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20t/5t European Model VFD Control Double Girder Overhead Bridge Crane
Double girder overhead cranes are mainly composed of bridge, trolley running mechanism, trolley, electrical equipment and so on. According to the different degree of frequent use, it is divided into three working levels: A5, A6 and A7. Hook overhead travelling crane maneuvering is all done in the driver.
The cranes standard speeds are adjustable, which allow the crane adjust its speed under 2~3 grades. The crane could also be equipped with frequency inverter, which makes the crane speeds adjusted under 10 grades speeds. It could move very slow which makes it possible to do very accurate works.
This model overhead crane is designed under GB regulation, passed ISO, CE certification.
The crane lifting and travelling speeds are steady and accurate.
This series of Cranes use three-phase 380V, 50 Hz power supply or other three-phase power supply. The working environment temperature of variable speed double beam bridge crane is - 20 ºC - 40 ºC, the relative humidity is less than 85%, and the altitude is not more than 1000 meters.
According to the requirements of operation safety and reliability, all mechanisms of the variable speed double beam bridge crane are equipped with brake and travel end limit switch. The main power supply of the variable speed double beam bridge crane is introduced by the safety sliding contact line. The power supply of the trolley is supplied by a suspended flexible cable installed on the walking platform.
1. Overload protection in the event of overload, the hoist unit switches off and only the lowering motion is possible
2. Long and cross travel limited by means of preliminary and final limit switches or infrared anti-collision device
3. Anti-falling protection for the Three-in-One electric motor of trolley and crane prevents from accidental falling
4. All movements can be switched off by actuating the emergency-off switch at the control station via a main contact
5. High quality long time bearing polyurethane materials buffer fixed at the end of trolley travelling and crane travelling to prevent over traveling
6. Safety hook latch used for avoiding the lifted material out off from the hook
7. Audible and visual alarm device to inform the person stay near by the travelling crane
8. Rain Cover for lifting mechanism of outdoor cranes, electric cabinet and driving mechanism
9. Protective earth conductor is fitted as standard
10. Voltage lower protection system
11. Current overload protection system and more (contact with us more details)
| Lifting Capacity | T | 10 | 16 | 20/5 | 32/5 | 50/10 | 100/20 | 250/50 | 450/80 (A3) | |||
| Operational Method | Cabin | |||||||||||
| Speed | Main Hook Lifting | A5 | m/min | 8.5 | 7.9 | 7.2 | 7.5 | 5.9 | 3.9 | 2.3 | 0.895(A3) | |
| A6 | 13.3 | 13 | 12.3 | 9.5 | 7.8 | 4.9 | / | / | ||||
| Aux. Hook Lifting | 16.7 | 19.5 | 19.5 | 13.2 | 7.2 | 9.8 | 4.84 (A3) | |||||
| Cross Traveling | 43.8 | 44.6 | 44.6 | 42.4 | 38.5 | 33.86 | 28 | 5.1 (A3) | ||||
| Long Traveling | A5 | 90.7/91.9/84.7 | 84.7/87.6 | 84.7/87.6 | 87/74.2 | 74.6/85.9 | 65.7 | 43 | 20(A3) | |||
| A6 | 115.6/116/112.5 | 112.5/101.4 | 112.5/101.4 | 101.4/101.8 | 86.8/87.3 | 65.7 | / | / | ||||
| Motor | Lifting | Main | A5 | Type / Power |
YZR180L-6/17 | YZR225M-8/26 | YZR225M-8/26 | YZR280S-10/42 | YZR280S-10/55 | YZR315M-10/85 | YZR355L1-10/132 | YZR355M-10/110 |
| A6 | YZR250M1-6/37 | YZR225M2-6/45 | YZR280M-8/55 | YZR315S-8/75 | YZR355M-10/90 | / | / | |||||
| Aux. | YZR200L-6/22 | YZR180L-8/13 | YZR180L-6/17 | YZR180L-6/17 | YZR200L-6/26 | YZR225M-8/26 | YZR315M-8/100 | YZR280M-8/75 | ||||
| Cross Traveling | YZR132.1-6/8*6.3 | YZR132M2-6/4 | YZR132M2-6/4 | YZR160M-6/6.3 | YZR160M2-6/8.5 | YZR180L-8/13 | YZR200L-6/22 | YZR160M-6/6.3 | ||||
| Long Traveling | A5 | YZR132M2-6/2*4 | YZR160M1-6/2*6.3 | YZR160M1-6/2*6.3 | YZR160M2-6/2*8.5 | YZR160L-6/13 | YZR200L-8/2X26 | YZR200L-8/18.5x4 | YZR160L-6/13x4 | |||
| A6 | YZR160M1-6/2*5.5 | YZR160M2-6/2*7.5 | YZR160M2-6/2*7.5 | YZR160L-6/2*11 | YZR180L-8/13 | YZR225M-8/2X30 | / | / | ||||
| Working Duty | A1, A3, A5,A6, A7, A8 | A5 | A1, A3 | |||||||||
| Power Supply | Three-phase A.C. 220~480V, 50~60Hz | |||||||||||
| Span | m | 10.5-31.5 or more | ||||||||||
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