A manually operated main switch must be provided for each mains feed in order to disconnect the machine's electrical equipment from the mains (e.g. when work on the electrical equipment is to be done).
At every control point and workplace where an emergency-off function is required, such devices must be present. They must mechanically snap into place automatically and be positioned where they can be easily reached.
DL switches fulfil the circuit-breaking conditions as per EN for 1000V.
The terminals have individual terminal clamp covers for cable lug and power bus connection on the mains input side. The DHV twin-lever handle has a locking mechanism for 4 padlocks.
The switches can also be supplied in 4-pole format with switchable neutral conductor and an auxiliary switch.
DL series cam circuit breakers fulfil the requirements made by DIN EN 60204 Part 1, clause 5.3 of manually operated main switches. It stipulates that a circuit breaker compliant with EN 60947-3 must be designed for category of use AC-23B.
The repair switch is an enclosed main switch with an emergency-off function for an individual electrical consumer.
Its installation in the immediate vicinity of the motor or of the electrical consumer unit enables each worker when carrying out maintenance work to hook on their padlock (max. 3) and thus protect themselves from anyone else switching it on without permission.
Important factors in the choice of repair switch are its compatibility with the connected rating, breaking capacity, cable profiles, housing size and metric cable glands.
For use in these varying conditions we offer 3-, 4- and 6-pole switching devices with and without auxiliary contacts.
Taken into the account in the design of these devices are the VDE provisions of DIN EN 60204 Part 1, section 7.5 (protection against automatic restarting when power is restored following a power cut)
Elektra S series main switches with a low voltage circuit breaker provide protection against automatic restarting when power is restored following a power cut. They fulfil the requirements of DIN EN 60204 Part 1, clause 7.5 by means of a low-voltage circuit breaker coil, which has a mechanism that after any power cut causes the switch to jump back into the 0 position. If there is no power, the switch cannot be turned on.
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Main switches - Emergency-off switches S series with undervoltage release.
The safety contact constantly monitors that the connection between the emergency off button and the contact element is as it should be. If due to negligent fitting or mechanical damage the emergency off button becomes detached from the contact element, the safety contact cuts in immediately and the machine gets shut down.
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VN series cam switches are manually operated cam switches suitable for an extremely wide range of uses and with practically unlimited switching possibilities. The cam switch's base unit forms the contact chamber with the cam wheel for function control. Each chamber contains 2 double break contacts, with the moving contact bridges being controlled by the cam wheel via the contact slides. The opening of the contacts happens positively. VN switches can therefore be universally used and can be built as control switches, instrument switches, motor switches or main switches. The VN series includes a range of different sizes. The VN series cam switches have been developed, made and tested in accordance with the relevant national and international regulations. This line's products fall into the area of applicability of EC Low Voltage Directive 2006/95/EC.
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Download Competence brochure Cam switch [PDF 1,41 MB]
Many of our switches are available in enclosed form and suited to direct switching of motors. They have AC-3 breaking capacities as per EN 60947-3. In addition to the standard units, there are special switches, versions with a fuse block / locking mechanism or with a CEE plug and low-voltage circuit breaker. Motor switches
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EM series motor protection On/Off switches can be supplied in 10 setting ranges from 0.3 to 16 amps. In addition to thermal triggering, the switch can also be supplied with quick KA magnetic triggering or UA low-voltage triggering. Operation by means of insulated T-handle is via a robust switching latch with rotary drive. In the version with low-voltage triggering the EM switches ensure the protection called for in the DIN EN 60204 Part 1 provisions against automatic restarting when power is restored following a power cut. The nominal frequency is 50 Hz. Switches for other voltages with a frequency of 50 or 60 Hz can also be supplied on request.
The MN series motor protection switches are cam switches with thermal over-current trip devices integrated within the switch. The base unit forms the contact chamber with the cam wheel for function control. In the event of excess current, the bi-metals cause the switching latch to be operated via a trip shaft. This interaction enables a multitude of switching programmes with integrated motor protection to be produced. Due to the switching of the bi-metals within the current circuit there are 2 different series in terms of the setting ranges: for On/Off switches, reversing switches, pole-changing switches (1 rotary speed protected) and single-phase starter switches 12 setting ranges of 0.3 to 21.5 amps have been defined.
The star-delta switches are sub-divided into 7 setting ranges of 2.85 to 37 amps, with the bi-metals wired up in such a way that they are in the motor's phase current circuit. The motor coil is thus protected both in the star and the delta position. The current to be set on the setting scale is the motor's rated current. Star-delta switches for extremely difficult starting up are used where - due to the drive system - a long start-up period in the star position is required. So that the motor protection is not triggered during the start-up phase, the bi-metals are placed such that only in the delta position are they connected up in the current circuit. With this form of switching the motor is thus protected only in the delta position.
The machine and device protection switch has been developed for use with standard machines up to a power output level of 4kW in AC-3 at 400V. The combination options of thermal and/or low-voltage triggering enables the appropriate selection of protection function to be offered in connection with the different designs. Even if the handle is jammed, the switch trips via a robust switching latch and prevents any starting up again.
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The Cobra generation of foot-operated switches impresses with modern design and enhanced technology. The FDC and FGC range has been designed for the industries with a high demand for mechanical and electrical switching frequency. Foot-operated switches are used, for instance, on woodworking machines, CNC processing machines, construction machines and bending machines.
The Cobra foot-operated safety switches consist of two system components: foot-operated switch and protective cover. The various different technical features include all contacts' positive opening operation and a pressure point element integrated under the pedal, which when the pedal is sharply pushed down triggers an immediate stop of the machine. The housing design of both system components has been defined in such a way that combining two or more switches side by side creates compact foot-operated switch blocks that form a neatly shaped unit. A core innovation and unparalleled in the field of industrial foot-operated safety switches is the use of an extruded aluminium protective cover that doesn't break even under heavy impact and thus protects the foot from injury. The cover also provides protection from accidental activation.
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The new foot operated switches COBRA