For operation in installations which are subject both to considerable variations in the control voltage and to high ambient temperatures, e.g. railway applications under extreme climatic conditions, rolling mills, etc.

Also for control supply voltages with battery buffering to extend the operating time in the event of battery charge failure.

Contactor relays with conventional coil

Control and auxiliary circuits

These auxiliary contactor relays have an extended operating range from 0.7 to 1.25 x U_s; the coils are fitted with varistors as standard. An additional series resistor is not required.

Note

An additional auxiliary switch block cannot be mounted

Side-by-side mounting

A clearance of 10 mm is required for side-by-side mounting at ambient temperatures > 60 °C в‰¤ 70 °C.

Contactor relays with series resistor

Control and auxiliary circuits

The DC solenoid systems of the contactor relays are modified (to holding excitation) by means of a series resistor.

The contactor relays are supplied prewired with a plug-on module containing the series resistor. A surge suppressor (varistor) is integrated.

Circuit diagram

A 4-pole auxiliary switch block (according to EN 50005) can be fitted additionally.

Side-by-side mounting

Side-by-side-side mounting is permissible at ambient temperatures up to 70 °C.