Chongqing Bosun Electrical Co., Ltd.
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4 Phase Power Supply Substation for Electrical Grid Systems and for Highway
Product Description
Components
• Transformers are the key equipment that converts between voltage levels. Different types are used based on power requirements.
• Circuit breakers like oil, vacuum, and SF6 breakers are used for fast isolation and protection. They have interrupting and short-circuit ratings that match system faults.
• Switches like disconnect switches and load-break switches are used to isolate lines for maintenance.
• Surge arresters reduce overvoltages from lightning, switching, and faults. They divert excess voltage to ground.
• Current transformers and potential transformers are used for metering, protection and control. They provide isolated low voltage outputs.
Design consideration
• Layout - Components are arranged to optimize space usage, accessibility, future expansion, and segregation by voltage class.
• Cooling - Adequate ventilation, heat sinks and cooling systems are provided based on ambient conditions and equipment heat loads.
• Grounding - A low impedance grounding system is used to limit hazardous voltages under fault conditions.
• Insulation - Components are insulated based on the highest system voltage plus adequate safety margins.
• Control - Substations often use remote terminal units to facilitate SCADA control and monitoring over long distances.
• Security - Perimeter security, monitoring systems and personnel access restrictions enhance physical security.
Layouts
• Indoor substations have all equipment housed in a building for protection from weather. They require foundations, walls and roofs.
• Outdoor substations have equipment installed directly in the open air. They require less civil works but are exposed to weather.
• Modular/factory-built substations are assembled from prefabricated modules or containers that are transported and installed on-site.
• GIS (gas insulated switchgear) substations utilize SF6 gas as an insulating medium instead of air. They have a compact footprint.
Specification
| Rated Voltage | 12/17.5/24kV | 36kV |
|
Standard applicable | IEC 62271 – 202 (IEC 61330) | IEC 62271 – 202 (IEC 61330) |
| Normal ambient temperature | 40 ° C | 40 ° C |
| Maximum ambient temperature | 50 ° C | 50 ° C |
| Enclosure construction | Modular | Modular |
| Ventilation | Natural | Natural |
| Temperature class (Std.) | K 10 | K 10 |
| MV and LV compartment | IP 54 | IP 54 |
| Transformer compartment | IP 23 | IP 23 |
| Rated voltage (kV) | 12/24kV | 36kV |
| Power frequency (kV rms) | 28/50 | 70 |
| Impulse (kV p) | 75/125 | 170 |
| Rated frequency (Hz) | 50/60 | 50/60 |
| Rated normal current (A) | 630 | 630 |
| Breaking capacity (A) | 630 | 630 |
| Making capacity (kA) | 52.5 / 40 | 50 |
| Rated normal current (A) | 630 | 630 |
| Breaking capacity (kA) | 21/16 | 20 |
| Making capacity (kA) | 52.5 / 40 | 50 |
| Rated power (kVA) – oil type | 2500 | 2000 |
| Rated power (kVA) – Dry type | 2500 | 2000 |
| Rated secondary voltage (V) | 433 | 433 |
| Vector group | Dyn 11 | Dyn 11 |
| Tapping range | + 5 in steps of 2.5% | + 5 in steps of 2.5% |
| IP | Yes | Yes |
| Internal arc | Yes | Yes |
| Enclosure class | Yes | Yes |
| Impact test | Yes | Yes |
| Short circuit test on earthing | Yes | Yes |
Team Show
1.Professional team
2.Comprehensive services
3.Strict quality control
4.Comprehensive inspection
5.Responsibility guarantee
Design
Why Choose Us
1.Our Expertise
2.Quality Products/Services
3.Competitive Pricing
4.Innovation
6.Possibles
7.Authorization by ABB Schneider Siemens