ZN85-40.5 is a 40.5kV (33kV/35kV) indoor AC vacuum circuit breaker (VCB) with handcart design, solid-embedded poles and spring operating mechanism. It features compact size, excellent insulation and long service life, widely used in medium-voltage power distribution.
The ZN85-40.5 is a handcart-type indoor high-voltage vacuum circuit breaker with a rated voltage of 40.5kV (compatible with 33kV/35kV applications).
It adopts advanced vacuum arc-extinguishing technology and solid-embedded pole structure, with strong breaking capacity, high insulation level and long mechanical life.
The breaker is mainly used for control and protection of power equipment in power plants, substations, industrial and mining enterprises, and is especially suitable for occasions requiring frequent closing and opening operations.
1. Handcart-Type Design: Integrates breaker body and mobile chassis, equipped with lead screw nut propulsion device and overrunning clutch, enabling smooth movement and accurate positioning in KYN61-40.5 switchgear.
2. Solid-Embedded Pole: Each pole is sealed in epoxy resin insulating cylinder, forming composite insulation structure. It reduces overall size, improves electric field distribution and enhances protection against dust and moisture.
3. Reliable Spring Mechanism: Adopts dedicated spring energy storage mechanism with matched output curve, ensuring fast closing/opening, stable performance and maintenance-free operation up to 30,000 times.
4. Complete Interlock Protection: Equipped with mechanical interlock device to meet “five-prevention” requirements, preventing misoperation and ensuring personal and equipment safety.
Excellent Insulation Performance: Solid-embedded pole and composite insulation structure provide high withstand voltage level, suitable for harsh environments such as high humidity and pollution.
Strong Breaking Capacity: Adopts high-performance vacuum interrupter, with rated short-circuit breaking current up to 31.5kA, ensuring reliable interruption of fault current.
Long Service Life & Low Maintenance: Mechanical life up to 30,000 times, wearing parts are few, and the mechanism is maintenance-free, reducing operation and maintenance costs.
Wide Compatibility: Mainly matched with KYN61-40.5 switchgear, also compatible with JYN1-40.5, XGN17-40.5 and other 40.5kV indoor switchgears.
| Item | Unit | Parameter |
| Tegangan pengenal | KV | 40.5 |
| Frekuensi yang dinilai | HZ | 50 |
| Nilai saat ini | A | 1250 1600 2000 |
| Nilai arus pemutusan hubung singkat | KA | 25 31.5 40 |
| Nilai arus pengalihan arus pendek (Nilai puncak) | KA | 63 80 100 |
| Nilai puncak yang dinilai menahan arus | KA | 25 31.5 40 |
| Nilai puncak yang dinilai menahan arus | KA | 63 80 100 |
| Frekuensi daya dengan tegangan tahan | KV | 95 |
| Tegangan tahan impuls petir (Nilai puncak) | KV | 185 |
| Urutan operasi yang dinilai | O-0.3s-CO-180s-O | |
| Memutus frekuensi arus di bawah nilai hubung singkat | Kali | 20 |
| Kehidupan mekanis | 10000 | |
| Waktu istirahat | ms | ≤80 |
| Arus pemutusan bank kapasitor tunggal | A | 630 |
| Arus pemutusan bank kapasitor dari belakang ke belakang | 400 | |
| Tegangan operasi terukur | V | DC/AC: 100/200 |
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