Indoor single-phase epoxy resin casting current transformer complying with GB/T20840.1/2 and IEC61869-1/2 standards; rated insulation level 40.5/95/185kV, rated frequency 50/60Hz, rated secondary current 5A or 1A. Two-winding and three-winding configurations are optional; primary current covers 20–2000A; multi accuracy classes including 0.2(S),0.5(S),10P10,10P20 with rated output ranging 15–50VA; two-winding type weight 50kg, three-winding type weight 95kg; ambient operating temperature -5℃~+40℃.
Indoor 35kV class current transformer for medium voltage switchgear; suitable for protection and metering in indoor applications.
| Paramètre | Spécification | Vérification |
|---|---|---|
| Type de produit | Current Transformer | [On Request] |
| Code modèle | LZZB-J7-35-Q | 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
For current transformer: connect primary in series with the line. Secondary terminals: 1S1/1S2 for metering, 2S1/2S2 for protection. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Follow IEC 61869-2 terminal conventions.
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 40.5kV system; power-frequency withstand 95kV; lightning impulse withstand 185kV peak.
Q : What are the available secondary currents?
R : Secondary current is 5A or 1A.
Q : Can this CT be used outdoors?
R : No, it is designed for indoor use only.
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 | Rated secondary output (VA) | Short-time thermal current Ith (kA) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|
| 20 | 0.2/0.5(0.5)/0.5 0.5/0.5/0.5 0.2/0.5/0.5 0.2/0.5/0.5 | 15 15 25 | 1.3 | 3.25 | 95 |
| 30 | — | — | 2 | 5 | — |
| 40 | — | — | 3 | 7.5 | — |
| 50 | — | — | 4.5 | 11.5 | — |
| 75 | — | — | 6 | 15 | — |
| 100 | — | — | 8 | 22.5 | — |
| 150 | — | — | 12 | 30 | — |
| 200 | — | — | 16 | 45 | — |
| 300 | — | — | 20 | 50 | — |
| 400 | — | — | 25 | 63 | — |
| 500 | — | — | 36 | 90 | — |
| 600 | — | — | 40 | 100 | — |
| 800 | — | — | 50 | 125 | — |
| 1000-1500 | — | — | 63 | 160 | — |
| 1500-2000 | — | — | 80 | 200 | — |
Dessin d'encombrement et de dimensions du LZZB-J7-35-Q — cliquez sur l'image pour zoomer / afficher l'original.
