Schneider LC1D18M7 AC Contactor

مسلسل: تيسيس د (TeSys Deca), import model (without suffix-C)

فك تشفير النموذج

LC1D: سلسلة تيسيس د 3-موصل التيار المتردد القطب

18: Rated operational current 18A under AC-3 utilization category

م: Coil voltage AC220V

7: Coil frequency 50/60Hz universal

LC1D18MC: Domestic-manufactured version; LC1D18M7: Overseas/imported version. Fully pin-to-pin compatible and interchangeable.

المواصفات الكهربائية الأساسية

مهمة المحطة

الدائرة الرئيسية: L1(1-1), L2(3-2), L3(5-3); T1(2-1), T2(4-2), T3(6-3)

لفائف: أ1, A2 → AC220V power supply

مساعد: 13-14 (NO Normally Open), 21-22 (NC Normally Closed)

اختيار & استبدال

1. Direct compatible domestic equivalent: LC1D18M7C (Local production, identical footprint, current and coil rating, widely used in projects)
2. Coil voltage variants:

LC1D18B7: تيار متردد 24 فولت

LC1D18F7: تيار متردد 110 فولت

LC1D18Q7: تيار متردد 380 فولت

3. Domestic compatible alternatives: CJX2-1810 (1لا), CJX2-1801 (1نورث كارولاينا), CJX2-1811 (1لا + 1NC) matches the auxiliary-contact configuration of this model.

التطبيقات النموذجية

Direct-on-line switching of 3-phase motors, المشجعين, مضخات المياه, الضواغط, أنظمة التدفئة والتهوية وتكييف الهواء, low-voltage switchgear, star-delta starters, سيور ناقلة; Standard AC-3 motor loads; Up to 32A for AC-1 resistive loads.

استكشاف الأخطاء وإصلاحها & ملاحظات الصيانة

1. Judge coil integrity by measuring resistance across A1-A2. Operating coil voltage shall remain within 0.8-1.1 × 220 V; Undervoltage causes chattering.
2. Auxiliary contacts rated max.5A, for control-signal circuits only. Do not switch power loads.
3. Tighten terminals to 1.7 N·m. Insufficient torque leads to overheating and burnt terminals.

Application Fields of شنايدر LC1D18M7 AC Contactor

LC1D18M7 is a TeSys-D 3-pole 18A contactor, rated for 7.5 kW@400 V under AC-3 with AC220 V 50/60 Hz coil. It is widely deployed in industry, building services, HVAC and OEM equipment.

1. الآلات الصناعية & معدات

Direct start-stop control for 3-phase asynchronous motors: سيور ناقلة, خلاطات, المطاحن, مضخات صغيرة, ضواغط الهواء, ventilation fans.

Machine-tool equipment: Lathes, milling machines, آلات التعبئة والتغليف, printing equipment for main-circuit switching.

Star-delta starting circuits, motor-reversing circuits. Can be paired with thermal overload relays for motor overload protection.

Automation control cabinets: PLC outputs drive contactor coils to switch high-power loads.

2. التدفئة والتهوية وتكييف الهواء (التدفئة, Ventilation and Air-Conditioning)

Central air-conditioning units, cabinet fans, cooling-tower fans, circulating water pumps.

Fresh-air handling and exhaust systems, building electromechanical switch rooms.

AC220 V coil variants such as LC1D18M7 are extensively used in HVAC installations.

3. خدمات البناء & توزيع الطاقة

Factory power panels, compact low-voltage distribution cabinets.

Water supply & الصرف: Sewage pumps, booster pumps, drain-pump control.

Centralised lighting control (Max.32 A AC-1 resistive), switching for high-power heating elements and resistive loads.

4. رفع & التخزين اللوجستي

Small hoisting mechanisms, أنظمة الناقل, sorting equipment.

Not suitable for heavy jog-lifting duty cycles (Select higher-endurance contactors for frequent jogging).

5. OEM Complete-Set Equipment

Used as standard component by machinery manufacturers: food-processing machines, auxiliary injection-moulding equipment, environmental-protection and water-treatment systems.

Application Limitations (سيناريوهات غير مناسبة)

1. Not intended for DC main-circuit switching (DC-type contactor required).
2. Avoid extremely frequent jogging / عملية دورة عالية, which drastically shortens electrical service life.
3. 1NO+1NC auxiliary contacts are limited to control-level signals (max.5 A). Never carry main power loads.

Common Matching Accessories

حماية الزائد: LRD series thermal overload relays

Auxiliary-contact expansion: كتل الاتصال المساعدة LADN

Coil surge suppression: LADRC surge suppressors to reduce electromagnetic interference