Load
Status Indication - Local and Remote
Equipment that processes chemicals, solvents, asphalt, plastics, dyes,
textiles, plus dryers and curing ovens use multiple electric heating
elements during their operation. Sensing the current flow through the
heater element is the only sure way to determine if the heater is
operating correctly. A convenient, low cost method of monitoring a bank of
heaters is to install current flow indication LEDs. A low cost current
indicator like the LCS with the LPM panel mount LED is easy and fast to
install, and safe to operate. When the LCS senses between 5 and 50 amps
flowing through the monitored conductor, it energizes the LPM indicator.
The advantages of this system include: total isolation between the
monitored load and the indicator; the sensor can be located 500 ft. from
the LED indicator; and connection is accomplished using safe, low cost
Class II wiring procedures. Further, the current sensor can be located
anywhere along the monitored wire; it could be hundreds of feet or even
miles away from the monitored load. The LCS sensor hangs on the monitored
conductor and the LPM indicator snaps into a status panel. With the LPM
located next to the temperature controller’s indicator, the operator can
see when a heater fails. If the temperature control’s LED is illuminated
and the LPM is not, the heater has failed open. By reverse indication, it
also shows if the heater’s solid state relay has failed in the shorted
condition.
|
