コンタクタ,サーキットブレーカー,ソーラーインバーター,電気メーター,太陽電池
Schneider EGR-20UFCM Digital Earth Leakage Fault Protection Relay (EOCR専用)
シュナイダー EGR-20UFCM は、漏電故障保護用に設計されたデュアル信号組み込みリレーです。. 0.03～20Aの広い測定範囲が特徴です。, 内蔵フィルターとModbus通信. 低電圧配電およびモーター保護に広く適用されています. 電流レンジに一致, 検出タイプと取付モード選択時. 信頼性の高いシステム動作のために、ZCT の極性と接地仕様に厳密に従ってください。.
- モデルコードの定義
| コードセグメント | 意味 | 説明 |
| EGR | 製品シリーズ | Digital earth leakage & fault protection relay, Schneider EOCR series, manufactured by SAMWHA Korea |
| 20 | 電流範囲 | Max detection current 20A, coverage 0.03~20A |
| UF | 検出タイプ | Dual-signal mode: U=Voltage(mV), F=Current(ミリアンペア), compatible with ZCT zero-sequence current transformer |
| CM | 取付タイプ | Console panel mounting, equipped with digital display and protective cover |
Quick Recognition: EGR-20UFCM = 20A range dual-signal embedded earth leakage protection relay, exclusive for EOCR
- コア技術パラメータ
| パラメータ | 仕様 | 述べる |
| 検出タイプ | 現在(ミリアンペア) + 電圧(mV) | Dual input, compatible with ZCT |
| Measuring Current Range | 0.03～20A | Wide coverage for diverse applications |
| Instant Fault Protection | 30ミリアンペア, 30MS | Fast response for personal safety |
| 動作特性 | Inverse / Definite time optional | Flexible for various protection demands |
| 電源 | AC/DC 24V or 100~240V | 幅広い電圧, global power grid adaptation |
| 画面 | LED digital display | Real-time leakage current indication |
| Fault Record | 5 historical faults + RTC clock | Convenient fault analysis and tracing |
| コミュニケーション | Modbus RTU (RS-485) | 遠隔監視とデータ収集 |
| 補助接点 | SPDT (1C/O) | Rated load AC 250V/3A resistive |
| 干渉防止 | Built-in noise filter | Suitable for high harmonic environment like inverter & UPS |
| 保護クラス | IP52 | Dustproof and splash-proof |
| 取り付け | Panel embedded | Compatible with standard 35mm DIN rail |
| 寸法 | W45×H90×D110mm | コンパクトなサイズ, 省スペース |
| 動作温度 | -20~60℃ | Stable operation under harsh industrial conditions |
| 保管温度 | -30~80℃ | Adapt to extreme storage environment |
| 認証 | CE, UL508, EN61010 | Comply with international safety standards |
| 注文番号 | EGR-20UFCM | Official unique part number |
- Full EGR Series Models
| モデル | 検出タイプ | 電流範囲 | 取り付け | 主な特長 |
| EGR-20UFCM | Dual current & 電圧 | 0.03～20A | Panel embedded | Digital display, harmonic resistance |
| EGR-20USAM | Current signal | 0.03～20A | Base mounting | Standard base, easy wiring |
| EGR-10USVM | Voltage signal | 0.03～10A | Base mounting | 電圧入力, fit dedicated ZCT |
| EGR-20RY7M | Current signal | 0.05～20A | Panel embedded | RS-485通信, 広い範囲 |
| EGR-05UFCM | Dual current & 電圧 | 0.03～5A | Panel embedded | Small range, 高精度 |
- Cross-brand Replacement Comparison
| ブランド | モデル | 検出タイプ | 電流範囲 | コミュニケーション | 互換性 |
| シュナイダー (SAMWHA) | EGR-20UFCM | Dual signal | 0.03～20A | Modbus RTU | Perfect match with EOCR and ZCT |
| シーメンス | 3UG4615-1CR20 | 現在 | 0.03～30A | Modbus RTU | General type, adaptation test required |
| ABB | CM-IW20 | 現在 | 0.05～20A | 通信なし | High load capacity, compatible with standard ZCT |
| チント | ND-63 | 現在 | 0.03～30A | Optional RS-485 | Cost-effective alternative |
| 美味しい | DZL-20 | 現在 | 0.05～20A | 通信なし | 国内での交換, slight dimension difference |
交換ノート
- Confirm ZCT compatibility for third-party products to guarantee detection accuracy
- Dual U+F signal is exclusive to EGR-20UFCM, evaluate working condition before replacement
- Select filtered model for high harmonic occasions to avoid false tripping
- トラブルシューティング & メンテナンス
| 故障現象 | 考えられる原因 | Inspection Steps | ソリューション |
| 頻繁な誤トリップ | Harmonic interference, excessive earthing resistance, low setting value | Check interference sources; measure earthing resistance ≤4Ω; verify parameter setting | Activate filter; optimize earthing system; adjust protection threshold |
| No display under normal status | 停電, wrong wiring, display damage | Test power voltage; inspect ZCT wiring; check LED status | Restore power circuit; correct S1/S2 polarity; replace display module |
| No response upon fault | Excessive setting value, defective auxiliary contact, damaged ZCT | Check action parameter; test contact continuity; measure ZCT secondary resistance | Lower protection setting; replace contact parts; renew ZCT transformer |
