8
MD and ND-Frame Trip Adjustments
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 Short Time Pickup
x I
r
SMD/SND models with an adjustable short time pickup
switch allow for selection of short time pickup in a range from
1.5 to 10 times the setting of the Adjustable Continuous
Amps Switch. The OFF position disables the function. 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 Short Time Delay
Seconds
SMD/SND models with an adjustable short time delay switch
allow for selection from two modes of short time delays. The
first range of settings enable the breaker to be set for fixed
time delays of .05, .1, .2, .3 or .5 seconds. The second range
of settings enable the breaker to be set for short time delays
based on 12t curves at six times the continuous amps setting.
See Figure 1 for possible settings for this switch.
Содержание I-T-E Sensitrip MD Series
Страница 2: ......
Страница 6: ...4 I T E Sensitrip Digital Circuit Breaker MD and ND Frame Outline Drawings 1 3 Pole ...
Страница 8: ...6 MD and ND Frame Trip Adjustments ...
Страница 12: ...10 MD and ND Frame Time Current Curve 600 1000A With Short Time Delay Set on Fixed Time ...
Страница 13: ...MD and ND Frame Time Current Curve 11 1200A With Short Time Delay Set on Fixed Time ...
Страница 14: ...12 MD and ND Frame Time Current Curve 600 100A With Short Time Delay Set on I2 t ...
Страница 15: ...MD and ND Frame Time Current Curve 13 1200A With Short Time Delay Set on I2 t ...
Страница 16: ...14 MD and ND Frame Time Current Curve 600 100A Without Short Time Settings ...
Страница 17: ...MD and ND Frame Time Current Curve 15 1200A Without Short Time Settings ...
Страница 18: ...16 MD and ND Frame Time Current Curve Ground Fault Trip Data ...
Страница 19: ...MD and ND Frame Time Current Curve 17 Example ...
Страница 20: ...18 MD and ND Frame Let Thru Curves ...
Страница 31: ...Installation Diagrams 29 ...
Страница 35: ...I T E Mechanical Interlock M15404 33 Figure 7 ...
Страница 41: ...Installation Diagrams 39 ...
Страница 49: ...Installation Diagrams 47 ...
Страница 50: ...48 I T E Panelboard Connecting Straps 1 ...
Страница 53: ...Installation Diagrams 51 ...