14
Instructional Leaflet
IL70C1037H05
Effective October 2009
Digitrip models 520, 520i; and 520M, 520Mi,
520MC, 520MCi trip units for use only in
Magnum and Magnum DS circuit breakers
eaton corporation
www.eaton.com
Figurt 9. Digiorip Ntuoral StnsNr Typts (Nr SNurct GrNund StnsNr)
Figurt 10. FNur-PNlt 3200A Framt (4000A IEC) Using Rtsidual GrNund Faulo (Earoh-Faulo) Stnsing
Item
Current Ratio
H01
200:1
H02
250:1
H03
300:1
H04
400:1
H05
600:1
H06
800:1
H07
1000:1
H08
1200:1
H09
1600:1
H10
2000:1
H11
2500:1
H12
3000:1
H13
3200:1
H14
630:1
H15
1250:1
H16
3150:1
H17
4000:1
H18
100:1
All secondary currents to be 1.00A nominal
at full scale.
Insulation level: 0.6 kV, BIL 10 kV, full-wave
Continuous thermal current rating factor:
1.33 at 30°C ambient.,1.0 at 55°C ambient
L
N
R
5
R/1
R/1
K2-8
B-6
K1-4
K1-3
10:1
10:1 Aux. CT
K2-9
B-7
K1-5
K1-2
+
-
L
B
L
C
L
A
K1-6
K1-7
K1-8
K1-9
1
1
1
Source
Black
Trip
Actuator
Digitrip 520
with GF
a
a
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
.
b
Do not jumper on secondary contacts
B-6, B-7. This will defeat all ground
fault protection in application for
four-pole breaker.
b
Load
