Data from China Customs shows that Laos imported gantry cranes from China worth US$274,000 in 2021, compared with US$279,000 in 2020. In terms of import quantity, Laos will import 5 sets of gantry cranes from China in 2021, with an average import unit price of US$54,800. In 2020, Laos will import a total of 7 sets of gantry cranes from China, with an average import unit price of US$39,800. In terms of import quantity, the gantry crane market in Laos is a little small for Chinese crane suppliers, and the difference in the average import unit price has no special guiding significance. The parameters such as the lifting weight, span, and lifting height of the gantry crane will greatly affect the final import price. As an Asian country, Chinese crane suppliers can effectively provide Lao customers with gantry cranes with advanced quality, reliability and performance.
As an excellent crane supplier in China, Dongqi Crane has many years of crane service experience in Laos, and can independently complete the installation and service of gantry cranes in Laos. For the complex working environment, Dongqi Crane has developed a variety of different types of gantry cranes, which can provide customers with customized gantry cranes. In order to help Lao customers better understand our products, this article will introduce the working characteristics and technical parameters of different types of gantry cranes one by one. If you are interested in our products, you can click here to contact us, or tell us by Email: sales010@cranesdq.com
Portable Gantry Crane Sold To Laos Price
Gantry Crane
Span(m)
Lifting Height(m)
Power Supply(V)
Price(USD)
0.25 ton
2~12
1~9
220-480/3/50
$900~9000
0.5 ton
2~12
1~9
220-480/3/50
$1200~12000
1 ton
2~12
1~9
220-480/3/50
$1500~15000
2 ton
2~12
1~9
220-480/3/50
$2000~20000
3 ton
2~12
1~9
220-480/3/50
$3000~30000
5 ton
2~12
1~9
220-480/3/50
$4500~46000
10 ton
2~12
1~9
220-480/3/50
$7000~65000
The price of the above gantry gantry cranes will change with the market, without further notice, for reference only. If you need an accurate price in the near future, please contact us.
The price of the above gantry gantry cranes will change with the market, without further notice, for reference only. If you need an accurate price in the near future, please contact us.
The price of the above gantry cranes will change with the market, without further notice, for reference only. If you need an accurate price in the near future, please contact us.
Types of gantry cranes provided by Dongqi Crane for Laos
Single Girder Gantry Crane for Laos
Single girder Gantry crane is a regular crane widely used in open ground and warehouses for loading and unloading materials.
Features:
Overload protective device to prevent hoisting of loads exceeding its rated capacity
Limit switch to prevent overhoisting and overlowering
2 step Limit switch to prevent overtransversing and overtravelling
Safety latch on the hook
Audible signaling device which activates when the crane moves
Rotating light which activates when the crane moves
Flexible flat cable festoon system for cross travel power supply and mobile control along the crane bridge
Push buttons pendant complete with control cable and moveable terminal box
Single-beam gantry cranes have a wide range of application value in many fields such as industrial production and logistics transportation due to their high site utilization rate, large operating range, wide adaptability and strong versatility. Combined with the working characteristics of single-beam gantry cranes, the following is an analysis of their application fields in Laos:
1. Working characteristics of single-beam gantry cranes
Unique structure:
The metal structure of the single-beam gantry crane is like a door-shaped frame. Two legs are installed under the main beam, which can walk directly on the ground track. Both ends of the main beam can also have an outward cantilever beam.
Efficient use of the site:
Its compact structure can efficiently utilize the site space, and is particularly suitable for loading and unloading bulk cargo in outdoor cargo yards and material yards.
Wide operating range:
The single-beam gantry crane has a large operating range and can meet the needs of operations of different scales.
Strong adaptability:
The crane can adapt to a variety of working environments and operating conditions, including high temperature, low temperature, humid or dusty environments.
Strong versatility:
Single-beam gantry cranes can be used to transport various finished items and bulk materials, with a lifting capacity of less than 100 tons and a span of 4 to 39 meters (or more), which has wide versatility.
2. Application areas of single-beam gantry cranes in Laos
Ports and docks:
In ports and docks in Laos, single-beam gantry cranes can be used to load and unload containers, bulk cargo and other goods. Its compact structure and large operating range enable the crane to efficiently complete the loading and unloading of goods in the narrow port space.
