1. Features：
ØHigh permeability---- minimized current measuring error in CT
ØHigh saturation Induction ,Low core loss -----Lighten core weight and core size compared to permalloy cores: small size and light weight compared to Permalloy C
ØLower weight, smaller size----cost saving greatly than permalloy
ØExcellent Temperature stability---operation temperature 55～130°C for long time
2 Application：
ØBushing current transformer for Epoxy resin cast, Gas insulated or oil-immersed switchgears, LV, MV and HV switchgear,
ØMetering and protective relaying in the power plants and substations
ØOther apparatus in electric power transmission and distribution system
3 Properties：
Comparison of different materials：
|
Property
|
Nanocrystalline cores
|
permalloy cores
|
Si-steel cores
|
|
Saturate induction (Bs)
|
1.25T
|
0.75T
|
2.03T
|
|
Initial permeability(（µ0)
|
8～12×104
|
5～8×104
|
103
|
|
Maximum permeability（µm）
|
60×104
|
60×104
|
4×104
|
|
Curie temperature（℃）
|
570
|
400
|
740
|
|
Density（g/cm3）
|
7.25
|
8.75
|
7.65
|
|
Stacking factor
|
0.7
|
0.9
|
0.95
|
|
Thickness (mm)
|
0.03
|
0.15
|
0.3
|
3． Specifications and electric parameters:
|
Part No.
|
Core dimensions（mm）
OD×ID×Ht
|
Case dimensions（mm）
OD×ID×Ht
|
|
NC-P 1259025
|
125×90×25
|
130×85×30
|
|
NC-P 14010025
|
140×100×25
|
145×95×30
|
|
NC-P 24518035
|
245×180×35
|
250×175×41
|
|
NC-P 33028540
|
330×285×45
|
335×280×52
|
|
NC-P 37032050
|
370×320×50
|
375×315×57
|
|
NC-P 45541515
|
455×415×15
|
460×410×20
|
|
NC-P 57745620
|
577×456×20
|
584×450×25
|
|
NC-P 67563515
|
675×635×15
|
681×629×20
|
|
NC-P 60046065
|
600×460×65
|
606×454×73
|
|
NC-P 85072025
|
850×720×25
|
857×713×31
|
|
NC-P 105080035
|
1050×800×35
|
1058×792×42
|
Remark：1)To the specification in the form, cores can be made for meeting user's need.
2) The maximal OD size we can make is 1300mm.
3) case material: plastic case, stainless steel, aluminum
|
