Nu328ecm /C3vl2071 Current Insulating Bearings Rail Vehicles

Model NO.
NU328ECM/C3VL2071
Certificate
ISO9001
MOQ
1PCS
Payment
L/C, D/a, D/P, T/T, Western Union, Moneygram
Delivery
7-35 Days
Drawing
Avalibale
Transport Package
Single Box
Specification
NU328ECM/C3VL2071
Trademark
MONTON
Origin
Luoyang
HS Code
8482102000
Production Capacity
1000PCS/Week
Reference Price
Please contact us for quote
Contact Us

Product Description

Name Current-Insulating Bearings
Brand MONTON
Model NU328ECM/C3VL2071
d 140mm
D 300mm
D 62mm
Ring Material Gcr15/Special materail
Cage Material Brass cage
Load rating  dynamic 682KN
Load rating  static 830KN
Fatigue Limit Load Pu[kN] 88
Reference speed [r/min] 2200
Limiting speed [r/min] 2800
Sealed as customer requested
Weight 25KG
Design Structure Roller
Precision P5/P6 or as customer requested
Vibration ZV1, ZV2, ZV3, or  as customer requested
Clearance C0, C2, C3, or  as customer requested
Quality standard ISO9001: 2000/SGS
Package single box
Original Luoyang
Service OEM
Delivery date Accordingly
Application Threephase motor,Traction motor,Wind power generator

Insulated Insocoat bearings

Electric motors, generators and associated equipment are at risk when an electric current passes through their bearings. This can damage the contact surfaces of rolling elements and raceways in the bearings (electrical erosion) and rapidly degrade the grease. An additional risk in electric motors and generators comes from high frequency currents caused by the inherent stray capacitance. 

The risk of damage increases where the application uses a frequency converter.

Insulated Insocoat bearings are designed to prevent electric current from passing through the bearing have the external surfaces of either their inner or outer ring coated with an insulating aluminium oxide layer, by applying a sophisticated plasma-spray process for an outstanding quality finish  are a very cost-effective solution compared with other insulation methods.

Electrical pitting often occurs in the use of rolling bearings in high power electromotor, wind turbine generator and rail vehicles motor systems and cause sparks that damage the rolling contact surface, ultimately lead to bearing failure.

Electric insulated bearings therefore have been created and take the place of non-insulated bearings. we  applies advanced surface modification process overlay a ceramic coating on the bearing ring, to insulate the electrical current flow into bearing substrate, so the electrical pitting is prevented and bearing's service life is extended.

It is significantly more cost-effective to provide for the use of electrically insulated bearings at the planning stage. As a result, customer benefit is increased through reduced maintenance costs and higher machine availability.

SAT series are the electrically insolated bearing products developed and marketed by us The insulation has a guaranteed breakdown resistance of at least 1000V AC or DC. We can also develop tailored modes for customer on types and precision levels, as well as higher electrical insulation.

Bearing features

Protection against electrical erosion 

With insulating properties integrated into the bearing, INSOCOAT bearings can improve reliability and increase machine uptime by virtually eliminating the problem of electrical erosion.

High electrical resistance 

The aluminium oxide coating provides a minimum electrical resistance of 200 Ω and can withstand voltages up to 3 000 V DC.

Consistent electrical performance 

Plasma-spray coatings are normally hygroscopic and, therefore, vulnerable to penetration caused by condensation. To protect against this effect, INSOCOAT bearings are treated with a unique sealant.



Application of Insulated Bearings in Electric motors

1. Causes and harm of motor shaft voltage and bearing current formation

In the operation of the motor, any imbalance in the phase currents in or around the rotor's magnetic circuit can  produce a rotating system flux linkage.

When the shaft rotates, these flux chains can generate a potential difference across the shaft. This potential difference is called the shaft voltage. The shaft voltage can excite a circulating current through a loop formed by the two ends of the bearing in the shaft and the casing (closed circuit), which is called the shaft current.

