33kV 600A Neutral Zig-zag Grounding Reactor Transformer
The 33kV 600A Neutral Zig-zag Grounding Reactor Transformer 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 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 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 provides 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.
- 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
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
33kV 600A Neutral Zig-zag Grounding Reactor Transformer
Neutral Grounding Transformer Nameplate
Neutral Grounding Transformer Outline Drawing
Technical Specifications
Accessories
| Technical Specifications | ||
| Rated Power | 11432.0 kVA | |
| Rating Primary Voltage | 33000 V | |
| Frequency | 50 Hz | |
| Vector Group | ZIG-ZAG | |
| Winding Material | Copper | |
| Impedance | 95.3 ohm | |
| Altitude | ≤2500m | |
| Color | Grey (RAL 7035) | |
| Tank material | Stainless Steel | |
| Insulating Oil Weight | 950 kg | |
| Total Weight | 3400 kg | |
| Outline Dimensions（L×W×H）in. | 2750×1070×1970（mm) | |
| Lifting Lug | Humidity controller |
| Ground Terminal | - |
| Current Transformers | - |
| Tank Cover | Oil Level Gauge |
| Cable Box | Pressure Relief Valve |
| Terminal Box | - |
| HV Bushing | - |
| Temperature Indicator | - |
| Control Box | - |
| Heater | Nameplate |
| 1" Drain Valve With 3/8" Sampler | - |
| 1" Upper Fill Valve Filter Press Connection | - |
| Non-PCB decal | - |
Customization Optional
33kV 600A Neutral Zig-zag Grounding Reactor Transformer
The neutral grounding reactor transformers can be fully customized to meet your specific requirements. The 5kVA Single Phase Pad Mounted Transformer offers a range of optional specifications to cater to specific customer needs. These options may include different insulating oil types (such as mineral oil or biodegradable oil), cable box,stainless terminal box,heaters,humidity controller or high-altitude bushing.
Packing and Shipping
33kV 600A Neutral Zig-zag Grounding Reactor Transformer
NPC Electric grounding reactors are designed to be securely packaged for sea freight, ensuring safe delivery over long distances. We have shipped two 33 kV 600 A Neutral Grounding Reactors to our customer Atlas Chile through our partner Elecnor Chile. To date, we have also supplied two pad-mounted transformers, AAAC conductors, and underground cables to the Subestación Elevadora ESTEPA 220 kV, Parque Fotovoltaico ESTEPA project.
To ensure the high-quality, on-time delivery of this project, NPC Electric established a dedicated project team, strictly adhered to the schedule to complete each process, and successfully passed acceptance inspection and delivered the goods under the client’s full supervision.
To ensure the high-quality, on-time delivery of this project, NPC Electric established a dedicated project team, strictly adhered to the schedule to complete each process, and successfully passed acceptance inspection and delivered the goods under the client’s full supervision.
32
32 years of industry experience
Manufacturer Test
33kV 600A Neutral Zig-zag Grounding Reactor Transformer
Progress Test
NPC Electirc manufacture Grounding transformers have the strict quality control,The Progress Test for Grounding transformers is carried out during the manufacturing process to ensure that the transformer meets all design and quality requirements. These tests include verification of the core insulation, winding resistance, and dielectric strength of the transformer. Additionally, electrical components such as bushings, tap changers, and protection devices are tested for proper functionality. The progress test also checks the transformer’s ability to handle operational loads and voltage fluctuations. Any issues identified during these tests are addressed before moving on to the final testing stages, ensuring that the transformer is reliable, safe, and ready for commissioning. These tests are essential to confirm the transformer’s performance under real-world conditions and compliance with industry standards.
Design Tests
All transformer will be test after finished the production, test items as below:
♦ Insulation Power Factor
♦ Winding Resistance
♦ Impulse Tests
♦ On load Loss Test
♦ No Load Loss Test
♦ Leak Test
♦ DC Insulation Resistance Test
♦ Transformer Turns Ratio/TTR (All Tap Voltages)
♦ Impedance Voltage & Load Loss (Rated Voltage)
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Induced Voltage
♦ Lightning Impulse
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
Transformer Factory Acceptance Test
NPC Electric will tests made for quality control by the manufacturer on every device or representative samples, or on parts or materials as required, to verify during production that the product meets the design specifications.
The Transformer Factory Acceptance Test (FAT) for Grounding transformers is an essential procedure conducted before shipment to ensure the transformer meets all required standards and performs optimally. During the FAT, several critical tests are carried out:
Visual Inspection: Ensuring the transformer’s physical appearance, including the enclosure, bushings, and labeling, meets design specifications.
Electrical Testing: This includes measuring winding resistance, insulation resistance, and verifying the turns ratio to confirm proper electrical functionality.
Protection Device Testing: Confirming that safety features such as surge arresters, tap changers, and other protective components function properly.
The FAT ensures the 30kVA three-phase Oil immersed transformers is reliable, safe, and ready for installation, guaranteeing compliance with industry standards before being dispatched to the customer.
Routine Test - Applied Voltage
Purpose of Testing
The purpose of testing the applied voltage is to verify the insulation strength of the transformer by applying a voltage higher than its normal operating level, ensuring it can withstand potential electrical stresses. This test helps identify any weaknesses or defects in the insulation system before the transformer is put into service.
Testing Equipment
Test equipment: High voltage tester (e.g. TTR, Hipot, etc.)
Voltage source: usually 1 kV, 5 kV, 10 kV, or customized according to customer needs
Temperature and humidity meter: used to record environmental conditions
Voltage source: usually 1 kV, 5 kV, 10 kV, or customized according to customer needs
Temperature and humidity meter: used to record environmental conditions
Pre-Test Preparation
Disconnect the device from the power supply and make sure it is properly grounded and discharged.
