Compact Footprint
High-density frame sizes with DIN-rail or panel mounting keep enclosure layouts tight while maintaining clearances.
Contactors & Motor Starters
CW series contactors with matched overloads, coil options, and accessories for IEC and UL508A panels.
WEG delivers compact CWMC mini contactors through CWCA/CWMB power frames up to 800 A. Combine reversible wiring kits, mechanical interlocks, and plug-in auxiliaries to create across-the-line, reversing, or two-speed starters. Gross Automation engineers coordinate overload protection, short-circuit ratings, and control wiring to simplify assembly.
Key Differentiators
Wide Coil Range
AC and DC coils from 12 V to 690 V with built-in surge suppression and low consumption for PLC outputs.
Starter Kits
Factory CEP assemblies bundle contactor, overload, and enclosure hardware to fast-track motor starter packages.
System Coordination
UL Type 1 and Type 2 coordination tables pair CW contactors with MPW motor protectors and fuse/disconnect options.
Starter Building Blocks
Contactor Families
- CWMC mini contactors up to 9 A with auxiliary contact blocks and reversing kits.
- Standard CWCA power contactors 9–105 A with plug-in surge suppressors.
- Heavy-duty CWMB/CWMX frames 150–800 A with replaceable coils and mechanical latching.
- DC contactors and elevator duty options for specialized applications.
Starter Accessories
- Mechanical and electrical interlocks for reversing starters.
- Top- or side-mount auxiliary contact blocks up to 4NO/4NC.
- Thermal overload relays (RW series) and electronic relays (RW-E) with selectable trip classes.
- Busbar kits, terminal covers, and wiring harnesses for UL508A compliance.
Engineered Packages
- CEP enclosed starters with HOA selector switches and indicator lights.
- Pre-wired reversing and two-speed starter panels with terminal blocks.
- Contactor/overload combinations optimized for WEG motor/drive packages.
- Arc-resistant starter designs using coordinated current-limiting fuses.
Contactors & Starter Platforms
CWMC Mini Contactors
Compact IEC contactors 6–16 A ideal for PLC-controlled panels and OEM machines.
- 35 mm wide housing with DIN-rail clip and front-mounted auxiliary contacts.
- AC or DC coils down to 12 V with built-in surge suppression for sensitive outputs.
- Reversing kits and mechanical interlocks simplify forward/reverse motor control.
CWB/CWCA Power Contactors
Mainline contactors up to 105 A AC-3 that anchor most WEG starter assemblies.
- Plug-in auxiliary blocks, suppressors, and timers reduce panel wiring time.
- Coils available 24–690 VAC/DC with wide voltage tolerance for global projects.
- UL Type E combination motor controllers when paired with MPW breakers.
CWMB/CWMX Heavy Duty
High-current frames 150–800 A for cranes, pumping stations, and heavy industry.
- Replaceable coils and arc chutes extend service life in demanding duty cycles.
- Mechanical latching and low-power coil options for energy savings.
- Compatible with thermal or electronic overloads for Type 2 coordination.
Contactor & Starter Specifications
| Series | AC-3 Current Range | Coil Options | Highlights |
|---|---|---|---|
| CWMC Mini Contactors | 6–16 A (up to 7.5 kW @ 400 V) | 24, 48, 110/120, 220/240 VAC | 12, 24 VDC electronic coils | Front-mount auxiliary contacts, reversing kits, and mechanical interlocks |
| CWB/CWCA Standard Frames | 9–105 A (up to 55 kW @ 400 V) | 24–690 VAC, 24/48 VDC economy coils with suppression | Side-mount auxiliaries, timer blocks, and surge suppressor accessories |
| CWMB/CWMX Heavy Duty | 150–800 A (up to 400 kW @ 400 V) | 110–690 VAC coils plus 24/48 VDC options | High interrupt ratings, replaceable coils, and mechanical latching kits |
| CEP Enclosed Starters | 3–150 HP @ 480 V (NEMA 1/4/12) | Factory-wired control circuits 24/120 V | Integrated HOA stations, overload relay, and short-circuit coordination up to 65 kA |
Applications We Support
Pump & Fan Packages
Coordinate contactors with CFW drives and bypass starters for HVAC and municipal water systems.
Industrial OEM Machines
Integrate multi-speed and reversing contactors into packaging, conveying, and materials handling equipment.
Motor Control Centers
Design MCC buckets with plug-in contactors, quick-disconnect harnesses, and PLC-ready auxiliary contacts.
Reduced Voltage Starters
Pair SSW soft starters with isolation/bypass contactors to meet short-circuit and service entrance requirements.
Starter Engineering Services
Coordination Studies
We deliver UL Type 1/Type 2 tables pairing contactors, overloads, fuses, and breakers for each motor.
Starter Assembly Packages
Receive pre-wired contactor panels with terminal blocks, schematic drawings, and torque documentation.
Lifecycle Support Kits
Plan spare coil, contact, and auxiliary inventories with reorder lists tied to your asset numbers.
Deep Dive: CW Contactors
Visit the CW contactor product page for frame-by-frame comparisons, coil voltage coverage, and starter package deliverables built by Gross Automation.
- AC-3 horsepower tables spanning mini, standard, and power contactor families.
- Accessory matrix detailing interlocks, timers, suppressors, and auxiliary contacts.
- Starter kit templates for across-the-line, reversing, and CEP enclosed assemblies.
Highlights
- Selection guide summarizing AC-3 ratings, coil voltages, and package notes.
- Engineering deliverables for MCC buckets, panel builds, and coordination studies.
- Custom starter consultation form for expedited sizing and documentation.
Documentation & Coordination
- CW contactor catalog with frame sizes, coil codes, and auxiliary accessories.
- Type 1/Type 2 coordination tables for starters up to 65 kA.
- Mechanical interlock and reversing wiring diagrams.
- Starter sizing worksheets for across-the-line and VFD bypass circuits.
Build Support
Our engineering team provides short-circuit studies, panel layout drawings, and recommended spare part kits. Send us your motor list to receive a custom starter schedule.
Start a ProjectPlan Your Next Motor Starter Assembly
Send your motor horsepower and voltage requirements and we will engineer a complete WEG starter package with documented coordination.
Talk with an Engineer