Manufacturing:
In the manufacturing industry, single-beam gantry cranes can be used for material handling on production lines, workpiece lifting beside assembly lines, and cargo storage and material retrieval in warehouses. Especially in industries such as automobile manufacturing, machinery manufacturing, and electronic manufacturing, the efficient and accurate handling capacity of single-beam gantry cranes plays an important role in improving production efficiency and reducing labor intensity.
Logistics warehousing:
In the field of logistics warehousing, single-beam gantry cranes are key equipment for rapid storage and transfer of goods. It can easily stack goods from the ground to the shelves, or take goods from the shelves for sorting and packaging. In addition, in places such as container terminals and railway freight stations, single-beam gantry cranes also play an important role to ensure the smooth and efficient logistics process.
Construction industry:
On construction sites, single-beam gantry cranes are often used for the lifting and handling of building materials, such as steel bars, prefabricated components, etc. Its flexible operability and powerful lifting capacity enable construction workers to efficiently complete various lifting tasks and improve construction progress and safety.
Energy and environmental protection fields:
In energy and environmental protection fields such as electricity, metallurgy, and chemical industry, single-beam gantry cranes also play an indispensable role. It can be used to lift and carry heavy equipment, pipelines, storage tanks and other items to support the production and maintenance work of these industries.
Other fields:
In addition to the above fields, single-beam gantry cranes are also widely used in aerospace, shipbuilding, petrochemical, food processing and other industries. In these fields, single-beam gantry cranes provide strong support for the optimization of production processes and the improvement of efficiency with their unique advantages.
In summary, single-beam gantry cranes are widely used in ports and docks, manufacturing, logistics warehousing, construction, energy and environmental protection and many other industries in Laos. Its compact structure, large operating range, strong adaptability and versatility enable the crane to play an important role in these fields and improve production efficiency and processing efficiency.
Double girder Gantry crane is suitable for outdoor warehouses, yards and port terminals to lift materials.
Features:
Overload protective device to prevent hoisting of loads exceeding its rated capacity
Limit switch to prevent overhoisting and overlowering
2 step Limit switch to prevent overtransversing and overtravelling
Safety latch on the hook
audible signaling device which activates when the crane moves
rotating light which activates when the crane moves
Flexible flat cable festoon system for cross travel power supply and for mobile control along the crane bridge
Push buttons pendant complete with control cable and moveable terminal box
The double-girder gantry crane is a kind of heavy-duty mechanical equipment. With its strong carrying capacity, stable operation, and wide operating range, it has extensive application value in many fields such as industrial production and logistics transportation. Combined with the working characteristics of double-girder gantry cranes, the following is an analysis of its main application areas in Laos:
1. Working characteristics of double-girder gantry crane
Strong carrying capacity:
The double-girder gantry crane adopts a double-main girder structure, which significantly increases the load-bearing capacity and can lift heavy goods and large equipment.
Running smoothly:
The crane is equipped with advanced drive and control systems to achieve smooth lifting and handling operations and reduce cargo damage and vibration.
Wide scope of work:
Double-girder gantry cranes have large spans and lifting heights, and can meet the needs of operations of different scales and heights.
Adaptable:
The crane can adapt to a variety of working environments and operating conditions, including high and low temperatures, humidity or dusty environments.
Compact structure:
Although the double-beam structure is relatively complex, the overall design is compact, which can make full use of the site space and improve operating efficiency.
2. Main application areas of double-girder gantry cranes in Laos
Ports and terminals:
In ports and terminals in Laos, double-girder gantry cranes are important equipment for container handling and stacking operations. It can efficiently complete container lifting, handling and stacking operations, improving the operational efficiency of ports and terminals.
Manufacturing:
In the manufacturing industry, double-girder gantry cranes are used for the handling, assembly and warehousing of large equipment and heavy workpieces. Especially in automobile manufacturing, machinery manufacturing, aerospace and other industries, double-girder gantry cranes can easily cope with the handling needs of heavy goods and improve the flexibility and efficiency of the production line.
Logistics and warehousing:
In the field of logistics and warehousing, double-girder gantry cranes are key equipment for rapid access and transfer of goods. It can quickly remove goods from shelves or yards, sort, pack and ship. At the same time, double-girder gantry cranes can also help warehouse managers better manage inventory and improve warehousing efficiency.
