ABB - 1SVR550800R9300 - CM-MSE THERMISTOR PROTEC. 110V 1N/O

• 
  heavy duty starting
  


• 
  increased switching frequency
  


• 
  single-phase operation
  


• 
  high ambient temperature
  


• 
  insufficient cooling
  


• 
  break operation
  


• 
  unbalance
  

The relay is independent of the rated motor current, the insulation class and the method of starting. The PTC sensors are connected in series to the terminals Ta and Tb (or Ta and Tbx without short-circuit detection). The number of possible PTC sensors per measuring circuit is limited by the sum of the individual PTC sensor resistances: RG = R1 R2 RN 1.5 k .




Under normal operating conditions the resistance is below the response threshold. If only one of the PTC resistors heats up excessively, the output relay de-energizes. If the autoreset function is configured, the output relay energizes automatically after cooling down. Devices with manual (push button on front-side) or remote reset configuration have to be controlled via the control input by the required signal.




Further applications include the temperature monitoring of equipment with PTC sensors integrated, such as:

• 
  machine rolling bearings
  


• 
  hot-air ventilators
  


• 
  oil
  


• 
  air
  


• 
  heating installations, etc.