Low Noise Iron Cores B30P105-LM

We are one of the Key Major players in China's transformer iron core industry. We have built the low noise iron cores which use Baosteel's B30P105-LM with the complete sequences cutting lines ensuring the yoke,side pillar and central pillar's laminations come from the same coils,achieving the breakthrough of 3dbs decline.
We are honored to serve you in the coming future.

 

GNEE Silicon Steel is your one-stop purchasing base for silicon steel materials! GNEE, as a Chinese transformer iron core manufacturing expert with the production capacity of 500KV UHV power transformer iron cores, has monthly output of 8,000+ tons of iron cores ( Power transformer, dry type transformer, oil-immersed transformer)

 

B30P105-LM Cold-rolled Oriented Silicon Steel Sheet B30p105 Steel Sheet

 

GNEE steel varietybreed	thickness mm	Brand (model)	Magnetic properties				J800 T	specifications
			P1.7W/kg		P1.5W/kg
Low noise series oriented electrical steel (oriented silicon steel)	0.23	B23R075-LM	0.73	0.97	0.56	0.74	1.92	0.23*980-1200
	0.23	B23R080-LM	0.77	1.01	0.57	0.76	1.91	0.23*980-1200
	0.23	B23R085-LM	0.80	1.04	0.59	0.78	1.91	0.23*980-1200
	0.27	B27R090-LM	0.85	1.12	0.63	0.85	1.91	0.27*980-1200
	0.27	B27R095-LM	0.90	1.19	0.68	0.90	1.91	0.27*980-1200
	0.3	B30R100-LM	0.93	1.22	0.70	0.94	1.91	0.3*980-1200
	0.27	B27P100-LM	0.92	1.21	0.68	0.91	1.91	0.27*980-1200
	0.3	B30P100-LM	0.97	1.29	0.73	0.98	1.92	0.3*980-1200
	0.3	B30P105-LM	1.01	1.34	0.76	1.01	1.91	0.3*980-1200
	0.3	B30P120-LM	1.04	1.38	0.78	1.04	1.91	0.3*980-1200
Special series oriented electrical steel for distribution transformers (oriented silicon steel)	0.23	B23RD085	0.79	1.02	0.59	0.79	1.92	0.23*980-1200
		B23RD090	0.84	1.10	0.62	0.84	1.91

 

Characteristics of GNEE Electrical Steel:

 

1. Low iron loss and high magnetic induction; The product has excellent application performance.

 

2. High thickness accuracy, small difference in vertical and horizontal thickness, and high stacking coefficient.

 

3. Good processing performance, easy to cut, and high precision in slice size.

 

4. High insulation coating, uniform color, good insulation, strong adhesion, excellent heat resistance, and long-lasting corrosion resistance.

 

There are multiple insulation coatings to choose from, and after being tested by professional testing institutions, the content of harmful substances meets the requirements of various environmental regulations both domestically and internationally, including the EU R o HS and REACH.

 

We can customize rolling futures on behalf of customers, and customize rolling dimensions, specifications, thickness, etc. according to customer requirements. The delivery time is 30-45 days.

 

• Experience: Devoted in grain-oriented electrical steel more than 40 years ago, with a complete capability of R&D, manufacturing and application:
• Products: A areat variety of products, including convetional, high permeablity.domain refined,low maanetostriction and chromate-Free coating grain-oriented electrical steel;
• Grades:The most advanced grade with iron loss Pixsso lower than 0.55W/kg;
• Ability: The ever frst steel company in China who developed low-temperature reheating technology with the ability of manufacturing 10096 high grade grain-oriented electrical steel. 

Typical magnetic properties(Typical magnetic properties of major grain-oriented electrical steel grades)

 

Type	Grade	Specific total loss(W/KG)T	Magnetic polarization(T)
		p(1.5/50)
High permeability type	B18P075	0.74	1.89
	B18P080	0.79	1.89
	B20P075	0.74	1.91
	B20P080	0.79	1.89
	B23P085	0.83	1.92
	B27P095	0.92	1.91
	B27P100	0.94	1.91
	B30P105	0.99	1.91
Domain refined type	B18R055	0.54	1.91
	B18R060	0.59	1.92
	B18R065	0.64	1.91
	B20R060	0.59	1.92
	B20R065	0.63	1.92
	B20R070	0.68	1.91
	B23R070	0.69	1.90
	B23R075	0.74	1.92
	B23R080	0.77	1.91
	B23R085	0.80	1.91
	B27R080	0.78	1.92
	B27R085	0.82	1.91
	B27R090	0.86	1.90
	B30R080	0.88	1.92
	B30R100	0.94	1.91

 

transformer core Application support

1.Material selection

Considering overall the factors such as material properties andprices, Baosteel could supply technical support for materialselection for the design of transformer cores. By effectivecomparison between different materials through predictingcore properties according to the design and process, theoptimal cost can be achieved.