Construction industry:
On construction sites, double-girder gantry cranes are often used for hoisting large components and building materials. It can efficiently lift heavy materials such as steel bars and prefabricated components to designated locations to support the smooth progress of building construction.
Energy and Minerals:
In the energy and mining sectors, double-girder gantry cranes are used for the installation, maintenance and overhaul of heavy equipment. Especially in the mining and petrochemical industries, double-girder gantry cranes can cope with complex working environments and high-intensity operating requirements.
Other areas:
In addition to the above fields, double-girder gantry cranes are also widely used in aerospace, shipbuilding, paper and printing and other industries. In these fields, double-girder gantry cranes provide strong support for the optimization of production processes and improvement of efficiency with their unique advantages.
To sum up, double-girder gantry cranes are widely used in Laos' ports and terminals, manufacturing, logistics and warehousing, construction industry, energy and minerals, and many other industries. Its strong carrying capacity, smooth operation, and wide operating range allow cranes to play an important role in these fields and improve production efficiency and processing efficiency.
A Semi Gantry Single/Double Girder crane is used in applications such as a tool room where part utilization of the bay is required, or in outdoor sites where a gantry rail can be installed beside an existing structure.
Features:
Overload protective device to prevent hoisting of loads exceeding its rated capacity
Limit switch to prevent overhoisting and overlowering
2 step Limit switch to prevent overtransversing and overtravelling
Safety Latch on the hook
Audible signaling device which activates when the crane moves
Rotating light which activates when the crane moves
Flexible flat cable festoon system for cross travel power supply and for mobile control along the crane bridge
Push buttons pendant complete with control cable and moveable terminal box
Semi-gantry crane, also known as semi-gantry crane, is a kind of lifting equipment between gantry crane and cantilever crane, with unique structure and application scenarios. Combined with the working characteristics of semi-gantry crane, the following is an analysis of its main application areas in Laos:
1. Working characteristics of semi-gantry crane
Strong carrying capacity:
Semi-gantry crane has strong carrying capacity and can meet the lifting and transportation needs of large items.
Simple and stable structure:
It is mainly composed of boom, lifting mechanism, walking mechanism and other parts. The boom usually adopts steel structure, which has strong carrying capacity and stability.
Strong adaptability:
Semi-gantry crane can adapt to the requirements of different places and has a wide range of applications. Whether indoors or outdoors, it can play a good lifting effect.
Flexible operation:
Semi-gantry crane has horizontal handling and vertical lifting functions, flexible operation, and can meet a variety of operation needs.
High space utilization:
Semi-gantry crane occupies a small area and is suitable for places with limited space, such as factories, workshops, etc.
2. Main application areas of semi-gantry cranes in Laos
Ports and docks:
In Laos' ports and docks, semi-gantry cranes are often used for loading and unloading of containers and bulk cargo. Its powerful lifting capacity and flexible operability enable it to efficiently complete the handling and stacking of goods.
Manufacturing industry:
In the manufacturing industry, semi-gantry cranes are widely used for material handling in factories and workshops, lifting of workpieces beside assembly lines, and storage and retrieval of goods in warehouses. It can improve production efficiency, reduce labor intensity, and provide strong support for the development of the manufacturing industry.
Logistics and warehousing:
In the field of logistics and warehousing, semi-gantry cranes are key equipment for rapid storage and transfer of goods. It can easily remove goods from shelves or yards for sorting, packaging and delivery. At the same time, semi-gantry cranes can also help warehouse managers better manage inventory and improve storage efficiency.
Construction industry:
On construction sites, semi-gantry cranes are often used for lifting and handling of building materials. It can quickly and accurately lift heavy materials such as steel bars and prefabricated components to designated locations, supporting the smooth progress of construction.
Energy and Minerals:
Semi-gantry cranes also play an important role in the energy and minerals sector. They are often used in material handling, equipment assembly, and the construction and maintenance of energy facilities in mining. The strong lifting capacity and adaptability of semi-gantry cranes enable them to cope with complex working environments and high-intensity operating requirements.
In summary, semi-gantry cranes are widely used in ports and docks, manufacturing, logistics warehousing, construction, energy and minerals in Laos. Its strong carrying capacity, simple and stable structure, strong adaptability, flexible operation and high space utilization enable semi-gantry cranes to play an important role in these fields and provide strong support for Laos' economic development.
