Schneider LC1D18M7 AC Contactor

Ряд: ТеСис Д (TeSys Deca), import model (without suffix-C)

Model Decoding

LC1D: Серия TeSys D 3-контактор переменного тока полюса

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

М: Coil voltage AC220V

7: Coil frequency 50/60Hz universal

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

Основные электрические характеристики

Элемент	Параметр
Основная схема	3полюс, 3НЕТ; АС‑3:18А; Max operating voltage 690V
Номинальная мощность двигателя (АС‑3)	220В:4кВт; 380‑400V:7.5кВт; 440В:9кВт
Вспомогательные контакты	1НЕТ + 1Северная Каролина (зеркальные контакты)
Катушка	220 В переменного тока, 50/60 Гц; Pick‑up 70VA, Holding 7‑7.5VA
Механическая выносливость	15 million operations; Electrical endurance AC‑3:1.65 million operations
Монтаж	35 mm DIN‑rail or screw‑mounting
Габаритные размеры	W45 × H77 × D86 mm; Net weight 0.33 kg
Терминальный крутящий момент	Основной & схема управления: 1.7 Н·м
Рабочая температура	‑40～+60 ℃; Derating required for 60‑70 ℃
Класс защиты	IP20

Terminal Assignment

Главная цепь: Л1(1-1), Л2(3-2), Л3(5-3); Т1(2-1), Т2(4-2), Т3(6-3)

Катушка: А1, A2 → AC220V power supply

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

Выбор & Замена

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

LC1D18B7: 24 В переменного тока

LC1D18F7: 110 В переменного тока

LC1D18Q7: AC380В

Domestic compatible alternatives: CJX2-1810 (1НЕТ), CJX2-1801 (1Северная Каролина), CJX2-1811 (1НО+1НЗ) matches the auxiliary-contact configuration of this model.

Типичные применения

Direct-on-line switching of 3-phase motors, фанаты, водяные насосы, компрессоры, системы отопления, вентиляции и кондиционирования, low-voltage switchgear, star-delta starters, конвейерные ленты; Standard AC-3 motor loads; Up to 32A for AC-1 resistive loads.

Поиск неисправностей & Примечания по техническому обслуживанию

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

Application Fields of Шнайдер 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.

Промышленное оборудование & Оборудование

Direct start-stop control for 3-phase asynchronous motors: конвейерные ленты, миксеры, шлифовальные машины, маленькие насосы, воздушные компрессоры, ventilation fans.

Machine-tool equipment: токарные станки, фрезерные станки, упаковочное оборудование, 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.

ОВК (Обогрев, 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.

Строительные услуги & Распределение мощности

Factory power panels, compact low-voltage distribution cabinets.

Water supply & drainage: Канализационные насосы, booster pumps, drain-pump control.

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

Лифтинг & Логистика Складирование

Small hoisting mechanisms, конвейерные системы, сортировочное оборудование.

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

OEM Complete-Set Equipment

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

Ограничения приложения (Неподходящие сценарии)

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

Common Matching Accessories

Защита от перегрузки: LRD series thermal overload relays

Auxiliary-contact expansion: LADN auxiliary contact blocks

Coil surge suppression: LADRC surge suppressors to reduce electromagnetic interference