Entering 299B Switching Devices

Windchill Risk and Reliability Desktop Help > Windchill Prediction > Part Parameters Required for Predictions > 299B Part Parameters > Entering 299B Switching Devices

The following table describes the part parameters required for switching devices when 299B is the selected calculation model. The subcategories of switches supported by the 299B model are:

• Basic Sensitive

• Rotary

• Thumbwheel

• Toggle or Pushbutton

Parameter	Type	Description
Quality Level	Choice List [Parts Count also]	The appropriate quality screening level of the device. Accepted quality levels and values for switches follow. • A = 0.30 • B1 = 0.60 • B2 = 1.00 • C = 5.00
Load Type	Choice List	The type of load connected external to the device. Choices are: • Lamp • Inductive • Resistive
# of Active Contacts	Integer	The number of conductive elements in the switching device that mate with another element for the purpose of transferring electrical energy.
Cycling Rate	Real	The average number of switching cycles per day.
[Current Parameters]	---	For more information, see Current Parameters.
[Derating Parameters]	---	For more information, see Derating Parameters.

The updated 299B standard does not have a table defining the Pi L for toggle switches because this value is now calculated in the same manner as other switch types.