Eaton Cutler-Hammer Magnum Digitrip 220+ Instructions Manual page 13

I.L. 70C1037H04
Figure 2.4 Digitrip Neutral Sensor Types
L
N
B-7
2
B-6
R/1
Notes:
In this scheme, all breaker secondary currents (at the 100 mA level) are summed together at the PC
1
board donut transformer to sense ground fault via element R
2 Do not jumper on secondary contacts B-6, B-7. This will defeat all ground fault protection in
application for 4 pole breaker.
3 Ground fault style trip unit is installed.
Figure 2.5 4-Pole–3200A Frame Using Residual Ground Fault (Earth-Fault) Sensing
Effective 7/1/2003
Courtesy of NationalSwitchgear.com
Source
L L L
A B C
1
R/1
1
Load
Black
K1-2
+
Trip
Actuator K1-3
-
10:1
K1-9
K1-8
K1-7
K1-6
K1-5
1
K1-4
K2-9
K2-8
10:1 AUX. CT
.
5
Page 13
Digitrip 520
with GF
1
R
5