Indoor single-phase epoxy resin casting current transformer complying with GB/T20840.1/2 and IEC61869-1/2 standards; rated insulation level 24/65/125kV, rated frequency 50/60Hz, rated secondary current 5A or 1A. Two optional structures: 2s and 4s, primary current optional range 20-3150A. 2s model weight is 43kg with rated output 15-30VA at different accuracy grades; 4s model weight is 70kg with rated output 15-30VA at different accuracy grades; short-time thermal current ranges 31.5-100kA, rated dynamic stable current ranges 80-160kA; ambient operating temperature -5℃~+40℃.
Indoor 24kV epoxy cast current transformer for MV switchgear, offering high thermal/dynamic stability with 2s/4s variants.
| Paramètre | Spécification | Vérification |
|---|---|---|
| Type de produit | Current Transformer | [On Request] |
| Code modèle | LZZBJ9-24-220b-2s-4s | Marquage de la plaque constructeur |
| Tension primaire | 10kV | Essai de tension nominale (IEC 61869-1/3) |
| Tension secondaire | 5A/1A | Vérification du rapport à la fréquence nominale |
| Classe de précision | [On Request] | Essai de précision (IEC 61869-2 / IEEE C57.13) |
| Charge nominale | [On Request] | Essai de charge à la puissance VA nominale |
| Type d'isolement | Dry Epoxy Resin | Essais diélectriques selon la norme |
| Niveau d'isolement (BIL) | 12/42/75kV | Tenue à fréquence industrielle et au choc de foudre |
| Normes | [On Request] | Certifié selon les normes listées |
| Fréquence | 50/60Hz | Selon IEC 61869-1 |
| Environnement | Ambient: -5℃~+40℃ | Selon les limites de la fiche technique |
Idéal pour
Non recommandé pour
secondary terminals 1S1/1S2 (protection winding 2S1-2S2). Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Follow IEC 61869-2 terminal markings.
Conforme à : [On Request]
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q : What is the insulation level of this CT?
R : The insulation level is 24/65/125kV, meaning 24kV system voltage, 65kV power-frequency withstand, and 125kV lightning impulse withstand.
Q : What are the available secondary currents?
R : The secondary current is 5A or 1A, selectable as per requirement.
Q : What is the difference between 2s and 4s models?
R : The 2s model weighs 43kg, while the 4s model weighs 70kg; both offer rated outputs of 15-30VA, but differ in primary current range and physical dimensions.
Les champs manquants sont marqués [On Request] — jamais inventés. Les lignes de vérification M2/M5/M6 suivent les conventions IEC 61869 / IEEE C57.13.
| Rated primary current (A) | Accuracy classCombined | Accuracy class & rated output (VA) COSφ=0.8 | Short-time thermal current (kA/S) | Rated dynamic current (kA) | Weight (kg) |
|---|---|---|---|---|---|
| 20-200 | 0.2(S)0.2(S) 0.2(S)0.5 0.2(S)5P10 0.5(5P10) | 15/15, 20/20, 20/20, 15/15 | 150/1 | 375/1 | 43 |
| 300 | 0.2(S)0.2(S) 0.2(S)0.5 0.2(S)5P10 0.5(5P10) | 15/15, 20/20, 20/20, 15/15 | 31.5 | 80 | 43 |
| 400-500 | 0.2(S)0.2(S) 0.2(S)0.5 0.2(S)5P10 0.5(5P10) | 15/15, 20/20, 20/20, 15/15 | 45 | 110 | 43 |
| 600-800 | 0.2(S)0.2(S) 0.2(S)0.5 0.2(S)5P10 0.5(5P10) | 15/15, 20/20, 20/20, 15/15 | 63 | 130 | 43 |
| 1000-3150 | 0.2(S)0.2(S) 0.2(S)0.5 0.2(S)5P10 0.5(5P10) | 20/20, 30/30, 30/30, 20/20 | 100 | 160 | 43 |
Dessin d'encombrement et de dimensions du LZZBJ9-24-220b-2s-4s — cliquez sur l'image pour zoomer / afficher l'original.
