Vikarsh Stampings India Private Limited

Vikarsh Stampings India Private Limited

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Toroidal Cores (Ring Cores)

Toroidal Cores and Toroidal Ring Cores offered by us find usage in main transformers and are wound from cold rolled grain oriented (CRGO) silicon steel strips to provide optimum performance. These toroidal cores and ring cores are wound by automatic core winding machine and are annealed in high vacuum furnace under protected atmosphere or in continuous tunnel furnace, which results in features like compact volume, light, low magnetic leakage and hum & high efficiency.

Specifications :

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ATTRIBUTES ACCEPTABLE LIMITS
OUTSIDE DIAMETER OVER mm UPTO mm TOLERANCE IN mm
40 mm 100 -0.0/+1 mm
100 mm 300 -0.0/+2 mm
Above 300 - -0.0/+3 mm
ID & OD tolerance can also be achieved as per customer requirements
INSIDE DIAMETER 0.0 mm / + 1 mm
WIDTH / HEIGHT UPTO 200 mm OD : -0.0/ + 1 mm
OVER 200 mm OD : -0.0/ + 1.5 mm
SLIT BURR 20 Microns
WEIGHT - 0.0 / + 0.2% of Nominal Weight
MAGNETIC CHARACTERISTICS Grade
M3 0.27 AT/CM at 1.5T/50Hz
M4 0.29 AT/CM at 1.5T/50Hz
M5 0.34 AT/CM at 1.5T/50Hz
M6 0.40 AT/CM at 1.5T/50Hz


Comparative Chart

Toroidal core & C.T manufacturers need to know the B-H values of CRGO Materials after annealing over a wide range of Flux densities ranging from 100 Gauss to 19000 Gauss. We give below the actual values obtained on a core of size 150 mm OD x 100 mm ID x 25 mm HT with a stacking factor of 95% and a frequency of 50Hz.

Comparative 8-h Curves Tabulated Values For Different Grades Of CRGO Toroidal Core of Size 150mm Od X 100 mm Id X 25 mm Ht

TESLA M-4GRADE 23 MOH GRADE LASER SCRIBED SUITABLE 30 MOH SUITABLE
FOR METERING CORES FOR P. S. CLASS CORES
AT/CM AT/CM AT/CM AT/CM
0.01 0.013 0.0035 0.003 0.0038
0.02 0.017 0.0058 0.0043 0.0061
0.03 0.021 0.0081 0.0058 0.0076
0.04 0.023 0.01 0.0071 0.0094
0.05 0.026 0.012 0.0086 0.01
0.06 0.03 0.015 0.01 0.012
0.07 0.032 0.017 0.011 0.014
0.08 0.035 0.018 0.0117 0.015
0.09 0.037 0.021 0.013 0.02
0.1 0.041 0.023 0.014 0.022
0.2 0.057 0.041 0.026 0.039
0.3 0.07 0.057 0.038 0.053
0.4 0.086 0.07 0.048 0.064
0.5 0.099 0.082 0.060 0.076
0.6 0.111 0.093 0.066 0.086
0.7 0.123 0.103 0.075 0.094
0.8 0.132 0.112 0.083 0.104
0.9 0.145 0.122 0.091 0.113
1 0.16 0.131 0.1 0.122
1.1 0.165 0.137 0.104 0.13
1.2 0.175 0.145 0.114 0.137
1.3 0.201 0.155 0.122 0.147
1.4 0.224 0.175 0.13 0.16
1.5 0.252 0.193 0.14 0.173
1.6 0.3 0.216 0.162 0.19
1.7 0.351 0.259 0.185 0.21
1.75 0.42 0.295 0.21 0.23
1.8 0.483 0.397 0.26 0.262
1.85 0.6 0.544 0.36 0.338
1.9 0.942 1.22 0.79 0.62
1.95 -- -- -- 1.35

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Product Range

Nanocrystalline Toroidal Cores And Ribbons|  Mitred Transformer Lamination  |  Step Lap  |  Toroidal Cores (Ring Cores)  |  Core Frame Assemblies
Rectangular Strips in CRGO and CRNO  |  Slit Coil  |  Taping and Copper Winding  

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