Two-Speed Dahlander Switches
A two-speed Dahlander switch is a cam switch that changes the winding ends of a three-phase asynchronous motor with a Dahlander winding between the low-speed and high-speed connections. It is used to change speed by hand on fan, pump, machine tool and conveyor motors that obtain two different speeds from a single winding. The category includes Metop brand models in currents such as 16 A, 25 A, 40 A, 63 A and 125 A, with a 1-0-2 arrangement and continuously rotating models that repeat the 0-1-2 sequence. Choose the current according to the larger of the motor's two nameplate currents at the two speeds, the position arrangement according to how the machine is used, and compare the connection with the motor's terminal block diagram. A Dahlander switch must not be confused with the switch for two-speed motors with separate windings; in a Dahlander connection the pole count of a single winding is changed, and the wiring diagram is different.
Products
- Metop 63A Two-Speed Motor Switch, Dahlander 1-0-2 — Metop · SKU: MT054 - 63A · TRY 2,107.84 · Made to order
- Metop 25A Two-Speed Motor Switch, Dahlander 1-0-2 — Metop · SKU: MT054 - 25A · TRY 896.56 · Made to order
- Metop 16A Two-Speed Motor Switch, Dahlander 1-0-2 — Metop · SKU: MT054 - 16A · TRY 668.08 · Made to order
- Metop 32A Two-Speed Motor Switch, Dahlander 1-0-2 — Metop · SKU: MT054 - 32A · TRY 1,087.52 · Made to order
- Metop 40A Two-Speed Motor Switch, Dahlander 1-0-2 — Metop · SKU: MT054 - 40A · TRY 1,699.60 · Made to order
- Metop 32A Two-Speed Motor Switch, Continuous Rotation, Dahlander 0-1-2-0-1-2-0 — Metop · SKU: MT696 - 32A · TRY 1,087.52 · Made to order
- Metop 100A Two-Speed Motor Switch, Continuous Rotation, Dahlander 0-1-2-0-1-2-0 — Metop · SKU: MT696 - 100A · TRY 3,650.64 · Made to order
- Metop 50A Two-Speed Motor Switch, Continuous Rotation, Dahlander 0-1-2-0-1-2-0 — Metop · SKU: MT696 - 50A · TRY 1,843.52 · Made to order
- Metop 125A Two-Speed Motor Switch, Dahlander 1-0-2 — Metop · SKU: MT054 - 125A · TRY 4,142.88 · Made to order
- Metop 100A Two-Speed Motor Switch, Dahlander 1-0-2 — Metop · SKU: MT054 - 100A · TRY 3,650.64 · Made to order
- Metop 50A Two-Speed Motor Switch, Dahlander 1-0-2 — Metop · SKU: MT054 - 50A · TRY 1,842.40 · Made to order
- Metop 80A Two-Speed Motor Switch, Continuous Rotation, Dahlander 0-1-2-0-1-2-0 — Metop · SKU: MT696 - 80A · TRY 2,498.72 · Made to order
- Metop 25A Two-Speed Motor Switch, Continuous Rotation, Dahlander 0-1-2-0-1-2-0 — Metop · SKU: MT696 - 25A · TRY 892.64 · Made to order
- Metop 20A Two-Speed Motor Switch, Dahlander 1-0-2 — Metop · SKU: MT054 - 20A · TRY 793.52 · Made to order
- Metop 125A Two-Speed Motor Switch, Continuous Rotation, Dahlander 0-1-2-0-1-2-0 — Metop · SKU: MT696 - 125A · TRY 4,142.88 · Made to order
- Metop 63A Two-Speed Motor Switch, Continuous Rotation, Dahlander 0-1-2-0-1-2-0 — Metop · SKU: MT696 - 63A · TRY 2,107.28 · Made to order
- Metop 20A Two-Speed Motor Switch, Continuous Rotation, Dahlander 0-1-2-0-1-2-0 — Metop · SKU: MT696 - 20A · TRY 794.64 · Made to order
- Metop 80A Two-Speed Motor Switch, Dahlander 1-0-2 — Metop · SKU: MT054 - 80A · TRY 2,499.28 · Made to order
- Metop 40A Two-Speed Motor Switch, Continuous Rotation, Dahlander 0-1-2-0-1-2-0 — Metop · SKU: MT696 - 40A · TRY 1,699.60 · Made to order
- Metop 16A Two-Speed Motor Switch, Continuous Rotation, Dahlander 0-1-2-0-1-2-0 — Metop · SKU: MT696 - 16A · TRY 667.52 · Made to order
- Siemens 3LF0122-4TH00 Main Control Switch Two-Speed (D-YY) Switch (0-1-2) — Siemens · SKU: 3LF0122-4TH00 · TRY 2,951.00 · Made to order
How to choose Two-Speed Dahlander Switches
A two-speed Dahlander switch is a cam switch that changes the winding ends of a three-phase asynchronous motor with a Dahlander winding between the low-speed and high-speed connections. It is used to change speed by hand on fan, pump, machine tool and conveyor motors that obtain two different speeds from a single winding.
- Separate overcurrent/leakage protection, motor starting and local isolation requirements.
- Select rated current, pole count and breaking capacity (kA) from the installation calculation.
- Match coil voltage, auxiliary contacts and tripping curve to the control circuit and load type.
Frequently asked questions
What is Two-Speed Dahlander Switches and where is it used?
A two-speed Dahlander switch is a cam switch that changes the winding ends of a three-phase asynchronous motor with a Dahlander winding between the low-speed and high-speed connections. It is used to change speed by hand on fan, pump, machine tool and conveyor motors that obtain two different speeds from a single winding.
What should I compare when choosing Two-Speed Dahlander Switches?
Choose the current according to the larger of the motor's two nameplate currents at the two speeds, the position arrangement according to how the machine is used, and compare the connection with the motor's terminal block diagram.
Where can I find technical details for Two-Speed Dahlander Switches products?
A Dahlander switch must not be confused with the switch for two-speed motors with separate windings; in a Dahlander connection the pole count of a single winding is changed, and the wiring diagram is different.
Two-Speed Dahlander Switches Selection Guide: Technical Criteria & Application Standards