| 通信障害 | Mismatched parameters, wrong wiring, faulty module | Verify baud rate, アドレスとパリティ; check A/B wire connection; test port voltage | Unify communication parameters; 正しい配線; replace communication module |
Troubleshooting Rules
- Conduct leakage simulation test after installation to verify performance
- Enable filter function to reduce false action in high harmonic environment
- F01=Earth fault, F02=Overcurrent fault for quick positioning
- 応用 & Cases
該当するシナリオ
Low-voltage power distribution: Earth fault protection for circuits below AC 600V
Motor Control Center: Combined leakage and overload protection with EOCR relay
Automatic production line: Inverter-driven motors and UPS power supply equipment
化学薬品 & petroleum industry: Safety protection for flammable and explosive sites, meet ATEX standard
データセンター: Precision equipment protection to ensure power continuity
Building electrical system: Civil leakage protection complying with GB 13955
不適切なシナリオ
High voltage system above 1kV without step-down transformer
Pure DC circuit with declined detection accuracy
Strong electromagnetic field without shielding measures
Operation without matched ZCT zero-sequence transformer
典型的なケース
場合 1: Inverter Motor Protection in Automobile Workshop
10 sets of 75kW variable frequency motors equipped with ZCT-120. EGR-20UFCM adopts dual signal detection and filter design. It realizes 300mA/500ms leakage protection and fault record, improving system reliability by 50%.
場合 2: Operating Room Power Renovation in Hospital
Meet IEC 61557-8 medical leakage protection standard. Combine EGR-20UFCM and ZCT-35 with 30mA instant protection setting, reaching Class B protection level and securing personnel safety.
- 選択 & 設置ガイドライン
Three-step Selection
- Confirm measuring range based on maximum system leakage current (0.03～20A)
- Choose dual UF signal for inverter occasions, single US signal for general use
- Select CM panel mounting for cabinet installation, SA base type for fast wiring
設置上の注意事項
Thread three-phase four-wire cable through ZCT, neutral wire shall not be omitted
Connect ZCT S1 to EGR I+, S2 to I-, reversed connection causes detection failure
Single-point earthing for relay and ZCT, earthing resistance ≤4Ω
Turn on filter function under variable frequency working condition
Use shielded twisted pair for RS-485, avoid reversed A/B wiring
メンテナンススケジュール
| アイテム | サイクル | 標準 |
| Visual inspection | 毎月 | No crack, looseness or overheating |
| Functional test | 四半期ごと | Normal action via leakage simulation |
| Earthing resistance test | Semi-annually | Resistance ≤4Ω |
| 通信テスト | Semi-annually | Stable data transmission without packet loss |
| Parameter verification | Yearly | Settings conform to site safety requirements |
Application Scenarios of EGR-20UFCM
適用分野
- 産業用モーターの保護
Suitable for variable frequency motors and heavy-duty three-phase motors. Cooperate with EOCR relay for comprehensive leakage and fault protection on production lines, ファン, ウォーターポンプとエアコンプレッサー.
- Low-voltage Distribution Circuit
Monitor earth fault of factory power cabinets, MCC control cabinets and branch circuits below AC 600V, prevent fire risks caused by leakage.
- Special Industry Power Consumption
Safety protection for flammable and explosive sites in chemical, oil and mining industry; electric control protection for port cranes and construction machinery.
- Medical Building Power Supply
Precise power distribution for operating rooms and diagnosis rooms, satisfy medical leakage safety standards.
- Data Center Room
Monitor feeder lines of UPS and server cabinets, avoid power outage induced by earth fault.
- 空調設備 & Water Treatment Equipment
Leakage protection for central air conditioning, circulating water pumps and sewage treatment control systems.
- Intelligent Monitoring Power Distribution
Connect to industrial control system via Modbus RTU, remotely check leakage data and trace fault history.
Inapplicable Fields
- Cannot be directly used on circuits over 1kV without step-down transformer
- Poor detection performance on pure DC power loop
- Prone to false tripping without shielding in strong electromagnetic environment
- Unable to work normally without matched ZCT zero-sequence transformer
