Class 531 Vibration Switches

  • NEC/CEC - Type TBSM:
    – Class I, Division 1, 2, Groups C, D
    Class I, Zone 1, 2, Group IIA, IIB
    Class II, Division 1, 2, Groups E, F, G
    Class III
    NEMA 4, 7CD, 9EFG

  • NEC - Type TBSM-B:
    Class I, Division 1, 2, Groups B, C, D
    Class I, Zone 1, 2, Group IIA, IIB+H2
    Class II, Division 1, 2, Groups E, F, G
    Class III
    NEMA 4, 7BCD, 9EFG

The Vibration Switch is a safety device designed for protecting rotating machinery such as motors, generators, engines, pumps and fans from abnormal levels of vibration. The switch trips if the vibration level becomes excessive, shutting down the device being protected. The switch operates by means of a magnetic air gap, with an increased air gap for low vibration and a decreased air gap for high vibration levels. The air gap can be adjusted to set the sensitivity of the switch.

Class 531 Vibration Switches Catalog Pages

Applications Features Catalog Numbers
  • Shut down switch that operates in response to excessive vibration
  • Protects rotating machinery such as motors, generators, engines, pumps and fans from damage due to abnormal vibration

O-Z/Gedney 

Class 531 Vibration Switches