Small drives and motors with a power output of up to 4 kW are frequently used in control technology and machine design. Sometimes both rotational directions (forward/reverse) need to be controlled and the drives have to be protected. They must also be reliably and safely shut off through an external emergency stop function in the event of a breakdown.
The new MOTUS ContactronControl combines these four important requirements into one device. The unit offers enhanced durability due to its use of hybrid switching technology, resulting in a smooth switching functionality. The built-in semiconductor switches without wear, while the continuous current is carried by a mechanical contact. This keeps the load on the mechanical switching element extremely low, allowing the size of the relay to be considerably reduced. The combination of overload, short-circuit and safety functionality, integrated into a single device also guarantees minimal connection effort.
The MOTUS relies on CrossLink technology. The device is supplied with an adapter for the 60mm-System classic or for DIN rail mounting. With all versions, the contacts of the CrossLink adapter remain covered to protect them from being touched when the electronics module device is removed. Three current designs are available in the range from 0.075 to 9 A and the devices can be finely adjusted within each of these ranges.
Safety featuresIn case of an overload or short circuit, the built-in electronics safely shut down. In special fault causes, the integrated fuses provide additional protection. The fuses are simply replaced and the device is ready to go again. Due to its narrow, 22.5mm design, the starter can deliver space savings of up to 75% compared to conventional starter combinations. A significant reduction in wiring requirements during installation also saves time by up to 75% compared to conventional combinations. Robust relay technology combined with frictionless semiconductor switching extends product lifespan.
The busbar system technology has undergone continuous development in recent years. Tried and tested solutions are now available for a range of applications, both for fuses and for electromechanical switchgear. The combination of electronics and busbars is opening up new perspectives. Benefits range from increased security to energy efficiency and from space-savings to effective operation of the systems. Wohner and its industrial electronics partner Phoenix Contact Electronics, has developed the motor starter MOTUS ContactronControl on the basis of hybrid technology.
The change in standards means concepts for functional safety have to be revised. The arrangement of multiple independent interruptions in each circuit and the provision of additional measures enable safety category 3 with performance level ‘e’ to be achieved. The devices have a self-diagnostic feature that recognises internal errors and rules out any malfunction. In extreme fault causes, the integrated fuses provide additional protection. After replacing the fuses, the device is ready to use again. Co-ordination type 2 is achieved with this protection.
Figure 1 The MOTUS ContactronControl motor starter is based on hybrid technology
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