VTB-40.5(ZN85)
The VTB-40.5P series indoor high-voltage AC vacuum circuit breaker is suitable for power systems with a rated voltage of 40.5 kV and a three-phase AC frequency of 50 Hz. It is a new generation of vacuum circuit breaker independently developed by our company. It adopts a modular integrated spring operating mechanism, boasting superior mechanical performance, especially suitable for frequent operation and multiple short-circuit current interruptions. The circuit breaker can be used as a fixed installation unit or paired with a dedicated propulsion mechanism to form a handcart unit; it also features reliable mechanical interlocking.
| Parameter name | Unit | Parameter value |
| Rated Voltage | kV | 40.5 |
| Rated frequency | HZ | 50 |
| Rated current | A | 630/1250/1600/2000/2500/3150/4000 |
| Power frequency withstand voltage (1min) – phase-to-phase/phase-to-ground | kV | 95 |
| Power frequency withstand voltage (1min) – fracture | kV | 118 |
| Power frequency withstand voltage (1min) – Auxiliary and control circuits | kV | 2 |
| Lightning impulse withstand voltage – phase-to-phase/phase-to-ground | kV | 185 |
| Lightning impulse withstand voltage – fracture | kV | 215 |
| Rated short-circuit breaking current | kA | 25/31.5/40 |
| Rated short-circuit making current | kA | 63/80/100 |
| Rated peak withstand current | kA | 63/80/100 |
| Rated short-time withstand current | kA | 25/31.5/40 |
| Rated short-circuit duration | S | 4 |
| Rated operation sequence | – | O-0.3s-CO-180s-CO |
| DC component of rated short-circuit breaking current | % | 42 |
| Rated short-circuit breaking current and breaking times | time | 50 (when 1250A and 31.5kA or below), 30 (when 1600A or 40kA or above) |
| mechanical life | time | 20000 (when 1250A and 31.5kA or below), 10000 (when 1600A or 40kA or above) |
| Rated cable charging breaking current | A | 50 |
| Rated out-of-phase grounding breaking current | kA | 21.8/27.4/34.8 |
| Rated out-of-step breaking current | kA | 6.25/7.87/10 |
| Rated operating voltage | V | AC/DC 220V、AC/DC 110 |
| Vacuum degree of vacuum arc-extinguishing chamber | Pa | S1.33×10-3 |
*We respect your confidentiality and all information are protected.
I’m Leo, the head of sales team at Huaxiang. Me and my team would be happy to meet you and learn all about your business, requirements and expectations.
*We respect your confidentiality and all information are protected.
I’m Leo, the head of sales team at Huaxiang. Me and my team would be happy to meet you and learn all about your business, requirements and expectations.