In addition, the rotor core has more remanence, For a wound rotor motor, shaft voltage and shaft current are generated if two or more windings are short-circuited to the rotor core or the shaft. the bearing current is related to the structure of the motor, the power of the motor, the magnitude of the drive voltage, the rise time of the pulse, the length of the cable, etc. The larger the power of the motor, the higher the driving voltage, the steeper the rising edge of the driving voltage, and the shorter the cable, the larger the bearing current.


2. How to block shaft current - use electrically insulated bearings

In order to avoid damage to the bearing caused by the shaft current, effective measures should be taken to isolate the shaft current. For large motors with independent bearing housings at both ends, spacers made of insulating material can be placed between the bearing housing and the metal base. For a motor in which an ordinary bearing and a casing are integrated, an Electrically insulated bearing is generally used at one end thereof (often arranged at the non-spindle end).

For high requirements, insulated bearings are installed at both ends. The insulating bearing used is generally a method of attaching (generally coating) an insulating layer to the outer ring. In some cases, the inner and outer rings are also provided with an insulating layer.

Electrically insulated bearings avoid damage caused by electrical corrosion, so they are more reliable in operation than in conventional bearings. And compared to other insulation methods, such as shaft or housing insulation, etc. More cost effective and reliable. Insulated bearings have the same dimensions and basic technical features as non-insulated bearings Suitable for motors, generators, especially variable frequency motors.

