Dry-running protection system

To protect the pumps from a dry run, a float switch or an electrode can also be installed in the well:

• Contact type: Normally open contact
• Float switch operating principle:
• Top contact = closed
• Bottom contact = open

Functional principle

• Dry-running level too low
• The pump switches off after the delay time (menu 5.62) has elapsed. An error message appears on the display and an alarm sounds.
• Dry-running level is exceeded again.
• The pump switches on again after the delay time (menu 5.63) has elapsed. The alarm and the error message are automatically reset.