Schneider LC1D18M7 AC Contactor

Serie: TeSys D (TeSys Deca), import model (without suffix-C)

Modelldekodierung

LC1D: TeSys D-Serie 3-Pol-AC-Schütz

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

M: Coil voltage AC220V

7: Coil frequency 50/60Hz universal

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

Grundlegende elektrische Spezifikationen

Anschlussbelegung

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

Spule: A1, A2 → AC220V power supply

Hilfs: 13-14 (NEIN Normalerweise geöffnet), 21-22 (NC, normalerweise geschlossen)

Auswahl & Ersatz

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

LC1D18B7: AC24V

LC1D18F7: AC110V

LC1D18Q7: AC380V

3. Inländische kompatible Alternativen: CJX2-1810 (1NEIN), CJX2-1801 (1NC), CJX2-1811 (1NO+1NC) matches the auxiliary-contact configuration of this model.

Typische Anwendungen

Direct-on-line switching of 3-phase motors, Fans, Wasserpumpen, Kompressoren, HVAC-Systeme, low-voltage switchgear, star-delta starters, Förderbänder; Standard AC-3 motor loads; Up to 32A for AC-1 resistive loads.

Fehlerbehebung & Wartungshinweise

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.

Anwendungsgebiete von Schneider 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. Industriemaschinen & Ausrüstung

Direct start-stop control for 3-phase asynchronous motors: Förderbänder, Mischer, Schleifmaschinen, kleine Pumpen, Luftkompressoren, Lüftungsventilatoren.

Machine-tool equipment: Drehmaschinen, Fräsmaschinen, Verpackungsmaschinen, 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. HVAC (Heizung, 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. Building Services & Stromverteilung

Factory power panels, compact low-voltage distribution cabinets.

Wasserversorgung & Drainage: Abwasserpumpen, Druckerhöhungspumpen, drain-pump control.

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

4. Heben & Logistiklager

Small hoisting mechanisms, Förderanlagen, Sortierausrüstung.

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.

Anwendungsbeschränkungen (Ungeeignete Szenarien)

1. Not intended for DC main-circuit switching (DC-type contactor required).
2. Avoid extremely frequent jogging / Hochtaktbetrieb, 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

Überlastschutz: LRD series thermal overload relays

Auxiliary-contact expansion: LADN auxiliary contact blocks

Coil surge suppression: LADRC surge suppressors to reduce electromagnetic interference