シュナイダー LC1G475KUEC 3 極コンタクタ

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

1 基本パラメータ & Naming Explanation

2 Key Performance Data

3 アプリケーション & 特徴

アプリケーション

Direct starting, 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: 建物の電気, 冶金, 化学薬品, 採掘, 等.

主な特長

1. 高性能: 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. モジュラー設計: Supports various accessories (aux contacts, mechanical interlock, surge suppressor, 等)
5. 安全 & 信頼性のある: Excellent arc extinguishing, 過酷な産業環境に適しています

4 取り付け & Wiring Information

取付寸法 (China version LC1G475C)

幅: 約. 140mm

身長: 約. 270mm

深さ: 約. 150mm

取り付け: Standard 35mm DIN rail or screw mounting

重さ: 約. 10.6kg

配線要件

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. クリアランス: ≥50mm left & right, ≥100mm top & bottom for proper heat dissipation

5 アクセサリの互換性 & Matching Products

6 Cross‑Brand Alternatives

7 インストール & Commissioning Tips

1. Pre‑installation inspection

Verify model, rated parameters and control supply match

Check for physical damage, 接触酸化

Ensure flat mounting surface and secure rail

2. Installation steps

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

ネジ取付: Use M6 screws, torque 8–10N·m

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

3. 試運転 & testing

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

負荷試験: Run under load; monitor current, coil temperature

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

4. Maintenance recommendations

Regularly inspect contact wear; replace if wear >1mm

Clean arc chamber; remove dust and metal particles

Check coil insulation resistance ≥1MΩ

Retighten all terminals to avoid overheating

8 選定メモ

1. Select contactor according to load type (AC‑3/AC‑4/AC‑1)
2. モーター制御用: Contactor rated current ≥ 1.1 × モーター定格電流
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)

バージョン: January 2023

⚠️ Safety Warnings (必読)

1 製品概要

1.1 Product Identification

モデル: LC1G475KUEC

シリーズ: Domestic TeSys Giga (LC1G)

極: 3P (3いいえ, 3‑pole normally open)

定格電流: AC‑3 475A (440V)

コイル電圧: 100–250V AC/DC (幅広い電圧)

補助接点: 1NO+1NC standard

規格: IEC 60947‑4‑1, ギガバイト/トン 14048.4

バージョン: 中国版 (suffix C; no UL certification)

1.2 寸法 (ユニット: mm)

2 Pre‑Installation Preparation

2.1 ツール

プラスドライバー (PH3)

Hex key (per fixing screw size)

トルクレンチ (5–20N·m range)

ワイヤーストリッパー (1.5–2.5mm² control & large main cables)

Crimping tool (for cable lugs)

マルチメーター (coil resistance & insulation check)

Spirit level

2.2 材料

Mounting plate (金属, thickness ≥3mm, フラット, burr‑free)

M6 mounting screws (分. 4 pcs)

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 環境要件

2.4 製品検査

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. マルチメーターでコイル抵抗を測定
6. Test auxiliary contact switching

3 Installation Procedure (Surface Mounting)

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

3.1 Mounting Plate Drilling (オプション)

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

3.2 Hanging & 固定する

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 付属品の取り付け (Aux Contacts / 機械的インターロック)

1. 補助接点

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. 順序: Main circuit first, then control

4.2 主回路配線 (3P, L1/L2/L3 → T1/T2/T3)

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

銅: 12±1N·m

Aluminum: 14±1N·m (with anti‑oxidant)

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

4.3 制御回路の配線 (Coil A1/A2, Aux NO/NC)

1. Open control terminal cover
2. コイル:

A1: Control supply +/Line

A2: Control supply –/Neutral

3. Aux contacts:

いいえ: 13–14 (保持している, indication)

ノースカロライナ州: 21–22 (interlock, 故障)

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

4.4 Wiring Diagram

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 Wiring Notes

1. 主要: Power → Contactor → Thermal relay → Motor
2. コントロール: Thermal relay NC (95–96) 接触器コイルと直列
3. Set thermal relay current to motor rated current

6 試運転 & テスト

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 負荷テスト

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 メンテナンス & Service

7.1 Routine Inspection (毎 6 月)

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

7.2 Replacement Schedule

7.3 トラブルシューティング

8 安全性 & 環境

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 Environmental Compliance

RoHS対応; free of Pb, Hg, 等.

Plastic housing recyclable

Dispose per local regulations

9 Appendix – Technical Data