Schneider LC1G150KUEN High Power Contactor

Model Coding Explanation (Global Version Nomenclature)

LC1G 150 KUE N

LC1G: TeSys Giga New Generation High Power Contactor Series

150: Rated operational current 150A under AC-3 @440V

KUE: Wide-range electronic coil 100～250V AC/DC (AC & DC universal)

N: Global Standard Version

Distinction: KUEC = China Localized Version; KUEN = Global Export Standard Version

2. Main Electrical Specifications

3. Core Features
4. Standard Contact Wear Diagnosis (CWD)

Equipped with health/alarm indicator lights, supporting predictive maintenance; remote contact wear monitoring via external diagnostic module.

2. Modular Replaceable Main Contact Assembly

Only the contact unit needs replacement instead of the whole contactor, reducing maintenance costs.

3. Flexible Mounting

Mountable at any angle; Electronic overload relay LR9G115…225 can be directly fitted underneath; Reversing configuration available with mechanical interlock LA9G970.

4. Low Power Electronic Coil

Universal for AC & DC; Holding power consumption far lower than traditional electromagnetic coils, strong resistance to voltage fluctuation.

4. Overall Dimensions (Width × Height × Depth)

108 mm × 193 mm × 193 mm

5. Compatibility & Replacement Information
6. Upgrade Replacement for Legacy Models

Original LC1F150 (F Series) can be upgraded directly to LC1G150KUEN.

⚠️ Mounting dimensions and accessory system are changed; busbars and interlock accessories must be replaced with G-series parts:

Mechanical interlock for reversing: LA9G970

Connection busbar: LA9G3760

2. Similar Models within the Series

LC1G150EHEN: Coil 48～130V AC/DC

LC1G150LSEN: Coil 200～500V AC/DC

LC1G150KUEC: Same voltage range, China Domestic Version (KUEN for global export)

6. Typical Application Scenarios

Start/stop control of fans, water pumps, air compressors, conveyors, injection molding machines, central air conditioning, large motors in water treatment plants; Cabinet front-end for variable frequency drives, soft starter bypass, reactive power compensation switching (AC-1 duty).

7. Selection Notes

✅ Coil voltage: 100~250V AC/DC universal; cannot be directly driven by 24V PLC outputs

✅ Distinguish KUEN (Global Version) / KUEC (China Version): Different order codes & supply channels, not interchangeable arbitrarily for procurement

✅ For frequent inching / heavy-duty AC-4 applications, derating or higher model is recommended

Practical Engineering Application Cases of Schneider LC1G150KUEN

Brief Parameter Recap:

3P, AC-3@440V=150A, suitable for 75kW 3-phase asynchronous motors; Coil 100～250V AC/DC wide range; KUEN = Global Export Version; Built-in CWD contact wear diagnosis; Modular replaceable contacts.

Case 1: Direct-On-Line Control Cabinet for Industrial Screw Air Compressor (OEM Assembly)

Operating Conditions

380V, 75kW main motor of screw air compressor, no-load start, 16h daily operation, approx. 120 switching cycles per day; Equipment exported overseas (Southeast Asia, Middle East).

Configuration Scheme

Main Contactor: LC1G150KUEN

Overload Protection: Direct-mounted LR9G115…225 electronic overload relay

Upstream Protection: NSX250N molded case circuit breaker

Selection Advantages

1. Global version KUEN holds CE, UKCA, EAC and other international certifications, suitable for export projects;
2. 100～250V AC/DC universal coil, no coil replacement required when facing control voltage fluctuation at overseas sites;
3. Built-in contact diagnosis indicator, allowing maintenance staff to visually judge contact wear and reduce troubleshooting downtime;
4. Modular contacts: only contact unit replacement on site instead of full contactor change, lowering overseas spare parts cost.

Remark: Light-load startup of air compressors belongs to standard AC-3 duty, sufficient selection margin.

Case 2: Large Circulating Water Pump in Waterworks — Soft Starter Bypass Contactor

Operating Conditions

75kW circulating centrifugal pump in municipal wastewater treatment plant, soft start scheme; After startup, the bypass contactor continuously carries rated current; Long-term uninterrupted operation required by process.

Circuit Layout: Circuit Breaker → Soft Starter parallel with LC1G150KUEN → Pump Motor

Reasons for LC1G150KUEN Adoption

1. Under normal operation, the bypass contactor only breaks rated current (approx. AC-1 duty), ample margin for 150A rating;
2. Wide-range coil adapts to control power voltage fluctuation in pump rooms;
3. Replaceable contact module reduces overhaul cost for continuous-operation waterworks;
4. Built-in 1NO+1NC auxiliary contacts for PLC feedback of bypass status.

⚠️ Risk Warning: If stall shutdown and fault breaking via bypass may occur, selection must follow AC-3 standard, cannot merely size based on AC-1.

Case 3: Chilled Water Pump Control for Central Air Conditioning in Commercial Complex

Operating Conditions

75kW chilled water circulating pump in refrigeration station of large commercial building, controlled by BA building automation system; Control power voltage fluctuates between day and night.

Application Highlights

Wide-range 100～250V AC/DC coil solves low voltage issue in building power distribution;

Mountable at any angle, allowing side installation when cabinet space is limited;

CWD contact wear diagnosis can be connected to building operation platform to realize predictive maintenance;

Smaller cabinet footprint compared with legacy LC1F150.

Case 4: Main Motor Control for Extruder in Rubber & Plastics Industry

Operating Conditions

75kW main drive motor of plastic extruder, stable load, two-shift daily operation; Dusty workshop environment, maximum ambient temperature up to 55℃.