A-frame gantry cranes, also known as A-frame cranes or light duty gantry cranes are suitable for a range of applications. Typically these are small portal gantry cranes for lighter duty lifting requirements. Fitted with the heavy duty castor wheels, the cranes can be effortlessly moved around the workplace and locked in place when required. These cranes are ideal for assembly lines, workshops, service bays and temporary locations.
Features:
Swivel castor wheel with brakes
Overload protective device
Limit switch to prevent overhoisting and overlowering
Safety catch on the hook
IP 54 protection for all motors
Push button pendant complete with control cable
Flexible flat festoon cable system for cross travel power supply
A-type gantry crane, with its unique structure and powerful functions, has a wide range of application value in many fields such as industrial production and logistics transportation. Combined with the working characteristics of A-type gantry crane, the following is an analysis of its main application areas in Laos:
1. Working characteristics of A-type gantry crane
Unique structure:
A-type gantry crane adopts box-shaped double-beam welded structure, which is strong and stable and can withstand large lifting loads.
Strong carrying capacity:
The crane has a strong lifting capacity, can meet the lifting and transportation needs of large items, and is suitable for loading and unloading of heavy goods.
Large operating range:
A-type gantry crane has a large span and lifting height, can cover a wider operating area, and meet the operating needs of different scales and heights.
Flexible operation:
The driver's cab has a wide field of view and a built-in linkage control console, making the operation more flexible, stable and comfortable. At the same time, the crane can also be equipped with a variety of special lifting tools according to user needs, such as electromagnetic suction cups, grabs, etc., for special operations.
Strong adaptability:
A-type gantry cranes can adapt to a variety of working environments and operating conditions, including high temperature, low temperature, humid or dusty environments, and have strong environmental adaptability.
2. The main application areas of A-type gantry cranes in Laos
Ports and docks:
In Laos' ports and docks, A-type gantry cranes are important equipment for container loading and unloading and stacking operations. It can efficiently complete the lifting, handling and stacking of containers, and improve the operating efficiency of ports and docks.
Manufacturing:
In the manufacturing field, A-type gantry cranes are widely used in material handling in factories and workshops, workpiece lifting beside assembly lines, and cargo storage and retrieval in warehouses. Especially in industries such as automobile manufacturing, machinery manufacturing, and aerospace, A-type gantry cranes can easily cope with the handling needs of heavy goods and improve the flexibility and efficiency of production lines.
Logistics warehousing:
In the field of logistics warehousing, A-type gantry cranes are key equipment for rapid storage and transfer of goods. It can quickly take goods off shelves or yards for sorting, packaging and delivery. At the same time, A-type gantry cranes can also help warehouse managers better manage inventory and improve storage efficiency.
Construction industry:
On construction sites, A-type gantry cranes are often used for hoisting and handling of building materials. It can quickly and accurately lift heavy materials such as steel bars and prefabricated components to designated locations to support the smooth progress of construction. Especially in large-scale construction projects, the lifting capacity and operating range of A-type gantry cranes can meet the needs of complex construction environments.
Energy and Minerals:
In the field of energy and minerals, A-type gantry cranes also play an important role. It is often used for material handling, equipment assembly, and construction and maintenance of energy facilities in mining. The strong lifting capacity and adaptability of A-type gantry cranes enable it to cope with complex working environments and high-intensity operating requirements.
Other fields:
In addition to the above fields, A-type gantry cranes are also widely used in papermaking, chemical industry, food processing and other industries. In these fields, A-type gantry cranes provide strong support for the optimization of production processes and the improvement of efficiency with their unique advantages.
In summary, A-type gantry cranes are widely used in ports and docks, manufacturing, logistics warehousing, construction, energy and mining, and many other industries in Laos. Its unique structure, strong load-bearing capacity, large operating range, flexible operation, and strong adaptability enable A-type gantry cranes to play an important role in these fields and provide strong support for Laos' economic development.
Simple mobile gantry crane is manufactured for lifting equipment, loading and unloading of the warehouse, maintaining heavy-duty equipment and transporting materials, applicable for small and medium factory. The best advantage of the crane is omni-directional movability, fast to assembly, small volume, can be moved to another are only with a minicar. Capacity is 0.25t-10t, span is 12m. Brake bearing universal wheel can move on the ground, be used together with electric hoist, chain block, monorail trolley, realizing crane mechanization, which can reduce the human power,production costs, and improve work efficiency.
