Views: 0 Author: Site Editor Publish Time: 2026-09-07 Origin: Site
What is an overload protection device for a passenger hoist?
An overload protection device for a passenger hoist (also known as a construction hoist weight limiter) is a critical safety system designed to monitor the load weight in the lift cage. It prevents the hoist from operating when the load exceeds its safe working capacity, ensuring site safety and equipment protection.
Why is overload protection crucial for construction hoists?
Overload protection prevents serious construction site accidents, structural damage, motor burnout, and brake failures caused by excessive weight. By ensuring the lift cage operates strictly within weight limits, it extends equipment lifespan, maintains site compliance, and protects workers' lives.
How does a passenger hoist overload sensor work?
The overload pressure sensor is installed between the bottom surface of the lift cage and an additional steel plate. When loaded, the sensor measures mechanical weight strain and converts it into electrical signals. These signals pass through a transmission cable to the limiter unit, where an A/D converter and microcontroller process the data.
What happens when the weight limit is reached or exceeded?
When the total load reaches or exceeds the pre-set safety threshold, the limiter's internal relays trigger immediately. This cuts off power or sends a signal to the elevator control system, preventing the hoist from moving up or down until the excess load is removed.
Which passenger hoist brands are compatible with these overload limiters?
High-quality overload protection limiters are widely compatible with major construction hoist brands, including GJJ, BAODA, and other standard construction lift models.
What are the main components of a construction hoist overload limiter system?
A complete system typically consists of a weight sensor (load cell), a digital limiter display unit (with microcontroller and summing amplifier), connecting transmission cables, and relay control interfaces integrated into the lift cage control circuit.
How to choose the right overload protection device for your equipment?
When selecting an overload protector, ensure it matches your hoist model, cage load capacity, voltage requirements, and brand specifications (such as GJJ or BAODA). Always source from trusted construction spare parts manufacturers to guarantee high measurement precision, durable components, and reliable operation.
