S21B

Technical Characteristics

• Nominal Thread Size

  0.190 inches single group

• Winding Operating Current

  750.0 milliamperes dc maximum single component 2nd secondary

• Input-Output Phase Relationship

  three phase to single phase single component

• Body Height

  4.500 inches nominal

• Inclosure Type

  hermetically sealed

• Frequency Rating

  400.0 hertz nominal single component

• Center To Center Distance Between Mounting Facilities Parallel To Width

  2.656 inches minimum single mounting facility single center group and 2.719 inches maximum single mounting facility single center group

• Winding Shielding Method

  internal shield grounded to core and brought out to terminal single component

• Thread Class (Non-Core)

  err-070

• Winding Operating Voltage

  32.20 ac volts nominal single component 1st secondary

• Winding Operating Voltage

  17.90 ac volts nominal single component 3rd secondary

• Winding Function And Quantity

  1 primary single component and 3 secondary single component

• Winding Operating Current

  750.0 milliamperes dc maximum single component 3rd secondary

• Winding Operating Current

  30.0 amperes dc maximum single component 1st secondary

• Mounting Facility Quantity

  4 single group

• Overall Height

  4.880 inches nominal

• Center To Center Distance Between Mounting Facilities Parallel To Length

  3.281 inches minimum single mounting facility single center group and 3.344 inches maximum single mounting facility single center group

• Winding Tap Location (Non-Core)

  err-070

• Mounting Method

  threaded stud single group

• Thread Quantity Per Inch

  32 single group

• Body Width

  3.688 inches maximum

• Thread Series Designator

  unf single group

• Winding Operating Voltage

  180.00 ac volts nominal single component single primary

• Winding Operating Voltage

  17.90 ac volts nominal single component 2nd secondary

• Terminal Type And Quantity

  14 turret

• Body Length

  4.312 inches maximum

• Reliability Indicator

  not established