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変圧器圧力逃がし装置 – PRD Safety Valve System
Automatic Overpressure Protection | Explosion Prevention | Fast-Acting Relief Valve | 工場直接供給
Responds within milliseconds
No manual intervention required
All-climate operation capability
50kVA to 10MVA+ transformers
変圧器圧力逃がし装置とは何ですか?
あ 変圧器圧力逃がし装置 (PRD) is a critical safety component that prevents catastrophic transformer tank rupture by automatically venting excessive internal pressure. When internal faults generate rapid gas expansion or oil vaporization, the PRD opens instantly to release pressure buildup, protecting the transformer tank from explosive failure.
Also known as a 変圧器安全弁 または 圧力リリーフバルブ, this device acts as the last line of defense against transformer explosions caused by internal arcing faults, 絶縁破壊, or thermal overload conditions.
Why PRDs Are Essential
Internal transformer faults can generate pressure rises exceeding 100 psi within seconds. Without proper pressure relief, this buildup causes violent tank rupture, 石油火災, and severe equipment damage. Transformer explosion prevention devices 提供する:
- 従業員の安全: Prevents dangerous tank explosions near personnel and facilities
- 機器の保護: Safeguards expensive transformer assets from catastrophic structural damage
- Fire Prevention: Controlled venting reduces risk of ignition and oil fires
- Insurance Compliance: Required by most electrical codes and insurance policies
技術仕様
Common models of pressure relief valves are displayed. Please contact us for more information
| モデル | Transformer Capacity | Operating Pressure | Connection Size |
|---|---|---|---|
| PRD-50 | 50-315 kVA | 7-10 psi | DN50 |
| PRD-80 | 315-1000 kVA | 7-10 psi | DN80 |
| PRD-100 | 1-3.15 MVA | 7-10 psi | DN100 |
| PRD-150 | 3.15-10 MVA | 7-10 psi | DN150 |
Standard Features
- 材料: ステンレス鋼構造
- 応答時間: 未満 30 ミリ秒
- リセットタイプ: 自動 (spring-loaded)
- 動作温度: -40°C ～ +90°C
- シーリング: Viton/EPDM gaskets
- 取り付け: Flange or threaded connection
- 保護等級: IP65
- 規格: IEC 60076, IEEE C57.12.00
How PRDs Work
の transformer overpressure protection system uses a spring-loaded diaphragm or disc mechanism calibrated to open at predetermined pressure thresholds (通常 7-10 psi). When internal pressure exceeds this setpoint:
- Excessive pressure overcomes spring force, lifting the relief disc
- Pressurized gas and oil vapor vent rapidly through discharge ports
- Pressure drops below threshold; spring force reseats the disc automatically
- Optional contact switches signal SCADA systems when activation occurs
PRD Operating Principle
Normal Condition
PRD Housing
Relief Disc
Spring Force
Normal Pressure
Overpressure Event
Disc Lifted
Gas Venting
HIGH PRESSURE
Pressure Force
Fault Occurs
Operation Sequence
1. 通常動作:
Spring force keeps relief disc sealed against normal pressure (0-6 psi)
2. 故障検出:
Internal fault creates rapid pressure rise (7-10+ psi)
3. Automatic Relief:
Disc lifts, venting gas/vapor in milliseconds
4. Auto-Reset:
Spring reseats disc when pressure normalizes
設置ガイドライン
Important Safety Notice
PRD installation must be performed by qualified transformer technicians following manufacturer specifications and local electrical codes. Improper installation can compromise transformer safety.
- Mounting Position: Install vertically on transformer cover to ensure proper venting direction away from personnel and equipment
- クリアランス要件: Maintain minimum 3-foot radius clear zone around discharge path
- Torque Specifications: Follow manufacturer torque values for flange bolts to prevent oil leaks
- 電気接続: Wire optional alarm contacts to monitoring systems using shielded cable
- テスト: Never test PRD operation while mounted on energized transformer
アプリケーション
私たちの transformer pressure relief valves 守る:
- 配電変圧器 (50kVA – 3.15MVA)
- 電源トランス (3.15MVA – 100MVA+)
- 変電所の変圧器
- Generator step-up transformers
- Industrial plant transformers
- Mobile/temporary transformers
Why Choose Our PRDs?
🏭 Factory Direct Pricing
Competitive wholesale rates with volume discounts for projects requiring multiple units.
✓ 品質認証済み
IEC 60076 and IEEE C57.12.00 compliant. ISO 9001 manufacturing facility.
🚚 Fast Delivery
Standard models ship within 7-10 営業日. Global freight forwarding available.
🔧 Custom Solutions
Specialized pressure setpoints, flange configurations, and alarm contact options available.
よくある質問
How do I select the correct PRD size for my transformer?
PRD sizing is based on transformer capacity (kVA/MVA定格). Use PRD-50 for 50-315kVA, PRD-80 for 315-1000kVA, PRD-100 for 1-3.15MVA, and PRD-150 for 3.15-10MVA transformers. For transformers above 10MVA or special applications, contact our engineering team for custom sizing calculations.
Does the PRD require periodic replacement or maintenance?
PRDs are maintenance-free during normal operation. しかし, after any activation (pressure relief event), the device should be inspected for seal integrity and proper reset. Replace gaskets if oil leakage is detected. We recommend visual inspection annually during transformer maintenance outages. Typical service life is 15-20 years without activation.
Can PRDs be tested without removing from the transformer?
いいえ. Never attempt to test PRD operation while installed on an energized or oil-filled transformer. Testing requires controlled bench conditions using specialized pressure test equipment. PRD functional verification should only be performed by qualified technicians following manufacturer procedures in a workshop environment.
Request Your PRD Quotation Today
🏭製造施設:
連東U穀物ネットワーキング工業団地
興業西路12号, 福州, 福建省, 中国
光ファイバー温度センサー, インテリジェント監視システム, 中国の分散型光ファイバーメーカー
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