ZJ-70
250m3/h Compact Onsite Vacuum Service Unit
- This compact onsite vacuum service unit is mainly used for vacuum drying.
- It can inject oil right into a high voltage transformer, as much as 1000 kV.
- The vacuum pump for power transformer is also extensively used in various kinds of large transformer installations.
- It is used for upkeep for high-efficiency vacuum drying out as well as vacuum pumping.
The ZJ-70 is a compact and mobile vacuum unit designed for on-site maintenance of small and medium-sized transformers up to 110 kV. It features a small footprint and light weight, allowing easy transportation and operation in narrow outdoor substations and remote working sites.
It provides stable and consistent vacuum performance for on site drying and transformer evacuation procedures. By equipping with a dedicated GIS vacuum interface, which can be used to perform complete and reliable SF6 vacuum evacuation for gas insulated switchgear.
| Item | Name of Parameter | Unit | ZJ-70 |
| Technical parameters | Pumping rate | L/s | 70 |
| Limit vacuum | Pa | ≤3 | |
| Pumping level | / | 2 | |
| Working power | / | AC380V 50Hz,3P or as per buyer’s option | |
| Total power | kW | 4 | |
| Vacuum connection | DN | 25 | |
| Size | mm | 1200*950*1600 | |
| Weight | kg | 350 | |
| *Due to different equipment configurations, its dimensions, weight will vary slightly. | |||
1. Compact & Mobile Design
Lightweight and small in size, the unit is easy to transport and deploy without heavy lifting equipment, ideal for frequent on site service.
2. Stable Two-Stage Vacuum System
The two stage pumping structure ensures steady vacuum level and consistent output, guaranteeing reliable and repeatable treatment results.
3. Low Energy Consumption
Optimized power design reduces energy consumption and operating costs, supporting long time continuous field operation.
4. Simple & Intuitive Operation
User-friendly control layout minimizes training time and reduces operational errors for field technicians.
5. Low Maintenance Cost
Robust structure and easily accessible components simplify daily inspection and maintenance, lowering long term operating costs.
1. On-Site Vacuum Drying for 220 kV Transformers
Removes moisture and gas from insulation materials to avoid air and moisture contamination before oil filling.
2. Routine Transformer Maintenance
Used for regular overhaul, fault repair, and performance restoration of small and medium transformers.
3. Small Substation Commissioning
Provides reliable vacuum support for installation, testing, and commissioning of substation equipment.
4. GIS Equipment Vacuum Evacuation
With dedicated GIS interface, it performs standardized vacuum processing for GIS installation and maintenance.
