Marine Surface Mounted Temperature Switch

Specification

 





Special Features

• Version according to DIN EN 14597

• Pressure Equipment Directive 2014/68/EU

• Sturdy housing (protection type IP54)

• Microswitch

• Self-monitoring (STB/STW [STB]) in the event of a pressure drop

• Safety cut-out (STB/STW [STB])

• Control range -501 to +500 °C
  
  

Thermostats control and monitor thermal processes. Instruments of the ATH series are available as temperature controllers TR, temperature monitors TW, safety temperature monitors STW(STB), and safety temperature limiters STB. When malfunctions occur, the STB places the system being monitored in a safe operating status.

Surface-mounted thermostats operate according to the fluid expansion principle. A microswitch is used as an electrical switching element.

Switching Functions

Temperature controller TR and Temperature monitor TW

If the temperature on the temperature probe exceeds the setpoint value, the electrical circuit is opened or closed by a microswitch. If the temperature falls below the selected setpoint value (by the switching differential), the microswitch is reset to its initial position.

Restart lock at safety temperature limiter STB

If the temperature at the temperature sensor exceeds the set limit value, the electrical circuit is opened and the microswitch is mechanically locked. After falling below the limit value by approx. 10 % of the temperature range (approx. 15 % of the limit value setting > +350 °C), the switch can be unlocked manually.

Use of the safety temperature monitor STW as safety temperature limiter STB

In this case, the circuit following the thermostat must comply with DIN EN 14597 and VDE 0116.

Self-monitoring for safety temperature limiter STB and safety temperature monitor STW  (STB)

If the measuring system is destroyed (i.e. if the expansion fluid escapes) the pressure in the membrane of the STB and STW (STB) drops and permanently opens the electrical circuit. Unlocking is then no longer possible. When the STW (STB) and STB sensors cools down to the negative temperature range, the circuit opens, but must be unlocked manually by the reclosing button when the temperature rises. The STW (STB) restarts automatically.

Technical Data
Control ranges and temperature probes

Capillary and temperature probe

Electrical data

Environmental influences

Housing

Process connection

Dimensions

Versions with rigid thermowell

Process Connection

for versions with rigid thermowell

Connection Diagram

Wiring diagrams