Main Catalogue Automation Systems 2004/2005 - Eaton Moeller - #9

drives, whose energy consumption is elec­tronically matched to the power required in each case.

The new solution, now for the first time also used in the lower rating range, offers customer-orientated benefits: DC and AC contactors are iden­tical in their physical size. This significantly reduces the contactor width - down to match that of protec­tive circuit-breakers. In addition, it enables auxiliary contacts to be integrated into the base units. Moeller has signifi­cantly improved the performance of the drives and the ratio between actual switched load and the auxiliary power required. All the contactor drives with current ratings above 12 A and up to 150 A, i.e. 75 kW motor rating, have a DC sealing consumption of just 0.5 to 1.5 Watt. Furthermore, all the DC drives have a built-in suppressor circuit.

The voltage tolerance of the magnet systems in the DC oper­ated contactors - with 24 V

drives - by far exceeds that specified by the

AC and DC contactors can also be used together. The reduced mounting depth of the DC oper­ated contactors is of great benefit for equipping small and non­standard enclosures. The reduc­tion in component width and width adjustment to match protective circuit-breakers now enable optimisation of the layout in the switchgear cabinet. Motor­starters up to 15 kW now fit on to 45 mm wide busbar adapters.

The new standard xStart contac­tors up to 32 A can be actuated directly from a PLC. The new magnet system for contactors above 12 A is now supported

example for safety interlocking are now a possibility.

xStart drastically reduces mounting and wiring times by allowing standard components to be combined into motor-starters - quickly and without errors. For direct-on-line starters, the user simply push-fits the components together with a click. For reversing starters, the time-consuming wiring of terminal points is reduced. The xStart modular tool-less plug connection offers to users an optional neutral interface between the standard switching devices PKZM0 motor-protective circuit-breaker and DILM contactor in the current range up to 12 A - without any extra cost. The optional interface contacts the corresponding auxil­iary and/or main contacts in the switchgear.

The direct-on-line starter, as a complete unit, always consists of a PKZM0 motor-protective circuit-breaker and a DILM contactor. These two components are mechanically linked via a plug-in connection module. A plug-in contact module designed for tool-less connection provides the electrical link between motor-protective circuit-breaker and contactor. This switchgear combi­nation can then be mounted directly on a carrier rail, without the need for an adapter.

The new magnet system is the heart of the contactors. Based on our traditionally extensive engi­neering expertise, Moeller is again setting standards with this generation of contactors, and at the same time increasing the economic benefits of the product system. This new generation of contactors is equipped with DC

electronically in such a way that the power consumption of the drive is matched to the power required by the contacts. The power required is greater while the contacts are closing than once they are closed. This power matching also prolongs the contact life, because the absence of surplus energy significantly reduces contact bounce.

Another benefit of the new drives lies in the integration of a high-speed suppressor circuit. The suppressor reduces the breaking voltage peaks of the operating coils to a safe level. This saves having to provide an external suppressor circuit. Contacts between electronics outputs and contactor coils, for

Standards, thus

providing extraordinary compatibility with elec­tronics and the under-voltage and overvoltage protection necessary for practical application. Furthermore, Moeller offers the option of directly connecting DC operated contactors up to 32 A to many elec­tronic control systems, without additional coupling relays being

SAFETY PLUS at overvoltage

SAFETY PLUS at

required.