Schneider LC1D256BL Contactor

型式コードの説明

2. 主な技術仕様

3. 全モデルリスト (LC1D Series, 25A Range)

4. クロスブランド & Old/New Model Replacement List

4.1 In-brand Replacement (シュナイダー)

4.2 ブランド間の交換

5. アプリケーション環境 & 業界の事例

5.1 推奨アプリケーション

産業オートメーション: Control of three-phase asynchronous motors (ファン, ウォーターポンプ, コンプレッサー, コンベア)

HVAC Systems: Air conditioning compressors and ventilation systems

建物の電気: Building automation, lighting systems and fire-fighting equipment

エネルギー産業: Power generation equipment, power distribution systems and renewable energy facilities

水処理: Water pump control and wastewater treatment equipment

海洋 & Railway: Transportation industry requiring special certifications (LC1D series advantages)

5.2 推奨されないアプリケーション

High-frequency switching: 以上 1200 時間あたりの操作数 (Select LC1Q / LC1R series instead)

High altitude: Elevation over 2000m (Derate load or use special models)

Corrosive environments: Direct exposure to acid, alkali and salt mist (Additional protection required)

Explosion-proof areas: Special explosion-proof certified models are mandatory

5.3 代表的な応用例

1. Automobile Manufacturing Plant

Used for motor control of stamping production lines. After replacement, breaking time is reduced by 30%, failure rate drops by 50%, maintenance time is shortened from 2 hours to 30 分, and annual maintenance cost is cut by about 200,000 人民元.

2. 食べ物 & 飲料業界

Applied to three-phase motors of filling lines. Thanks to 2.4W low power consumption, each contactor saves approximately 18 kWh per year under 24-hour continuous operation. A factory with 100 units saves 1,800 kWh annually.

3. データセンター

Controls air conditioning compressors and ventilation fans. The 24VDC low-power coil ensures stable operation under UPS power supply, reduces battery load and extends backup duration.

6. 選定ガイドライン & Quick Reference Rules

Quick Selection Tips

This is a 3-pole 25A contactor with 24VDC low-power coil and ring terminals. Equipped with 1NO+1NC auxiliary contacts, it features energy efficiency, high reliability and long service life, ideal for motors, ウォーターポンプとコンプレッサー.

Quick Reference Rules

1. 現在のマッチング: 25A under AC-3 for 11kW three-phase motors; 40A capacity for resistive loads under AC-1.
2. Coil Identification: Suffix BL = 24VDC low power; B7 = 24VAC low power; BD = 24VDC standard power.
3. 補助接点: Standard 1NO+1NC. Models with suffix 01 または 10 for alternative contact configurations.
4. インストール: 標準 35mm DIN レール取り付け; ring terminals ensure reliable connection.
5. Energy Saving: Low-power coil (≤2.4W) saves 70% energy compared with standard coil (約. 8W), perfect for long-term operation.
6. 一般的な障害 & トラブルシューティング

8. Key Ordering Information

スタンダードモデル: LC1D256BL

代替モデル: LC1D25BD (standard power version), LC1D256B7 (24VAC low-power version)

互換性のあるアクセサリ:

補助接点ブロック: LADNシリーズ (例えば. LADN20C: 2いいえ; LADN02C: 2ノースカロライナ州)

Overload relays: LRDシリーズ (例えば. LRD08C: 6-10あ, matches 25A contactor)

Mounting base: Optional separate base

Application Scenarios for LC1D256BL

Core features: 3-pole 25A, 24VDC low-power coil, 長寿命, standard DIN rail mounting, 1NO+1NC auxiliary contacts, strong anti-interference performance.

1. 推奨されるアプリケーション シナリオ (主な用途)

Featured with 24VDC low-power DC coil, this model perfectly matches standard industrial DC control circuits. Its 25A rating is suitable for three-phase motors up to 11kW and resistive loads up to 40A, serving as a mainstream component for automatic control cabinets.

1.1 産業用オートメーション機器 (コアアプリケーション)

適用機器

PLC/DCS control cabinets, 小型工作機械, manipulator auxiliary mechanisms, inverter-driven fans, small drive motors, test and inspection equipment.

利点

24VDC is the mainstream control voltage for industrial control systems, no extra power converter required.

DC coil provides strong EMC performance, avoiding misoperation caused by inverters and servos.

低電力 (≤2.4W) generates little heat during continuous power-on, に適した 24/7 standby equipment.

1.2 空調設備 & Air Ventilation Systems

適用機器

屋内 & outdoor unit fans of central air conditioners, condensate pumps, 冷却塔ファン, fresh air handling units, damper drive motors, machine room exhaust fans.

利点

HVAC rooms widely adopt 24VDC automatic control circuits for high compatibility.

Low power design reduces energy consumption and cabinet temperature for year-round continuous operation.

使用温度範囲: -25℃～+70℃, adapts to drastic temperature changes in machine rooms.

