Schneider LC1G475KUEC 3극 접촉기

3‑pole contactor from domestic TeSys Giga series, AC‑3 475A/440V, coil 100–250V AC/DC wide voltage, standard 1NO+1NC auxiliary contacts. Suitable for high‑power motor control and power switching. Supports contact wear diagnosis and can be used with LR9G series thermal relays.

1 기본 매개변수 & Naming Explanation

2 Key Performance Data

3 응용 & 특징

응용

직접 시작, forward/reverse control, star‑delta starting of high‑power three‑phase asynchronous motors

Industrial power switching and distribution system control

Inductive load control with power factor ≥ 0.95

Heavy‑duty industries: 건물 전기, 야금, 화학적인, 채광, 등.

주요 특징

1. 고성능: Up to 620A at AC‑3, 1050A at AC‑1 for heavy‑duty applications
2. Smart diagnosis: Built‑in contact wear detection for predictive maintenance
3. Wide‑voltage coil: 100–250V AC/DC reduces spare parts inventory
4. 모듈형 디자인: Supports various accessories (aux contacts, mechanical interlock, 서지 억제기, 등.)
5. 안전한 & 믿을 수 있는: Excellent arc extinguishing, 혹독한 산업 환경에 적합

4 설치 & Wiring Information

장착 치수 (China version LC1G475C)

너비: 대략. 140mm

키: 대략. 270mm

깊이: 대략. 150mm

설치: Standard 35mm DIN rail or screw mounting

무게: 대략. 10.6kg

Wiring requirements

1. Main circuit terminals: Suitable for copper/aluminum cables; crimping lugs recommended
2. Control circuit terminals: Suitable for 1.5–2.5mm² control cables
3. 정리: ≥50mm left & right, ≥100mm top & bottom for proper heat dissipation

5 액세서리 호환성 & Matching Products

6 브랜드 간 대안

7 설치 & Commissioning Tips

1. Pre‑installation inspection

Verify model, rated parameters and control supply match

Check for physical damage, 접촉 산화

Ensure flat mounting surface and secure rail

2. Installation steps

DIN 레일: Align to 35mm rail, press firmly until locked

나사 장착: Use M6 screws, torque 8–10N·m

배선: Main circuit first, then control circuit; observe terminal torque

3. 시운전 & 테스트

No‑load test: Apply control power; check smooth operation, 비정상적인 소음

부하 테스트: Run under load; monitor current, coil temperature

Aux contact test: Verify NO/NC switching and contact resistance

4. Maintenance recommendations

Regularly inspect contact wear; 마모되면 교체 >1mm

Clean arc chamber; remove dust and metal particles

Check coil insulation resistance ≥1MΩ

Retighten all terminals to avoid overheating

8 선택 참고 사항

1. Select contactor according to load type (AC‑3/AC‑4/AC‑1)
2. For motor control: Contactor rated current ≥ 1.1 × 모터 정격 전류
3. For frequent starting/reversing (AC‑4): Derate by 20–30%
4. For unstable control supply: Prefer wide‑voltage coil models
5. When used with thermal relay: Ensure matching ratings

Installation Manual – Schneider Domestic TeSys LC1G475KUEC 3‑Pole Contactor

Doc No.: DOCA0189ZH‑04 (based on official Schneider TeSys Giga installation guide)

Applicable model: LC1G475KUEC (domestic TeSys Giga 3‑pole contactor)

버전: 1월 2023

⚠️ Safety Warnings (꼭 읽어야 할)

1 제품개요

1.1 Product Identification

모델: LC1G475KUEC

시리즈: Domestic TeSys Giga (LC1G)

폴란드: 3피 (3아니요, 3‑pole normally open)

정격전류: AC‑3 475A (440다섯)

코일 전압: 100–250V AC/DC (넓은 전압)

보조 접점: 1NO+1NC standard

표준: IEC 60947-4-1, GB/T 14048.4

버전: 중국 버전 (suffix C; no UL certification)

1.2 치수 (단위: mm)

2 Pre‑Installation Preparation

2.1 도구

십자 드라이버 (PH3)

Hex key (per fixing screw size)

토크 렌치 (5–20N·m range)

Wire stripper (1.5–2.5mm² control & large main cables)

Crimping tool (for cable lugs)

Multimeter (coil resistance & insulation check)

Spirit level

2.2 재료

Mounting plate (금속, thickness ≥3mm, flat, burr‑free)

