Product Overview: Introduction of ZHW58A-40.5/72.5Hybrid Gas Insulated Switchgear HGIS(T)
We have developed tank circuit breaker and hybrid switchgear series products early in 2000 to meet China's needs of power construction. Until now, it has acquired around 20 years of experience in relevant manufacturing and operation. The Company has completed the development of Hybrid Gas Insulated Switchgear HGlS(T) to meet the needs of 35-500ky substation reconstruction and expansion. Currently, 2HW58A-40.5/72.5 product has attained the domestically and internationally leading level in terms of technical advancement and quality reliability.
Specifications and Parameters:
| Name | Unit | Data | ||
| Rafed vollage | kV | 40.5 | 72.5 | |
| The altitude | m | ≤3000 | ||
| The environment temperature | ℃ | -40℃～50℃ | ||
| Pollution level | / | IV | ||
| The wind speed | m/s | 34 | ||
| Earthguake resislant level | / | AG5 | ||
| Power frequency withstand voltage,1min | To earth | kV | 95 | 160 |
| Across open breaks | 118 | 160+42 | ||
| Rated lighning impulse withstand voltage | To earth | 185 | 380 | |
| Across open breaks | 215 | 380+59 | ||
| Rated Frequency | Hz | 50/60 | ||
| Rated normal current | A | 2500/4000 | ||
| Rated short circuit breaking current | kA | 31.5/40 | ||
| Rated short circuit duration time | s | 4 | ||
| Circuit breaker class | Times | E2-C2-M2 | ||
| Isolating switch class | Times | M2 | ||
| Earth switch class | Times | E1-M2-B | ||
| Coefficient of opening pole | / | 1.5 | ||
| SF6 gas pressure (gauge pressure 20℃) | MPa | 0.45 | 0.4 | |
Product Features:
Current transformers, isolation, grounding switch combination, compact, lightweight design, which can realize the whole transportation, save area, relative AlS station save covers an area of 70%, suitable for power plant and substation construction, expansion or reconstruction project and rallway electrification construction, especially suitable for old substation upgrading, reduce the construction difficulty and investment scale;
CT is arranged on two sides of the circuit breaker (different from the structure of mainstream manufacturers' similar products), complying with the requirement "blind area of main protection shall be avoided in the configuration of protective current transformer and the allocation of secondary winding" as specified in the Technical Specifications of Relay Protection and Safety Automatic Device, improving the reliability of power supply.
The product also adopts straight-through CT, completely solving problems such as excess moisture and low insulation margin and promoting the insulation resistance and reliability of the product.
The product is configured with a grounding switch on equipment side and line side in a built-in way, with reliable earthing that prevents safety hazards in maintenance.
The circuit breaker adopts light-spring operating mechanism and aluminum frame of integral casting. lts closing-opening springs adopt spiral dual-pressure spring, with a compact and indefatigable structure, realizing a mechanical life of 10000 compressions.
Aviation plugs are used to connect CB, DES & ES mechanism cases and control cabinet, facilitating field installation and commissioning.
The inlet and outlet lines are connected to the equipment through bushings. Composite insulation bushings and porcelain bushings can be selected, Compared with GlS equipment, the enclosed bushings are omitted, and the SF6 gas consumption is less (less than 50% of GlS consumption), which is green and economical.
We offer the most advanced engineering design solutions and product technology solutions to global power customers, and continue to create value for the commercial success of global power customers.
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