315kVA Oil-Immersed Grounding Transformer for Industrial Distribution Network Grounding Protection
Key attributes
| Brand | Vziman |
| Model NO. | 315kVA Oil-Immersed Grounding Transformer for Industrial Distribution Network Grounding Protection |
| Rated voltage | 38.5kV |
| Rated frequency | 50/60Hz |
| Rated capacity | 31500kVA |
| Series | SJD13 |
Product descriptions from the supplier
Description
Product Introduction
Vziman oil-immersed grounding transformer is a special power system transformer for neutral point grounding. Used mainly in ungrounded systems or those grounded via arc suppression coils, it establishes an artificial neutral point to enable grounding protection, voltage measurement, or arc suppression coil connection during system faults.
Product Advantages
- Strong Functional Adaptability: Special windings build low-impedance zero-sequence paths for stable fault current, enabling relay protection. They work with arc suppression coils (to extinguish arcs) or grounding resistors (to limit current)—a unique edge over distribution transformers.
- Efficient Design: Small capacity (1/10-1/5 of distribution transformers) cuts redundancy. Integrated "grounding + station service" design saves cost and space.
- Stable Fault Performance: Special windings ensure stable zero-sequence impedance for accurate protection. Optimized windings/insulation withstand <10s high current impacts and strong mechanical forces.
- Flexible Adaptability: Better heat dissipation in narrow spaces. Lower long-term costs vs using distribution transformers (which need extra grounding devices, risking reliability).
Operating Conditions
- Ambient Temperature: Maximum: +40℃; Minimum: -25℃ (Wider temperature ranges available)
- Relative Humidity: ≤90% (Higher protection levels available)
- Altitude: ≤1000m (Special designs for higher altitudes available)
Scope of Application
Scope of application: Vziman oil-immersed grounding transformers are mainly used in medium-low voltage non-effectively grounded systems, for scenarios like neutral point extraction, capacitive current compensation, grounding fault handling and zero-sequence parameter monitoring. They are especially suitable for distribution networks, small power generation systems, and industrial/civil power networks with high power supply reliability requirements. areas).
Product Specifications
| Rated Capacity | H.V. | L.V. | Connection symbol | No-load loss(kw) | On-load loss(kw) | ||||
| S18 | S20 | S22 | S18 | S20 | S22 | ||||
| 3150 |
35 38.5 ± 5/2*2.5% |
6.3 6.6 10.5 11 |
Dd11 | 2.4 | 2 | 1.7 | 21.9 | 20.7 | 20.7 |
| 4000 | 2.9 | 2.3 | 2 | 25.9 | 24.6 | 24.6 | |||
| 5000 | 3.5 | 2.8 | 2.4 | 29.7 | 28.2 | 28.2 | |||
| 6300 | 4.2 | 3.4 | 2.9 | 33.3 | 31.5 | 31.5 | |||
| 8000 | 5.8 | 4.7 | 4 | 36.5 | 34.6 | 34.6 | |||
| 10000 | 7 | 5.7 | 4.8 | 46 | 40.8 | 40.8 | |||
| 12500 | 8 | 6.5 | 5.5 | 51.1 | 48.4 | 48.4 | |||
| 16000 | 9.7 | 7.9 | 6.7 | 62.5 | 59.2 | 59.2 | |||
| 20000 | 11.5 | 9.4 | 7.9 | 75.5 | 71.6 | 71.6 | |||
| 25000 | 13.6 | 11.1 | 9.4 | 89.3 | 84.6 | 84.6 | |||
| 31500 | 16.2 | 13.1 | 11.1 | 106.4 | 100.8 | 100.8 | |||
Documentation Resource Library
Restricted.
Vziman IEC/ ANSI Oil-immersed Grounding Transformer selection catalog
Catalogue
English
Consulting
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