds of ball grinding mill such as batch ball mill, rod mill, cement ball mill, mining ball mill, welcome to contact our team for further details according to your specific requirements. Hnsdsq I Nw Iepfx Ag Nsu

Condition: new, Year of construction: 2025, power: 300 kW (407.89 HP), A ball mill is a key equipment in the grinding process of barite. It is designed to grind and blend solid or hard materials into smaller pieces, particularly powder. In a barite grinding plant, ball mill is often used for grinding barite into an ultrafine powder for various applications. Here are key features and aspects of a ball mill used for barite grinding in a plant: 1. Mill Structure: - The ball mill for barite grinding typically consists of a horizontal cylindrical shell with ends that are flanged and bolted on. The ends may contain openings for feeding and discharging the barite. 2. Grinding Media: - Steel or ceramic balls are commonly used as grinding media in the ball mill. The grinding media helps in the grinding process by reducing the size of the barite particles. 3. Rotation: - The mill rotates on its horizontal axis. The rotational motion of the mill, driven by a motor, causes the grinding media to cascade and grind the barite. 4. Feed and Discharge: Hnsdsq Ngafjpfx Ag Nou - Barite is typically fed into the ball mill through a hopper or a conveyor. The ground barite particles are discharged from the mill through a discharge end. 5. Control System: - Modern ball mills are equipped with control systems to monitor and regulate critical parameters, such as mill speed, feed rate, and temperature. This allows for precise control of the grinding process. 6. Size Reduction: - The primary purpose of the ball mill is to reduce the size of barite particles. Grinding occurs as the barite is subjected to the impact and friction forces of the grinding media. 7. Classification: - Depending on the desired fineness, a classification system may be integrated into the ball mill to separate fine particles from coarse ones. This ensures that the final product meets the required specifications. 8. Dust Collection: - A dust collection system may be incorporated to capture and collect fine particles generated during the grinding process, ensuring a clean and safe working environment. 9. Liners: - The interior of the ball mill is often lined with wear-resistant materials, such as steel or rubber, to protect the mill shell from abrasion and ensure longer equipment life. 10. Application in Barite Processing: - The ball mill in a barite grinding plant is a crucial piece of equipment for processing barite ore into a fine powder. This powder is used in various industries, including oil and gas drilling, coatings, and pharmaceuticals. 11. Safety Features: - Safety features, such as monitoring devices and emergency shutdown systems, are typically incorporated into ball mills to ensure safe operation. The specific design and features of a ball mill for barite grinding can vary among different manufacturers and applications. It is essential to follow proper procedures and guidelines for the operation and maintenance of the equipment to ensure optimal performance and longevity.

Year of construction: 2025, condition: new, ceramic ball mill ,Batch ball mill ,also called ceramic ball mill ,it is used for fine grinding of feldspar,quartz,clay,ore and so on.The ceramic ball mill is mainly used for material mixing, grinding,uniform product fineness,and saving power.It can be dry or wet.The machine can use different liner types according to production needs to meet different needs.The fineness of the grinding operation is controlled by the grinding time ceramic ball mill Working principle when ball mill working,steel balls inside drum will rotate with the drum to some height,and then steel balls fall down with materials to reach the point of grinding. Hedpfovzx Aujx Ag Nonu Working Principle of Ceramic ball mill ceramic ball mill ,Intermittent ball mill grinding operation is finished in the cylinder body. When the cylinder rotates, materials ascend to a certain height and then fall along a certain path due to the balls' gravity. Two forces are generated on the balls inside. One is the force on balls through tangent direction; the other is a opposite force in the contrast to the diameter of balls, as a result of the force generated when the balls slide down. These two forces will constitute a couple for the steel balls. The balls are squeezed between the cylinder and the adjacent steel balls, so the couple can make unequal-sized friction force. The balls will orbit along with the cylinder axis and then fall down, which can produce a strong impact force on the ores in the cylinder body and, as a result, the ores will be crushed. In conclusion, the ores in the cylinder body are mainly crushed by composite effect of peeling force, impact force and extrusion force. Ceramic ball mill also named Intermittent ball mill which adopts the wet intermittent operation, is used for fine grinding and mixing the material such as feldspar, quartz, clay ceramic raw materials. The discharging and the mud size can through through 1000 sieve pore. This machine is high milling machinery, materials should be Broken in the fineness of the state into the grinding mill to get the highest efficiency and economic benefits. The cement mill is key equipment for the grinding process of the cement clinker after the crushing process of it. It is mainly used in the cement silicate product industry. After long term design and manufacture of the cement mill, our company now has series of cement mill with various specifications to meet with different requirement from our customers. Features of Cement Mill Our company adopts suitable transmission methods according to different specifications. We have brim drive and center drive as transmission form. The cylinder adopts new type step lining to increase the grinding area. And it is easily repairable and changeable. The new designed separate-chambered structure adopts flexible lifting blade and fixed lifting blade and it is easily fixed and repaired. Working Principle of Cement Mill The cylinder will rotate by the transmission device. Due to the inertial centrifugal force, the steel balls will stick on the liner plate and rotate with the cylinder together. When the steel balls come to a certain height, it will fall down by gravity and impact the raw material. And the repeated going-up, falling down, slide and roll of the steel balls can grind the raw material together with the liner plates.

