High Quality ZCW-72.5 Circuit Breaker
Product Introduction
A combination of disconnectors, earth - mounted switches, earthing switches, transformers, busbars and other components is ingeniously and compactly arranged on the substation ground. This intelligent layout design enables the equipment to occupy only 30 - 50% of the area compared to traditional setups. By significantly reducing the land footprint, it not only provides substantial economic benefits to project investors but also effectively mitigates negative environmental impacts such as soil compaction, thus contributing to sustainable development.
During the entire plant preparation cycle, starting from the meticulous collection of all components to their precise assembly at the installation site prior to the factory launch, remarkable savings in installation time are achieved. Leveraging proven highly productive disconnection chambers and high - quality insulating bushings, this setup is firmly based on a well - tested and reliable design concept. Components are carefully pre - assembled at the factory, which greatly reduces the time - consuming and labor - intensive on - site assembly process.
Moreover, the modular configuration offers great flexibility, allowing for various installation methods to meet different project requirements. Circuit breakers can be conveniently installed either in front of or behind the bushings. Thanks to its advanced design, the energy release time is minimal, ensuring seamless operation and fully meeting the stringent requirements of a three - phase simultaneous opening, thereby enhancing the overall safety and efficiency of the electrical system.
Product Parameters
| Serial Number | Name | Sub - division | Parameter | |||
| 1 | Nominal voltage | 72.5 | ||||
| 2 | Nominal working voltage (1min) | earth | KV | K - 160 | ||
| Between breaks | K - 200 | |||||
| 3 | Nominal impulse withstand voltage | earth | K - 350 | |||
| Between breaks | K - 410 | |||||
| 4 | Withstand voltage at rated voltage during 5 - minute SF6 gas filling | K - 84 | ||||
| 5 | Nominal frequency | HZ | 50 | |||
| 6 | Nominal current | A | 3150 | |||
| 7 | First - order coefficient | 1.5 | ||||
| 8 | Nominal short - circuit making and breaking current | 31.5 | ||||
| 9 | Nominal closing current | KA | 80 | |||
| 10 | Nominal short - circuit making current | 31.5 | ||||
| 11 | Nominal peak withstand current | 80 | ||||
| 12 | Nominal short - circuit duration | S | 4 | |||
| 13 | Nominal current deformation | 8 | ||||
| 14 | Opening current and breaking zone | KA | 90%Ik, 75%Ik | |||
| 15 | Nominal rated operating current | A | 10 | |||
| 16 | Nominal operating sequence | μΩ | O - 0.3s - CO - 180s - CO | |||
| 17 | Resistance of the main circuit | μΩ | O - 0.3s - CO - 180s - CO | |||
| 18 | Nominal relative gas density (20 °C, ambient) | Mpa | 0.5 | |||
| 19 | Sound pressure level/minimum function (20 °C, ambient) | Mpa | 0.45±0.03 | |||
| 20 | Annual gas leakage rate of SF6 | <0.5% | ||||
| 21 | Gas moisture content (V/V) | <150×10⁻⁶ | ||||
| 22 | Mechanical service life | Times | 10000 | |||
| 23 | Radiation level | μV | ≤500 | |||
| 24 | Insulation distance | earth | mm | 2585 | ||
| 25 | Between breaks | 2248 | ||||
| 26 | Weight of each SF6 - filled component | KG | 10 | |||
| 27 | Weight of each circuit breaker | KG | 1300 | |||
Installation Dimensions
