Motor switches

Motor rated current

Type the rated current of the motor in amperes. The list then shows only those motor switches whose overload setting range includes that value. There are thirteen ranges, from 0.1–0.16 A up to 20–25 A. Example: 1.2 A matches the 1.0–1.6 A range.

Options

Every motor switch in this series already protects the motor against overload, short-circuit, overheating and loss of a supply phase. This filter only chooses two extras fitted at the factory: an undervoltage release and auxiliary signalling contacts.

Basic — power poles only, from the incoming supply to the motor. There is no undervoltage coil and no extra signalling contacts. Choose this when the large 97 millimetre knob is enough to start and stop the motor by hand.

Undervoltage — an extra coil on terminals marked D1 and D2. If the supply voltage falls too low, the switch disconnects the motor. When voltage returns, the switch stays off until someone turns the knob again. That stops a machine restarting on its own in an explosive atmosphere — for example a conveyor or feeder that must not run unattended.

Auxiliary contacts — two extra contacts that do not carry motor current. Terminals 13 and 14 are normally open: they close when the switch is on, for a controller input, a lamp or a start permit. Terminals 21 and 22 are normally closed. They are rated 1 ampere at 230 volts in a control circuit, for cables of 1 to 2.5 square millimetres.

Both options — the undervoltage release and the auxiliary contacts in one enclosure.

Overload trip range

This is the window in which the overload release can be set, in amperes. There are thirteen windows, from 0.1–0.16 A up to 20–25 A. You can select one or more ranges here, or type the motor rated current in the field above. Both filters can be used together.