Eaton Cutler-Hammer Magnum Digitrip 220+ Instructions Manual page 12

Page 12
L
N
3
R/1
Notes:
1 In this scheme, all breaker secondary currents (at the 100 mA level) are summed together at the PC
board donut transformer to sense ground fault via element R 5 .
2 No jumper on secondary contacts B-6, B-7.
3 Neutral input (if 4-wire) is via contacts B-4, B-5. Neutral current input to secondary contacts is 1A,
equivalent to 1 per unit ground.
Figure 2.2 3-Pole, 4-Wire Breaker with Neutral Sensor Connections for 3200A Frame Using Residual GF Sensing
2000:1
Figure 2.3 Neutral Sensor Connections for 4000A Frame Using Residual Ground Fault Sensing
Courtesy of NationalSwitchgear.com
Source
L L L
A B C
1
R/1
1
2
B-7
B-6
B-5
B-4
Load
Source
L L L L L L L
N1 N2 A1 B1 C1 A2
2000:1 2000:1
2
2000:1
2000:1
2000:1
2000:1
B-7
B-6
B-5
B-4
2000:1
Load
Notes:
1 In this scheme, all breaker secondary currents (at the 100 mA level) are summed together at the PC
board donut transformer to sense ground fault via element
In this scheme, the current sensors in the breaker poles are parallel-wired to achieve a 4000 amp
2
breaker rating. Other available ratings in this double-wide configuration are 6300A, 5000A,
3200A, 2500A, and 2000A.
Black
K1-2
+
Trip
Actuator K1-3
-
10:1
K1-9
K1-8
K1-7
K1-6
K1-5
1
K1-4
K2-1
K2-7
K2-9
K2-8
10:1 AUX. CT
L
B2 C2
Black
K1-2
+
Trip
Actuator K1-3
-
20:1
K1-9
K1-8
K1-7
K1-6
K1-5
K1-4
K2-1
K2-7
K2-9
K2-8
20:1 AUX. CTs
R .
5
I.L. 70C1037H04
Digitrip 520
with GF
1
R
5
Digitrip 520
with GF
1
R
5
Effective 7/1/2003