ROCKWILL H59 Grounding Transformer Solution: Zig-Zag Winding & Smart Monitoring para sa mga Neutral Grounding Systems

ROCKWILL H59 Grounding Transformer Solution: Zig-Zag Winding & Smart Monitoring for Neutral Grounding Systems​

Mga Pagnanais na Application:
Pagsasalamin ng neutral point sa mga hindi nagsasariling grounded o resonant grounded na sistema, paglimita ng single-phase ground fault current, pagpapahina ng overvoltage ng sistema.

​I. Mga Solusyon sa Core Design​

1. ​Customized Grounding Transformer​
• Itinayo sa ​H59 oil-immersed transformer platform, gamit ang high-voltage side na may ​Zig-Zag windings​ o ​Yn-d connection​ upang magbigay ng matatag na neutral grounding impedance.
• Nakakumpili sa ​IEC 60076​ at ​NF C52-112 standards, may disenyo ng insulation strength na maaaring tanggihan ang surge ng ground fault current.
2. ​Pagkakataon ng Key Parameters​

1. ​Paggamit ng Paraan ng Grounding​
• ​Resistance Grounding: Secondary side connected to ​stainless steel grid resistor cabinets, limiting fault current to a safe range (Optional: 200A–2000A).
• ​Arc Suppression Coil Grounding: Paired with automatic tuning arc suppression coils to extinguish fault-point arcs.

​II. Mga Teknikal na Advantages​

1. ​Matatag na Structure & Proteksyon​
• ​Fully sealed oil tank: ​IP23 protection rating, suitable for outdoor installation (–25℃ to +50℃).
• ​Epoxy resin bushings: High-voltage side uses ​33kV-grade T-type cable terminations (EPDM material)​, ensuring insulation reliability in humid environments.
2. ​Intelligent Monitoring System​
• Integrated ​DGPT2/DMCR protection relays​ for real-time monitoring of:
  ✓ Neutral point current/voltage
  ✓ Oil temperature (55℃ max. temperature rise)
  ✓ Oil level & pressure transients
  ✓ Fault gases (H₂, CH₄) content.
3. ​High Efficiency & Energy Saving​
• ​Copper windings + ONAN cooling: No-load loss ≤0.2% of rated capacity (e.g., 1300W for 630kVA).
• ​Efficiency >98.5%​​ (at full load, cosφ=1), meeting green grid standards.

​III. Mga Serbisyo ng Engineering Adaptation​

1. ​Customized Configuration​
• Bushings creepage distance customized for altitude (>1000m requires reinforced insulation) and pollution levels.
• Optional add-ons:
• ​5-position non-excitation tap changer (±2×2.5%)​​
• ​Stainless oil valves & anti-vibration roller bases​.

​IV. Typical Case Parameters​

​V. Service Commitment​

• ​10-year warranty: Lifelong maintenance for seals and windings.
• ​48-hour response: Technical support hotline ​​+86 577 27869969.
• ​Documentation provided: Grounding calculation reports, type test certificates (including temperature rise & short-circuit tests).

​Note: This solution requires user-provided parameters (e.g., system short-circuit capacity, capacitive current) for precision engineering. Rockwill engineers will customize designs accordingly.