MIL-DTL-17060G(SH)
3.6.4 Weight. Unless otherwise specified (see 6.2), motors shall conform to weight limitations as specified on
3.6.5 No-load input (induction motors only). The no-load amperes and watts (see 4.6.10) shall not differ from
the values measured during first article testing by more than the percentages specified in table VII.
TABLE VII. Tolerance for no-load input and stator resistance.
No-load input
Stator resistance
at 77 °F (25 °C)
hp
Amps
Watts
(percent)
(percent)
(percent)
All
±10
+15
±5
3.6.6 Pull-up torque, breakdown torque, locked-rotor torque, locked-rotor current, locked-rotor impedance, and
slip (induction motors only). Motors shall meet the requirements for pull-up torque (see 6.6.21), breakdown torque
(see 6.6.3), locked-rotor torque (see 6.6.13), locked-rotor current (see 6.6.12), locked-rotor impedance, and slip
specified in 3.6.6.1 through 3.6.6.2.3 (see 4.6.11). VSD motors meeting 3.5.2.8.2 shall meet the requirements for
design B or B7 motors as applicable.
3.6.6.1 Single-speed motors. Values specified herein apply only to squirrel-cage induction motors (see
3.6.6.1.1 Pull-up torque. The pull-up torque of designs A, B, and C continuous duty motors with rated voltage
and frequency applied shall be not less than rated full-load torque (see 6.6.9). With rated voltage and frequency
applied, the pull-up torque of design B7 motors shall be not less than 70 percent of full-load torque. With rated
voltage and frequency applied, the pull-up torque of design FF motors shall be not less than 115 percent of full-load
torque.
3.6.6.1.2 Breakdown torque. With rated voltage and frequency applied, breakdown torque of the motors shall
be in accordance with the values specified in table VIII.
3.6.6.1.2.1 Design FF. With rated voltage and frequency applied, the breakdown torque of design FF motors
shall be not more than 225 percent full-load torque.
TABLE VIII. Breakdown torque.
Breakdown torque
Synchronous speeds
Percent of full-load torque (min)
hp
(r/min)
Design B and B7
Design C
½
720
200
--
1200
275
--
¾
900
220
--
720 and lower
200
--
1800
300
--
1200
265
--
1
900
215
--
720 and lower
200
--
28
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