Oil immersed neutral earthing transformer Manufacturers 27kV 33kV 34.5kV 35kV
| Brand | Vziman |
| Model NO. | Oil immersed neutral earthing transformer Manufacturers 27kV 33kV 34.5kV 35kV |
| Rated voltage | 35kV |
| Zero-sequence Reactance | 144 Ω/phase |
| Series | DKS |
Oil immersed earthing transformer product introduction
Neutral earthing transformer product Features
- Premium Insulation & Heat Dissipation：Our oil immersed earthing transformer is a high-performance variant of neutral earthing transformer, adopting high-purity insulating oil and hermetically sealed tank structure. It delivers superior insulation strength and efficient heat dissipation, ensuring stable operation of the neutral earthing transformer even under long-term grounding fault conditions, with low temperature rise and extended service life.
- Customized Design Capability：We offer tailored neutral earthing transformer solutions, and the oil immersed earthing transformer series can be customized for voltage levels (35kV and below), capacity specifications and installation modes. This flexibility allows the neutral earthing transformer to perfectly match the grounding protection needs of different substations, distribution stations and industrial power systems.
- Dual-Function Integration：All our oil immersed earthing transformer models are built with a continuous rated capacity secondary winding, enabling the neutral earthing transformer to double as a station power source while providing artificial neutral point grounding. This dual-function design reduces equipment investment and installation space, making the oil immersed earthing transformer a cost-effective choice for users.
- Reliable Fault Protection Performance：The neutral earthing transformer we produce is optimized for zero-sequence current conduction, and the oil immersed earthing transformer variant features an enhanced winding structure to ensure stable zero-sequence impedance. When connected to arc suppression coils or resistors, it effectively limits fault current and suppresses transient overvoltage, significantly improving the safety of power systems using the neutral earthing transformer.
Neutral earthing transformer product use
Substations, user distribution stations and other 35kV and below power systems.
Main technical parameters
●Rated capacity:100 ~ 5500kVA；
●Rated voltage: 35kVand below；
●Insulation class: Class A；
●Standard basis: GB1094.6；
●Ambient temperature: -25 ~ +40℃；
●The relative air temperature: the daily average does not exceed 95%, the monthly average does not exceed 90%；
●Altitude; Less than 1000m；
● The ground inclination is not more than 3, with good grounding network；
●Workplace: no fire, explosion risk, no conductive dust, no violent vibration, should leave enough space required by the device.
10kV series oil-immersed grounding transformer technical parameters table
| Type |
Connection group |
Tapping range |
Zero-sequence Reactance (Ω / phase) |
Mounting hole (transverse × vertical)4×18 |
Body size(length ×width×height)mm |
Body weight (kg) |
| DKS-150/10.5 | Zn | 10.5 | 19 | 550×590 | 1150×650×896 | 500 |
| DKS-200/10.5 | Zn | 10.5 | 14 | 550×640 | 1150×700×1113 | 760 |
| DKS-200/10.5-100/0.4 | Znyn11 | 10.5±2×2.5%/0.4 | 14 | 550×640 | 1150×700×1113 | 820 |
| DKS-315/10.5 | Zn | 10.5 | 9 | 550×690 | 1230×750×1176 | 910 |
| DKS-330/10.5-150/0.4 | Znyn11 | 10.5±2×2.5%/0.4 | 9 | 550×690 | 1230×750×1206 | 950 |
| DKS-400/10.5 | Zn | 10.5 | 6 | 550×690 | 1250×750×1181 | 1050 |
| DKS-400/10.5-100/0.4 | Znyn11 | 10.5±2×2.5%/0.4 | 6 | 550×690 | 1250×750×1211 | 1100 |
| DKS-500/10.5 | Zn | 10.5 | 6 | 550×690 | 1300×750×1181 | 1100 |
| DKS-500/10.5-100/0.4 | Znyn11 | 10.5±2×2.5%/0.4 | 6 | 550×690 | 1300×750×1250 | 1150 |
| DKS-630/10.5 | Zn | 10.5 | 4 | 550×790 | 1350×850×1250 | 1350 |
| DKS-630/10.5-200/0.4 | Znyn11 | 10.5±2×2.5%/0.4 | 4 | 550×790 | 1350×850×1286 | 1400 |
| DKS-800/10.5 | Zn | 10.5 | 4 | 550×790 | 1400×850×1295 | 1460 |
| DKS-800/10.5-100/0.4 | Znyn11 | 10.5±2×2.5%/0.4 | 4 | 550×790 | 1400×850×1304 | 1500 |
| DKS-1000/10.5 | Zn | 10.5 | 3 | 550×790 | 1450×850×1408 | 1820 |
| DKS-1000/10.5-100/0.4 | Znyn11 | 10.5±2×2.5%/0.4 | 3 | 550×790 | 1450×850×1450 | 1900 |
Note: The dimensions are for reference only and are subject to the actual drawings and dimensions provided.
