4.5.7.2 Short-time delay. Circuit breakers shall be tested in accordance with Tables X, XI, and XII.
TABLE X. Short-time delay pickup testing (electromechanical and electronic trip units).
Trip status
STDPU
Applied
Left pole (short-time delay set at
Center pole ( short-time delay set at
Right pole ( short-time delay set at
switch
current
min. band)
intmd. band) /2
max. band)
setting /1
(amps)
Required
Actual
Required
Actual
Required
Actual
90% of
No trip
No trip
No trip
nominal
STDPU
Min.
Setting
110% of
Trip
Trip
Trip
nominal
STDPU
90% of
No trip
No trip
No trip
nominal
STDPU
Intmd.
setting
110% of
Trip
Trip
Trip
nominal
STDPU
90%
No trip
No trip
No trip
nominal
STDPU
Max.
setting
110% of
Trip
Trip
Trip
nominal
STDPU
NOTES:
/1 Minimum, intermediate (or as close to middle as possible) and maximum short-time delay pickup (STDPU) setting available on the circuit breaker, as
specified in the applicable specification sheet.
/2 Intermediate (or as close to middle as possible) short-time delay band setting available on the circuit breaker, as specified in the applicable specification
sheet.
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