Portable gantry cranes, with their lightweight, high strength, easy installation and operation, and strong environmental adaptability, have shown great application potential in many fields. Combined with the working characteristics of portable gantry cranes, the following is a detailed analysis of their main applications in Laos:
1. Working characteristics of portable gantry cranes
Lightweight design:
The use of advanced high-strength aluminum alloy profiles greatly reduces the weight of the equipment while ensuring good load-bearing capacity and structural stability.
High strength and stability:
Although the equipment is light, the carefully optimized design enables the gantry crane to maintain reliable performance under various working conditions.
Easy to install and operate:
No complex professional tools and equipment are required, and the installation can be completed manually, which greatly saves installation time and labor costs. At the same time, the operation interface is simple and intuitive, in line with ergonomic principles, and operators can easily get started.
Strong environmental adaptability:
It has good corrosion resistance and can operate stably in harsh chemical environments and humid environments. In addition, its easy-to-clean characteristics also make it useful in places with high hygiene requirements, such as food processing and pharmaceutical manufacturing industries.
Adjustable height and span:
The height and span can be flexibly adjusted to adapt to different sites and operating requirements, whether it is a small space or a large workshop, it can be easily handled.
Efficient load:
The load capacity can reach a certain level (such as 5000KG), which is enough to cope with most material transportation tasks and provide strong guarantee for the efficient production of the enterprise.
Economical and practical:
The manual movement method is flexible and convenient, and the operator can quickly move the gantry crane to the designated position to improve the operating efficiency. At the same time, the bolt connection is adopted, which is convenient for disassembly and assembly, does not take up too much space during storage, is convenient for transportation, reduces transportation costs, and further improves the comprehensive cost performance of the equipment.
2. The main application of portable gantry cranes in Laos
Manufacturing:
In automobile manufacturing plants, portable gantry cranes can be used to lift parts and body frames to improve the material flow efficiency of production lines.
In machining workshops, assist in the handling of heavy machine tools and processed parts to optimize production layout.
Warehousing and logistics:
In warehouses, portable gantry cranes can quickly lift goods for loading and unloading and stacking, improving the utilization rate of storage space.
In the logistics distribution center, assist in the sorting and handling of goods and speed up the logistics turnover.
Construction:
Lifting construction materials and construction equipment to facilitate the transportation of materials at the construction site. The lightweight design and high flexibility of the portable gantry crane enable it to operate flexibly in a small construction space.
Maintenance and overhaul:
In the overhaul and maintenance operations such as urban municipal management, water supply, and power supply, portable gantry cranes can be used to lift and install equipment and tools required for maintenance.
Other fields:
Portable gantry cranes are also suitable for heavy industrial production sites such as ports and mines, as well as places that require frequent movement and flexible operations.
In summary, portable gantry cranes play an important role in many fields such as manufacturing, warehousing and logistics, and construction in Laos with their unique working characteristics and advantages. With the continuous advancement of technology and the continuous growth of market demand, portable gantry cranes will play a more important role in the industrial development of Laos.
The electric trolley gantry crane is a mid –light type gantry crane, equipped with electric and crane hooks, with the obvious features of “ L” shape legs, which makes the crane more convenient for handling cargo with long length, such as, steel pipe, etc. The lifting capacity of the electric trolley gantry crane is 5 to 32 ton and working class is A5 and A6. The parameters are as following:
Product Type
L
Lifting Capacity
5~32t
Span Length
18~35m
Working Class
A5, A6
Ambient Temperature
-25~40℃
The L-shaped electric trolley gantry crane, with its unique L-shaped support leg design, electric drive mode and trolley operation flexibility, has shown significant application advantages in many fields such as industrial production and logistics transportation. Combined with the working characteristics of the L-type electric trolley gantry crane, the following is an analysis of its main application areas in Laos:
1. Working characteristics of L-shaped electric trolley gantry crane
Unique L-shaped support leg design:
The L-shaped support legs provide stable support for the crane and increase the lifting space, allowing the crane to easily cross obstacles and transfer objects from within the span to under the cantilever.
Electric drive mode:
Using electric drive, it has the characteristics of high efficiency, energy saving and environmental protection. At the same time, the electric drive mode also improves the crane's operational flexibility and precision, allowing the crane to easily cope with various complex operating environments.
