Crane Hoist Overload Limiter

Crane Hoist Overload Limiter

1. Early Warning function When the weight ≥90% (can be manually changed) rated load, the issue of low-frequency sound and light alarm. 2. Alarm protection When the weight of ≥100% (can be manually modified) rated load, the issue of high-frequency sound and light alarm, if the delay of a certain...

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Product Details

1. Early Warning function

When the weight ≥90% (can be manually changed) rated load, the issue of low-frequency sound and light alarm.

2. Alarm protection

When the weight of ≥100% (can be manually modified) rated load, the issue of high-frequency sound and light alarm, if the delay of a certain time (can be manually set), the alarm has not been eliminated, the automatic disconnect rising circuit, prohibit the lifting of action, while issuing continuous ringing alarm and alarm led high-frequency flashing.

3. Immediate protection

When the weight of ≥110% (can be manually changed) rated load, immediately disconnect the rising circuit, prohibit the lifting action, while issuing a sound alarm and alarm indicator light high-frequency flashing.

4. Phase Sequence Protection

When the three-phase power supply phase sequence error, the sound and light alarm, display the fault code, at the same time disconnect the total power control contacts and up circuit control contacts, prohibit all operations.

5. Lack of phase protection

A, when the device is connected to the power, if a phase or B phase is missing, the device does not work because there is no working power supply, string in the crane control loop in the device internal often open contact is in a disconnected state, so that the crane can not carry out the rise and fall operation, but silent light alarm and fault code display.

b, when the device is connected to the power supply, if the lack of C phase, then issued a sound and light alarm, display the fault code, while disconnecting the total power control contacts and rising circuit control contacts, prohibit all operations.

C, in the crane motor working process, when the detection of a phase current is zero, issued sound and light alarm, delay time (can manually set), display the fault code, while disconnecting the total power control contacts and rising circuit control contacts, prohibit all operations.

6. Short Circuit protection

When the motor of any one phase of the current ≥600% rated current, the sound and light alarm, if the last 0.8 seconds does not eliminate, then display the fault code, while disconnecting the total power control contacts and rising circuit control contacts, prohibit all operations.

7. Blocking protection

When the motor of any one phase of the current ≥400% rated current, issued sound and light alarm, if the start-up time is not eliminated, display the fault code, while disconnecting the total power control contacts and rising circuit control contacts, prohibit all operations.

8. Three-phase unbalanced protection

When any two-phase current difference ≥60%, the sound and light alarm, if the last 5 seconds does not eliminate, then display the fault code, at the same time disconnect the total power control contacts and up circuit control contacts, prohibit all operations.

9. Undervoltage Protection

When the three-phase power supply voltage is less than the value of the set, the sound and light alarm, if the last 5 seconds does not eliminate, then display the fault code, while disconnecting the total power control contacts and rising circuit control contacts, prohibit all operations.

10. Over-voltage protection When the three-phase power supply voltage value is greater than the overvoltage set, the sound and light alarm, if the last 5 seconds does not eliminate, then display the fault code, at the same time disconnect the total power control contacts and rising circuit control contacts, prohibit all operations.

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