Technical Data
Effective: May 1998 Page
5
TD.44A.01.T.E
Cutler-Hammer
Magnum DS
Metal-Enclosed
Low-Voltage Switchgear
Ratings
Table R8 – Digitrip Ground Fault Current Pickup Settings
Pickup Settings – Ground Fault Currents (Amperes)
➀
0.25
➁
0.3
➁
0.35
➁
0.4
➁
0.5
➁
0.6 0.75 1.00
Installed
Rating Plug
(Amperes) I
n
200 50 60 70 80 100 120 150 200
250 63 75 88 100 125 150 188 250
300 75 90 105 120 150 180 225 300
400 100 120 140 160 200 240 300 400
600 150 180 210 240 300 360 450 600
800 200 240 280 320 400 480 600 800
1000 250 300 350 400 500 600 750 1000
1200 300 360 420 480 600 720 900
1200
1600 400 480 560 640 800 960
1200 1200
2000 500 600 700 800 1000
1200 1200 1200
2500 600 720 840 960
1200 1200 1200 1200
3000 750 900 1050
1200 1200 1200 1200 1200
3200 800 960 1120
1200 1200 1200 1200 1200
4000 1000
1200 1200 1200 1200 1200 1200 1200
5000
1200 1200 1200 1200 1200 1200 1200 1200
Table R9 – Digitrip Ground Fault Pickup Values
for Secondary Injection Test Kit Amperes
Installed
Rating
Plug
Sensor
Rating
Pickup (Dial) Setting
Values In Secondary Amperes
➀
25%
➁
30%
➁
35%
➁
40%
➁
50%
➁
60% 75% 100%
200 200 1.25 1.50 1.75 2.00 2.50 3.00 3.75 5.00
250 250 1.25 1.50 1.75 2.00 2.50 3.00 3.75 5.00
300 300 1.25 1.50 1.75 2.00 2.50 3.00 3.75 5.00
400 400 1.25 1.50 1.75 2.00 2.50 3.00 3.75 5.00
600 600 1.25 1.50 1.75 2.00 2.50 3.00 3.75 5.00
800 800 1.25 1.50 1.75 2.00 2.50 3.00 3.75 5.00
1000 1000 1.25 1.50 1.75 2.00 2.50 3.00 3.75 5.00
1200 1200 1.25 1.50 1.75 2.00 2.50 3.00 3.75 5.00
1600 1600 1.25 1.50 1.75 2.00 2.50 3.00 3.75 3.75
2000 2000 1.25 1.50 1.75 2.00 2.50 3.00 3.00 3.00
2500 2500 1.25 1.50 1.75 2.00 2.40 2.40 2.40 2.40
3000 3000 1.25 1.50 1.75 2.00 2.00 2.00 2.00 2.00
3200 3200 1.25 1.50 1.50 1.88 1.88 1.88 1.88 1.88
4000 4000 1.25 1.50 1.50 1.50 1.50 1.50 1.50 1.50
5000 5000 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20
➀
Tolerance on pickup levels are
±
10% of values
shown in chart.
➁
For Testing Purposes Only: When using an ex-
ternal single-phase current source to test low
level ground fault current settings, it is advis-
able to use the Auxiliary Power Module
(APM). Especially when the single-phase cur-
rent is low, without the APM it may appear as
if the trip unit does not respond until the cur-
rent is well above the set value, leading the
tester to believe there is an error in the trip
unit when there is none. The reason this oc-
curs is that the single-phase test current is not
a good simulation of the normal three-phase
circuit. If three-phase had been flowing, the
trip unit would have performed correctly. Use
the APM for correct trip unit performance
when single-phase tests are made.
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