Part 4: Standardized Installation, Commissioning, and Acceptance Procedures for Electric Hoists
Electric hoists are classified as special equipment; the quality of their installation and commissioning directly determines operational stability, safety, and service life. Improper installation and inadequate commissioning are primary causes of issues such as track deviation, abnormal noise, load slippage, limit switch failure, and structural wear. In accordance with standards GB 6067.1-2010 and JB/T 9008-2021, the installation, commissioning, and acceptance of electric hoists must follow standardized procedures applicable to various setups, including I-beam tracks, KBK tracks, jib cranes, and fixed mounts. This article outlines the technical specifications for the entire standardized process—covering construction, commissioning, and acceptance—to ensure the equipment is put into service in compliance with regulations.
Preliminary preparation and foundation verification are critical initial steps. Before installation, it is essential to verify the equipment model, load parameters, track specifications, and the completeness of accessories to ensure compatibility with on-site operating conditions. For I-beam track installations, the track model, flatness, straightness, and wear status must be inspected; the track surface must be free of burrs, deformation, and severe wear, while the verticality of the web and the flatness of the flanges must meet standards. Installing a hoist on a track with deformation or excessive wear is strictly prohibited. The track span and load-bearing capacity must meet the equipment's rated load requirements, and the mounting structure must be free of looseness, corrosion, or structural defects. Additionally, the compatibility between the hoist's travel wheels and the track must be checked; the wheel gauge and width must match the track model to prevent jamming or deviation. The installation environment must be clean and dry, with the electrical installation area free of flammable or explosive debris; for outdoor operations, waterproof and dustproof protective accessories must be prepared in advance.
The installation of the main unit follows the principles of "mechanical assembly first, electrical installation second, precise alignment, and secure fastening." First, the travel wheel assembly is completed by precisely fitting the travel wheels onto the track flanges. The wheel clearance is then adjusted to ensure uniform contact between the wheels and the track—avoiding uneven wear or jamming—and to keep the wheel gauge deviation within ±1 mm. Next, the main structural components—such as the hoist unit, drum, and chain container—are secured in place. High-strength, tamper-resistant bolts are used for all connections, tightened evenly in a diagonal pattern and fitted with anti-loosening washers to prevent loosening or misalignment during long-term operation. Once the mechanical installation is complete, the electrical system is installed, involving the routing of power, control, and pendant cables. Wiring is arranged neatly without tension, pinching, or damage; terminals are securely crimped, and insulation is properly applied. Grounding is a mandatory procedure; the grounding resistance must be ≤4Ω to eliminate electrical leakage hazards. The electrical system's protection rating must meet site conditions: at least IP54 for indoor use and at least IP65 for outdoor or humid environments.
Commissioning of the entire unit comprises three main modules: no-load testing, incremental load testing, and safety function testing; all procedures must be fully documented and archived. No-load testing involves operating the unit without a load to repeatedly test all movements—lifting, lowering, and lateral travel—while checking for smooth operation, abnormal noises, sticking, or misalignment. Braking responsiveness and the smoothness of starting and stopping are verified, and checks are performed for issues such as mechanical interference, loose wiring connections, or wheel misalignment. Following successful no-load testing, incremental load testing is conducted at 50%, 75%, and 100% of the rated load. Each load level is maintained for at least 20 minutes to observe structural stress, transmission stability, and braking performance; the unit passes if there is no slippage, deformation, or abnormal vibration during full-load operation. For heavy-duty models, a short-term overload test at 1.25 times the rated load is additionally required to verify ultimate load-bearing capacity and braking stability; the unit meets standards if there is no hook slippage or structural deformation.
Specialized safety function testing is a critical stage of acceptance, focusing on verifying the effectiveness of the up/down travel limits, emergency stop button, overload protection, and anti-detachment devices. Limit switches are manually triggered to confirm that the equipment cuts power and stops instantly without over-travel; the emergency stop button is triggered to ensure all movements lock immediately; and overload simulation tests confirm the equipment automatically cuts power and prevents lifting operations. Once all commissioning items have passed inspection, a comprehensive acceptance check of the complete unit is conducted to verify mechanical assembly precision, electrical safety performance, the effectiveness of safety devices, and operational stability. A complete set of documentation—including installation drawings, commissioning records, equipment certificates of conformity, and inspection reports—is compiled, and equipment registration and filing are completed. The equipment may only be put into formal production operation after passing acceptance; the use of equipment that has not undergone acceptance or failed commissioning is strictly prohibited.
