Siemens I-T-E Sensitrip MD Series, Information And Instruction Manual

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MD and ND-Frame Trip Adjustments
7
Figure 1
I
n
= Maximum circuit breaker ampere rating.
I
r
= Current Rating—a function of continuous ampere adjust-
ment setting expressed in % of I
n
Adjustable Long Time Delay
Seconds @ 6 x I
r
SMD/SND models with an adjustable long time delay switch
allow for selection of long time delays of fixed time intervals
at six times the continuous amps setting (1,). See Figure 1 for
the possible settings for this switch.
I
g
= Ground Fault Pickup—a function of adjustment setting
expressed in % of I
n
.
Adjustable Continuous Amps Switch
I
r
= %I
n
All SMD-SND solid state molded case circuit breakers have
an adjustable continuous amps rating switch. Adjustments
made to this switch can change the continuous amps rating
of the breaker to 20, 30, 40, 50, 60, 70, 80 or 90% of the
maximum continuous amps rating (In) of the circuit breaker.
See Figure 1 for the possible settings for this switch.