Schneider LC1DWK12P7 Capacitor Contactor

It is a dedicated capacitor contactor of Schneider TeSys D series, designed for inrush-free switching of three-phase capacitor banks in low-voltage reactive power compensation systems. Rated capacity: 63kvar@400V/50Hz, coil voltage: 230V AC.

1. Model Breakdown Explanation

2. Core Specification Parameter Table

3. Optional Accessories List

4. Competitor & Cross-Brand Equivalent Comparison

5. Selection Guidelines & Alternative Solutions

5.1 Three Key Selection Factors

Capacitor Capacity Matching: ≤63kvar for 400V system; ≤104kvar for 690V system, avoid overload

Coil Voltage: Ensure control circuit voltage matches P7 (230V); optional M7(220V)/U7(240V), etc.

Operating Frequency: ≤240 cycles/hour for dynamic compensation; select higher specification or dedicated solution if exceeded

5.2 Recommended Alternative Solutions

5.3 Installation & Maintenance Tips

1. Wiring distance to capacitor bank ≤ 2m, reduce line inductance to guarantee inrush suppression effect
2. Ensure good heat dissipation; reserve ≥50mm clearance around the contactor
3. Inspect damping resistor regularly (once a year); replace in time if abnormal
4. When auxiliary contacts are used in control circuit, pay attention to contact capacity (5A@230V AC)

LC1DWK12P7 is a dedicated capacitor contactor developed by Schneider for low-voltage reactive power compensation. Its core advantage lies in built-in damping resistor and early-make pole technology, which effectively suppresses switching inrush current and extends the service life of capacitors and contacts. It is widely applied in industrial workshops, commercial buildings, data centers and other occasions requiring power factor improvement, and is an ideal choice for reactive power compensation cabinets.

Schneider Capacitor Contactor Model List (TeSys D Series)

1. Product Overview

Schneider TeSys D series capacitor contactors are specially designed for low-voltage reactive power compensation systems. Adopting early-make pole + pre-connected damping resistor technology, they effectively suppress capacitor switching inrush current (≤20× rated current), protect capacitors and contacts, and prolong service life.

Main series:

LC1DWK: 63kvar@400V/50Hz

LC1DTK: 40kvar@400V/50Hz

All models: 3P(3NO) main contacts, 1NO+2NC auxiliary contacts, AC coil only (no DC coil version).

2. Model Naming Rule

3. Complete Model List

3.1 LC1DWK Series (63kvar@400V/50Hz)

3.2 LC1DTK Series (40kvar@400V/50Hz)

4. Coil Voltage Code Comparison Table

5. Core Technical Parameter Comparison
   

   Parameter	LC1DWK12 Series	LC1DTK12 Series	Remarks
   Rated Capacity	63kvar@400V/50Hz	40kvar@400V/50Hz	Rated at ambient temperature ≤60°C
   Rated Current	90A@400V	58A@400V	Calculated by I=Q/(3​×U)
   Number of Poles	3P(3NO)	3P(3NO)	Normally open main contacts, three-phase dedicated
   Auxiliary Contacts	1NO+2NC	1NO+2NC	Instant action for control circuit interlocking
   Mounting Type	35mm DIN rail / screw	35mm DIN rail / screw	WK width 85mm; TK width 70mm
   Protection Class	IP20	IP20	Prevents finger contact with live parts
   Operating Frequency	Max. 240 cycles/h	Max. 240 cycles/h	Meets dynamic compensation demand
   Ambient Temperature	-5°C~+60°C	-5°C~+60°C	Derating required beyond range
   Service Life	10 million / 100,000 cycles	10 million / 100,000 cycles	Under rated conditions
   Mechanical / Electrical

   Selection & Replacement Recommendation

6.1 Three Core Selection Principles

Capacity Matching: Select TK for 40kvar, WK for 63kvar; no overload allowed in 400V system

Coil Voltage: Match control voltage with code (M7=220V for China; P7=230V for Europe)

Operating Frequency: ≤240 cycles/h for dynamic compensation; choose higher specification or thyristor switch if over limit

6.2 Alternative Solutions

Large capacity compensation (>63kvar@400V): Standard contactor (e.g. LC1D40P7) + 6% reactor combination

Ultra-high frequency switching (>240 cycles/h): Thyristor switch (e.g. ATS48 series), no mechanical wear

Cost-sensitive projects: Domestic capacitor contactors (e.g. Chint NC1 series), cost-effective with full basic functions