 

High efficiency distribution transformers

Grain-oriented electrical steel grades applied to high effciency distribution transformers

Energy efficiency grades for distribution transformers	Energy efficiency grade 1	Energy efficiency grade 2
Oil-immersed distribution transformer	B20R070	B18R055
	B23R070	B20R060
	B23R075	B20R065
Dry type distribution transformer	B23R080	B20R070
	B23R085	B23R070
	B27R085	B23R075

B20R060 : typical values P1.7/50=0.59W/kg, B8=1.92T

Iron loss curves

AC magnetic curves

Exiting power curves

B18R055: typical values P1.7/50=0.54W/kg, B8=1.91T

Iron loss curves

AC magnetic curves

Exiting power curves

Case--Cost-performance ratio analysis for the distribution transformer

• High cost-performance ratio is one motivation to use high-performance grain-oriented electrical steel. Taking the new energy efficiency grade 1 laminated core S15-M-400/10-NX1 oil immersed distribution transformer of GB20052-2020 as an example, four kinds of electrical steel grades of Baosteel are used for transformer cost analysis.

 

B23R075 B20R070 B20R065 B20R060 Material Weight and Cost

• GB20052-2020 new energy efficiency grade 1 products S15-M-200/10, S15-M-400/10 transformers have been successfully manufactured with high grade GO electrical steel B18R055, B20R060 , whose no-load loss and load loss all meet the requirements of the new grade 1 transformer.

Properties of energy efficiency gradeI 1 transformers made with B18R055 or B20R060

 

S15-M-200/10 Test items	Standard value	Measured value
No-load loss,W	190	174(B18R055)
No-load loss,W	190	181(B20R060)
S15-M-400/10 Test items	Standard value	Measured value
No-load loss,W	330	282(B18R055)
No-load loss,W	330	3062(B20R060)

 

 

Energy saving power transformer

Grain-oriented electrical steel grades applied to energy saving power transformer

Grain-oriented electrical steel grades applied	P1.7/50(W/kg)T	B8(T)
B18R060	0.59	1.92
B20R070	0.68	1.91
B23R070	0.69	1.92

 

 

Case--Application of energy saving power transformer Baosteel 2030 Cold Rolling main transformer

Baosteel adopted two large-scale 110kV main transformer manufactured with B20R070 in the production line to upgrade and reform 2030 cold rolling mill. Arcording to the 30 year life expectancy,14.95 million kWh and 7.475 million RMB cost will be saved.

 

Baosteel 2030 Cold Rolling main transformer SFSZ-140000/110kV made with B20R070 performances

NO	Performance indicators	New main transformer	Old main transformer
1	No-load loss	37.46KW	74.9KW
2	No-load current	0.06%	0.31%
3	Load loss	438.2KW	522.6KW
4	Energy saving in 30-year life	14.95million KWh	--
5	Cost saving in 30-year life	7.475million RMB	--

 

Large power transformers

Grain-oriented electrical steel grades applied to large power transformers

Grain-oriented electrical steel grades applied	P1.7/50(W/kg)T	B8(T)
B23RT075	0.72	1.91
B23RT080	0.77	1.91
B27RT085	0.82	1.91
B27RT090	0.86	1.91
B27RT095	0.89	1.91
B27RT100	0.94	1.91

 

 

Case-Dual million transformers used in the ultra high voltage AC transmission project

Baosteel high-grade grain-oriented electrical steel B27R090 wassuccessful applied to manufacturing the dual million transformerODFPS-1000000/1000 for the ultra high voltage Ac transmissionproject. All the transformer properties including no-load lossno-load current and noise meet the design requirements.

Properties of the dual million transformer made with B27R090

 

Test items	Guaranteed value	Measured value
No-load loss,KW	185,+15%	179.9
No-load current,%	0.1	0.07
Noise,dB(A)	75	72

 

Case--Application in Changji - Guquan ± 1100kV UHVDC transmission project from of State Grid.

Baosteel high grade grain oriented silicon steel B23R075 has been successfully applied to the production of converter transformer in Changji - Guquan ± 1100kV UHVDC transmission project of State Grid. The no-load loss, no-load current and noise of the transformer fully meet the technical requirements.

 

The performance of the ±1100kV UHV converter transformer made with B23R075

 

Model	Grades	No-load loss	No-load current	Noise,dB(A)
ZZDFPZ-587100/1000-275	B23R075	198.5	0.079	72
ZZDFPZ-587100/1000-550		199.8	0.089	73

 

Special demand-low noise transformers

With the development of national economy, densification of population in cities, substation load is increasing. The noise requirements of transformers becomes stricter. Baosteel has also developed low-noise products of 0.23mm, 0.27mm, and 0.30mm.

 

Grain-oriented electrical steel grades applied to low noise transformers

Grades	A(wv)1.7/50,dB(A)		P(1.7/50),W/kg		B8,T
	Typical value	Guaranteed value	Typical value	Guaranteed value	Typical value	Guaranteed value
B23R080-LM	57	≤58	0.77	≤0.79	1.91	≥1.88
B23R085-LM	57	≤58	0.80	≤0.82	1.91	≥1.88
B27R095-LM	57	≤58	0.90	≤0.94	1.91	≥1.90
B30R105-LM	57	≤60	1.01	≤1.03	1.91	≥1.90
B30R120-LM	57	≤60	1.04	≤1.06	1.91	≥1.90

Note: Awv,.%, is the A-weighted magnetostriction velocity level at the frequency of 50Hz and the magnetic flux density of 1.7T

 

low magnetostriction grain-oriented electrical steel Case

With transformer noise 2-3dB(A) lower than the requirement,Baosteel low magnetostriction GO electrical steel has beenwidely accepted by customers.

