High-linearity current transformer core (SYH3LN)

Performance characteristics

Excellent core permeability consistency improves the linearity of transformers.
Adjustable permeability range to accommodate different rated current levels;
Good temperature stability;
Miniaturization

Application areas

High-precision current transformer for electricity meters
Precision Current Transformers for Power System Measurement and Control

Basic Material Parameters

	Fe-based nanocrystals
Saturation magnetic induction intensity Bs (T)	≥1.20
Curie temperature (°C)	570
Saturation magnetostriction coefficient (×10⁻⁶)	<2
Initial permeability µ0	≥100000
Coercive force A/m	<1.6
Density g/cm³	7.3
Lamination coefficient	≥0.8

Characteristic curve

Ui = 200 kA/m, Um = 370 kA/m, Bs = 1.05 T, Br = 0.37 T, Hc = 0.44 A/m

Case 1:

Core dimensions: 9.5/13*5

Transformer parameters: 5A/2.5mA 20Ω

5% current point		20% current point		100% current point		120% current point		5% and 120% Angle difference value
Difference (%)	Angle difference (')	Difference (%)	Angle difference (')	Difference (%)	Angle difference (')	Difference (%)	Angle difference (')	5% and 120% Angle difference value
0.000	6.58	0.000	6.15	-0.008	5.24	-0.010	4.97	1.61
0.000	7.03	0.000	6.65	-0.010	5.5	-0.012	5.38	1.65
0.000	6.35	0.000	5.87	-0.006	4.95	-0.008	4.81	1.54
0.003	6.36	0.001	5.97	-0.006	5.02	-0.008	4.78	1.58

Case 2:

Core dimensions: 2.4/23.9 × 8

Characteristic curve:

Ui = 24 k, Um = 27 k, Br = 0.016 T, Hc = 0.4 A/m

(Note: Different permeability levels can be achieved based on varying customer design requirements, thereby meeting the different linearity demands of current transformers.)

Common Product Specifications

Product Grade	Magnetic core size Inner diameter × outer diameter × height (mm)	External dimensions Inner diameter × outer diameter × height (mm)	Effective cross-sectional area (cm ²)	Magnetic circuit length (cm)	Note
SYH3LN 131005C	9.5 × 13 × 5	8.2 × 13.6 × 6.8	0.068	3.53	Protective case
SYH3LN 131010C	9.6 × 13.2 × 10	8.2 × 15.3 × 12.0	0.14	3.58	Protective case
SYH3LN 181305C	13 × 17.8 × 5	11.5×19.8×6.5	0.093	4.83	Protective case
SYH3LN 221310C	13.2 × 21.5 × 10	11.4 × 24.3 × 12.8	0.32	5.45	Protective case
SYH3LN 191407C	14×19×6.5	12.0 × 22.4 × 9.0	0.12	5.2	Protective case
SYH3LN 191408C	14×19×8	12.0 × 22.8 × 10.2	0.15	5.2	Protective case
SYH3LN 201410C	14×20×10	12.0 × 22.8 × 12.0	0.23	5.3	Protective case
SYH3LN 211510C	15×21×10	12.7 × 23.7 × 12.6	0.23	5.7	Protective case
SYH3LN 211610C	16×21×10	13.4 × 23.8 × 12.3	0.19	5.8	Protective case
SYH3LN 231608C	16×23×8	14.0 × 24.9 × 10.9	0.21	6.1	Protective case
SYH3LN 261610C	16×26×10	14.0 × 28.5 × 12.8	0.38	6.6	Protective case

(Note: Core sizes can be customized according to customer requirements.)

High-linearity current transformer core (SYH3LN)

• Excellent and stable core permeability, enhancing the linearity of transformers; • Adjustable permeability range to accommodate different rated current levels; • Good temperature stability; • Miniaturized size.