When selecting European wire rope electric hoists, it is necessary to consider environmental conditions and electrical control requirements, and develop selection principles from four dimensions: environmental adaptability, electrical parameter matching, protection level, and safety redundancy design. The specific details are as follows:

1、 Environmental adaptability: Clarify the physical boundaries of the work environment

Temperature and humidity

Standard operating conditions: Priority should be given to models suitable for -20 ℃~+40 ℃ and relative humidity ≤ 85% (at 25 ℃). Such equipment uses temperature resistant motors and sealed bearings, which can cope with conventional industrial environments.

Extreme working conditions: If it is necessary to use in a low-temperature environment below -25 ℃, a model equipped with low-temperature grease and heating device should be selected; If the humidity remains above 85% for a long time, it is necessary to strengthen the sealing of the electrical cabinet to prevent short circuits caused by condensation water.

corrosive medium

Normal environment: Standard galvanized steel wire rope+painted shell can meet the requirements.

Chemical/Coastal Environment: 316 stainless steel wire rope and IP66 protection level electrical cabinet should be selected, and salt spray testing certification should be added.

Explosive risk

Explosion proof requirements: In flammable and explosive places (such as chemical workshops), explosion-proof models that meet the Exd Ⅱ CT4/tD A21 IP65 T130 ℃ standard must be selected, and their motors, switches, and junction boxes must all adopt explosion-proof structures.

2、 Electrical parameter matching: ensuring precise coordination between power and control

Power adaptability

Voltage/Frequency: 380V/50Hz three-phase electricity is commonly used in China, and it needs to be confirmed that the equipment supports this standard; If used for export projects, it needs to match specifications such as 400V/50Hz (Europe) or 460V/60Hz (North America).

Voltage fluctuation tolerance: Choose a model that allows ± 10% voltage fluctuation to avoid motor overheating caused by unstable power grid.

Control mode selection

Wired controller: Strong anti-interference ability, suitable for workshops with complex electromagnetic environments, but limited operating radius.

Wireless controller: requires regular code calibration and battery replacement, suitable for scenarios that require flexible movement (such as large warehouses).

Tablet remote control: Operated through the central control room screen, it can record operational data and is suitable for highly automated logistics centers.

Variable frequency drive demand

Precision assembly scenario: A frequency converter is required to achieve stepless speed regulation of 0.5-8m/min, reducing the shaking of the suspended object.

Energy saving requirements: Variable frequency models automatically reduce frequency during light loads, and have been tested to reduce energy consumption by 20% to 30%.

3、 Protection level: Building environmental isolation barriers

IP Protection Standards

Indoor dry environment: IP54 (dustproof and splash proof) is sufficient to meet the requirements.

Outdoor/humid environment: IP65 (dustproof and anti high-pressure water spray) is required, and the electrical cabinet needs to add drainage holes and breathing valves.

Explosion proof scenario: IP66 (dust and strong water spray prevention) is a mandatory standard.

anti-corrosion treatment

Surface treatment: Low chromium coating or hot-dip galvanizing process is preferred, and dismantling when scrapped is more environmentally friendly.

Sealing design: Check if the electrical cabinet door gap is ≤ 3mm to prevent corrosive gases from entering.

4、 Security redundancy design: building a multi-level protection system

Redundancy of braking system

Dual brakes: The main brake (electromagnetic brake) and the auxiliary brake (mechanical brake) need to be independently powered to ensure that a single fault does not cause the suspended object to fall.

Brake pad thickness: Regularly check, and replace if the remaining thickness is less than 3mm.

Limiting and protective devices

Lifting limit: Adopting encoder+mechanical limit dual protection, with an error of ≤ 5mm.

Overload protection: Real time monitoring through pressure sensors, automatic shutdown when overloaded by 10%.

Cable protection: Equipped with an angle sensor, it triggers an alarm and shuts down when the cable angle exceeds 3 °.

Electrical safety

Emergency stop button: It must comply with ISO 13850 standard and have a response time of less than 0.3 seconds.

Insulation resistance: Regularly check the insulation resistance of the motor winding to ground, which should be greater than 1M Ω.

Grounding protection: Grounding resistance ≤ 4 Ω to prevent electric shock accidents.

5、 Selection process: closed-loop management from requirement analysis to verification

Requirement analysis: Clarify the maximum lifting capacity, lifting height, working level (M3~M8), and frequency of use.

Environmental assessment: Determine whether special functions such as explosion prevention, corrosion prevention, high temperature, and low clearance are required.

Parameter matching: Select models based on voltage, control mode, and speed requirements.

Supplier review: Select suppliers that provide cloud platform monitoring and spare parts inventory management services.

On site verification: Conduct 125% static load test and dynamic load test after installation to ensure performance meets standards.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment