Zero Sequence Current Transformer Core for RCCB

• Type: Low-voltage
• Operation: Electric
• Grounding Mode: Not Grounding
• Grounding: Un Grounded
• Structure of Operating: Electric
• Certification: CE
• Model NO.: VNL series
• Output Voltage Ratio: 0.9 or Above
• Transport Package: Cardboard
• Specification: AC/A
• Trademark: VEKON
• Origin: China
• HS Code: 8504909090
• Production Capacity: 100, 000 PCS

Product Description

Nanocrystalline core  is the best material for zero sequence CT in a RCCB(residual current circuit breaker) core. RCCB is designed to disconnect the circuit if there is a leakage current. It is critically important in protecting circuit safety in both residential and industrial use. It can be classified into electronic type, electromagnetic type(DC pulsating); A type, AC type, B type ,etc. Zero sequence CT core is a critical component inside.
 
 
Characteristics:
   a.  Very high permeability and output voltage
   b.  High Bs, low core loss
   c.  Good thermal stability, high Curie temperature
   d.  Competitive prices

Applications:
    a. Electronic RCCB
    b. Electromagnetic RCCB( type A, type AC, type B).
 
 
 
Comparison of magnetic characteristics between typical nanocrystalline core and perm alloy core:

Main Parameters	Nanocrystalline	Perm alloy
Bs	1.2	0.7
Initial permeability(Gs/Oe)	>80000	>10000
Max permeability (Gs/Oe)	>450000	>200000
Remanence Br(T)	0.1	0.4
Coercivity(A/m)	<1.6	>0.4
Density(g/cm^3)	7.25	8.8
Core loss(W/kg)	P0.2/20K<10	P0.2/20K=13

Specification and magnetic parameters
 

Part No.	Core dimensions(mm)  od×id×h	Housing dimensions(mm)  OD×ID×H	Input  Current I(mA)	N1:N2	Output Voltage Uout(mV)
VNL-1	12.1×9.1×3.8	13.4×7.8×5.0	24.7	1:1	0.058-0.088
VNL-2	12.8×9.5×3.2	14.6×7.0×4.8	24.6	1:1	0.05-0.08
VNL-3	12.8×9.6×2.65	14.2×7.7×5	22.5	1:1	0.055-0.095
VNL-4	12.9×8.9×16.7	14.9×6.7×19.3	30	1:1	1.0-1.7
VNL-5	17×10×20	19.2×7.9×22.5	45	1:1	≥1.9
VNL-6	18.5×11.5×16.7	22.0×10.0×19.3	33.3	1:1	1.19-1.78
VNL-7	19×13×10	21.5×10.8×12.2	53.5	1:1	0.59-0.87
VNL-8	19×14×3.2	21.5×12.3×5.4	22.5	1:1	0.07-0.12
VNL-9	18.6×15×4.5	20.6×13.3×6.6	24.6	1:1	0.06-0.09
VNL-10	22×14×16.7	24.2×11.8×19.3	70	1:1	≥1.9

Remarks: customized core available upon request.

Typical Curve: