EN
GSH-VC-1000A Industrial SF6 Vacuum Pump System | SF6 Gas Evacuating Unit
GSH-VC-1000A heavy-duty SF6 vacuum pumping unit: 1000m³/h pumping speed, ≤0.5Pa ultimate vacuum, Roots + rotary vane pump system. Built-in anti-oil-return valve, PLC auto control with vacuum holding, multiple safety protections. Mobile design for GIS installation & maintenance, meets IEC 60480 & DL/T 662.
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
GSH-VC-1000A is a professional industrial-grade SF₆ gas vacuum treatment system designed for power utilities, switchgear manufacturers, EPC contractors and third-party testing institutions. It is dedicated to deep vacuumizing, vacuum drying and constant vacuum holding of large-capacity GIS, EHV SF₆ circuit breakers, instrument transformers and other SF₆-insulated equipment during installation, commissioning and routine maintenance, effectively removing air, moisture and residual gas inside equipment to ensure the insulation performance of refilled SF₆ gas.
It adopts a three-stage vacuum architecture consisting of a Roots booster pump and a two-stage rotary vane backing pump, delivering a rated pumping speed of 1000m³/h and an ultimate vacuum as low as ≤0.5Pa, efficiently meeting the strict vacuum requirements of large-volume high-voltage gas compartments.
A built-in electromagnetic anti-oil-return valve automatically cuts off the gas path during shutdown or power failure, completely preventing pump oil from flowing back into the equipment and causing insulation contamination. The 7-inch PLC touch screen supports one-key fully automatic operation: automatic pumping, real-time vacuum monitoring, constant vacuum holding and automatic shutdown when the target value is reached. With comprehensive safety protection mechanisms and a heavy-duty mobile cabinet structure, it is suitable for both on-site substation operation and fixed workshop production lines, providing efficient, safe and reliable vacuum treatment for SF₆ electrical equipment.
Specifications
| Parameter | Specification |
|---|---|
| System Function | Deep vacuumizing, vacuum drying, constant vacuum holding |
| Vacuum System Architecture | Roots booster pump + two-stage rotary vane backing pump (three-stage) |
| Rated Pumping Speed | 1000 m³/h (at inlet pressure 100Pa) |
| Ultimate Vacuum | ≤ 0.5 Pa |
| Vacuum Measuring Range | 1×10⁵ Pa ~ 1×10⁻¹ Pa, digital display |
| Anti-Oil-Return Device | Built-in electromagnetic cut-off valve, auto shut-off on shutdown/power failure |
| Exhaust Treatment | Oil mist filter |
| Control Mode | PLC + 7" touch screen, fully automatic / manual dual mode |
| Special Functions | Timing vacuum holding, fault self-diagnosis & alarm |
| Safety Protection | Over-current, over-heat, phase-loss, overload protection |
| Cooling Mode | Air-cooled, no external water source required |
| Input Power Supply | AC 380V ± 10%, 50Hz, three-phase |
| Operating Temperature | -10℃ ~ +50℃ |
| Ambient Humidity | ≤ 85% RH (non-condensing) |
| Structure Form | Heavy-duty mobile cabinet type with brake casters and traction handle |
Applications
Core Application Objects
- Large-capacity gas-insulated switchgear (GIS) of 110kV ~ 500kV voltage grade
- EHV SF₆ circuit breakers, gas-insulated busbars and large-capacity instrument transformers
- SF₆ insulated switchgear, ring main units and other gas-insulated electrical equipment
Typical Usage Scenarios
- Power grid operation & maintenance: substation SF₆ equipment major maintenance, fault repair and gas replacement vacuum treatment
- Switchgear manufacturing plants: workshop assembly line vacuumizing, finished product drying and factory quality inspection
- Power engineering EPC companies: large-scale GIS equipment installation, commissioning and project handover acceptance
- Third-party testing institutions: equipment insulation diagnosis and vacuum performance test
- Equipment decommissioning: pre-evacuation before gas recovery and equipment scrapping
Advantages
High-Efficiency Large-Capacity Pumping Performance
Three-stage vacuum system, 1000m³/h high pumping speed → greatly shorten vacuumizing time for large-volume equipment, improve construction and maintenance efficiency
Reliable Anti-Oil-Return Protection
Electromagnetic valve automatic cut-off, completely prevent oil backflow → avoid equipment internal contamination, ensure SF₆ gas insulation performance
Fully Automatic Intelligent Operation
One-key automatic vacuumizing + constant holding + shutdown → reduce operator work intensity, no long-term manual monitoring
Comprehensive Safety Protection Mechanism
Multi-level electrical + mechanical protection → ensure stable and safe long-time continuous operation of the unit
Mobile & Fixed Dual Adaptation
Heavy-duty mobile cabinet design, suitable for both on-site mobile operation and fixed workshop use → wide application scenarios, high equipment utilization
Low Daily Maintenance Cost
Air-cooled design, easy filter element and pump oil replacement → low operation and maintenance cost, long service life
FAQ
Q: What is the function of SF₆ special vacuum pumping unit?
A: Before filling SF₆ gas into new or maintained electrical equipment, deep vacuumizing must be carried out to remove air, moisture and residual impurities inside the equipment. Excessive moisture and air will seriously reduce the insulation performance of SF₆ gas, and even produce toxic decomposition products under arc action. Special vacuum pumping unit is the core equipment to ensure gas quality and safe operation of SF₆ electrical equipment.
Q: What is the difference between this unit and ordinary vacuum pumps?
A: Ordinary vacuum pumps have no targeted anti-oil-return protection, and pump oil easily flows back into the equipment during shutdown, causing oil contamination to the insulation system. GSH-VC-1000A is specially designed for SF₆ electrical equipment, with built-in electromagnetic anti-oil-return valve, gas-ballast moisture removal device and oil mist filter, matching the vacuum process requirements of high-voltage electrical equipment, with higher safety and reliability.
Q: Can it be used together with SF₆ gas recovery units?
A: Yes. It can be used together with GSH series SF₆ gas recovery units to form a complete SF₆ gas treatment workflow: vacuum pumping → gas recovery → purification → refilling. It is recommended to match with GSH-NNA series heavy-duty recovery units for large-capacity GIS projects.
Q: What safety protection does the equipment have?
A: The unit is equipped with comprehensive protection mechanisms: electrical protection includes over-current, over-heat, phase-loss and overload protection; gas path protection includes anti-oil-return electromagnetic valve and over-pressure relief device; the control system has fault self-diagnosis and alarm function, ensuring personnel and equipment safety during long-time continuous operation.
