Loher
Категория: Электродвигатели
Industrial motor Ex nA
Loher is using this motor type to increasingly address large oil & gas projects (in addition to the standard business) - for example the industrial plants located in the huge gas fields in Qatar. The reason for this is that also here the design allows the motor to be individually adapted to the particular application, so that even extremely complex customer specifications can be fulfilled without any deviations. Further, the advantages include the low motor weight and the extremely simply motor installation and maintenance. Loher Ex nA motors also have optimized parameters, i.e. the winding and rotor are optimally adapted to the environmental conditions. Only then can the optimum values for efficiency and power factor be achieved (without derating). The result is reflected in the energy saving with the lowest load on the line supply. A sensible investment for the future. These motors are available up to approx. 315 kW. In addition to the usual types of construction (where the shaft and flange is also in conformance with NEMA), non-standard numbers of poles, pole-changing versions, high-speed designs as well as special cooling types are available - precisely to customer specifications. Our strengths also include special voltages / special frequencies / special insulation / converter operation. Versions with special bearing designs for extremely high radial or axial (thrust) forces are especially worth noting.
Категория: Loher motors in Ex nA
Chemstar motor Ex nA
When compared to Ex nA industrial motors, this motor has been specifically developed for use in the chemical and petrochemical industry. This motor already fulfills the special requirements for this sector in the standard design. Further, even more individual and more precise adaptation is possible using practical options for applications in the chemical industry. A sector-specific design takes into account the requirements for use in hazardous Zone 2 applications. For instance, an extremely high quality paint finish and galvanized fan cowl protect against aggressive atmospheres. Anti-condensation heating is often no longer required - even for high levels of air humidity. Loher Chemstar motors operate perfectly from -55 °C up to +70 °C. When required, the motors can be equipped with corrosion-resistant stainless steel screws and bolts. Shaft seals in IP66 protect against water and dust. The degree of protection extends up to IP67.The enclosure is manufactured out of rugged gray cast iron and is therefore extremely resistant to corrosion, dampens vibration and has a high strength. Reinforced bearings and PTC thermistors - no problem. The adapted motors fulfill almost all user requirements and specifications. The Loher Chemstar Motor - guarantees maximum safety, highest availability and low operating costs.
Категория: Loher motors in Ex nA
Vario series Ex nA
The Vario Ex nA series has a welded steel enclosure for the highest degree of variability and versatility. Flange rings at the ends of the enclosure increase the torsional stiffness and ensure a vibration-proof mechanical design. The steel version allows various bearing concepts, dimensions can be adapted and a wide range of instruments can be mounted. The surface cooling using flat ribs combined with a defined inner cooling circuit with shaft-mounted fan inside the motor ensure optimum motor utilization. The copper bar rotors used as standard allow the starting and operating parameters to be optimized for each and every application.
Категория: Loher motors in Ex nA
J series Ex nA
J series from Loher have a modular cooling design featuring double-flow inner cooling for a high power density and a homogeneous temperature distribution.2 versions are available: Mounted air-water heat exchanger (JNWK–... type for roller bearings / JNXK-... for sleeve bearings): Optimum cooling is guaranteed specifically for these series due to the harmonized and coordinated heat exchanger. The motor power loss is dissipated through the cooling water and is therefore de-coupled from the ambient temperature. The heat exchangers are available in a wide variety of versions with single and double pipe types. The high quality heat exchanger materials used are adapted to the specific requirements. Mounted air-air heat exchanger (type JNRK–... for roller bearings / JNQK-... for sleeve bearings): The motors are equipped with air-air heat exchangers. The cooling pipes are manufactured out of galvanized steel; stainless steel versions are available for especially aggressive atmospheres.
Категория: Loher motors in Ex nA