Eaton Digitrip 520 - Page 35

35
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
Figure 49. Typical Zone Interlocking Connections with Two Main Breakers (M1, M2) and a Tie Breaker (T)
F23
C
ZO
ZI
F22
C
ZO
ZI
T
C
ZO
ZI
F21
C
ZO
ZI
F12
1N4004
D1
C
ZO
ZI
M2
C
ZO
ZI
M1
C
ZO
ZI
F11
C
ZO
ZI
0.5 Sec. 0.5 Sec.
0.3 Sec.
0.1 Sec. 0.1 Sec. 0.1 Sec. 0.1 Sec. 0.1 Sec.