Siemens ITE Specifikace stáhnout pdf (Strana 11)

MD and ND-Frame Trip Adjustments

Figure 1

= Maximum circuit breaker ampere rating.

= Current Rating—a function of continuous ampere adjust-

ment setting expressed in % of I

Adjustable Instantaneous Trip Switch

x I

Instantaneous settings are multiples of the continuous cur-

rent setting.

NOTE: Maximum instantaneous trip is 10,000 Amps—with

instantaneous setting on “MAX”, time delay is eliminated.

= Ground Fault Pickup—a function of adjustment setting

expressed in % of I

Adjustable Ground Fault Pickup

Pickup I

=%I

Delay 1

t @ 51n

Ground fault protection is available for 3 phase, 3 wire and 3

phase 4 wire (neutral) electrical systems. SMD/SND models

with an adjustable ground fault delay switch allow for the

selection of ground fault pickup at 20, 25, 30, 40, 55 or 70%

of the maximum amps rating (%I

), with an 1

t delay of .1, .2,

or .4 sec @ .5 x I

See Figure 1 for possible settings for this

switch

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Siemens ITE Specifikace Strana 11