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BGOC is manufacturing following quality products :

Products Raw Materials used with Grade End use
Transformer Cores & Laminations CRGO Grades M3, M4, M5, M6, Orient Core - HI-B & HI-B-LS 23ZDKH-90 & 27 ZDKH-95 Auto, Distribution & Power Transformers
E & I Laminations as per Customers special specifications and design & standard type. All CRGO Grade as stated above and CRNGO Grades as per customers specifications. Control Transformers, Instrument Transformers, Iron Core Chokes.
Wound Cores  All CRGO Grades as stated above as per customers specifications. Current Transformers.

Specifications of Raw Materials :

Cold Rolled Grain Oriented (CRGO) Electrical Steel Sheets :
Typical Electrical and Magnetic Properties of :

Grade Thickness mm (inch) Core Loss Watt per Kilogram 50 HZ Resistivity Ohm
{X 10 -8}		 Induction 800 A/m Assumed Density kg/dm Stacking Factor %
     1.5T  1.7T        
 23ZH90 0.23 (0.009) 
 
 		 0.63 0.87  50  1.92   
7.65 
 
 
 
 

97.4
97.4
97.6
97.6
97.6
97.6
 23ZH95 0.64  0.90  50 1.91 
M-OH 0.66  0.93 50 1.90
M-1 0.69  1.02  50 1.86
M-2 0.71  1.08  50 1.85
M-3 0.76 1.12  50 1.84
27ZH95  
 
0.27 (0.0106) 
 		 0.69  0.93 48  1.92  7.65  
 
 
 		 97.8 
 
 
 
27ZH100 0.70  0.96 48 1.91 
M-OH 0.72  0.99  48 1.91 
M-4 0.83 1.22  48 1.84 
M-5  0.30 (0.0118) 0.90 1.29  48 1.83  7.65   98.1 
M-6  0.35 (0.0138) 1.01 1.46 48 1.83  7.65 

98.2

Cold Rolled Non-Grain Oriented(CRNGO) Electrical Steel Sheets :

Typical Electrical & Magnetic properties

Thickness Grade Specific Cores Loss
W/kg. At.		 Magnetic Induction
At 5000 AT/m(T)		 Hardness
(VPN)
1.0 T
50 Hz		 1.5 T
50 Hz
0.50 mm
(0.020 )

 		 M-36  1.84 3.57 1.60 160-180
M-43  1.70 4.01 1.61 160-180
M-45  2.30 5.31 1.64 130-150
M-47  4.00 6.98 1.68 130-150
0.65 mm
(0.026 )		 M-36  2.16 4.18 1.60 160-180
M-43  2.52 4.70 1.60 150-170
M-45  3.03 6.27 1.64 130-150

Tolerances for Laminations :

Our Internal Standards & Normal Tolerances

Width Nominal width in mm Tolerance in mm
  <150 -0.2 -0.2
  150 - 400 -0.3
  >400 -0.5
Length <315 +0/-0.4
  316 - 1000 +0/-0.6
  1001 - 2000 +0/-0.8
  >2000 +0/-1.0
Burr level 25 Microns or 10% of thickness (Max.)
Angle +/-5 minutes
Edge Camber The camber measured on 2 mm must not exceed
0.2 mm for width >250 mm
0.3 mm for width <250 mm
Thickness he tolerance on the thickness at any point, on any sheet, or strip measured by micrometer at a point not less than 15 mm from any edge shall not exceed +/- 10 percent of nominal thickness of sheet.
Insulation Resistivity Min. 10 Ohm/sq. cm. as per Franklin method


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