접촉기,회로 차단기,태양광 인버터,전기 계량기,태양 전지
Schneider EGR-20UFCM Digital Earth Leakage Fault Protection Relay (EOCR 전용)
Schneider EGR-20UFCM은 누전 사고 보호를 위해 설계된 이중 신호 내장형 계전기입니다.. 0.03~20A의 넓은 측정 범위가 특징입니다., 내장 필터 및 Modbus 통신. 저전압 배전 및 모터 보호에 널리 적용. 현재 범위 일치, 선택 시 감지 유형 및 장착 모드. 안정적인 시스템 작동을 위해 ZCT 극성 및 접지 사양을 엄격히 따르십시오..
- 모델 코드 정의
| 코드 세그먼트 | 의미 | 설명 |
| EGR | 제품 시리즈 | Digital earth leakage & fault protection relay, Schneider EOCR series, manufactured by SAMWHA Korea |
| 20 | 현재 범위 | Max detection current 20A, coverage 0.03~20A |
| UF | Detection Type | Dual-signal mode: U=Voltage(mV), F=Current(엄마), compatible with ZCT zero-sequence current transformer |
| CM | 장착 유형 | 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
- 핵심 기술 매개변수
| 매개변수 | 사양 | 주목 |
| Detection Type | 현재의(엄마) + 전압(mV) | 이중 입력, compatible with ZCT |
| Measuring Current Range | 0.03~20A | Wide coverage for diverse applications |
| Instant Fault Protection | 30엄마, 30ms | Fast response for personal safety |
| Operating Characteristic | Inverse / Definite time optional | Flexible for various protection demands |
| 전원공급장치 | AC/DC 24V or 100~240V | 넓은 전압, global power grid adaptation |
| 표시하다 | LED digital display | Real-time leakage current indication |
| Fault Record | 5 historical faults + RTC clock | Convenient fault analysis and tracing |
| 의사소통 | 모드버스 RTU (RS-485) | Remote monitoring and data acquisition |
| 보조 연락처 | SPDT (1C/O) | Rated load AC 250V/3A resistive |
| Anti-interference | Built-in noise filter | Suitable for high harmonic environment like inverter & UPS |
| 보호 등급 | IP52 | Dustproof and splash-proof |
| 설치 | Panel embedded | 표준 35mm DIN 레일과 호환 가능 |
| 차원 | W45×H90×D110mm | 컴팩트한 사이즈, 공간 절약 |
| 작동 온도 | -20~60℃ | Stable operation under harsh industrial conditions |
| 보관 온도 | -30~80℃ | Adapt to extreme storage environment |
| 인증 | CE, UL508, EN61010 | Comply with international safety standards |
| 주문 번호 | EGR-20UFCM | Official unique part number |
- Full EGR Series Models
| 모델 | Detection Type | 현재 범위 | 설치 | 주요 특징 |
| EGR-20UFCM | Dual current & 전압 | 0.03~20A | Panel embedded | 디지털 디스플레이, harmonic resistance |
| EGR-20USAM | Current signal | 0.03~20A | 베이스 장착 | Standard base, 쉬운 배선 |
| EGR-10USVM | Voltage signal | 0.03~10A | 베이스 장착 | 전압 입력, fit dedicated ZCT |
| EGR-20RY7M | Current signal | 0.05~20A | Panel embedded | RS-485 communication, 넓은 범위 |
| EGR-05UFCM | Dual current & 전압 | 0.03~5A | Panel embedded | Small range, 높은 정밀도 |
- Cross-brand Replacement Comparison
| 상표 | 모델 | Detection Type | 현재 범위 | 의사소통 | 호환성 |
| 슈나이더 (SAMWHA) | EGR-20UFCM | Dual signal | 0.03~20A | 모드버스 RTU | Perfect match with EOCR and ZCT |
| 지멘스 | 3UG4615-1CR20 | 현재의 | 0.03~30A | 모드버스 RTU | General type, adaptation test required |
| 씨줄 | CM-IW20 | 현재의 | 0.05~20A | No communication | High load capacity, compatible with standard ZCT |
| 친트 | ND-63 | 현재의 | 0.03~30A | Optional RS-485 | Cost-effective alternative |
| 맛있는 | DZL-20 | 현재의 | 0.05~20A | No communication | 국내 대체, 약간의 치수 차이 |
교체 노트
- 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
- 문제 해결 & 유지
| 결함 현상 | 가능한 원인 | Inspection Steps | 솔루션 |
| 빈번한 잘못된 트립 | 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 | 정전, 잘못된 배선, 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 |
| Communication failure | Mismatched parameters, 잘못된 배선, faulty module | Verify baud rate, address and parity; check A/B wire connection; test port voltage | Unify communication parameters; 올바른 배선; 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
- 애플리케이션 & Cases
적용 가능한 시나리오
저전압 배전: Earth fault protection for circuits below AC 600V
모터 제어 센터: Combined leakage and overload protection with EOCR relay
Automatic production line: Inverter-driven motors and UPS power supply equipment
화학적인 & petroleum industry: Safety protection for flammable and explosive sites, meet ATEX standard
데이터 센터: 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
일반적인 경우
사례 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%.
사례 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.
- 선택 & Installation Guidelines
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
설치시 주의사항
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
유지보수 일정
| 목 | 주기 | 기준 |
| 육안검사 | 월간 간행물 | No crack, looseness or overheating |
| Functional test | 계간지 | Normal action via leakage simulation |
| Earthing resistance test | 반년마다 | Resistance ≤4Ω |
| Communication test | 반년마다 | Stable data transmission without packet loss |
| Parameter verification | 매년 | Settings conform to site safety requirements |
Application Scenarios of EGR-20UFCM
적용분야
- 산업용 모터 보호
Suitable for variable frequency motors and heavy-duty three-phase motors. Cooperate with EOCR relay for comprehensive leakage and fault protection on production lines, 팬, 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.
- 공조 & 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
