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Super Cell Dock Marine Fender with CCS Certification

  • Model NO.: Super cell fender
  • Shape: Super Cell Fender
  • Size: Sc1000h
  • Life Span: 15-20 Years
  • Hardness: Shore a
  • Trademark: Fendersys
  • Specification: SC1000H
  • HS Code: 40169400
  • Material: Rubber
  • Structure: Solid
  • Color: Black
  • Application: Dock, Ship
  • Certification: 15-20 Years
  • Transport Package: Normal Package
  • Origin: China
1. Insturction of Super Cell fender
Super cell fender has a hollow cylindrical body with fully rubber-embedded mounting flanges and is designed to deflect in an axial direction. Super cell fender are very robust and have been used for many ports in the world. 
2.Features
High performanceCan support large panelsStrong, well-proven designLow hull pressure systemsWide choice of rubber compounds
3.Applications
Bulk terminalsOffshore platformsContainer berthsGeneral cargo berths
4.Specification:
Fender size                             Dimension
 
  H D1 D2 h n d MD h 1 L
SC800 800 900 1050 30 6 40 32 14 360
SC1000 1000 1100 1300 35 6 47 39 18 430
SC1150 1150 1300 1500 37 6 50 42 18 500
SC1250 1250 1450 1650 40 6 53 45 22 500
SC1450 1450 1650 1850 42 6 61 52 22 570
SC1600 1600 1800 2000 45 8 61 52 26 570
SC1700 1700 1900 2100 50 8 66 56 28 620
SC2000 2000 2000 2200 50 8 74 64 28 700
SC2250 2250 2300 2550 57 10 74 64 32 700
SC2500 2500 2700 2950 70 10 74 64 38 700
SC3000 3000 3150 3350 75 12 90 76 40 800
Note: Other specifications out of the series can be produced upon request.
5.Performance table for super cell rubber fender
Fender Size                           55%  compression Deflection
  RE RS RH RO RL
  R(KN) E(KN.M) R(KN) E(KN.M) R(KN) E(KN.M) R(KN) E(KN.M) R(KN) E(KN.M)
SC800 493 173 437 153 378 132 292 102 225 78
SC1000 880 350 710 310 615 269 473 207 379 116
SC1150 1058 532 939 472 814 409 626 315 501 252
SC1250 1250 683 1109 606 961 526 739 404 592 323
SC1450 1682 1066 1493 947 1294 820 995 631 796 505
SC1600 2007 1405 1781 1247 1544 1080 1189 832 950 665
SC1700 2311 1719 2052 1525 1778 1322 1368 1017 1094 814
SC2000 3199 2798 2839 2484 2561 2153 1893 1656 1514 1325
SC2250 4494 4423 3989 3925 3457 3402 2659 2617 2260 2224
SC2500 5549 6067 4825 5385 4268 4667 3283 3590 2791 3051
SC3000 6750 7200 N/A N/A N/A N/A 5200 5450 4400 4650
Note: Performance tolerance ±10%
Fender size 52.5%  compression Deflection
  RE RS RH RO RL
  R(KN) E(KN.M) R(KN) E(KN.M) R(KN) E(KN.M) R(KN) E(KN.M) R(KN) E(KN.M)
SC800 464 163 412 145 355 125 275 96 211 75
SC1000 752 330 668 293 579 254 445 195 356 156
SC1150 995 502 883 446 765 387 589 297 471 238
SC1250 1176 654 1043 573 904 496 696 382 556 305
SC1450 1582 1007 1404 894 1217 775 936 596 749 477
SC1600 1888 1326 1676 1177 1453 1020 1117 786 894 628
SC1700 2174 1623 1930 1441 1673 1249 1287 960 1027 768
SC2000 3000 2643 2671 2346 2315 2033 1781 1564 1425 1251
SC2250 4228 4178 3752 3702 3252 3214 2502 2473 2126 2105
SC2500 5220 5730 4633 5086 4015 4408 3088 3391 2625 2882
SC3000 5800 6700 N/A N/A N/A N/A 4400 5100 3750 4300
Note: Performance tolerance ±10%
6.Contact Information:
 Contact Information:
Demi Jia
Room320, #699-1 Xuanwu Avenue, Xuanwu District Nanjing P.R.C.
Tel:+86-25 85581765
Web: www.fendersys.com
Phone:+86-18751950876
 

The insulation breakdown accident often occurred in generator. It includes interphases short circuit, inter-turn short circuit and ground fault.

    The interphase short circuit: the generator windings ends will be greatly impacted by electric power and may make the coil end deformed under two-phase or three-phase short circuit and differential protection tripping happening.

   Inter-turn short circuit: Generator outlet blasting, if it continues a long time, the stator copper wire will be melted. When no-load run, the generator three-phase voltage will be imbalance.

   Ground fault: Generator breakdown location is in the linear portion or notch position and stator ground protection act. The insulation resistance value between stator ground and ground is zero or minimum.

   The fundamental reason of generator insulation breakdown is that the stator coil insulation is weak or there is a corona etching in notch in run time. The treatment method is to find the point of breakdown and reworked and reinforced insulation. At the same time, eliminating the corona etching in a maximum extent is important.