1.3 建物の電気 & Fire Emergency Systems

適用機器

Domestic water pumps, basement exhaust fans, fire smoke exhaust fans, fire roller shutter motors, centralized emergency lighting circuits (抵抗負荷).

利点

Standard 24VDC for fire emergency circuits, directly powered by UPS/emergency batteries for normal operation during power failure.

Built-in 1NO+1NC auxiliary contacts transmit operation/fault signals to fire alarm hosts and building monitoring systems.

40A load capacity under AC-1 for multi-circuit lighting control.

1.4 水処理産業 (Sewage / Purified Water / Circulating Water)

適用機器

Circulating water pumps, dosing metering pumps, aeration fans, small agitator motors, ventilation equipment for water treatment workshops.

利点

Almost all automatic control systems for water treatment use 24VDC.

IP20 protection rating adapts to slightly humid indoor machine rooms.

Satisfactory electrical endurance for frequent start-stop operation with low failure rate.

1.5 新エネルギー, PV & Energy Storage Cabinets

適用機器

Cooling fans for PV boxes, temperature control pumps for battery compartments, ventilation motors of energy storage cabinets, small auxiliary inverter loads.

利点

PV and energy storage systems are DC-powered inherently; no inverter needed for 24VDC coil.

Ultra-low coil power avoids extra consumption of backup battery power and extends backup time.

No AC humming for DC coil, ideal for quiet energy storage rooms.

1.6 ロジスティクス, 倉庫保管 & Conveyor Lines

適用機器

ベルトコンベア, roller sorting lines, small elevators, warehouse ventilation fans.

利点

Mechanical and electrical endurance meets frequent regular start-stop for long-running production lines.

Auxiliary contacts realize interlock, chain control and sequence start to ensure safety logic of production lines.

1.7 食べ物, 包装 & Light Industrial Equipment

適用機器

Conveyors of packaging machines, auxiliary motors of filling lines, dehumidifiers and ventilation fans for workshops.

利点

Suitable for clean indoor workshops without heavy corrosion; standard rail mounting facilitates standardized cabinet wiring.

Compact structure saves cabinet space, a standard OEM component for complete machines.

2. 推奨されません / Prohibited Scenarios (リスク & 代替案)

2.1 High-frequency Start-Stop (以上 1200 cycles per hour)

リスク: Excessive switching frequency causes rapid contact ablation, welding and shortened service life.

代替: Schneider LC1R / LC1R series high-frequency contactors.

2.2 Altitude above 2000m

リスク: Thin air degrades arc extinction capability, leading to arcing and reduced insulation performance.

おすすめ: Use special high-altitude contactors or derate the load by over 30%.

2.3 Severe Corrosion, Salt Spray & Heavy Dust (Chemical Plants, Coastal Open Areas, 鉱山)

リスク: IP20 rating cannot protect coil, terminals and contacts from acid, alkali, salt mist and dust erosion.

要件: Bare installation is forbidden. Use sealed enclosures of IP54 or higher; select anti-corrosion models for chemical environments.

2.4 Direct Outdoor Installation without Protection

リスク: Rain, sunlight and condensation lead to coil short circuit and contact oxidation.

Mandatory Requirement: Install inside distribution cabinets or control enclosures with IP54 or higher protection.

2.5 High-power Pure DC Main Circuit Loads

リスク: Designed mainly for AC loads with poor DC breaking capacity; high DC loads easily cause contact welding.

代替: Schneider LP1D dedicated DC contactors.

2.6 AC220V / AC380V Control Circuits

リスク: 24VDC coil will burn out instantly if connected to AC power.

Alternative AC coil models:

24VAC: LC1D256B7

220VAC: LC1D25M7

380VAC: LC1D25Q7

2.7 Control Three-phase 380V Motors over 11kW (AC-3)

リスク: Rated 25A under AC-3 corresponds to 11kW motor; overload results in overheating and burnt contacts.

代替: Upgrade to higher current models such as LC1D32 series.

3. Notes for Marginal Operating Conditions (Usable with Protection Measures)
4. Basements & Humid Machine Rooms

The product is applicable. Install dehumidifiers inside control cabinets to prevent condensation inside the contactor.

2. Ambient Temperature near Limits (-25℃ / +70℃)

Derate the load by 10% and avoid long-term full-load operation.

3. Coil Wiring Length over 10m

Voltage drop occurs on 24VDC lines. Ensure terminal voltage of the contactor coil is no lower than 19.2V (minimum pull-in voltage).

4. Control Inductive Loads such as Motors

Equip with surge suppressors (Schneider LADRC series) to absorb back EMF and protect the coil.

4. Scenario Summary

✅ Preferred Applications: Indoor control cabinets, 24VDC control systems, three-phase motors up to 11kW, 24/7 continuous-operation equipment (オートメーション, 空調設備, Fire Protection, 水処理, Energy Storage).

❌ Avoid: High-frequency switching, high altitude, unprotected outdoor areas, heavily corrosive environments, high-power DC main circuits, AC control power supply.