Check the connection terminals and wiring to ensure that they are not loose or contaminated.
Test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C).
Check the connection terminals and wiring to ensure that they are not loose or contaminated.
Test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C).
Test Progress
Connect the Test Instrument:
Properly connect the test equipment to the bushings or terminals of the device under test and ensure that all connection points are properly grounded.
Selecting the test voltage:
Select the appropriate applied voltage based on the rated voltage of the equipment.
Properly connect the test equipment to the bushings or terminals of the device under test and ensure that all connection points are properly grounded.
Selecting the test voltage:
Select the appropriate applied voltage based on the rated voltage of the equipment.
Measure and Record
Start the test and record the following parameters:
Measuring leakage current
Applied voltage
Current stability
Any possible voltage fluctuations
Measuring leakage current
Applied voltage
Current stability
Any possible voltage fluctuations
Temperature Correction
If necessary, the measured data is temperature corrected to ensure that it corresponds to standard temperature conditions (usually 20°C).
Repeat Testing (if necessary)
Multiple tests were conducted on different windings (high voltage, medium voltage, low voltage) and bushings, and comparative analysis was performed.
Evaluation Criteria (Reference)
The test was normal and the equipment performed well (qualified)
The current value exceeded the allowable range and the equipment needs to be inspected or maintained (pending repair)
There was a serious fault or instability and the equipment could not continue to operate (unqualified)
The current value exceeded the allowable range and the equipment needs to be inspected or maintained (pending repair)
There was a serious fault or instability and the equipment could not continue to operate (unqualified)
Observing electrical behavior
Observe the electrical behavior of the device under test to ensure that there are no abnormal currents, arcing, noise, or electrical faults.
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Transformers Packaging (1)
Transformers Packaging (2)
Transformers Packaging (3)
Transformers Packaging (4)
Transformers Packaging (5)
Transformers Packaging (6)
Transformers Packaging (7)
Transformers Packaging (8)
Related Products
10kVA Conventional Type Single Phase Pole Mounted Transformer
NPC ELECTRIC specializes in designing and manufacturing 10 kVA single-phase pole-mounted transformers that comply with international standards, including IEEE C57.12.00, IEEE C57.12.20, DOE-2016 Efficiency, CSA C2.1 & C2.2, and CSA C802.1. Our unwavering commitment to excellence drives us to provide tailored solutions, ensuring that each transformer aligns precisely with your unique technical requirements. Regardless of the voltage level or operating environment, you can trust NPC ELECTRIC to deliver the ideal solution to meet your specific needs. Your satisfaction and the reliability of our transformers remain central to our dedication to quality.
50kVA Single Phase Pad Mounted transformer
NPC ELECTRIC 50 kVA pad mounted transformer meets/exceeds DOE 2016 efficiency ratings with UL/cUL listed. Design and production with ANSI/IEEE, CSA standards.NPC ELECTRIC Transformer's 50 kVA single-phase pad-mounted transformer is extensively employed in the North American market. With their wealth of project experience,NPC ELECTRIC Transformer caters to a diverse clientele, including builders, public utility departments, and transformer distributors and retailers.
2000kVA Oil Immersed Transformer
NPC ELECTRIC's 2000kVA oil-immersed transformer uses advanced oil-immersed cooling technology, has excellent heat dissipation performance and high efficiency, and is suitable for various power systems. The transformer complies with international IEC standards and ISO quality management system certification to ensure product reliability and stability. Its design meets environmental protection requirements, has low noise and low vibration, and is widely used in industrial, commercial, and power transmission and distribution systems.
1000kVA Dry Type Transformer
NPC ELECTRIC 1000kVA Dry-Type Transformer offers efficient, oil-free power distribution with a compact design. Equipped with advanced insulation and cooling systems, it ensures safe and reliable operation with minimal maintenance. Ideal for industrial and commercial applications, it provides environmentally friendly and cost-effective performance.
75kVA Single Phase Pad Mounted transformer
NPC ELECTRIC 75 kVA pad mounted transformer meets/exceeds DOE 2016 efficiency ratings with UL/cUL listed. NPC ELECTRIC Transformer offers tailored services for your 75 kVA Transformer project. NPC ELECTRIC Transformer is the transformer manufacturer that gets the most UL&CUL certifications. Yearly, they supply over thousands of transformers to the North American market, catering to diverse industries like Renewables, Utilities, Oil and Gas, Data Centers, Crypto, Building, and many more.
750kVA Oil Immersed Transformer
NPC ELECTRIC's 750kVA oil-immersed transformer uses advanced oil-immersed cooling technology to provide efficient and stable power conversion. The transformer complies with international standards such as the International Electrotechnical Commission (IEC) and ISO 9001, ensuring the high quality and safety of the product. Its sturdy structure and excellent overload resistance are widely used in industrial, commercial, and power network fields.FAQ From Customers
-
What is a Transformer?A transformer is an electrical device used to change the voltage of alternating current (AC). It works on the principle of electromagnetic induction, converting high-voltage current into low-voltage current or low-voltage current into high-voltage current. Transformers are widely used in power transmission, distribution systems, and various electronic devices.
-
What are the main uses of a transformer?The main use of a transformer is voltage conversion. Transformers are used in power transmission systems to help transfer electricity from power plants to consumers. In addition, transformers are also used in electronic devices such as chargers, televisions, power adapters, etc., to adjust the voltage to meet the requirements of different devices.
-
Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
Welcome your inquiry
Honesty, Integrity, Frugality, Activeness and Passion