MIL-DTL-17361G(SH)
PARAGRAPH
PAGE
4.5.6.1 Electric operating mechanisms ......................................................................................................24
4.5.6.1.1 Voltage range ........................................................................................................................24
4.5.6.1.2 Closing time ..........................................................................................................................24
4.5.6.2 Undervoltage release .....................................................................................................................24
4.5.6.2.1 Operating voltage range ........................................................................................................25
4.5.6.2.2 Dropout voltage range...........................................................................................................25
4.5.6.2.3 Time delay ............................................................................................................................25
4.5.6.3 Shunt trips......................................................................................................................................25
4.5.7 Undervoltage time delay ........................................................................................................................25
4.5.8 Auxiliary switch rating ...........................................................................................................................25
4.5.9 Endurance...............................................................................................................................................25
4.5.9.1 Circuit breakers...............................................................................................................................25
4.5.9.1.1 Mechanical endurance test ....................................................................................................25
4.5.9.1.1.1 Test set-up and method of cycling ...............................................................................25
4.5.9.1.1.2 Number and rate of operations .....................................................................................25
4.5.9.1.2 Electrical endurance test .......................................................................................................25
4.5.9.1.2.1 Test set-up and method of cycling ...............................................................................25
4.5.9.1.2.2 Number and rate of operations ....................................................................................25
4.5.9.2 Attachments ...................................................................................................................................25
4.5.9.2.1 Electric operating mechanism ...............................................................................................25
4.5.9.2.2 Undervoltage release device .................................................................................................26
4.5.9.2.3 Shunt trip...............................................................................................................................26
4.5.9.2.4 Example ................................................................................................................................26
4.5.10 Calibration ............................................................................................................................................26
4.5.10.1 Circuit breakers with thermal magnetic trip units........................................................................26
4.5.10.1.1 Long-time delay ..................................................................................................................26
4.5.10.1.2 Instantaneous trip elements .................................................................................................26
4.5.10.2 Calibration of circuit breakers with electronic trip unit ...............................................................28
4.5.10.2.1 Long-time delay ..................................................................................................................28
4.5.10.2.1.1 Long-time thermal memory (for circuit breakers with electronic trip units only)......28
4.5.10.2.1.1.1 Example of long-time delay and long-time thermal memory testing (AQB-A252
circuit breaker) ..........................................................................................................................28
4.5.10.2.2 Instantaneous trip elements .................................................................................................30
4.5.10.2.3 Short-time delay..................................................................................................................30
4.5.10.3 Abbreviated calibration testing ....................................................................................................31
4.5.10.3.1 Long-time delay ..................................................................................................................31
4.5.10.3.2 Instantaneous ......................................................................................................................32
4.5.10.3.3 Short-time delay..................................................................................................................32
4.5.11 Inclined operation.................................................................................................................................32
4.5.12 Temperature rise...................................................................................................................................32
4.5.12.1 Circuit breaker .............................................................................................................................32
4.5.12.1.1 Test circuit ..........................................................................................................................32
4.5.12.1.2 Sensor locations ..................................................................................................................32
4.5.12.1.2.1 Ambient......................................................................................................................32
4.5.12.1.2.2 Circuit breaker............................................................................................................32
4.5.12.1.3 Temperature stabilization and temperature rise determination ...........................................32
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