Indoor single-phase epoxy resin casting current transformer complying with GB/T20840.1/2 and IEC61869-1/2 standards. Insulation level:12/42/75kV, rated frequency 50/60Hz, secondary rated current 5A or 1A. Optional primary current ranges:20-200A、300-400A、500A、600-800A; accuracy combinations of 0.2S/10P、0.5S/10P with rated output 10VA0.2S、10VA0.5S、15VA10P. Matched short-time thermal current and rated dynamic current for each specification, net weight 17kg, operating temperature -5℃~+40℃, applied for metering and relay protection in medium-voltage switch cabinets.
Indoor 10kV epoxy cast current transformer for metering and protection in MV switchgear. Suitable for 50/60Hz systems with secondary 5A or 1A.
| Paramètre | Spécification | Vérification |
|---|---|---|
| Type de produit | Current Transformer | IEC 61869 / GB/T 20840 |
| Code modèle | LZZB-10 | Marquage de la plaque constructeur |
| Tension primaire | 0.66kV | Essai de tension nominale (IEC 61869-1/3) |
| Tension secondaire | 5A/1A | Vérification du rapport à la fréquence nominale |
| Classe de précision | 5P/10P | 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) | [On Request] | Tenue à fréquence industrielle et au choc de foudre |
| Normes | IEC 61869 / GB/T 20840 | Certifié selon les normes listées |
| Fréquence | 50/60Hz | Selon IEC 61869-1 |
| Environnement | [On Request] | Selon les limites de la fiche technique |
Idéal pour
Non recommandé pour
Connect primary through bushing. Secondary terminals: 1S1-1S2 for metering, 2S1-2S2 for protection (if present). 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 : IEC 61869 / GB/T 20840
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q : What is the insulation level of this CT?
R : The insulation level is 12/42/75kV, meaning 12kV highest voltage for equipment, 42kV power-frequency withstand, and 75kV lightning impulse withstand.
Q : Can this CT be used outdoors?
R : No, it is designed for indoor use only, as it is an indoor single-phase epoxy resin casting type.
Q : What accuracy classes are available?
R : It offers accuracy combinations of 0.2S/10P and 0.5S/10P, suitable for both metering and protection.
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 I1n (A) | Accuracy classCombined | Accuracy class & rated output (VA) COSΦ=0.8 0.2 (S) | Accuracy class & rated output (VA) COSΦ=0.8 0.5 (S) | Accuracy class & rated output (VA) COSΦ=0.8 10P10 | Short-time thermal current Ith (kA/S) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 20-200 | 0.2(S)/10P | 10 | 10 | 15 | 150 I1n | 375 I1n | 17 |
| 300-400 | 0.2(S)/10P | 10 | 10 | 15 | 45 | 112.5 | 17 |
| 500-600 | 0.5(S)/10P | 10 | 10 | 15 | 60 | 150 | 17 |
| 600-800 | 0.5(S)/10P | 10 | 10 | 15 | 60 | 150 | 17 |
Dessin d'encombrement et de dimensions du LZZB-10 — cliquez sur l'image pour zoomer / afficher l'original.
