CWB65 (3-pole 65 A)
WEG · CWB 40–65 A frame (55 mm)
65 A CWB covering 40 HP @ 460 V. Frequent replacement for legacy CWM65 in Brazilian- and Asian-built screw compressor panels.
Ratings
- AC-3 (440 V)
- 65 A
- AC-1 (resistive)
- 90 A
- Hp (3Φ)
- 20 HP @ 230 V · 40 HP @ 460 V
- Electrical life
- ≈ 1 million ops at AC-3
- Three-phase HP
- 20 HP @ 230 V · 40 HP @ 460 V
Coil data
- Available coil voltages
- 24, 110–120, 208–240, 380–415, 440–480 VAC; electronic wide-range
- Inrush VA
- ≈ 250 VA
- Sealed (holding) VA
- ≈ 18 VA
- Pickup voltage
- ≥ 80% of rated
- Dropout voltage
- ≈ 40–65% of rated
Typical measured coil resistance (±15%, ballpark)
24 VAC≈ 3–7 Ω
120 VAC≈ 50–110 Ω
240 VAC≈ 220–450 Ω
480 VAC≈ 800–1,700 Ω
OL = open coil · near zero = shorted turns · coil-to-frame must read >1 MΩ.
Coil resistance checker
Pick the coil voltage, enter your meter reading across A1–A2 (coil disconnected), and compare it to the expected ballpark.
Ω
This model (24 VAC table value)3 Ω–7 Ω
Generic mid-frame 24 VAC4 Ω–9 Ω
OL = open coil. 0–2 Ω = shorted turns (often from a cooked transformer). Ballpark only (±15%+); electronic wide-range coils (e.g. ABB AF) read misleading values — test those at rated voltage instead. Always measure coil-to-frame too: must be >1 MΩ.
Terminals & accessories
Power/coil terminals: Lug to 35 mm² / 2 AWG; coil front
Auxiliary contacts: 2 built-in (1NO+1NC); expandable to 6
Companion overload: RW117 thermal (separate mount) or electronic motor protection relay
Cross-references
- Schneider LC1D65
- Siemens 3RT2044
- ABB AF65
- Allen-Bradley 100-C60
- Eaton XTCE065E
- Legacy WEG CWM65
Field notes
- Discoloured T-terminal insulation with clean tips almost always means a loose lug, not a worn contactor.
- On a 40 HP unit starting across-the-line, expect ~6× FLA inrush — the tips are rated for it, but repeated restarts within a minute are not.
- Check the moving-armature air gap for compressor scale/dust; a gritty gap causes buzz that mimics low control voltage.
WEG resources
Links go to the manufacturer's current catalog or product page — model-specific pages are often retired, so these stay live.
Manufacturer documentation