DT-Core-TechBulletin-21-May-2020-Final.pdf

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Metglas
www.metglas.com
®
Amorphous Metal Transformer Core
Product Release
Metglas has capabilities in-house to make distribution transformer cores
in order to support our customer designs and their production needs.
Our Amorphous Transformer cores are manufactured from low loss
Metglas
®
2605HB1M transformer core alloy.
This low loss, high
permeability alloy has excellent performance for
Single and Three phase
commercial, industrial and distribution transformer applications.
Metglas cores are installed using industry standard transformer assembly
techniques.
General Properties & Characteristics for Metglas
®
2605HB1M transformer core alloy
Physical Properties
Nominal
Composition
Density
(g/cm3)
Standard
Available
Widths (mm)*
142.2
170.2
213.4
Vickers
Hardness
Hv-50 g load
Tensile
Strength
(N/mm2)
Thermal Expansion
Coefficient
(x10-6 /°C) 30 - 300°C
Crystallization
Temperature
(°C)
Alloy
2605HB1M
FeBSi
7.33
900
2,100
4.3
489
*Please contact sales representative for custom ribbon width
Magnetic Properties
Saturation
Induction (T)
1.63
Remnant
Induction (T)
Annealed
1.53
Coercivity, Hc
(A/m)
Annealed
0.9
Max DC
Permeability
Annealed
1,000,000
Curie
Electrical
Temperature
Resistivity (μΩm)
(°C)
1.2
364
Magnetostriction
(x10-6)
27
Typical Core Loss At 25°C**
0.4
0.35
50 Hz
60 Hz
0.3
0.25
0.2
0.15
0.1
0.05
0
1
1.1
1.2
1.3
1.4
1.5
Flux density (T)
**DT
Core Data – 142.2 mm wide ribbon
Typical Exciting Power At 25°C**
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1
Exciting power (VA/kg)
50 Hz
60 Hz
Core loss (W/kg)
1.1
1.2
1.3
1.4
1.5
Flux density (T)
Operating Flux Density
Design induction is dependent upon various considerations such as operating temperature, overvoltage
requirements, sound level etc.
Typical Single Phase / Three Phase:
1.42Tesla
Email:
metglas@metglas.com
www.metglas.com
Tel:
1-800-581-7654
Metglas
Technical Bulletin
®
1-800-581-7654
metglas@metglas.com
www.metglas.com
Amorphous Metal Transformer Cores
Geometric Properties:
Oil Vent
Core Design Specification Example
RW
= Ribbon Width
A
= Window Height (Nom.)
B
= Window Width (Nom.)
C
= Core Build
D
= Core + Epoxy Cover Width
R
= Window Radius (Nom.)
J
= Maximum Build at Joint
Minimum Core Net Area
mm
170
280
100
75
174
6.4
93.8
113.5 cm
2
Inches
6.7
11.02
3.94
2.95
6.85
0.25
3.69
17.59 in
2
RW
J
Edge Cover
Typical Magnetic Properties at 1.42 Tesla:
Nominal Properties:
Weight:
83.4 kg
183.9 lbs
Material:
Metglas 2605HB1M
Frequency
Core Loss
Total Core Loss
Exciting Power
Total Exciting Power
50 Hz
0.20 Watts/kg
16.5 Watts
0.52 VA/kg
43.3 VA
60 Hz
0.25 Watts/kg
20.8 Watts
0.63 VA/kg
52.2 VA
Core Space Factor
- 89%
Measurements taken without oil impregnation at ambient temperature.
Core Coil Assembly Process
Unlace
Insert
core/coil
Re-lace
Maximizing Core Performance
Lowest losses are achieved when the core is in it’s lowest
stress conditions:
-
Use magnets for lifting and handling cores
-
Avoid supporting the coils on the core
-
Avoid packing the coils forcefully against the cores
-
Avoid overtightening of coil framing fixtures
Coil
Windings
Core Packing
Metglas Cores are packed with three levels of protection:
corrosion inhibiting paper, moisture resistant polyethylene
barrier, and a rigid corrugated exterior. For maximum
protection, cores should remain in original packaging until
ready for assembly.
Core Coil Assembly process with Metglas Amorphous
Metal Distribution Transformer cores is much easier
compared to traditional silicon steel cores.
Energy Savings and CO2 Reduction with Amorphous Metals
Metglas® amorphous alloys are earth-friendly, high technology materials for distribution transformers that can
reduce no-load loss (standby electricity) in distribution transformers to about one-third the level compared to those
using grain-oriented electrical steel. Worldwide use of amorphous metal-based transformers, therefore, will help us
reduce fossil-fuel dependency and create a cleaner environment with higher air quality
Metglas
®
2605HB1M - Next Generation of Amorphous Transformer Core Alloy is
made in America!
www.metglas.com
Copyright© 2020, Metglas, Inc. All Rights Reserved
Metglas, Inc. is a Fully Owned Subsidiary of Hitachi Metals America Ltd.

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