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CONSTRUCTION
Having been designed for heavy
duty the LTHS, LTHH and LTC contactors are guaranteed for a very high number of
operations even under shocks and vibrations. The current breaking circuits of
the contactors are equipped with non direct magnetic blow-out circuits (in
parallel with the main contacts) made with a high nember of turns in order to
work efficiently both with high and low currents. Moreover the indirect
magnetic blow-out system makes the LTHS, LTHH and LTC contactors also suitable
to operate with quite high frequency current. Main pole contacts are designed
for easy cleaning and replacement with normal tools. Relative brushing of the
contact surfaces provide self cleaning and low resistance. D.C. control coils
operate without economy resistors and with wide working range (al least -30%
+30). The high insulation class of the coil guarantees safe operation to very
high ambient temperatures. A "Varistor" cuts off the peak voltage when the coil
is deenergized. When an A.C. supply is necessaryit is possible to fit a silicon
rectifier. |
EXECUTIONS