Nanocrystalline Alloy Current Transformer Cores

Introduction:

Higher permeability achieves lower measurement error and higher measurement accuracy. The current silicon steel CT cores cannot achieve the ideal measurement accuracy under the situation of low Ampere-tums or small turn ratios, and the Fe-Ni Perm-alloy core application is limited because of its low magnetization and high cost. However, nano-crystalline cores are getting more widely used in 0.2，0.2s, 0.1 accuracy grade current transformers than precious generations. This is due to their properties of high permeability, high magnetization as well as lower cost in the low Hc field of power supply systems, power energy measurement and control systems, dynamical system, relay protection, etc.

Current transformer can be divided into measuring current transformer and protection current transformer. The measuring current transformer is mainly used in conjunction with measuring instrument to measure current, power and electric energy under normal working state. The protection current transformer cooperating with relay device will cut off the line in case of faults such as short circuit or over current to protect valuable equipment in the line, such as generator and transformer.

Features:

1) High permeability – increase the accuracy of CT.
2) Wide measurement current range.
3) High magnetization – decrease the security factor of CT meter.
4) Excellent temperature stability – from 55 ℃ to 130 ℃.
5) Lower manufacturing costs.

Applications:

• • Precision power meter
  • Electronic watt hour meter
  • Current overload protection in mechanical control
  • Current control in industrial automation
  • Leakage protection switch

Specifications:

Part No.	Core Dimensions IDxODxH(mm)	Finish Dimensions IDxODxH(mm)	Le(cm)	Ae(cm2)	Packing
SK-NACT-101506	10x15x6	8.34×17.92×9.22	3.92	0.11	Case
SK-NACT-132010	13x20x10	11.7×22.24×12.34	5.18	0.26	Case
SK-NACT-152007	15x20x7	13.5×22.14×9.6	5.49	0.13	Case
SK-NACT-172510	17x25x10	15.28×27.88×13	6.59	0.3	Case
SK-NACT-203008	20x30x8	18.06×32.7×9.8	7.85	0.3	Case
SK-NACT-212910	21x29x10	19.05×32.25×13.84	7.85	0.3	Case
SK-NACT-304008	30x40x8	27.3×42.9×11.4	10.99	0.3	Case
SK-NACT-344108	34x41x8	31.22×44.1×10.94	11.77	0.27	Case
SK-NACT-385320	38x53x20	34.8×55.9×23	14.28	1.12	Case
SK-NACT-424830	42x48x30	38.7×51.1×32.6	14.13	0.67	Case
SK-NACT-456530	45x65x30	39.9×69.5×33.4	17.74	2.58	Case
SK-NACT-508025	50x80x25	47.1×84.1×29.3	20.41	2.81	Case
SK-NACT-617010	61x70x10	58.2×73.9×14	20.56	0.33	Case
SK-NACT-7012020	70x120x20	64.8×125.7×25.5	29.83	3.75	Case
SK-NACT-8011025	80x110x25	74.62×115.34×30.14	30.83	2.81	Case

Note: We can also customiz the dimenison of nanocrystalline CT cores according to custom’s requirement.