· This product is designed and manufactured in compliance with GB and IEC standards.
· Manufactured with a structural design featuring vacuum arc-extinguishing and all-insulated by SF6 gas;
· The air chamber boasts an IP67 protection rating and requires no inflation or refilling throughout the installation process and its entire service life.
· The product meets requirements for altitudes of 5,000 meters and below;
· Suitable for operation in environments with industrial pollution, salt spray, and high humidity; meets C3 standard on land and C4 standard at sea.
· For outdoor or indoor use
· Altitude: ≤5000m (Special note required if the operating altitude of the equipment exceeds 2000m);
· Ambient temperature: Maximum temperature +65℃, minimum temperature -40℃, average value within 48 hours ≤35℃;
· Environmental humidity: Suitable for all humid environments;
· Pollution degree: Level 4 pollution;
· Corrosion resistance class: Offshore C4H;
· Seismic resistance level: AG5 (horizontal acceleration 0.3g, vertical acceleration 0.15g);
· Electromagnetic interference: The amplitude of electromagnetic interference induced in the secondary system ≤ 1.6 kV;
· Installation environment: There should be no explosive or corrosive gases in the surrounding air, and the installation location must be free from frequent, severe vibrations or shocks. Note: If the operating environment exceeds the conditions specified above, please consult with the company to arrange a customized solution.
· GB/T 7674-2020 Gas-insulated metal-enclosed switchgear with rated voltage of 72.5 kV and above
· IEC62271-203:2011 Gas-insulated metal-enclosed switchgear for rated voltages above 52 kV
· IEC60694-2002 Common Technical Requirements for High-Voltage Switchgear and Control Equipment
· GB/T3906-2020 and IEC 62271-200:2011 3.6kV~40.5kV AC metal-enclosed switchgear and control equipment
· GB/T11022-2020 and IEC 62271-1:2017—Common Technical Requirements for High-Voltage Switchgear and Control Equipment
·GB/T1984-2014 and IEC62271-100:2017 – AC High-Voltage Circuit Breakers
· GB/T4208-2017 and IEC60529: Enclosure Protection Ratings (IP Codes)
· GB/T16927.1~2-2013 High-Voltage Test Techniques
· GB/T3309-1989
· GB/T4473-2018
· GB/T5582-1993 Mechanical Tests for High-Voltage Switchgear at Ambient Temperature—Synthetic Testing for High-Voltage AC Circuit Breakers—Contamination Levels of External Insulation for High-Voltage Power Equipment
· GB/T11023-2018 Test Method for Gas Sealing of Sulfur Hexafluoride in High-Voltage Switchgear
· DL/T402-2017 Technical Specifications for Ordering High-Voltage AC Circuit Breakers
· DL/T486-2021 Technical Specifications for Ordering High-Voltage AC Disconnect Switches and Earthing Switches
· DL/T403-2017 Technical Specifications for Ordering 12kV to 40.5kV High-Voltage Vacuum Circuit Breakers
· DL/T404-2018 3.6kV~40.5kV AC Metal-Enclosed Switchgear and Control Equipment
· DL/T593-2016 Common Technical Requirements for Standards of High-Voltage Switchgear and Control Equipment
| Name | Unit | Switchgear and Circuit Breaker Parameters | |
| Rated voltage | kV | 72.5 | |
| Rated frequency | Hertz | 50 | |
| Rated current | A | 630/1250 | |
|
Rated insulation level |
Power-frequency withstand voltage (phase-to-phase, phase-to-ground, vacuum interrupter contacts) | kV | 160 |
| Power-frequency withstand voltage (isolated break) | kV | 160+42 | |
| Power-frequency withstand voltage (auxiliary and control circuits) | kV | 2 | |
| Lightning impulse withstand voltage (phase-to-phase, phase-to-ground, vacuum interrupter) | kV | 380 | |
| Lightning Impulse Withstand Voltage (Isolation Break) | kV | 350 + 60 | |
| Rated short-circuit breaking current | kA | 31.5 | |
| Rated short-circuit breaking operations | Next | 30 | |
| Rated short-circuit making current (main switch/fault-making earthing switch) | kA | 80/80 | |
| Short-time withstand current and duration (main circuit + earthing switch, earthing connection) | kA/s | 31.5/4, 27.5/2 | |
| Rated peak withstand current (main circuit + earthing switch, earthing connection) | kA | 80, 69.6 | |
| Circuit breaker mechanical life | Next | 10000 | |
| SF6 rated pressure | Rated inflation pressure (gauge pressure at 20°C) | MPa | 0.12 |
| Minimum inflation pressure (gauge pressure at 20℃) | MPa | 0.08 | |
| Protection rating | An energized electrical box | IP67 | |
| Cabinet body, cable compartment, cover plate | IP5X | ||
| Annual relative leakage rate of gas | %/year | s0.01 | |
| Mechanical Operation Sequence | 0-0.3s-CO-180s-CO | ||
| Expected service life | Year | 30 | |
| Busbar/Grounding busbar (copper bar) | 240 mm² | ||
| Structural Type | Direct-acting | ||
| Rated voltage | kV | 72.5 | |
| Rated frequency | Hertz | 50 | |
| Rated current | A | 630/1250 | |
|
Rated insulation level |
Power-frequency withstand voltage (phase-to-phase, phase-to-ground) | kV | 160 |
| Power-frequency withstand voltage (isolated break) | kV | 160+42 | |
| Lightning impulse withstand voltage (phase-to-phase, phase-to-ground) | kV | 380 | |
| Lightning Impulse Withstand Voltage (Isolation Break) | kV | 350 + 60 | |
| Short-time withstand current and duration (main circuit + earthing switch, earthing connection) | kA/s | 31.5/4, 27.5/2 | |
| Rated peak withstand current (main circuit + earthing switch, earthing connection) | kA | 80, 69.6 | |
| Mechanical life | Next | 3000 | |
| Expected service life | Year | 30 | |
| Busbar/Grounding busbar (copper bar) | 240 mm² | ||
| Short-time withstand current and duration (main circuit + earthing switch, earthing connection) | kA/s | 31.5/2 | |
| Rated peak withstand current (main circuit + earthing switch, earthing connection) | kA | 80, 69.6 | |
| Mechanical life | Next | 3000 | |
| Expected service life | Year | 30 | |
