Schneider LC1D18M7 AC Contactor

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

Decodifica del modello

LC1D: Serie TeSys D 3-contattore CA a polo

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.

Specifiche elettriche principali

Terminal Assignment

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

Bobina: A1, A2 → AC220V power supply

Ausiliario: 13-14 (NONormalmente aperto), 21-22 (NC Normalmente Chiuso)

Selezione & Sostituzione

1. Direct compatible domestic equivalent: LC1D18M7C (Local production, identical footprint, current and coil rating, ampiamente utilizzato nei progetti)
2. Coil voltage variants:

LC1D18B7: AC24V

LC1D18F7: AC110V

LC1D18Q7: AC380V

3. Domestic compatible alternatives: CJX2-1810 (1NO), CJX2-1801 (1NC), CJX2-1811 (1NA+1NC) matches the auxiliary-contact configuration of this model.

Applicazioni tipiche

Direct-on-line switching of 3-phase motors, tifosi, pompe dell'acqua, compressori, Sistemi HVAC, low-voltage switchgear, star-delta starters, nastri trasportatori; Standard AC-3 motor loads; Up to 32A for AC-1 resistive loads.

Risoluzione dei problemi & Note sulla manutenzione

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.

Campi di applicazione di 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. Macchinari industriali & Attrezzatura

Direct start-stop control for 3-phase asynchronous motors: nastri trasportatori, miscelatori, smerigliatrici, piccole pompe, compressori d'aria, ventilatori.

Machine-tool equipment: Torni, fresatrici, macchine per l'imballaggio, 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 (Riscaldamento, Ventilation and Air-Conditioning)

Central air-conditioning units, cabinet fans, cooling-tower fans, pompe di circolazione dell'acqua.

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 & Distribuzione dell'energia

Factory power panels, compact low-voltage distribution cabinets.

Approvvigionamento idrico & drenaggio: 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. Sollevamento & Magazzino logistico

Small hoisting mechanisms, sistemi di trasporto, attrezzature per lo smistamento.

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.

Limitazioni dell'applicazione (Scenari non adatti)

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

Accessori coordinati comuni

Protezione da sovraccarico: LRD series thermal overload relays

Auxiliary-contact expansion: Blocchi contatti ausiliari LADN

Coil surge suppression: LADRC surge suppressors to reduce electromagnetic interference