Condition: new, fuel type: electric, Year of construction: 2025, machine/vehicle number: 2700x4500, Equipment: low noise, Main Technical parameters of the ball mill Drum diameter: 2400mm Drum length: 4500mm Motor power: 320KW Max input size: 25mm Capacity:35-60 t/h Weight: 72Tons Ball loading: 30Tons Besides this model, we also have the other models like 2700x4500, 3200x4500, 1830x13000mm, and so on, and we can also offer customerization service, we can also provide complete grinding solution for various industries like cement, quartz, ore beneficiation plant, and so on, welcome to contact us for more info. A ball mill is a common grinding machine used to grind and blend materials for use in mineral processing, including ore mining and the production of silica (silicon dioxide). When it comes to ore mining and silica grinding, the characteristics of the ore and the final product requirements will play a crucial role in selecting the appropriate ball mill. Here are some considerations for using a ball mill in ore mining and silica grinding: 1. Ore Characteristics: - Hardness: The hardness of the ore determines the type of ball mill that is most suitable. Harder ores may require a more robust and wear-resistant ball mill. - Particle Size Distribution: The initial particle size of the ore affects the grinding process. Different ores may require different approaches to achieve the desired particle size. 2. Silica Grinding: - Silica Content: If the primary goal is to grind silica, it's important to consider the initial silica content and the desired final particle size. Silica grinding often requires special attention to prevent excessive wear on the milling equipment. 3. Ball Mill Type: - Overflow vs. Grate Discharge: The type of discharge from the ball mill can impact the final product and the grinding efficiency. Overflow mills are generally used for most grinding applications, while grate discharge mills are more suitable for certain types of ores. 4. Mill Size and Capacity: Hsdpoq Igiijfx Ag Nonu - Mill Diameter and Length: The size of the ball mill should be selected based on the amount of material to be ground and the desired throughput. - Capacity: Ensure that the chosen ball mill has the capacity to handle the required volume of material efficiently. 5. Grinding Media: - Material and Size: The choice of grinding media (balls or cylpebs) and their size depends on the hardness of the ore and the desired final particle size. Different grinding media materials can impact the purity of silica during grinding. 6. Liners and Lifting Aids: - Liners: Consider the type of liners used in the ball mill to protect the shell and optimize the grinding process. - Lifting Aids: Some mills use lifting aids to enhance the grinding action and promote better mixing of the material. 7. Control and Monitoring Systems: - Automation: Utilize control systems to automate the milling process and ensure optimal performance. - Monitoring: Regularly monitor the milling process to adjust parameters as needed for consistent and efficient operation. 8. Safety Measures: - Safety Systems: Implement safety features to protect personnel and equipment during operation. Always follow the manufacturer's recommendations and guidelines for operation and maintenance to ensure safe and efficient use of the ball mill in ore mining and silica grinding applications.

Condition: used, Year of construction: 2018, operating hours: 625 h, 2018 | Genie TZ-50 DC w/Drive (17m) | Used Trailer-Mounted Boom Lift | 625 hours 📍Location: Latvia, Rīga 🚛 Delivery available to your destination – Use our shipping calculator to estimate transport costs! 💰 Buy Now for EUR 22000 or Make an Offer. Payment at delivery available for an affordable fee (subject to approval)* 👷‍♂️ Inspected by an independent expert 34 inspection points 34 approved ✅ 0 imperfect ℹ️ 0 issues ⚠️ 📌 Inspector's Comment: Rust on trailer , all functions operate 📄 Want to see the full inspection, extra photos, or a video? Tip: The reference "38155 Equippo" is commonly used when looking up more details online. Hnedpfx Aexl Iatjg Nju 💡 Why this machine and our service stands out: ✔ Thorough inspection by professionals ✔ Jobsite delivery available ✔ Money-Back Guaranteed ✔ Secure and flexible payment options 🔄 Considering other equipment options? We offer helpful tools and resources for all equipment owners and operators – easily accessible on our platform.

Condition: excellent (used), AUTOMATED BALL The vacuum concentration ball is used for the production of jellies, fruit and tomato concentrates, sauces and juices in general, and also for other liquid and semi-liquid food products. Hsdpfewny Nbjx Ag Nsnu The concentration ball is vertically cylindrical in shape, with a double bottom for indirect steam heating and with an agitator to prevent burning of the product. In order to concentrate the product, the machine has been connected to a group suitable for vacuum with condenser and pumps. The vacuum technique allows the evaporation of the water that is present in the treated product, at low temperatures, and guarantees economic convenience in terms of time allocated to the process and a more delicate treatment of the product. The production may vary depending on the product and the brix degrees.

Condition: good (used), Year of construction: 2019, 10 bars. 75kW. Safety valve has been removed (see picture N°6 inside). We are trying to recover that safety valves, buyer must assume we haven't found it back. Hnsdowfc T Rspfx Ag Nou design Pressure in Bars: 10 Weight in kg: 1420

Condition: used, Unused Kaeser HPC DSD205 rotary screw compressor with 110 kW drive. Hnodpfx Aexfi N Aog Neu

Condition: like new (used), OHK stainless hopper and screw Model: BTO Hsdpfx Aeilhyhjg Nsnu Stainless 300Kg hopper with twin screw discharge, 200mm screw diameter, 3Ph