BQX-2/1-3T Lifting Weight Limiter

BQX-2/1-3T lifting weight limiter is an intelligent crane protection device, BQX-3T, rate 1/2

BQX-2/1-3T Lifting Weight Limiter


BQX lifting weight limiter is an intelligent crane protection device, which is mainly used for overload protection of single beam hoist and other equipment. BQX lifting limiter is mainly composed of sensors, wire rope pressing device, control instruments, display instruments (optional) and other parts. Its installation and debugging is convenient, and it is with stable quality, small volume and beautiful appearance. The control instrument can be installed with the sensor or installed separately in other places such as the electric control box.

Main Technical Parameters

  1. Application: mainly used for 0.5T ~ 300t electric hoist and other lifting equipment.
  2. Action error: ± 5% (f · s)
  3. Display accuracy: ± 5% (f · s)
  4. Alarm point setting:

(1) Warning point, 90% of rated lifting capacity.

(2) Delay alarm point, 105% of rated lifting capacity.

(3) Immediately Alarm point, 130% of rated lifting capacity.

  1. Delay alarm time: 1 ~ 2 seconds
  2. Overload capacity of sensor: 1.5 times of rated lifting capacity
  3. Environmental conditions: – 10 ℃ ~ + 60 ℃, 90rh
  4. Power supply voltage: ~ 380V + 10% – 15% 50 Hz (other power supply voltages need to be noted)
  5. Relay contact capacity: ~ 250V, 10A
  6. Protection grade of sensor: IP65
  7. Protection grade of electrical control box: IP54

Working principle

To change the tension of the wire rope caused by the load on the lifting equipment, and then convert it into electrical signal by the side pressure sensor, and judge whether it is overloaded by the load relationship corresponding to the signal value.

The main control board part mainly calculates and judges the signal value, and gives the corresponding communication signal to the display part, which displays the weight. The control circuit is assembled on the main control board, and the acousto-optic indication is independently connected externally, so that users can connect the high-power acousto-optic alarm device.


No Model Sensor L B H H1 Wire Rope
1 BQX-2/1-1T BQX-1T 125 46 80 55 ø 6-12
2 BQX-2/1-2T
3 BQX-2/1-3T BQX-1.5T 140 62 100 58 ø 10-14
4 BQX-2/1-5T BQX-2.5T ø 12-18
5 BQX-2/1-10T BQX-5T 180 85 130 60 ø 18-26