Low Voltage Reset Type


Eaton's Cooper Power series S.T.A.R. Low Voltage Reset (LVR) faulted circuit indicators are designed to quickly and easily locate faulted sections of underground cable systems. These faulted circuit indicators (FCIs) can be installed on pad-mounted distribution transformers or wherever a secondary voltage source is available.

The secondary voltage source deriving power from the monitored circuit will provide a known reliable source for operating and resetting the Low Voltage Reset FCI, as compared to current reset devices which are subject to system loading variations. Low Voltage Reset faulted circuit indicators provide a reliable means of fault location and isolation. They also eliminate fault chasing methods which are costly, time consuming, and very stressful on the system components.

Catalog Number SL----

Design Features

  • An inrush restraint feature eliminates false tripping and is standard on all units. The S.T.A.R. faulted circuit indicator will ignore inrush currents caused by reclosing operations of protective devices on the system. A dead time of 200 ms will activate the inrush restraint feature.
  • A low pass filter, also a standard feature, will prevent the S.T.A.R. faulted circuit indicator from tripping on high frequency transients like those caused by cable capacitive discharges.
  • Another standard feature is the reset restraint circuit. It prevents the premature resetting of faulted circuit indicators caused by feedback voltages of less than 90 VAC (Standard LVR Type; reset restraint for LVR with Universal Power Supply options is 60% of nominal secondary voltage).
  • In addition, the S.T.A.R. faulted circuit indicator is equipped with temperature compensation circuitry to assure accurate, reliable performance over the entire specified temperature range.
  • The quick response time of the Low Voltage Reset S.T.A.R. faulted circuit indicator allows easy coordination with current-limiting fuses.
  • The unit is insensitive to primary line voltage and will operate on any cable system. This unique combination of standard features makes the S.T.A.R. faulted circuit indicator extremely reliable.