Eaton Digitrip 520 - Page 6

6
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
Table 1. Protection Types Available for Digitrip Trip Units
Digitrip Trip Unit Type 520/520i 520M/520Mi 520MC/520MCi
Ampere range 200–6300A 200–6300A 200–6300A
rms sensing Yes Yes Yes
Communications No No Yes
c
Protection and coordination
Figure number reference 16, 17, 18, 19 20, 21, 22, 23 24, 25, 26, 27, 28, 29
Protection Ordering options LI, LSI, LSIG, WLSIG MLSI, MLSIG, MLSIA, MWLSIG CLSI, CWLSIG, ARMLSI, ARMLSIG,
ARMLSIA, ARMWLSIG
Fixed rating plug (I
n
) Yes Yes Yes
Overtemperature trip Yes Yes Yes
Long delay protection Long delay setting 0.4–1.0 x (I
n
) 0.4–1.0 x (I
n
) 0.4–1.0 x (I
n
)
Long delay time I
2
t at 6 x (I
r
) 2–24s 2–24s 2–24s
Long delay thermal memory Yes Yes Yes
Short delay protection Short delay pickup
a
200–1000% x (I
r
) 200–1000% x (I
r
) 200–1000% x (I
r
)
Short delay time I
2
t at 8 x (I
r
) 100–500 ms 100–500 ms 100–500 ms
Short delay time FLAT 100–500 ms 100–500 ms 100–500 ms
Short delay time ZSI
b
Yes Yes Yes
Instantaneous Protection Instantaneous pickup
a
200–1000% x (I
n
) 200–1000% x (I
n
) 200–1000% x (I
n
)
OFF position Yes, except for LI Yes Yes
Making current release Yes Yes Yes
Ground (earth) fault protection Ground fault option Yes Yes Yes
Ground fault alarm No Yes
d
Yes
d
Ground fault pickup 25–100% x (I
n
)
c
25–100% x (I
n
)
c
25–100% x (I
n
)
c
Ground fault delay I
2
t at 0.625 x (I
n
) 100–500 ms 100–500 ms 100–500 ms
Ground fault delay flat 100–500 ms 100–500 ms 100–500 ms
Ground fault ZSI
b
Yes Yes Yes
Ground fault memory Yes Yes Yes
Neutral protection Yes, Cat LSI only Yes, Cat MLSI only Yes, Cat CLSI only
Maintenance Mode No No Yes
g
System diagnostics
Status/long pickup LED Yes Yes Yes
High load alarm/alarm contacts No Yes
d
, Cat MLSI only Yes
d
, Cat CLSI only
Cause of Trip LEDs Yes
e
Yes
e
Yes
e
Magnitude of trip current No Yes
d
Yes
d
Remote ground trip/alarm contacts No Yes
d
Yes
d
System metering
Digital display No Four-char. LCD Four-char. LCD
a
Additional setting is marked M1 where:
800–3200A Frame: M1 = 14 x /
n
for plug amps 200–1250A
M1 = 12 x /
n
for plug amps 1600, 2000, 2500A
M1 = 10 x /
n
for plug amps 3000, 3200A, 4000A (IEC only)
4000–6300A Frame: M1 = 14 x /
n
for plug amps 2000, 2500A
M1 = 12 x /
n
for plug amps 3200, 4000, 5000A (see Section 2)
M1 = 10 x /
n
for plug amps 6000, 6300A
b
ZSI = Zone selective interlock (see Section 3).
c
Limited to 1200A; this is only for UL versions, not for IEC models that have “W” in catalog number.
d
Requires Ground Alarm/Power Supply Module (see Section 1).
e
Four Cause of Trip LEDs—L, S, I, G. Making current release is indicated by the Instantaneous LED.
f
6300A rating for IEC only.
g
Units with ARM in catalog number.