CoatMaster (China Bearing manufacturer), As the exprienced Electrically Insulated Bearing manufacturer of China, Not only produce insulated deep groove ball bearing, insulated cylindrical roller bearing, insulated tapered roller bearing, insulated angular contact ball bearing and the other type of insulated bearing, but also supply complete and expert solution for electric motor and the other applications where need insulated bearing. if you have problem make you distracted about the insulated bearing, just contact with our bearing technical team.
Designation Principal dimensions Basic load ratings Fatique load limit Speed ratings Mass
dynamic static Reference speed Limiting speed
d D B C C0 Pu
mm mm mm kN kN kN r/min   kg
NU1010ECP/C3VL0241 50 80 16 47,3 57 7,2 9 500 9 500 0,27
NU210ECM/C3VL0241 50 90 20 66 72 9,15 7 500 9 000 0,48
NU310ECM/C3VL0241 50 110 27 112 116 15,3 6 000 8 000 1,35
NU1011ECP/C3VL0241 55 90 18 57,2 69,5 9 8 500 13 000 0,4
NU1011ECML/C3VL0241 55 90 18 57,2 69,5 9 8 500 13 000 0,45
NU211ECM/C3VL0241 55 100 21 85,8 100 12,9 7 000 8 000 0,78
NU311ECM/C3VL0241 55 120 29 138 146 19 5 600 7 000 1,75
NU1012ML/C3VL0241 60 95 18 38 45,5 5,85 8 000 13 000 0,48
NU1012ECP/C3VL0241 60 95 18 58,3 73,5 8,8 8 000 8 000 0,48
NU212ECM/C3VL0241 60 110 22 96,8 106 14 6 300 7 500 0,97
NU312ECM/C3VL0241 60 130 31 151 160 20,4 5 000 6 700 2,15
NU1013ECP/C3VL0241 65 100 18 62,7 81,5 10,6 7 500 7 500 0,45
NU213ECM/C3VL0241 65 120 23 110 122 16 5 600 6 700 1,25
NU313ECM/C3VL0241 65 140 33 183 196 25,5 4 800 6 000 2,65
NU1014ECM/C3VL0241 70 110 20 70,4 85 10,8 7 000 7 000 0,69
NU1014ECP/C3VL0241 70 110 20 76,5 93 12 7 000 7 000 0,62
NU214ECM/C3VL0241 70 125 24 121 140 18,6 5 300 6 300 1,35
NU314ECM/C3VL0241 70 150 35 209 228 29 4 300 5 600 3,1
NU1015M/C3VL0241 75 115 20 58,3 71 9,3 6 700 6 700 0,75
NU215ECM/C3VL0241 75 130 25 132 160 21,2 5 300 6 000 1,5
NU315ECM/C3VL0241 75 160 37 242 270 34 4 000 5 300 3,9
NU315ECP/VL0241 75 160 37 242 270 34 4 000 5 300 3,9
NU1016ECM/C3VL0241 80 125 22 99 127 16,3 6 000 6 000 1,05
NU216ECM/C3VL0241 80 140 26 142 173 22 4 800 5 600 1,85
NU316ECM/C3VL0241 80 170 39 264 290 36 3 800 5 000 4,6
NU1017M/C3VL0241 85 130 22 72,1 91,5 11,6 6 000 6 000 1,1
NU217ECM/C3VL0241 85 150 28 168 200 25,5 4 500 5 300 2,25
NU317ECM/C3VL0241 85 180 41 297 340 41,5 3 600 4 800 5,3
NU1018M/C3VL0241 90 140 24 85,8 110 13,7 5 600 5 600 1,35
NU218ECM/C3VL0241 90 160 30 187 224 28 4 300 5 000 2,75
NU318ECM/C3VL0241 90 190 43 319 360 44 3 400 4 500 6,25
NU1019ML/C3VL0241 95 145 24 88 116 14,3 5 300 5 300 1,4
NU219ECM/C3VL0241 95 170 32 224 270 33,5 4 000 4 800 2,85
NU319ECM/C3VL0241 95 200 45 341 390 46,5 3 200 4 300 7,25
NU1020M/C3VL0241 100 150 24 89,7 122 15 5 000 5 000 1,45
NU220ECM/C3VL0241 100 180 34 251 310 38 3 800 4 500 4
NU320ECM/C3VL0241 100 215 47 391 440 51 3 000 3 800 8,65
NU1022M/C3VL0241 110 170 28 130 173 20,8 4 500 4 500 2,3
NU222ECM/C3VL0241 110 200 38 297 375 44 3 400 4 000 5,6
NU322ECM/C3VL0241 110 240 50 468 540 61 2 600 3 400 12
NU1024M/C3VL2071 120 180 28 138 190 22,4 4 000 4 000 2,55
NU224ECM/C3VL0241 120 215 40 341 440 50 3 000 3 600 6,65
NU324ECM/C3VL0241 120 260 55 539 620 69,5 2 400 3 200 15
NU1026M/C3VL2071 130 200 33 168 232 27 3 800 5 600 3,85
NU226ECM/C3VL2071 130 230 40 369 465 52 2 800 3 400 7,6
NU326ECM/C3VL2071 130 280 58 627 750 81,5 2 200 3 000 18,5
NU1028M/C3VL2071 140 210 33 179 255 29 3 600 3 600 4,05
NU228ECM/C3VL2071 140 250 42 396 520 58,5 2 600 3 200 9
NU328ECM/C3VL2071 140 300 62 682 830 88 2 200 2 800 25
NU1030M/C3VL2071 150 225 35 194 275 18 3 200 3 200 4,9
NU230ECM/C3VL2071 150 270 45 457 610 65,5 2 400 2 800 12
NU330ECM/C3VL2071 150 320 65 765 950 100 2 000 2 600 31

Nu328ecm/C3vl2071 Current Insulating Bearings Rail Vehicles Nu328ecm/C3vl2071 Current Insulating Bearings Rail Vehicles Nu328ecm/C3vl2071 Current Insulating Bearings Rail Vehicles Nu328ecm/C3vl2071 Current Insulating Bearings Rail Vehicles Nu328ecm/C3vl2071 Current Insulating Bearings Rail Vehicles Nu328ecm/C3vl2071 Current Insulating Bearings Rail Vehicles
 

 

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