Contactor relays [t-head1-first]

Contactor relays are often used in control and regulating functions. They are used in large numbers for the indirect control of motors, valves, clutches and heating equipment.

In addition to the simplicity which they offer in project engineering, panel building, commissioning and maintenance, the high level of safety which they afford is a major factor in their favour.

Safety [t-head3]

The contactor relay contacts themselves constitute a considerable safety feature. By design and construction they ensure electrical isolation between the actuating circuit and the operating circuit, in the de-energized state, between the contact input and output. All Moeller contactor relays have double-break contacts.

The German Trade Associations demand that, for control systems of power-driven metalwork presses, the contacts of contactors must be interlocked and opposing. Interlocking means that the contacts are mechanically connected to one another such that N/C contacts and N/O contacts can never be closed simultaneously. At the same time, it is necessary to ensure that the contact gaps are at least 0.5 mm over the entire life, even when defective (e.g. when a contact is welded). The contactor relays DILER and DILA fulfil this requirement.