Disjoncteur à vide haute tension pour intérieur ZN85-40.5kV
Overview The ZN85-40.5/T2000-31.5 indoor high-voltage vacuum circuit breaker is designed for three-phase AC 50Hz systems with a rated voltage of 40.5kV. It is suitable for power plants, substations, and industrial enterprises to handle load current, overload current, and fault currents. This circuit breaker features an advanced upper and lower layout structure, effectively reducing the depth […]
Overview
The ZN85-40.5/T2000-31.5 indoor high-voltage vacuum circuit breaker is designed for three-phase AC 50Hz systems with a rated voltage of 40.5kV. It is suitable for power plants, substations, and industrial enterprises to handle load current, overload current, and fault currents.
This circuit breaker features an advanced upper and lower layout structure, effectively reducing the depth of the breaker. Its spring energy storage mechanism is compactly installed within the frame, seamlessly integrating with the upper and lower components of the breaker as an indivisible part. The design ensures a simplified structure, streamlined output curve, and excellent operational reliability. The ZN85-40.5 breaker is engineered to meet the demanding requirements of 40.5kV vacuum breakers, offering outstanding adaptability for high-frequency operations and various challenging conditions.
Type designation of ZN85-40.5 Vacuum Circuit Breaker
Model Designation for ZN85-40.5 Vacuum Circuit Breaker
- Z: Vacuum circuit breaker.
- N: Indoor type.
- 85: Design sequence number.
- 40.5: Rated voltage (kV).
- □: Rated current (A).
- □: Rated short-circuit breaking current (kA).
Structure features
- Closing Operation: The motor stores energy in the closing spring. When the closing electromagnet is activated, the stored energy moves the mechanism to close the breaker, while also energizing the opening and contact pressure springs to prepare for the next operation.
- Opening Operation: When the opening electromagnet is energized, the operating mechanism trips, and the stored energy in the opening spring drives the arc-extinguishing chamber to complete the opening operation.
- Manual Energy Storage: By inserting a manual handle into the operating mechanism and swinging it left and right (around 60 times), energy is stored in the closing spring. Once stored, the breaker can be manually operated using the opening and closing buttons.
Main technical parameters
| Item | Unit | Data |
|---|---|---|
| Rated Voltage | kV | 40.5 |
| Rated Current | A | 1250 1600 2000 |
| Rated Frequency | Hz | 50 |
| Rated Short-Circuit Breaking Current | kA | 25 31.5 |
| Rated Short-Circuit Making Current (Peak) | kA | 63 80 |
| 4s Rated Short-Time Withstand Current | kA | 25 31.5 |
| Rated Peak Withstand Current | kA | 63 80 |
| 1-Minute Power Frequency Withstand Voltage | kV | 95 |
| Lightning Impulse Withstand Voltage (Peak) | kV | 185 |
| Rated Operating Sequence | O–0.3s–CO–180s–CO | |
| Rated Short-Circuit Breaking Current Operations | Times | 20 |
| Mechanical Life | Times | 10000 |
| Opening Time | ms | ≤80 |
| Single Capacitor Bank Breaking Current | A | 630 |
| Back-to-Back Capacitor Bank Breaking Current | A | 400 |
| Rated Operating Voltage | V | –110/~110, –220/~220 |
Note: For special requirements and specific application scenarios, please contact our technical team for customized solutions.
Environmental Conditions
ZN85-40.5kv Indoor High-Voltage Vacuum Circuit Breaker
Key FAQs About the ZN85-40.5kV Vacuum Circuit Breaker
Q1: What are the key applications of the ZN85-40.5 Vacuum Circuit Breaker?
A: The ZN85-40.5 breaker is primarily used in power plants, substations, and industrial enterprises to manage load currents, overloads, and fault currents in three-phase AC 50Hz systems with a rated voltage of 40.5kV.
Q2: How does the ZN85-40.5 circuit breaker handle frequent switching operations?
A: It features a spring energy storage mechanism and a robust structure, ensuring reliable operation under high-frequency switching conditions with a mechanical life exceeding 10,000 cycles.
Q3: What is the rated short-circuit breaking current of this circuit breaker?
A: The ZN85-40.5 can handle rated short-circuit breaking currents of 25kA or 31.5kA, depending on the specific model.
Q4: What safety measures are included in the breaker design?
A: The breaker includes integrated opening and closing springs, a sealed arc-extinguishing chamber, and reliable insulation to ensure safe operation in high-voltage environments.
Q5: Is manual operation possible for this circuit breaker?
A: Yes, the breaker supports manual energy storage using a handle, allowing manual closing and opening when necessary.
Q6: What are the environmental conditions required for proper operation?
A: The breaker is designed for indoor use at altitudes ≤1000m, ambient temperatures between -25°C and +40°C, and humidity levels ≤95%.
Q7: What customization options are available?
A: The breaker can be tailored for specific voltage levels, current ratings, or unique application requirements. Contact the technical team for custom solutions.
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