About us

Shenyang Longdy Electrical Equipment Co., Ltd. was established in 2003, is specialized in auxiliary switch research and development, manufacturing, set stroke switch, micro switch research and development and manufacturing, precision mold design and manufacturing, precision stamping parts, plastic parts processing in one of the high-tech research and development, production enterprises.

PURPOSETo comply with truth · To work with morality
VISIONBuild excellent enterprises, build a hundred billion business circle, and help the northeast economy
MISSIONTo create a rich and happy life for employees, at the same time, to contribute to the development of customers and society.
SENSE OF WORTHActively love life and work, to be rigorous, honest, grateful, humble and altruistic.
Mold workshop

Mold division has advanced processing equipment and testing equipment. There are more than 100 sets of processing equipment, such as vertical machining center, CNC lathes, high-precision wire cutting, EDM, engraving machine, milling machine, grinding machine, high-speed punching machine, etc. There are more than 30 sets of testing equipment, such as coordinate measuring instrument X fluorescence coating thickness tester, salt spray testing machine, simple beam impact testing machine, 1T plastic tensile testing machine, etc., which can ensure the production and processing cycle and quality control of molds and products...

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Injection molding workshop

Shenyang Qingji Precision Molding Co., Ltd. is an independent business division of Longdy Electrical Appliances, established in 2010, specializing in the design and manufacturing of injection molds, die casting molds, rubber molds, injection products, die casting products, rubber products, mechanical processing, hardware products, stamping products production and sales. Plant construction area of 4500 square meters, more than 30 employees. Over the years, Qingji Molding has been focusing on the design, development and production of plastic mold sales, adhere to the purpose of quality, long-term for Volkswagen, Shenyang Broad, Switzerland ABB, Astak, Jinbo Johnson, South Korea Aige machinery and other well-known brand manufacturers to provide supporting molds and products...

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Assembly shop

The company has product independent research and development, design, production capabilities. Has developed, produced and assembled 27 series of auxiliary switches (FK series, FH series, FH1 series, FR series, FR1 series, FC series, FB series, FA series, S100 series, CWA series, C2 series, LXB series, LZ series, LAA series, LFZ series, LFD series, LFE series, LFF series and LFG series, etc.), more than 400 specifications. All electrical products are produced according to the national low-voltage electrical standard GB/T14048.5-2008 (equivalent to IEC60947-5-1), and have passed the type test of the National Machinery Industry low-voltage explosion-proof electrical products quality supervision and testing center or Shanghai Electrical Equipment Testing Institute....

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Electroplating workshop

Electroplating processing and manufacturing Department general description: the existing four production lines, respectively, alkaline galvanizing line, acid galvanizing line, rolling tin line, non-cyanide rolling silver line, 3 management personnel, 2 technical personnel, 27 production...

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Machine shop

The machine workshop has 4 bench drills, 4 CNC cars, 1 machine walking machine, 2 general cars, can process all kinds of machine parts, professional skills are strong, can process scattered parts and batch parts....

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Press shop

Our stamping workshop has 6 equipment, 80T one, 45T one, 25T three, 16T one, 6.3 tons one, can guarantee the quality and quantity of electronic connectors...

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Business Partner
News Information
Rainwater Immersion Alarm for Prefabricated Substations: Comprehensive Analysis of Float Switch Installation Standards

In the field of power facility protection, pre-assembled substations leverage their integrated and modular advantages for widespread application in urban distribution networks and industrial parks. However, these substations are predominantly located in outdoor environments, where the risk of rainwater inundation remains a critical threat to equipment safety—rainwater ingress can cause equipment short circuits and insulation failure at best, and trigger widespread power outages or even endanger maintenance personnel at worst. The rainwater immersion alarm system for pre-assembled substations serves as the core defense in fortifying safety barriers. Within this system, the installation specifications for microswitch float switches directly determine the alarm system's sensitivity and reliability, acting as the “key code” for ensuring stable substation operation.

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Decoding the Full Life Cycle Cost Accounting Model for High-Voltage Auxiliary Switches: Maximizing Equipment Value

Within the landscape of stable high-voltage power system operation, high-voltage auxiliary switches—often regarded as supporting players—carry out critical missions of signal transmission and circuit control. Their cost management directly impacts the long-term profitability of power projects. The lifecycle cost accounting model for high-voltage auxiliary switches serves as the core tool to unlock the “hidden cost trap” of equipment. Moving beyond the traditional focus solely on procurement prices, it adopts a holistic perspective spanning the entire lifecycle—from equipment inception to decommissioning—providing enterprises with scientific cost decision-making support. This model has become a crucial lever for cost reduction and efficiency enhancement in the power industry.

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Wind Turbine Tower Ladder Safety Guardrail: Micro Switch Gravity-Sensing Reset Mechanism Fortifies Lifeline for Aerial Operations

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