Technical parameter table of 35kV series oil-immersed grounding transformer
| Type |
Connection group |
lap range |
Zero-sequence Reactance (Ω / phase) |
Gauge |
Body size(length ×width×height)mm |
Body weight (kg) |
| DKS-400/35 | Znyn11 | 35±2×2.5% | 144 | 1070×1080 | 2100×1200×1465 | 2000 |
| DKS-500/35 | Znyn11 | 35±2×2.5% | 123 | 1070×1080 | 2140×1200×1505 | 2100 |
| DKS-630/35 | Zn | 35±2×2.5% | 119 | 1070×1080 | 2220×1200×1588 | 2520 |
| DKS-630/35-250/0.4 | Znyn11 | 35±2×2.5%/0.4 | 89 | 1070×1080 | 2240×1200×1680 | 2700 |
| DKS-700/35 | Znyn11 | 35±2×2.5% | 98 | 1070×1080 | 2240×1200×1635 | 2600 |
| DKS-700/35-315/0.4 | Znyn11 | 35±2×2.5%/0.4 | 79 | 1070×1080 | 2350×1200×1555 | 3050 |
| DKS-800/35-250/0.4 | Znyn11 | 35±2×2.5%/0.4 | 85 | 1070×1080 | 2240×1200×1805 | 2900 |
| DKS-1000/35-250/0.4 | Znyn11 | 35±2×2.5%/0.4 | 80 | 1070×1080 | 2250×1200×1860 | 3050 |
| DKS-1000/35-315/0.4 | Znyn11 | 35±2×2.5%/0.4 | 75 | 1070×1080 | 2420×1200×1795 | 3350 |
| DKS-1250/35-250/0.4 | Znyn11 | 35±2×2.5%/0.4 | 82 | 1070×1080 | 2300×1200×1935 | 3500 |
| DKS-1700/35-250/0.4 | Znyn11 | 35±2×2.5%/0.4 | 68 | 1070×1080 | 2520×1200×1945 | 4150 |
| DKS-2000/35 | Zn | 35±2×2.5% | 54 | 1070×1080 | 2530×1200×1945 | 4450 |
| DKS-2400/35-400/0.4 | Znyn11 | 35±2×2.5%/0.4 | 44 | 1070×1130 | 2600×1250×2007 | 5000 |
| DKS-2500/35 | Zn | 35±2×2.5% | 40 | 1070×1130 | 2600×1250×2007 | 5100 |
Note: The dimensions are for reference only and are subject to the actual drawings and dimensions provided.
Yes, customization is our strength. Our oil immersed earthing transformer can be tailored for voltage levels (35kV and below), capacity specifications and installation modes according to user needs, perfectly adapting to the grounding protection demands of different substations and distribution stations. All our neutral earthing transformer products, including the oil immersed earthing transformer series, are designed and tested in strict accordance with IEC, ANSI and other international standards, ensuring that the neutral earthing transformer meets the safety and performance requirements of global power systems.
Our oil immersed earthing transformer is a high-reliability variant of neutral earthing transformer, with two core advantages. First, its sealed oil insulation structure delivers stronger voltage resistance and heat dissipation performance than dry-type neutral earthing transformer, ensuring stable operation in harsh outdoor or industrial environments. Second, the oil immersed earthing transformer has a simpler internal structure and lower maintenance requirements, effectively reducing the lifecycle costs of the neutral earthing transformer for users. In addition, our products support dual functions of grounding protection and station power supply, making them more versatile than ordinary neutral earthing transformer.
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