Properties of transformers made with low magnetostriction grain-oriented electrical steel

 

Power products	Noise requirements	Normal material	Low magnetostriction material B30P105-LM
SSZ11-240000/220 transformer	≤63dB(A)	--	60dB(A)
SB11-M-500/10 transformer	≤47dB(A)	44.3dB(A)	42dB(A)
SFSZ-180000/220 transformer	≤63dB(A)	60dB(A)	58dB(A)
SZ-50000/110 transformer	≤60dB(A)	58dB(A)	56dB(A)
SCB11-10000/10 transformer	≤50dB(A)	47.5dB(A)	44dB(A)
DF11-120000/750 transformer	≤65dB(A)	62dB(A)	60dB(A)
S14-M-400/10 transformer	≤48dB(A)	45dB(A)	42dB(A)
BKS-90000/230 transformer	≤75dB(A)	70dB(A)	69dB(A)
BKS-75000/238 transformer	≤75dB(A)	74dB(A)	72dB(A)

 

2.Electrical Steel's Simulation analysis

Ability to provide no-load characteristic analysis
Ability to simulate magnetic feld distribution
Ability to simulate DC magnetic bias characteristics
Ability to simulate harmonic characteristics

3.Technical support in material slitting and cross cutting

Good cutting quality is important to ensure no-load characteristics of transformers.

Cutting toolfactors

• Blade condition
• Gap between blades
• Overlap
• Grinding precision
• Grinding cycle

 

Production line factors

• Production line
• Production speed
• Feed centering
• Stability

 

Material factors

• Material thickness
• Mechanical properties
• Coil status
• Edge quality
• Coating

 

Other factors

• Gap between platens
• Tension pressure
• Position of guides
• Separation ring

4.Electrical Steel Technical support in special operating condition

DC magnetic bias

High order harmonics

GNEE Oriented Electrical Steel 18RK075 18RK080 18RK085 18QG095 20QG085 20QG095 20QG095 20RK075 20RK085 23QG085 23QG090 23QG095 23QG100 23RK070 23RK075 23RK080 23RK085 23RK090 23QDL 27RK085 27RK090 27RK095 27QG100 27QG120 27Q120 27Q130 27QDL 30RK095 30RK100 30RK105 QR120 30QG105 30QG120 30Q120 30Q130 30QDL 35Q135 35Q145 35Q155. Qingshan Base Non oriented Electrical Steel 20WTG1300 20WTG1500 25WGP1300 27WGP1400 30WGP1500 30WGP1600 35WGP1700 35WGP1800 35WGP1900 35WGP2000 35WGP2100 20WTGH1300 20WTGH1500 27WGPH1400 30WGPH1500 35WGPH1700 35WGPH1900 35W210 35W230 35WW250 35WW270 35WW300 35WH230 35WH250 35WH270 35WH300 WHG-35 50WW250 50WW270 50WW290 50WW310 50WW350 50WW470 50WW600 50WW800 50WH310 50WH470 600 50WH800 50WW1000 50W W1300 50WH1300 J23-50 65W310 65W530 65W600 65W800 70WK340 70WK380 80WK420.

 

GNEE Oriented Electrical Steel B18P075 B18P080 B18R055 B18R060 B18R065 B18R070 B18R075 B20HS065 B20HS070 B20HS075 B20HS080 B20P075 B20P080 B20P085 B20R060 B20R065 B20R070 B20R075 B20R085 B20R080 B23HS075 B23HS080 B23HS085 B23RD080 B23RD085 B23RD090 B23R070 B23P085 B23P080 B23P090 B23P090 B23P090 R075 B23R080 B23R085 B23G090 B23G110 B27P085 B27P095 B27P100 B27P110 B27R080 B27R085 B23R090 B27R095 B27G120 B30R090 B3 0R095 B30R100 B30R105 B30P095 B30P100 B30P105 B30P120 B30G120 B35P115 B35P125 B35P135 B35G135 B35G145. 6. Environmentally friendly and low-noise series oriented electrical steel B23R080-LM B23R085-LM B27P100-LM B27R085-LM B27R095-LM B30P100-LM B30P105-LM B30P120-LM 27QG100-H 30QG105-H.

 

GNEE Non oriented electrical steel B15AV1000 B20AV1200 B20AV1300 B25AV1300 B27AV1400 B30AV1500 B35AV1700 B35AV1800 B35AV1900 B35AV2000 B35AV2100 B20AHV1200 B20AHV1300 B27AHV1400 B30AHV1500 B35AHV1700 B25AHV1300M B27AHV1300M B30AHV1500M B15APV1000 B20APV1200 B25APV1300 B27APV1400 B30APV1500 B35APV1700 B35AHS500 B35AHS550 B35AHS600.