Neutral Zig-zag Grounding Reactor Transformer 20kV 22kV 33kV
Key attributes
| Brand | Vziman |
| Series | JDS |
Product descriptions from the supplier
Description
Neutral grounding transformer Description
The neutral grounding transformer—specifically the zig zag grounding transformer model—is a high-performance grounding solution designed to meet the strict requirements of IEC 60076-1, IEC 60076-5, IEC 60076-20, and GB/T 1094.6 standards, with oil quality tested according to ASTM D6871.
This zig zag grounding transformer, as a specialized type of neutral grounding transformer, is engineered to provide effective neutral grounding, enhanced system stability, and fault current limitation in medium- and high-voltage networks. With a primary voltage of 33kV and 11432.0kVA rating, the neutral grounding transformer supports 100A power rating for 10 seconds, making it ideal for system grounding applications in substations, industrial facilities, and renewable energy projects.
The ONAN cooling method equips the zig zag grounding transformer with efficient heat dissipation for continuous operation, while the use of high-grade mineral insulating oil ensures long-term performance and compliance with international safety standards. Whether deployed in grid substations or new energy power plants, this neutral grounding transformer delivers reliable and stable grounding protection for critical power infrastructure.
Zig zag grounding transformer product Features
- Compliant with International & National Standards：This zig zag grounding transformer, as a high-performance variant of neutral grounding transformer, strictly complies with IEC 60076 series and GB/T 1094.6 standards, with its insulating oil quality meeting ASTM D6871 requirements. The standardized design ensures the neutral grounding transformer can be seamlessly integrated into global medium and high-voltage power grid systems.
- Excellent Fault Current Limitation Performance：The zig zag grounding transformer adopts a unique zig-zag winding structure, which enables the neutral grounding transformer to effectively limit fault current during single-phase grounding faults, supporting a 100A power rating for 10 seconds. This feature significantly improves the stability and safety of power grids when faults occur.
- Efficient Heat Dissipation & Stable Operation：Equipped with an ONAN cooling system, the neutral grounding transformer realizes efficient heat dissipation for continuous operation. The use of high-grade mineral insulating oil further enhances the insulation and heat resistance performance of the zig zag grounding transformer, ensuring long-term reliable operation without frequent maintenance.
- High Capacity & Wide Voltage Adaptability：With a primary voltage of 33kV and a rating of 11432.0kVA, this neutral grounding transformer has strong load-bearing capacity. The zig zag grounding transformer design is suitable for medium and high-voltage networks, meeting the grounding protection needs of large-scale power supply systems.
Neutral grounding transformer technical parameters
- Primary Voltage Ratings：33000V 11432.0kVA
- Secondary Voltage Ratings ：Customized
- H.V. Tap Range：± 2×2.5% HV taps or others
- Type：Neutral Grounding Reactor
- BIL：Others
- Standards：IEC 60076-1：IEC60076-5: IEC60076-20 GB/T 1094.6 Oil Test standard ASTM D6871
- Application：220kV Substation Project
- Power Rating：33kV 100A 10s
- Certificate：CNAS
- Cooling Method：ONAN
- Oil：Mineral Oil
- Opeartion：Grounding
Zig zag grounding transformer Application Scenarios
- Urban & Industrial Substations：Urban backbone substations and large industrial plant substations face high requirements for power supply stability and fault handling capabilities. The zig zag grounding transformer serves as a core neutral grounding transformer in these scenarios, effectively limiting short-circuit current and preventing fault expansion. It is especially suitable for 33kV substations with dense loads, ensuring the safe operation of key equipment such as transformers and switchgear.
- Renewable Energy Power Generation Projects：Wind farms and photovoltaic power plants have unstable grid-connected current and are prone to single-phase grounding faults. The neutral grounding transformer can provide a stable artificial neutral point for grid-connected systems, and the zig zag grounding transformer’s excellent fault current limitation performance can effectively suppress the impact of new energy output fluctuations on the power grid, improving the reliability of grid connection.
- High-Reliability Industrial Facilities：In mines, metallurgy, and chemical industries with harsh operating environments and high power supply reliability requirements, the zig zag grounding transformer (a specialized neutral grounding transformer) can adapt to complex working conditions. Its stable operation performance and strong fault handling capabilities can avoid power outages caused by grounding faults, ensuring the continuous operation of production lines.
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Q: What advantages does the Neutral Zig-zag Grounding Reactor Transformer have over conventional neutral grounding transformer for medium-voltage power grids?
A:
The zig zag grounding transformer is a specialized high-performance variant of neutral grounding transformer, with its core advantage lying in the unique zig-zag winding structure. This structure enables the zig zag grounding transformer to efficiently block positive and negative sequence currents while allowing zero-sequence currents to pass smoothly during faults, which is more targeted than the general neutral grounding transformer in limiting single-phase grounding fault currents. In addition, this zig zag grounding transformer is optimized for medium-voltage systems, featuring better voltage adaptability and operational stability, making it a more reliable choice for substations and industrial facilities in this voltage range compared to ordinary neutral grounding transformer.
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