Product Overview:
The ZN85-40.5 indoor high voltage vacuum circuit breaker is designed for medium to high voltage indoor electrical distribution systems. This circuit breaker provides reliable and safe interruption of electrical currents, protecting electrical equipment and enhancing the stability of the power distribution network. It is suitable for use in industrial, commercial, and utility applications.
Structural Features:
Installation Method:
Applicable Environmental Conditions:
| Item | Unit | Data | |
|---|---|---|---|
| Rated voltage | KV | 40.5 | |
| Rated frequency | HZ | 50 | |
| Rated current | A | 1250 1600 2000 | |
| 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 |
| power-frequency withstand voltage 1min | KV | 95 | |
| Lightning impulse withstand voltage(peak) | 185 | ||
| Rated operating sequence | O-0.3S-CO-180S-CO | ||
| Rated short-circuit breaking current breaking times | time | 20 | |
| Mechanical life | time | 10000 | |
| Breaking time | ms | ≤80 | |
| Individual capacitor bank breaking current | A | 630 | |
| Back-to-back capacitor bank breaking current | A | 400 | |
| Rated operation voltage | V | -110/-110,-220/-220 | |
The ZN85-40.5 indoor high voltage vacuum circuit breaker is an essential component in the electrical infrastructure of various industries, designed to operate within the demanding parameters of indoor high-voltage equipment. Rated for a voltage of 40.5KV and compatible with three-phase AC systems operating at 50Hz, this breaker is tailored to meet the stringent requirements of industrial and mining enterprises, power plants, and substations. In the event of a fault, the ZN85-40.5 is capable of interrupting short circuit currents, a critical safety feature that prevents catastrophic damage to equipment and potential hazards to personnel.
The circuit breaker is mainly composed of conductive circuit, arc extinguishing system, insulation system and operating system. The dynamic conductive rod of the arc extinguishing chamber is connected with the operating mechanism through the insulating tie rod and the transmission connecting rod.
1. Closing operation: operating mechanism 9 by the motor to the closing spring energy storage. After the closing electromagnet action, the closing spring through the CAM and connecting rod 8 to drive the arm 7 counterclockwise rotation, the arm drive connecting rod 6 and screw 5 upward movement, complete the closing operation. At the same time, the opening spring and the contact pressure spring are stored. Make the interrupter contact to maintain a certain pressure, but also for the opening operation to prepare.
2. Opening operation: After the opening electromagnet is energized, the closing bullet in the operating mechanism is released, and the dynamic guide rod of the arc extinguishing chamber moves downward under the driving of the opening spring, so that the vacuum extinguishing chamber completes the opening operation.
3. Manual energy storage operation: Insert the manual energy storage operation handle into the jack of the operating mechanism, and then swing left and right (about 60), using one-way bearings to complete the energy storage of the closing spring. After the energy storage, you can manually press the closing and opening buttons to realize the closing and opening operation.
The compact and integrated design of the ZN85A-40.5 facilitates easier maintenance and inspection, contributing to lower downtime and maintenance costs.
The circuit breaker is designed to operate effectively in various environmental conditions, ensuring consistent performance and reliability.
