Freeze Protection Line Sensing Monitor Series

Freeze Protection Line Sensing Monitor Series
  • Standard NEMA 4 Enclosures
  • NEMA 4X Stainless Steel Enclosure Option
  • Hand/Off/Auto Selector Switch
  • 6, 12, 18, 24, 30, 36, and 42 Circuit Options
  • 15, 20, 30, and 50 Amp Single-pole and Double-pole 30 mA Ground Fault Thermal-Magnetic Circuit Breakers
  • 100 and 225 Amp Main Bus
  • Single-phase 120/240 VAC
  • Three-phase 120/208 VAC 4-Wire
  • Three-phase 277 VAC 4-Wire
  • 100 and 250 Amp Main Disconnect Switch Option
  • Ambient and Line Sensing Control
  • WeatherTrace Sentinel Monitoring with Common Alarm and Re-Ring Feature
  • Z-Purge Pressurization System for Class 1, Division 2 Option
  • Enclosure Heater Option for Subzero Ambients
  • UL and cUL Third Party Approvals

FPLSM – Freeze Protection Line Sensing Monitor Series

The FPLSM series controls heat trace lines with individual Chromalox RTBC, RTBC-EP, E100 or E121 pipe line sensing controls. Each circuit should be controlled by and individual sensor/controller. Depending on the application, controllers can switch more that one circuit.

The FPLSM is identical to the FPLS Plug. It features the WeatherTrace Sentinel which continually monitors the supply voltage to each individual heat trace circuit without the need for additional staff. Loss of voltage or a ground fault condition triggers an automatic alarm condition, alerting plant personnel of critical process problems and reducing downtime. An annunciator panel then identifies the faulted zone and a Common Alarm is activated with the re-ring feature.*

* The re-ring feature allows the WeatherTrace panel to communicate additional alarm conditions in the system by momentarily clearing and resetting the alarm output contact. The customer's monitoring device such as a PLC or DCS would interpret this condition to alert the operators of an additional alarm occurring.

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