WEG CWCA & CWMC Contactors
IEC contactors engineered for reliable motor starting up to 800 A.
WEG CW series contactors combine compact footprints with robust AC-3 ratings, modular coil options, and accessory flexibility. Build across-the-line, reversing, and two-speed starters while maintaining coordinated protection with MPW breakers and RW overloads.
Power Ratings
9–32 A AC-3, 3 HP @ 230 V to 20 HP @ 460 V, DIN-rail mounting.
9–105 A AC-3, 5–60 HP @ 460 V with interchangeable coils and top/bottom aux contacts.
150–800 A AC-3 with bolt-on terminals, fan kits, and pre-engineered CEP enclosed starters.
Control Voltages
24, 48, 110/120, 220/240, 440/480 VAC with wide tolerance for unstable supply conditions.
12, 24, 48, 60, and 110 VDC with electronic coil suppressors and reduced inrush options.
Electronic coils cover 100–250 VAC/DC, perfect for global panels and retrofit kits.
Accessories
- Side-mount auxiliary contacts (1NO/1NC, 2NO/2NC) and top-mount timer modules.
- Mechanical and electrical interlocks for reversing or two-speed starters.
- Surge suppressors, interface relays, and terminal shrouds for UL 508A compliance.
- Busbar adapters, power distribution blocks, and CEP enclosed starter packages.
Performance Highlights
- High electrical endurance up to 1.5 million AC-3 operations.
- Operating temperature -25 °C to +60 °C with optional tropicalized kits.
- Built-in mechanical indicator, lockable manual override, and easy coil replacement.
- Finger-safe IP20 terminals and DIN rail or screw mounting out of the box.
Engineered Starter Building Blocks
Coordination Ready
Type 1 and Type 2 coordination charts pair CW contactors with MPW breakers, RW overloads, and fusing up to 65 kA.
Modular Control
Plug-in aux contacts, timing modules, and suppressors snap on without tools to support complex motor sequences.
Global Certifications
UL, CSA, CE, and IEC approvals plus optional marine certifications simplify export projects.
Serviceability
Wide terminal spacing, coil access ports, and mechanical status indicators reduce downtime during maintenance.
CW Series Selection Guide
| Frame | AC-3 Rating @ 460 V | Typical Coil Options | Notes |
|---|---|---|---|
| CWMC Mini | 9–32 A (3–20 HP) | 24, 48, 110/120 VAC and 24 VDC | Compact DIN rail mounting, reversible coil terminals, front-mount aux contacts. |
| CWCA/CWCC | 9–105 A (5–60 HP) | 24, 48, 110/120, 220/240 VAC; 24, 48, 110 VDC | Common accessories across sizes, mechanical interlocks, top-mounted timers. |
| CWF/CWX Power | 150–420 A (75–250 HP) | 110/120, 220/240 VAC; 110 VDC | Includes blowout magnets, fan kits, and bolt-on terminals for high-current switching. |
| CEP Starters | Up to 150 HP @ 480 V | Control transformers, HOA selectors, pilot devices | Factory-built enclosed packages with wiring diagrams, short circuit ratings, and options for bypass. |
Starter & MCC Integration
Gross Automation delivers contactor assemblies as loose components or fully wired starter buckets. Our engineers coordinate short-circuit studies, panel layouts, and PLC integration for seamless deployment.
- Build-to-print or engineered CEP enclosed starters with HOA selectors and pilot lights.
- UL508A panel packages pairing drives, soft starters, and contactors with shared bus structures.
- Pre-configured wiring harnesses and terminal schedules for MCC retrofits.
- PLC500 logic and diagnostics mapping for motor control centers and skid panels.
Engineering Deliverables
Coordination Studies
Validated combinations of contactors, overloads, fuses, and short-circuit protectors.
Wiring Diagrams
Point-to-point schematics with field terminations, interlocks, and control transformer details.
Commissioning Support
Site startup assistance, torque verification, and thermal setting validation by our field team.
Documentation & Resources
- CW contactor catalog with dimensional drawings and accessory compatibility.
- Type 1/Type 2 coordination tables covering MPW breakers, fuses, and overload relays.
- Starter assembly checklists for reversing, two-speed, and wye-delta applications.
- Motor control center bucket retrofit templates with wiring harness layouts.
Need Custom Starter Panels?
Send us your single-line diagrams or load schedules. We’ll engineer coordinated starters, specify enclosures, and provide full drawing packages with bill of materials.
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