المقاولين,قاطع الدائرة,العاكس للطاقة الشمسية,عداد كهرباء,البطاريات الشمسية
Schneider EGR-20UFCM Digital Earth Leakage Fault Protection Relay (حصريًا لـ EOCR)
Schneider EGR-20UFCM عبارة عن مرحل مدمج مزدوج الإشارة مصمم للحماية من أخطاء التسرب الأرضي. ويتميز بنطاق قياس واسع من 0.03 ~ 20A, مرشح مدمج واتصالات Modbus. تطبق على نطاق واسع في توزيع الطاقة ذات الجهد المنخفض وحماية المحرك. تطابق النطاق الحالي, نوع الكشف ووضع التركيب أثناء الاختيار. اتبع بدقة مواصفات قطبية ZCT والتأريض لتشغيل النظام بشكل موثوق.
- تعريف رمز النموذج
| مقطع الكود | معنى | وصف |
| EGR | سلسلة المنتجات | Digital earth leakage & fault protection relay, Schneider EOCR series, manufactured by SAMWHA Korea |
| 20 | النطاق الحالي | Max detection current 20A, coverage 0.03~20A |
| UF | Detection Type | Dual-signal mode: U=Voltage(mV), F=Current(أماه), compatible with ZCT zero-sequence current transformer |
| سم | نوع التركيب | 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
- المعلمات التقنية الأساسية
| المعلمة | مواصفة | Remark |
| Detection Type | حاضِر(أماه) + الجهد االكهربى(mV) | Dual input, compatible with ZCT |
| Measuring Current Range | 0.03~20A | Wide coverage for diverse applications |
| Instant Fault Protection | 30أماه, 30آنسة | Fast response for personal safety |
| خاصية التشغيل | Inverse / Definite time optional | Flexible for various protection demands |
| مزود الطاقة | AC/DC 24V or 100~240V | الجهد واسعة, global power grid adaptation |
| عرض | LED digital display | Real-time leakage current indication |
| Fault Record | 5 historical faults + RTC clock | Convenient fault analysis and tracing |
| تواصل | مودبوس ار تي يو (RS-485) | Remote monitoring and data acquisition |
| الاتصال المساعد | SPDT (1C/O) | Rated load AC 250V/3A resistive |
| Anti-interference | Built-in noise filter | Suitable for high harmonic environment like inverter & يو بي إس |
| فئة الحماية | IP52 | Dustproof and splash-proof |
| تصاعد | Panel embedded | متوافق مع سكة DIN القياسية مقاس 35 مم |
| Dimension | W45×H90×D110mm | حجم صغير, توفير المساحة |
| درجة حرارة التشغيل | -20~60℃ | Stable operation under harsh industrial conditions |
| درجة حرارة التخزين | -30~80℃ | Adapt to extreme storage environment |
| شهادة | م, UL508, EN61010 | Comply with international safety standards |
| رقم الطلب | EGR-20UFCM | Official unique part number |
- Full EGR Series Models
| نموذج | Detection Type | النطاق الحالي | تصاعد | الميزات الرئيسية |
| EGR-20UFCM | Dual current & الجهد االكهربى | 0.03~20A | Panel embedded | العرض الرقمي, harmonic resistance |
| EGR-20USAM | Current signal | 0.03~20A | Base mounting | Standard base, easy wiring |
| EGR-10USVM | Voltage signal | 0.03~10A | Base mounting | Voltage input, fit dedicated ZCT |
| EGR-20RY7M | Current signal | 0.05~20A | Panel embedded | RS-485 communication, مجموعة واسعة |
| EGR-05UFCM | Dual current & الجهد االكهربى | 0.03~5A | Panel embedded | Small range, دقة عالية |
- Cross-brand Replacement Comparison
| ماركة | نموذج | Detection Type | النطاق الحالي | تواصل | التوافق |
| شنايدر (SAMWHA) | EGR-20UFCM | Dual signal | 0.03~20A | مودبوس ار تي يو | Perfect match with EOCR and ZCT |
| سيمنز | 3UG4615-1CR20 | حاضِر | 0.03~30A | مودبوس ار تي يو | General type, adaptation test required |
| ايه بي بي | CM-IW20 | حاضِر | 0.05~20A | لا يوجد اتصال | High load capacity, compatible with standard ZCT |
| شينت | ND-63 | حاضِر | 0.03~30A | Optional RS-485 | Cost-effective alternative |
| لذيذ | DZL-20 | حاضِر | 0.05~20A | لا يوجد اتصال | الاستبدال المحلي, slight dimension difference |
ملاحظات الاستبدال
- 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
- استكشاف الأخطاء وإصلاحها & صيانة
| ظاهرة الخلل | الأسباب المحتملة | Inspection Steps | الحلول |
| التعثر الكاذب المتكرر | 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 | انقطاع التيار الكهربائي, 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 |
| فشل الاتصالات | Mismatched parameters, wrong wiring, faulty module | Verify baud rate, address and parity; check A/B wire connection; test port voltage | Unify communication parameters; الأسلاك الصحيحة; 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
- طلب & Cases
السيناريوهات القابلة للتطبيق
توزيع الطاقة ذات الجهد المنخفض: Earth fault protection for circuits below AC 600V
مركز التحكم في المحركات: Combined leakage and overload protection with EOCR relay
Automatic production line: Inverter-driven motors and UPS power supply equipment
Chemical & petroleum industry: Safety protection for flammable and explosive sites, meet ATEX standard
Data center: Precision equipment protection to ensure power continuity
Building electrical system: Civil leakage protection complying with GB 13955
Unsuitable Scenarios
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
الحالات النموذجية
قضية 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%.
قضية 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.
- اختيار & إرشادات التثبيت
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
احتياطات التثبيت
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
Maintenance Schedule
| غرض | دورة | معيار |
| Visual inspection | شهريا | No crack, looseness or overheating |
| Functional test | ربع سنوية | Normal action via leakage simulation |
| Earthing resistance test | Semi-annually | Resistance ≤4Ω |
| Communication test | Semi-annually | Stable data transmission without packet loss |
| Parameter verification | Yearly | Settings conform to site safety requirements |
Application Scenarios of EGR-20UFCM
الحقول القابلة للتطبيق
- حماية المحركات الصناعية
Suitable for variable frequency motors and heavy-duty three-phase motors. Cooperate with EOCR relay for comprehensive leakage and fault protection on production lines, المشجعين, water pumps and air compressors.
- 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.
- التدفئة والتهوية وتكييف الهواء & 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
