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MIL-DTL-17587 Circuit Breakers, Acb, Low Voltage, Electric Power, Air, Removable Construction, General Specification ForThis specification covers ACB, low voltage, electric power, air circuit breakers with removable construction, their stationary component \(cradle\), and attachments for shipboard use.

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TABLE VII. Long-time delay pickup testing (electromechanical and electronic trip units).
Trip status
Long-time
Applied
Left pole
Center pole
Right pole
All poles /2
pickup
current (amps)
setting /1
Required
Actual
Required
Actual
Required
Actual
Required
Actual
90% of nominal
No trip
No trip
No trip
No trip
LTDPU
Min.
110% of
setting
nominal
Trip
Trip
Trip
Trip
LTDPU
90% of nominal
No trip
No trip
No trip
No trip
LTDPU
Intmd.
110% of
setting
Trip
Trip
Trip
Trip
nominal
LTDPU
90% of nominal
No trip
No trip
No trip
No trip
LTDPU
Max.
110% of
setting
Trip
Trip
Trip
Trip
nominal
LTDPU
NOTES:
/1 Minimum, intermediate (or as close to middle as possible) and maximum long-time delay pickup (LTDPU) setting available on the circuit breaker, as
specified in the applicable specification sheet.
/2 For electromechanical circuit breakers, current shall flow through all poles simultaneously with poles in series. For electronic circuit breakers, three-phase
current shall flow through all poles simultaneously (not three poles in series).



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