Kraus & Naimer CA20 A440 Two-Speed (Dahlander) Cam Switch, 3-Pole, 25 A, 48 x 48 mm Front Plate
- Brand: Kraus & Naimer
- SKU: CA20 A440
- MPN: CA20 A440
- Model: 25 A
- Price: 3020.00 TRY + VAT · incl. VAT 3624.00 TRY
- Availability: Made to order
- Two-Speed Dahlander Switches
- Kraus & Naimer Two-Speed Dahlander Switches
- Selection guide: What Is a Dahlander Switch? Two-Speed Motor Switch Types and Selection
Kraus & Naimer CA20 A440 is a 3-pole, 25 A two-speed (Dahlander) cam switch with 0-1-2 positions for single-winding motors. Technical values: CA20 type, size class S0, 48 x 48 mm front plate; thermal current Ith 25 A (55 °C), enclosed thermal current Ithe 25 A; rated insulation voltage Ui 690 V, rated impulse withstand voltage Uimp 6 kV; AC-21A 25 A, AC-22A 25 A, AC-15 380–440 V 5 A; three-phase motor rating at 380–440 V: AC-3 7.5 kW, AC-23A 11 kW; maximum gG 35 A fuse, Icw 280 A (1 s); conductor cross-section: solid 0.75–4 mm², flexible 1.5–4 mm²; tightening torque 1 Nm; 3 poles, 4 levels, positions 0-1-2, switching angle 60°. Values are given in accordance with IEC 60947-3 and EN 60947-3. It is used to select the speed of single-winding (Dahlander-type) two-speed motors; the 0 position stops the motor.
| Series | CA20 |
|---|---|
| Size Type | S0 |
| Function Code | A440 |
| Switch Function | Çift Devirli (0-1-2) |
| Switch Positions | 0-1-2 |
| Number of Positions | 3 |
| Switching Angle | 60° ° |
| Number of Poles | 3P |
| Number of Levels | 4 |
| Front Plate Code | F073 |
| Front Plate Size (A x B) | 48 x 48 mm |
| Rated Current | 25 A |
| Conventional Free Air Thermal Current (Ith) | 25 A |
| Ambient temperature for rated current | 55 °C (24 hours, tepe 60 °C) |
| Conventional Enclosed Thermal Current (Ithe) | 25 A |
| Rated Insulation Voltage (Ui) | 690 V (AC 50/60 Hz) |
| Rated Impulse Withstand Voltage (Uimp) | 6 kV |
| Overvoltage category | III |
| Pollution Degree | 3 |
| Rated Operational Current AC-15 (Ie) | 220–240 V: 8 A; 380–440 V: 5 A |
| Rated Operational Current AC-20A (Ie) | 690 V: 25 A |
| Rated Operational Current AC-21A (Ie) | 20–690 V: 25 A |
| Rated Operational Current AC-22A (Ie) | 220–500 V: 25 A; 660–690 V: 25 A |
| Rated Operational Power AC-2 (Pe) | 3-phase: 220–240 V 5.5 kW; 380–440 V 11 kW; 500 V 15 kW; 660–690 V 13 kW |
| Rated Operational Power AC-3 (Pe) | 3-phase: 220–240 V 4 kW; 380–440 V 7.5 kW; 500 V 7.5 kW; 660–690 V 7.5 kW. 1-phase: 110–120 V 1.5 kW; 220–240 V 3 kW; 380–440 V 3.7 kW |
| Rated Operational Power AC-4 (Pe) | 3-phase: 220–240 V 1.5 kW; 380–440 V 3 kW; 500 V 3 kW; 660–690 V 3 kW. 1-phase: 110–120 V 0.45 kW; 220–240 V 1.1 kW; 380–440 V 2.2 kW |
| Rated Operational Power AC-23A (Pe) | 3-phase: 220–240 V 5.5 kW; 380–440 V 11 kW; 500 V 11 kW; 660–690 V 11 kW. 1-phase: 110–120 V 1.5 kW; 220–240 V 3 kW; 380–440 V 5.5 kW |
| Maximum Fuse Current | gG 35 A |
| Rated Short-Time Withstand Current (Icw) | 280 A (1 s) |
| Breaking Capacity | 220–240 V: 200 A; 380–440 V: 200 A; 660–690 V: 125 A |
| Power Loss per Pole | 0.9 W |
| Solid Conductor Cable Cross-Section | 0.75–4 mm2 |
| Stranded Conductor Cable Cross-Section | 2x4 mm2 |
| Flexible Conductor Cross-Section | 1.5–4 mm2 |
| Conductor Cross-Section with Ferrule | 1–2.5 mm2 |
| Cable section (AWG/MCM) | AWG 12 (flexible); AWG 10 (solid or stranded) |
| Conductor Material | Copper only (individual strands may be tinned or silver-plated; conductor ends must not be soldered) |
| Tightening Torque | 1 Nm (9 lb-in) |
| Recommended Screw Driver | Pozidriv/Phillips PH1; slotted 0.8 x 5.5 mm (DIN 5264) |
| Contact Type | Rigid bridging link |
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