Scheme Key Points

LC1G150KUEN operating temperature range -25℃～+60℃, meets high-temperature workshop condition;

Low holding power electronic coil generates less heat inside cabinet;

Dust-proof accessories can be equipped to reduce contact erosion caused by dust.

Restriction: Frequent inching / forward-reversing operation belongs to AC-4 duty; derating or upgrade to higher model LC1G185 is recommended.

Case 5: Variable Frequency Multi-Drive System工频Bypass Contactor (Fans / Belt Conveyors)

Operating Conditions

Production line belt conveyor system with one inverter driving multiple motors; Automatic switch to power frequency circuit upon inverter fault to guarantee continuous production.

Configuration: Variable frequency contactor + power frequency bypass contactor LC1G150KUEN, equipped with LA9G970 mechanical interlock to prevent simultaneous closing of variable frequency and power frequency circuits causing short circuit.

Value: Standardized TeSys Giga interlock accessories, directly compatible with contactors of the same series; auxiliary contacts can provide secondary confirmation for interlock logic.

Case 6: Capacitor Switching in Low-Voltage Reactive Power Compensation Cabinet (with Series Reactor)

Operating Conditions

Capacitor bank rated current approx. 110A in factory power distribution room; 4.5% series reactor installed to suppress switching inrush current.

Note: LC1G150KUEN is a general AC-3 contactor, not dedicated capacitor switching contactor.

✅ Permissible precondition: Series reactor must be installed to limit inrush current. Direct capacitor switching without reactor is strictly forbidden, which easily causes contact welding.

Industry Selection Table for LC1G150KUEN

Important Selection Distinction Reminders

1. LC1G150KUEN (Global Export Version) VS LC1G150KUEC (China CCC Version)

Consistent electrical performance, but different certifications and order part numbers; KUEN must be selected for export projects.

2. Coil cannot be driven directly by DC24V: Coil operating range 100～250V AC/DC, 24V insufficient for pull-in.
3. For AC-4 frequent reversing & inching duty, upgrade to LC1G185 series.

Mounting Dimensions — Schneider LC1G150KUEN (TeSys Giga 3P 150A)

Unit: mm

1. Overall Envelope Dimensions (Cabinet Layout Reference)

Width W: 108

Height H: 193

Depth D: 193

Standard notation: Width (Left-Right) × Height (Up-Down) × Depth (Front-Back inside cabinet)

2. Mounting Instruction
3. Not compatible with standard DIN rail mounting, only flat backplate screw mounting (differentiated from small LC1D contactors);
4. Fastener specification: M5 screws;
5. Backplate mounting hole pitch:

Horizontal hole spacing: 78 mm

Vertical hole spacing: 164 mm

4. Permitted for mounting at any angle, vertical installation not mandatory.
5. Wiring Key Dimensions (Main Busbar Design)

Center-to-center distance between main phase terminals: 35 mm

Maximum allowable busbar width for terminals: 25 mm

Tightening torque for main circuit terminals: 18 N·m

4. Stacked Dimension with Direct-mounted Overload Relay (LR9G Series)

When LR9G thermal overload relay is directly fitted underneath LC1G150:

Total overall height increases by approx. 72mm;

Reserve ≥80mm clearance at bottom for cable & busbar routing.

5. Critical Reminder for Legacy LC1F150

Overall shape and mounting hole layout not interchangeable with LC1F150. Retrofit in existing cabinets requires new holes on backplate.

Sheet Metal Cutout Specification for LC1G150KUEN (Directly Forward to Sheet Metal Manufacturer)

Device: Schneider TeSys Giga LC1G150KUEN 3-pole Contactor

Unit: mm

1. Contactor Overall Envelope (Cabinet Space Reservation)

Overall size: W108 × H193 × D193

Recommended clearance inside cabinet: ≥30mm top, ≥40mm bottom, ≥25mm left & right sides

2. Backplate Mounting Holes (4 mounting holes for M5 screws)

Fastener specification: M5

Center-to-center horizontal hole distance: 78

Center-to-center vertical hole distance: 164

Recommended hole diameter: Φ5.5 (allows minor alignment adjustment)

Hole Layout Description (For CAD Drafting)

Four mounting holes arranged in rectangle:

Horizontal centerline span 78mm, vertical centerline span 164mm; symmetric about contactor vertical and horizontal centerlines.

3. Main Circuit Wiring Clearance (Busbar / Cable Design)

Center-to-center distance between 3-phase main terminals: 35

Maximum compatible busbar width for terminals: 25

Tightening torque of main terminals: 18 N·m

Wiring suggestion: Reserve ≥60mm depth forward of terminals for cable lugs and wrench access

4. Additional Dimension with Direct-mounted LR9G Overload Relay

After LR9G thermal overload relay fitted underneath contactor:

Total overall height = 193 + 72 = 265mm

Reserve ≥80mm clearance at bottom.

5. Important Notes (Must be passed to sheet metal workshop)
6. This model cannot be DIN rail mounted; only flat backplate screw mounting;
7. Mountable at any angle, vertical installation not required;
8. Cannot reuse cutout layout for LC1F150; retrofitting existing cabinets requires new drilling;
9. Reserve ventilation gap behind contactor for cabinets with high ambient temperature.

Brief Version (Copy directly for sheet metal supplier)

Device: Schneider LC1G150KUEN Contactor

Overall dimension: W108×H193×D193

Mounting holes: 4×Φ5.5, fixed with M5 screws

Hole center distance: Horizontal 78mm, Vertical 164mm, rectangular symmetric layout

Not compatible with DIN rail mounting; Cutout layout not interchangeable with LC1F150