BCQ-D3 Three in one weight limiterDetailed product description：

The main features of the BCQ-D3 three in one weight limiter are:

Due to the unique software design of digital sensors and controllers, this device has strong anti-interference ability;
In order to eliminate the impact of changes caused by long-term operation of sensors, this device adopts zero point automatic tracking memory technology to ensure the accuracy of weighing;
The lifting height of the 3-limiter adopts the most advanced infrared probe internationally. When the hook reaches a certain height, the power supply of the lifting contactor is automatically cut off;
When the angle sensor determines that the central column is tilted by 14 degrees, a pulse signal is emitted to drive the relay to operate and cut off the power supply of the rising contactor.
In order to facilitate installation, each component of this device has been calibrated with precision instruments according to technical standards in the factory, and generally does not require debugging during on-site installation (see Installation and Debugging section);
In order to facilitate accurate display of weighing values, the limiter adopts software adjustment memory technology, which is convenient and intuitive to adjust, and the after-sales service and on-site maintenance are convenient and reliable.

Technical specifications of BCQ-D3 three in one weight limiter:

1 . Scope of use: Various specifications of electric hoists, wire rope direct hoists, and other single beam cranes ranging from 0.5T to 50T;
2 . System error: ≤ 5% F · S
3. Alarm method: Sound and light alarm;
⑴ Pre alarm point: When the lifting weight reaches 90% of the rated lifting capacity, an intermittent alarm sound will be emitted,
⑵ Rated value alarm: When the lifting weight reaches 100% of the rated lifting weight, an intermittent alarm sound will be emitted again“
⑶ Immediate alarm: When the lifting weight reaches 105% of the rated lifting weight, a continuous alarm sound will be emitted, and the lifting control power of the crane will be automatically cut off, while the lifting weight will be displayed;
4 . Static strength of sensor: The static strength of the sensor is 1.5 times the rated load;
5 . Working temperature: -20 ℃ -+60 ℃;
6 . Relative temperature: 20% -95%
7 . Power supply voltage: AC220V, AC380V, 50HZ, power consumption 5W or according to user requirements;
8 . Contact capacity of circuit breaker: The contact capacity of circuit breaker is AC380V, 5A;
9 . Voltage resistance of the controller: 2000V;
10. Display mode: A single four digit high brightness LED (red) displays the lifting weight as a number, with automatic decimal point switching.

Working Principle:

The weight of the heavy object lifted by the lifting machinery is detected by a resistance strain sensor, and the physical weight is linearized and converted into an analog electrical signal, which is amplified by an amplifier and then converted into a digital signal through A/D conversion. The input is processed by the microcontroller and sent to the digital display screen for display. At the same time, the microcontroller compares the measured weight with the preset rated load. When the weight of the heavy object reaches the rated load, the limiter emits an alarm sound to remind the staff to pay attention. Finally, when the immediate alarm point is reached, in addition to emitting a continuous alarm sound, the relay inside the limiter acts to immediately cut off the lifting power supply of the crane, but it does not affect the action of other mechanisms to achieve load protection.