Product introduction
YSR6-12/24/40.5 series of SF6 Gas Insulated Metal Enclosed switchgear (c-GlS) is independently developed by our company with sulfur hexafluoride gas as the insulating medium and can be applied in primary or secondary power distribution at a same time. lt is a new-generation medium-voltage whole-set switchgear with vacuum arc extinguishing technology, APG solid sealed technology, gas insulation technology and interface insulation technology. The product has passed the type test verification and new product technology appraisal by China’s national authoritative testing institution, The product can be widely used in various important power distribution and substation systems of China’s national economy, such as power distribution and substation network, urban power supply network, large industrial and mining enterprises, petrochemical, metallurgy, urban rail transit and so on.
The product has a modular design and can be combined according to various design schemes. The product has a sealed pressure system and all high-voltage live parts of its main circuit are sealed in the stainless steel gas tank without influence from environments. It runs reliably, is compact with little space occupied and free from maintenance.
Main Technical Parameters
| Item | Unit | Parameter |
| Rated voltage | kV | 12 24 40.5 |
| Rated frequency | Hz | 50 |
| Rated current | A | 630/1250/2500/3150/4000/630/1250/2500 |
| Power frequency withstand voltage (phase-to-phase and phase-to-ground) | kV | 42 65 95 |
| Power frequency withstand voltage (insulation breaking) | kV | 48 79 118 |
| Lightning impulse withstand voltage (phase-to-phase and phase-to-ground) | kV | 75 125 185 |
| Lightning impulse withstand voltage (insulation breaking) | kV | 85 145 215 |
| Rated power frequency withstand voltage of auxiliary circuit | kV | 2 |
| Rated instantaneous withstand current | kA | 25/31.5/40 |
| Rated short-circuit period | s | 3 |
| Rated peak withstand current | kA | 63/80/100 63/80/100 50/63/80 |
| Rated short-circuit breaking current of circuit breaker | kA | 25/31.5/40 25/31.5/40 25/31.5 |
| Rated short-circuit closing current of circuit breaker (peak) | kA | 63/80/100 63/80/100 50/63/80 |
| Rated cable charge breaking current | A | 25 |
| Rated operating sequence | O-0.3s-CO-3min-CO | |
| Insulation gas | SF6 | |
| Mechanical life | Time | 10000 |
| Three-position switch | Time | 5000 |
| Rated charge pressure (abs, 20°C) | Mpa | 0.14 |
| Minimum charge pressure (abs, 20°C) | Mpa | 0.12 |
| Sealed enclosure | Grade | IP67 |
| Switch shell | Grade | UP4X |
| Annual relative leak rate of dry air | %/year | ≤0.1 |
| Rated power voltage of auxiliary circuit | V | DC48/110/220 AC220 |