III. A large noise or vibration with generator

   The reasons of a large noise or vibration with generator are:

   1. Foundation bolts loose, or STG subsidence. Treatment: fastening bolts. Recalibration concentricity.


   2. Generator rotor and Steam Turbine shaft are misalignment. Treatment: calibration concentricity.


   3. Bearing wall worn or damaged under short oil. Treatment: repaired bearing or replace a new bearing with same model.


   4. There is a friction between the stator and rotor. Treatment: find the friction location and reason, and then eliminate it.


   5. Fan or other fasteners loose. Treatment: Tighten fan and fasteners.


   6. Rotor coil partial short circuit, two points grounding or wiring errors. Treatment: please inspect the insulation of slip ring and the rotor coil to the ground. Or connect to the DC power source and check the voltage drop of each coil, winding direction and wiring method. So we can identify the cause of the malfunction and eliminate them.


  7. Brush is too hard, or the pressure is too large. Treatment: adjust the pressure or replace the same type of brush.


  8. Three-phase current are severe asymmetry. Treatment: please investigate that the three-phase current imbalance is in the allowable range or not. If it is not in the allowable range, please adjust three-phase load or reduce the load.


   9. Stator winding short circuit or ground. Treatment: Find out the fault and repair it.


   10. External fault or lightning strike. Treatment: if the vibration time is too long, please stop the STG and inspect.


Typical

cases:


   This is a 15 MW generator from a Shandong customer. The vibration of generator is reached to 0.12mm in running. After inspection the generator, we found that rotor dynamic AC impedance upheaval 12% in 2400-2700 and the dynamic inter-turn short circuit is serious. It destroys the balance of the magnetic field and causes the electromagnetic force uneven of generator rotor. After removal of the rotor retaining ring and treatment the rotor inter-turns, we start the STG. The vibration is about 0.01mm.


IV. The temperature of a generator is too high.


   Generally the temperature of a generator will be in the allowable value, if the generator running normally and the current, voltage, frequency, power, excitation current and power factor are all within the allowable fluctuation range. If a generator stator, core and other parts temperature are too high, please consider the following cases:


   1. Generator overload operation and exceed the allowable time. Treatment: Please reduce the generator load to the rated load or under rated load as soon as possible.


   2. Three-phase current are serious imbalance. Treatment: please find out the reason of imbalance. If it is the voltage causing, please check if it is the generator inter-turn short circuit. If it is load causing, please adjust the load and make it balance.


   3. The ventilation cooling system of generator is poor. For example, the temperature is too high, the air duct or exhaust duct are blocked, the coil and its ends are serious fouling. Treatment: please reduce the load suitability, improve ventilation, and remove fouling.


   4. The stator winding portion short circuit or ground. Treatment: Find out the short circuit or ground point and repair them, and then eliminate short circuit or ground risks.


   5. Insulation of the stator core may be partially damaged and short circuit, so there is a vortex and overheat. Treatment: please reduce the load suitability. If the generator reduces its efficiency obviously, please repair the generator stator core.


   6. The bearing is short of lubricating oil. The oil number is wrong. The oil quality is bad. The bearing is installed with a wrong way or the bearing is damaged. Treatment: please find out the reason and then replace the oil or clean, adjust or replace bearing.



V. Generator rotor ground


   Symptom: Generator grounding one point or two points grounding light plate light.


   Fault Analysis: Generator rotor winding insulation damage, coil deformity and severe dust and greasy attached in the ends seriously are all leading to the grounding of the generator rotor windings. When the generator rotor winding grounding in one point, there is electrical current pass as the ground does not constitute an electrical circuit.

However, after one point grounded, it is easy of leading another grounding point. If any part in excitation circuit ground, it can form ground fault of two or more points ground. It is very dangerous.

After the failure, the rotor windings are short-circuited. Because of the small winding DC resistance, the excitation current will increase. So the magnetic field of generator is out of balance, and main magnetic flux reduces largely. So the STG will vibrant strongly. Meanwhile the power factor of the generator will be increased significantly and get into leading phase running (absorption of reactive power from the grid).


   The stator field becomes in the frond and the rotor field becomes in the back. It will make the stator current increases. If the watcher notice that there is no excitation varying but the excitation current and stator current suddenly increases, and the excitation voltage and AC voltage are all suddenly drop, and power factor meter indicates increasing or leading phase, it means the generator rotor grounded or inter-turn short circuited. You should shut down the STG and blow-out magnetic. Please inspect the excitation system and rotor windings, and find out the short circuit point and treat it.  



VI. Excitation upgrading and generator test


   Excitation system upgrading, brushless exciter changes into the SCR excitation and make the generator maintenance easily. And it removes the disadvantage of brushless excitation dynamic adjustment slowly. The generator test includes stator insulation resistance test, the absorption ratio test, the iron loss test, leak test, AC and DC voltage withstand test, the rotor high speed balancing and overspeed test, dynamic and static AC impedance test, the generator no-load test, short circuit test, temperature rise test, residual pressure measurement, axis voltage measurement.



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