M6 mounting screws (분. 4 PC)

Cable lugs (for main circuit cables)

Control cable (1.5–2.5mm² copper)

Main cable (≥150mm² copper recommended)

Insulation tape / heat‑shrink tubing

Marker pen

2.3 환경 요구 사항

2.4 Product Inspection

1. Check packaging and transport damage
2. Verify model label (LC1G475KUEC)
3. Inspect contacts for oxidation, pitting, foreign matter
4. Manually actuate armature; check smooth operation
5. 멀티미터로 코일 저항 측정
6. Test auxiliary contact switching

3 설치 절차 (Surface Mounting)

메모: Domestic LC1G475KUEC supports surface mounting only; not for DIN rail.

3.1 Mounting Plate Drilling (선택 과목)

1. Mark holes at 100×120mm
2. Drill diameter: φ6.5mm (for M6)
3. Deburr after drilling

3.2 Hanging & Fixing

1. Hang: Locate bottom hanging holes onto mounting plate pins/screws
2. Preliminary fix: Hand‑tighten top M6 screws
3. Final fix: Torque all 4 screws to 3±0.3N·m (top‑down, diagonal)
4. Level check: Ensure inclination ≤30°

3.3 액세서리 설치 (Aux Contacts / 기계적 인터록)

1. 보조 접점

Disconnect control power

Align and push into top slot until click

Verify secure locking

2. Mechanical interlock

Keep ≥50mm between two contactors

Mount interlock on sides

Adjust to prevent simultaneous closing

Test manually

4 Wiring Procedure

4.1 Pre‑Wiring Notes

1. Confirm all power disconnected
2. Main cables must use proper crimp lugs
3. Control cable strip length: ~8–10mm
4. 순서: Main circuit first, then control

4.2 주회로 배선 (3피, L1/L2/L3 → T1/T2/T3)

1. Open main terminal cover
2. Insert lugged cables
3. 토크:

Copper: 12±1N·m

Aluminum: 14±1N·m (with anti‑oxidant)

4. Securely tighten; check by gentle pull
5. Close terminal cover

4.3 제어 회로 배선 (Coil A1/A2, Aux NO/NC)

1. Open control terminal cover
2. 코일:

A1: Control supply +/Line

A2: Control supply –/Neutral

3. Aux contacts:

아니요: 13-14 (보유, indication)

NC: 21-22 (interlock, 잘못)

4. Control terminal torque: 2±0.2N·m
5. Close cover

4.4 배선도

5 Mounting with Thermal Relay (LR9G475)

5.1 Direct Installation

1. Confirm matching: LC1G475KUEC + LR9G475
2. Align thermal relay to top slot
3. Push down until click
4. Check secure mounting
5. Connect pre‑installed busbars
6. Torque busbar screws: 8±0.8N·m

5.2 배선 참고 사항

1. 기본: Power → Contactor → Thermal relay → Motor
2. 제어: Thermal relay NC (95–96) 접촉기 코일과 직렬로 연결
3. Set thermal relay current to motor rated current

6 시운전 & 테스트

6.1 No‑Load Test

1. Apply control power (main open)
2. Check smooth closing, no abnormal noise
3. Verify aux contact switching
4. Check rapid opening
5. Repeat 3–5 times

6.2 부하 테스트

1. Apply main power
2. Start motor; check current within rating
3. Monitor coil temperature ≤60°C after 1h
4. Check terminal temperature ≤70°C (infrared)
5. Simulate overload; verify relay trip

6.3 Contact Wear Diagnosis (LC1G Feature)

1. Monitor via auxiliary contacts
2. Warning when wear >1mm
3. Replace contactor promptly

7 유지 & Service

7.1 Routine Inspection (모든 6 개월)

1. De‑energize; inspect for dirt, 손상
2. Clean arc chamber (compressed air ≤0.3MPa)
3. Check contact resistance ≤500μΩ
4. Check coil insulation ≥1MΩ (500V 메가)
5. Retighten terminals
6. Test operation

7.2 Replacement Schedule

7.3 문제 해결

8 안전 & 환경

8.1 Safe Disposal

1. Disconnect all power before scrapping
2. Remove all wiring
3. Separate metal & plastic for recycling
4. Contacts contain silver alloy; recycle as precious metal

8.2 환경 준수

RoHS 준수; free of Pb, Hg, 등.

Plastic housing recyclable

Dispose per local regulations

9 Appendix – Technical Data