Car operation flexibility:
The trolley on the crane can run along the lower flange of the main beam I-beam, providing a high degree of operational flexibility. This allows the crane to easily complete various lifting and handling tasks and improve operating efficiency.
Strong and durable construction:
The L-shaped electric trolley gantry crane is made of high-quality materials, with a sturdy and durable structure. It can withstand larger lifting loads and ensure safety and stability during operation.
Adaptable:
The crane can adapt to a variety of working environments and operating conditions, including high and low temperatures, humid or dusty environments, etc. It has strong environmental adaptability and can maintain stable performance under various harsh conditions.
2. Main application fields of L-shaped electric trolley gantry crane in Laos
Manufacturing:
In industries such as automobile manufacturing and machinery manufacturing, L-shaped electric trolley gantry cranes can be used to lift parts, lift workpieces next to assembly lines, and store and retrieve goods in warehouses. Its unique L-shaped support leg design and electric drive method allow the crane to easily cope with various complex operating environments and improve the flexibility and efficiency of the production line.
Warehousing and Logistics:
In warehouses, L-shaped electric trolley gantry cranes can be used for loading, unloading, stacking and sorting of goods. Its trolley operation flexibility and electric drive mode enable the crane to quickly and accurately complete various lifting and handling tasks, improving storage space utilization and logistics turnover speed.
Building construction:
In construction, L-shaped electric trolley gantry crane can be used to lift building materials and construction equipment. Its structure is strong and durable and can withstand large lifting loads, ensuring safety and stability during construction. At the same time, its unique L-shaped support leg design also increases the lifting space, allowing the crane to easily cope with various complex construction environments.
Ports and terminals:
In ports and terminals, L-shaped electric trolley gantry cranes can be used for container loading, unloading and stacking operations. Its electric drive mode and high efficiency and energy saving characteristics enable the crane to quickly and accurately complete various lifting and handling tasks, improving the operational efficiency of ports and terminals.
Other areas:
In addition to the above fields, the L-shaped electric trolley gantry crane can also be used in papermaking, chemical industry, food processing and other industries. In these industries, the L-shaped electric trolley gantry crane provides strong support for the optimization of production processes and improvement of efficiency with its unique advantages.
To sum up, the L-shaped electric trolley gantry crane plays an important role in Laos' manufacturing, warehousing and logistics, construction, ports and terminals and other fields with its unique working characteristics and advantages. With the continuous advancement of technology and the continued growth of market demand, L-shaped electric trolley gantry cranes will play a more important role in the industrial development of Laos.
Different types of gantry cranes sold from China to Laos
0.5t Mobile Gantry Crane with Attractive Design for sale to Laos
Lifting weight: 0.5 tons
Lifting height: 3 meters
Span: 5 meters
Working voltage: 380/3/50
Semi-Gantry Crane with Electric Hoist Single Leg for sale to Laos
Lifting weight: 5 tons
Lifting height: 8 meters
Span: 10 meters
Working voltage: 380/3/50
Mg Double Girder Gantry Crane with Electric Hoist for sale to Laos
Lifting weight: 50 tons
Lifting height: 18 meters
Span: 25 meters
Working voltage: 380/3/50
Double Girder Rail Mounted Container Gantry Crane for sale to Laos
Lifting weight: 20 tons
Lifting height: 8 meters
Span: 10 meters
Working voltage: 380/3/50
L Type Single Beam Girder Single Leg Gantry Crane for sale to Laos
Lifting weight: 10 tons
Lifting height: 6 meters
Span: 15 meters
Working voltage: 380/3/50
How to customize gantry crane from China
We are a crane manufacturer located in China, providing crane customization services to global crane customers. If you want to customize a gantry crane, you can leave a message on the website or Email: sales010@cranesdq.com, tell us the following information, and our sales manager will contact you:
Lifting capacity (ton): __ ?( The rated capacity)
Lifting height (m):__ ? (Height from hook center to the floor)
Span (m): __ ? (Distance between rail center)
Lifting speed (m/min): __ ? ( Single, Dual, Variable)
Traveling distance (m): __ ? (The length of the rail)
Work duty: __ ? (How many hours a day? How many times an hour?)
What material to be lifted: __ ?
Industrial voltage: __ ? ( like :380V, 50Hz, 3ph )