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E-Mail: sales@ctechmachinery.com.my
Address: 30, Jalan Anggerik Oncidium 31/71, Kota Kemuning, 40460 Shah Alam, Selangor, Malaysia
Overload protecting device
Keyword:
Overload protecting device
Classification:
Product Details
Overview
Overhead crane overload protection device (or overload limiter) is a safety system that monitors the lifting load to prevent overhead crane from exceeding its rated capacity, thereby protecting the equipment from damage.
CTECH Machinery Sdn Bhd specially produces the slip clutch mechanism, as one of functional chain hoist overload protective devices.
Main types
*Electronic overload protection: high-accuracy load cells or force transducers
*Electromechanical devices: Dillon switches or stacks of Belleville washers
*Mechanical slip clutches: device for chain hoists
*Load Moment Indicators: prevent operation beyond safe parameter
Prominent features
1) Enhanced safety
2) Strong overload protection
3) Increased efficiency
4) Can be readily retrofitted
Functional work
*Friction mechanism: Bellville washer
*Torque absorption: Belleville washer with controlled slip force
*Overload protection of hoist: Belleville washers of non-linear load-deflection
Material adopted
Carbon steel, alloy steel, stainless steel
Technical parameter
Product name | Rod lever limit switch | |
Operating speed | 5 mm/s to 0.5 m/s | |
Operating Frequency | Mechanical | 120 operations/min |
Electrical | 30 operations/min | |
Insulation resistance | 100 MΩ min. (at 500 VDC) | |
Contact resistance | 25 mΩ max. (initial value) | |
With stand voltage(50/60 Hz 1 min) | Between the terminals of same pole | AC 1,000V |
Between charged metel parts | AC 1,500V | |
Between non-charged metal parts of each terminal | AC 1,500V 10~55Hz(amplitude 1.5mm) | |
Rated frequency | 50/60 Hz | |
Vibration resistance | Malfunction | 10 to 55 Hz, 1.5-mm double amplitude |
Shock resistance | Destruction | 1,000 m/s2 max. |
Malfunction | 300 m/s2 max. | |
Ambient operating temperature | 5°C to +65°C (with no icing) | |
Ambient operating humidity | 35% to 95%RH | |
Load | AC 380V 5A | |
DC 125V 5A | ||
DC 250V 5A | ||
FAQ
1.What prevents the hoist from lifting a load that is over its rated capacity?
Answer: mechanical slip clutch
2.What is overload protection on a chain hoist?
Answer: chain hoist overload protective devices utilize a slip clutch mechanism, that is, when overload is detected, the slip clutch continues to turn without lifting the load.
3. What is the most important thing to maintain the crane overload protection device?
Answer: operators should always verify the load weight against the hoist's clearly marked rated load to ensure it falls within the safe operating capacity.
CTECH’s overload device installed at 10t overhead crane. This safety device prevents the user from hoisting more than the safe working load
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CONTACT US
Call us: +6012 642 6721
E-Mail: sales@ctechmachinery.com.my
Address: 30, Jalan Anggerik Oncidium 31/71, Kota Kemuning, 40460 Shah Alam, Selangor, Malaysia
