TABLE XII. Short-time resettable delay testing (electromechanical and electronic trip units).
Trip status
STDPU
Applied
Left pole (short-time delay set at min.
Center pole (short-time delay set at
Right pole (short-time delay set at
switch
current
band)
intmd. band) /3
max. band)
setting /1
(amps) /2
Required
Actual
Required
Actual
Required
Actual
150% of
Intmd.
No trip
No trip
No trip
nominal
setting
STDPU
150% of
Max.
No trip
No trip
No trip
nominal
setting
STDPU
NOTES:
/1 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 Duration of applied current shall be one-half (1/2) cycle less than the circuit breaker short-time delay setting bandwidth minimum as specified in the
applicable specification sheet.
/3 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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