Jumo Temperature limiter
Its impact-resistant housing made from high quality plastic makes the 1-pole mechanical body thermostat with changeover contact very robust and can also be used under harsh conditions. The measuring system used works according to the principle of liquid expansion and can be used without any problem up to a maximum admissible sensor temperature of 149 °C. The smooth round sensor made of copper has a diameter of 6 mm with a probe length of approx. 66 mm. The remote control cable of the thermostat is also rolled up out of copper and on delivery inside the housing. Under consideration of a bending radius of 5 mm the remote line can be led out of the housing and laid flexibly as required. The protective sleeve made of nickel-plated brass included in the delivery has a diameter of 8 mm and can be mounted with a thread G 1/2 shape A according to DIN 3852/2. The maximum permissible ambient temperature on the housing (protection type IP54) is 80 °C. The case is attached directly to the lower part of the housing as a wall mounting or by means of a tensioning belt on a pipe. The desired shutdown temperature can be easily adjusted with the help of a screw driver after removing the cover on a scale. The set switch-off temperature can be viewed at any time via a window in the housing cover. The safety temperature limiter has a high switching point accuracy of +0/-5 K in the upper half of the scale. The installed temperature compensation reduces ambient temperature influences at the switching head to a minimum. A decisive advantage is that no additional power supply is required for measuring the temperature. The electrical connection is made by push-in© terminals, whereby the installation time is significantly reduced compared to conventional screw connections. The maximum permissible switching power is AC 230 Volt / 16 A. The switch contact (clamp 2) is opened when the set temperature is reached and the signal contact (clamp 4) is closed at the same time. The switch contact is locked automatically and can only be unlocked manually after the temperature at the sensor has cooled down by approx. 10 K. If the temperature at the sensor cools below -20 °C, the circuit between terminal 1 and terminal 2 also opens, but closes again when the temperature increases If the measuring system is destroyed, the circuit will be opened continuously and unlocking is then no longer possible. The switch contact is in the neutral position. The safety temperature limiter has great flexibility, and is used both in building automation and in heating, air conditioning and ventilation systems. Other areas of application are the plastics industry, equipment and mechanical engineering as well as furnace construction, and temperature monitoring in laboratories and climate chambers. The device is approved according to DIN EN 14597 and DGRL and has an EAC approval.This text is machine translated.